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[2020.01.07 PM] NWS Boston EM Briefing: Scattered Snow Squalls This Afternoon, Developing Black Ice Tonight
by BOX Operations - NOAA Service Account 08 Jan '20

08 Jan '20

Good morning everyone, This e-mail is to raise awareness of scattered snow squalls for this afternoon into early tonight, with much colder air tonight contributing to the development of patchy black ice on untreated surfaces tonight. Details on each below: *Scattered Snow Squalls* *Where: *Possible anywhere in Southern New England, though greatest potential is into interior MA (near and west of I-495), northern RI and northern CT. *When:* Between noon and 6 PM today. *Impacts:* While not everyone will see snow squalls, areas that do will see short-lived heavy snow capable of brief whiteout conditions and gusty winds. A quick coating-inch of snow accumulation is possible in less than an hour's time in snow squalls. These conditions may make for difficult travel which could impact this afternoon's commute. *Uncertainty:* Coverage of snow squalls will be localized, with several areas staying dry. There is less certainty on snow squalls advancing into the coastal plain with temperatures hovering near or just above freezing. Following attachment is a Special Weather Statement sent this morning about our expectations for snow squalls this afternoon into tonight. *Black Ice/Freeze-Up* *Where: *Possible anywhere in Southern New England where snow and/or wet pavement exists. *When:* Developing tonight into the overnight. Threat should end after sunrise Thursday. *Impacts:* Wet or slushy pavement will turn slippery if untreated. Shaded locations, side streets, bridges and overpasses are most vulnerable. *Uncertainty*: Generally low with high confidence on sub-freezing temperatures. Gusty winds and drier air tonight may evaporate damp pavement in spots before freezing. Attached is a look at tonight's low temperatures based on our overnight/early morning forecast. While we are still fine-tuning these low temperatures, any change will likely be minimal. Please let us know if you have any questions or concerns! Thank You! Meteorologist: Andrew Loconto If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2020.01.07 PM] NWS Boston EM Briefing: Accumulating Snow Overnight Across Southeast New England
by BOX Operations - NOAA Service Account 07 Jan '20

07 Jan '20

Good afternoon everyone, The only real change with this afternoon's update is a Wind Advisory which has been issued for Cape Cod, the Islands, and portions of western/central MA for Wednesday afternoon into Wednesday night (see attached). A Winter Weather Advisory remains in effect for south coastal Massachusetts, Cape Cod and the Islands for between 2 and 4 inches of snow overnight. See the attached expected Snow Accumulations/Winter Weather Headlines. *WHAT/WHERE:* - Winter Weather Advisory issued for 2 to 4 inches of snow overnight across south coastal MA as well as Cape Cod and the Islands. - Lower snowfall totals are anticipated further northwest, with a coating to 2 inches expected in the Boston to Providence corridor. *WHEN:* *- *The snow will begin after 10 or 11 pm tonight with the accumulating snow pretty much over by 5 am Wednesday morning. - The snow may begin as a period of rain across the outer-Cape/Nantucket, but will change over to snow. Snowfall rates may reach 1 inch per hour across far southeast New England for a short time overnight. - Threat for accumulating snow will have pretty much ended by the start of the Wednesday morning commute, but untreated roads may be snow covered and slippery. *UNCERTAINTY:* - High confidence that the heaviest snowfall will occur across far southeast New England, but exact snowfall amounts remain uncertain. - Current indications are for 2 to 4 inches of snow across south coastal MA, Cape Cod and the Islands. A coating to 2 inches of snow is expected further northwest into the Boston to Providence corridor. - If the storm tracks a bit further northwest, the low risk exists for 2 to 4 inches of snow further northwest across most of RI and most of SE MA with localized 5 inch amounts possible near the Cape Cod Canal - If the storm tracks a bit further to the southeast, any threat for accumulating snow would be confined to Cape Cod and the Islands and would be just an inch or two. Please let us know if you have any questions or concerns! Thank You Meteorologist: Bryce Williams If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2020.01.07 AM] NWS Boston EM Briefing: Accumulating Snow Overnight Across Southeast New England
by BOX Operations - NOAA Service Account 07 Jan '20

07 Jan '20

Good morning everyone We just wanted to let you know a Winter Weather Advisory has been issued for south coastal Massachusetts, Cape Cod and the Islands for between 2 and 4 inches of snow overnight. We will attach the expected Snow Accumulations/Winter Weather Headlines along with a brief outline to this email. *WHAT/WHERE:* - Winter Weather Advisory issued for 2 to 4 inches of snow overnight across south coastal MA as well as Cape Cod and the Islands. - Lower snowfall totals are anticipated further northwest, with a coating to 2 inches expected in the Boston to Providence corridor. *WHEN:* *- *The snow will begin after 10 or 11 pm tonight with the accumulating snow pretty much over by 5 am Wednesday morning. - The snow may begin as a period of rain across the outer-Cape/Nantucket, but will change over to snow. Snowfall rates may reach 1 inch per hour across far southeast New England for a short time overnight. - Threat for accumulating snow will have pretty much ended by the start of the Wednesday morning commute, but untreated roads may be snow covered and slippery. *UNCERTAINTY:* - High confidence that the heaviest snowfall will occur across far southeast New England, but exact snowfall amounts remain uncertain. - Current indications are for 2 to 4 inches of snow across south coastal MA, Cape Cod and the Islands. A coating to 2 inches of snow is expected further northwest into the Boston to Providence corridor. - If the storm tracks a bit further northwest, the low risk exists for 2 to 4 inches of snow further northwest across most of RI and most of SE MA with localized 5 inch amounts possible near the Cape Cod Canal - If the storm tracks a bit further to the southeast, any threat for accumulating snow would be confined to Cape Cod and the Islands and would be just an inch or two. Please let us know if you have any questions or concerns! Thank You Meteorologist: Hayden Frank If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2019.12.31 AM Update] NWS EM Briefing: Icing Threat This Morning
by BOX Operations - NOAA Service Account 31 Dec '19

31 Dec '19

Good morning, We expect precipitation to end across most of southern New England by 7 AM, with all areas being dry by noon. Rain will be the dominant form of precipitation across eastern MA and RI. Still a threat of light icing north and west of I-495 in MA, into Worcester county. Winter Weather Advisories continue until 7 AM this morning for this threat of additional light icing. It is possible some of these advisories may need to be extended a couple of hours. Will evaluate temperatures closer to that time. Only a trace of additional icing is expected. Matthew Belk If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2019.12.30 430 PM Update] NWS Boston EM Briefing: Severe Icing Threat & Wintry Mix Thru Tonight
by BOX Operations - NOAA Service Account 30 Dec '19

30 Dec '19

Good afternoon everyone, Here is an update on the remainder of the ongoing winter storm. As of this afternoon we have received reports of icing from 0.25 to as much as 0.75 inches (in Goshen) in the slopes of the Berkshires, and up to 0.25" of icing in the Worcester Hills. This has been a very messy event with many locations switching between sleet, freezing rain, and snow. While the bulk of the event is behind us, we will continue to see a mix of rain, sleet, and snow into the overnight hours. *Frozen precip will continue to recede north through the early morning hours, adding up to an additional half inch of slushy sleet/snow generally north of Route 2. * *Additionally, some thunderstorms are possible with lightning and small hail into the early evening in western/central MA and northern CT. * If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2019.12.30 4 AM Update] NWS Boston EM Briefing: Severe Icing Threat & Wintry Mix Thru Tonight
by BOX Operations - NOAA Service Account 30 Dec '19

30 Dec '19

Good morning, Here is the latest information on a storm that is currently ongoing across Southern New England early this morning. We are still expecting significant/severe higher-elevation icing for the Berkshires into northern Worcester and northwest Middlesex Counties through tonight. Lesser, though still impactful icing is still anticipated for most areas west of Interstate 495. *What has changed:* Winter Weather Advisories which were previously in effect for eastern Massachusetts and central Rhode Island have been *cancelled*. Freezing rain is no longer expected to impact these areas. Mainly rain is now anticipated for these locations. Due to warmer surface temperatures, reductions in ice accumulations were made. Significant icing is still expected in the higher terrain in the Berkshires into northern Worcester County. *Current Watches/Warnings/Advisories in effect:* All warnings and advisories over land are in effect from tonight through Tuesday AM - *Ice Storm Warning **for the eastern slopes of the Berkshires, northern Worcester County and northwest Middlesex County.* Here is where the most significant icing is expected due to a long duration of freezing rain. Severe impacts can be expected with extensive power outages and tree damage. This morning's commute will be treacherous in these areas, with continued impacts into this afternoon's commute as well. - Winter Weather Advisory *for northern CT, northern Providence County in RI and across western, central and northeast MA west of I-495*. Mix of precipitation types for these areas. Expect lesser, but still impactful accretions of freezing rain and sleet. This morning's commute will be slick for these locations, with slickened roads still possible into this afternoon's commute. *Marine Watches/Warnings in effect:* - *Gale Warnings* for all of the coastal waters except for Narragansett Bay, through early Tuesday. *Main Weather Concerns: * 1) *Severe icing across the higher elevations* *of* *western and north central MA through tonight*. Coverage of freezing rain will continue to expand early this morning and last into Monday evening. For the slopes of the Berkshires, we still expect to have one half to three quarters of an inch of ice with isolated amounts up to three-quarters of an inch. In northern Worcester and northwest Middlesex Counties, one-quarter to one-half inch of ice with isolated totals to two-thirds of an inch. East to northeast winds will increase today, with gusts of 20-30 mph in the higher terrain by late afternoon. This, coupled with the ice, could worsen the impacts. By Tuesday, temperatures increase into the upper 30s and low 40s in the higher terrain allowing for melting. 2)* Lower elevations: Lesser amounts of freezing rain (with some limited periods of sleet at times) through today. *Accumulations of freezing rain and sleet will continue to expand in coverage, and impact this morning's commute. Additional light icing may impact this afternoon's commute as well. Icing amounts range from a light glaze to one-quarter inch. 3) *Strong east to northeast winds* are expected over the coastal waters and along the South Coast this afternoon into tonight. Expect gusts of 40-45 mph across Cape Cod and the Islands tonight. *What we are uncertain about:* *Moderate to high confidence:* - Uncertain on the duration and exact precipitation type outside of the Ice Storm Warning areas. - Uncertain on the areal coverage and duration of sleet. With the tendency for warmer temperatures, freezing rain and/or rain should predominate as weather types with less sleet. Attached images include the updated Winter Hazards in effect, and an updated Storm Total Ice forecast based on our morning forecast. Meteorologists: Andrew Loconto and Frank Nocera If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2019.12.29 4 PM Update] NWS Boston EM Breifing: Severe Icing Threat & Wintry Mix Tonight-Monday Night
by BOX Operations - NOAA Service Account 29 Dec '19

29 Dec '19

Good afternoon everyone, Here is the latest information on a storm that will impact Southern New England tonight into Tuesday. The greatest impacts are expected across the higher elevations of the slopes of the Berkshires, northern Worcester County and northwest Middlesex County. The graphics attached include the Winter Storm Severity Index (gives an idea where the worst impacts can be anticipated), storm total ice accumulations, current winter headlines, precipitation onset time, sustained wind speeds and peak gusts tonight into Monday afternoon (i.e. period when icing is greatest). *What has changed:* Winter Storm Warning changed to an Ice Storm Warning for northern Worcester County and northwest Middlesex County. In those areas we now expect one quarter to one half inch of ice with isolated totals to three quarters of an inch. *Current Watches/Warnings/Advisories in effect:* All warnings and advisories over land are in effect from tonight through Tuesday AM - *Ice Storm Warning **for the eastern slopes of the Berkshires, northern Worcester County and northwest Middlesex County.* Here is where the most significant icing is expected due to a long duration of freezing rain. Severe impacts can be expected with extensive power outages and tree damage. The Monday morning commute will be treacherous in those areas. - Winter Weather Advisory *for the rest of Southern New England except for southern RI, southern Plymouth & Bristol Counties in MA into Cape Cod and the Islands*. Mix of precipitation types for these areas. Expect lesser, but still impactful accretions of freezing rain and sleet. A slick Monday morning commute can be expected. *Marine Watches/Warnings in effect:* - *Gale Warnings* for all of the coastal waters except for Narragansett Bay. Starting Monday morning and continuing into early Tuesday. *Main Weather Concerns: * 1) *Severe icing across the higher elevations* *of* *western and north central MA tonight through Monday night*. Icing begins tonight and continues into Monday evening. For the slopes of the Berkshires we expect to have one half to three quarters of an inch of ice with isolated amounts up to one inch. In northern Worcester and northwest Middlesex Counties one quarter to one half inch of ice with isolated totals to three quarters of an inch. Easterly to northeasterly winds will increase throughout the day with gusts of 20-30 mph in the higher terrain by late afternoon. This, coupled with the ice, could worsen the impacts. By Tuesday temperatures increase into the upper 30s and low 40s in the higher terrain allowing for melting. 2)* Lower elevations: Lesser amounts of sleet and freezing rain tonight continuing through Monday. *Accumulations of freezing rain and sleet will impact the Monday morning commute. Across the MA East Coast, northernmost RI and CT a wintry mix is expected...changing to rain on Monday. Icing amounts range from a light glaze to one quarter inch. *Localized totals may be near a half-inch in spots northwest of I-84 and I-495 if freezing rain can remain more prolonged*. 3) *Strong east to northeast winds* are expected over the coastal waters and along the South Coast Monday night. Expect gusts of 40-45 mph across Cape Cod and the Islands Monday afternoon and evening. *What we are uncertain about:* *Moderate confidence:* - Uncertain on the duration and exact precipitation type outside of the Ice Storm Warning areas. If colder air lingers longer than currently forecast then this may result in a change to sleet and ice accumulations. The risk for this is highest across northeast MA, southern interior MA and into northern CT. - Monitoring the potential for higher ice accumulations across southern Worcester County and for extreme northwest Hartford County (Hartland). Meteorologists: Nicole Belk, Bill Babcock, Glenn Field and Bill Leatham If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2019.12.28 PM] NWS Boston EM Briefing: Significant Higher Elevation Icing Threat and Wintry Mix Tonight - Tuesday
by BOX Operations - NOAA Service Account 29 Dec '19

29 Dec '19

Good morning everyone, Here is the latest forecast information on a complicated storm system bringing concerns for significant higher-elevation icing and wintry mix of precipitation types for Southern New England tonight into Tuesday. *What Has Changed:* *Winter Headlines (In Effect Tonight through Tuesday AM, All Areas):* Ice Storm Warnings *for the eastern slopes of the Berkshires.* Predominantly freezing rain of a prolonged-duration is expected here, with the *most significant icing and impacts* expected for these locations. *Winter Storm Warning* *for northern Worcester County into northwest Middlesex County in MA. *Wintry mixture of freezing rain and sleet here, though greatest impact from freezing rain. *Significant icing and impacts* expected. Winter Weather Advisories *for most of the remainder of Southern New England (except southern RI, southern Plymouth & Bristol Counties in MA into Cape Cod and the Islands)*. Mix of precip types for these areas, with lesser though still impactful accretions of freezing rain and sleet (with snow possible northern MA). *Marine Headlines:* *Gale Warnings* for southern coastal offshore waters. In effect Monday 7 AM into early Tuesday. *Gale Watches* for eastern coastal and offshore waters. In effect Monday Night into Tuesday. =============================================== *Main Weather Concerns: * 1) *Higher Elevation Significant Icing in* *western MA (eastern slopes of the Berkshires) and north-central MA (Worcester County hills into northwest Middlesex County) developing tonight thru Monday night*. Icing is expected to begin in tonight and continue into Monday evening, with temperatures around 30 degrees. There is now high confidence in icing accumulations of a half-inch or greater in each area, with *local amounts up to one inch possible in the eastern slopes of the Berkshires where freezing rain is expected to predominate*. 2)* Lower Elevations: Lesser amounts of sleet and freezing rain develop tonight and continue through Monday. *Accumulations of freezing rain and sleet will affect the Monday morning commute. While freezing rain is still expected to continue across interior MA and northern CT for the afternoon commute, a wintry mix of sleet to rain is expected towards the MA East Coast. Icing amounts range from a light glaze to a quarter-inch, though *may locally be near a half-inch in spots N/W of I-84 and I-495 if freezing rain can remain more prolonged*. 3) A* brief period of snow* is possible at the end of the storm late Monday night into Tuesday, especially in northern Massachusetts near the New Hampshire border. Up to a couple inches of snow is expected in these areas. 4) *Strong east to northeast winds* are expected over the coastal waters and along the South Coast Monday night. Limited impact expected. =============================================== *Confidence...and what could still change:* We have high confidence that this storm system will occur and produce a wintry mix. Confidence has also increased on the potential for significant icing and impact in higher-elevation areas (e.g. those areas currently in Ice Storm and Winter Storm Warnings). Confidence on the distribution/duration of precipitation types is moderate outside of the two Ice Storm and Winter Storm Warning areas. This may result in further significant change in snow/sleet and ice accumulations - especially across northeast MA, southern interior MA on into northern CT. Supporting graphics are attached, including the current Winter headlines, Storm Total Icing, Onset, peak wind gusts tonight into Monday afternoon (e.g. period when icing is greatest), and peak wind gusts for Monday evening. Meteorologists: Andrew Loconto and Frank Nocera If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2019.12.28 PM] NWS Boston EM Briefing CORRECTION for Wintry Weather/Possible Ice Event Sunday night through Tuesday morning
by BOX Operations - NOAA Service Account 28 Dec '19

28 Dec '19

Hello again everyone. This is just a brief correction to the Icing graphic that was sent to you earlier today. There is the potential of up to *0.75 inches of icin**g* across portions of the east slopes of the Berkshires from Sunday evening through Monday night. The potential for heaviest icing is forecast on Monday morning across the higher terrain of the Worcester Hills as well as the east slopes of the Berkshires. If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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[2019.12.28 PM] NWS Boston EM Briefing for Wintery Weather and possible Ice Event Sunday night through Tuesday morning
by BOX Operations - NOAA Service Account 28 Dec '19

28 Dec '19

Hi everyone, We continue to follow the potential storm that will be impacting our region Sunday night through Tuesday morning. This will be a complicated storm with a mix of precipitation types across Southern New England. *Changes with the New Forecast:* 1) The Winter Storm Watch will be expanded east to include Western Essex, Northwest and Western Middlesex in MA, and Northwest Providence and Western Kent Counties in RI. The starting time will be moved an hour earlier, to 6 PM. 2) A Gale Watch will be issued for the coastal waters, starting 7 AM Monday. The ending time will range from 2 AM Tuesday to 10 AM Tuesday. 3) We anticipate a Wind Advisory will eventually be needed for Cape Cod and the Islands for Monday, due to east-northeast wind gusts of 40 to 50 mph. *Main Weather Concerns: * 1) *Possible ice storm* in the *higher terrain of western MA (eastern slopes of the Berkshires) and central MA (Worcester County hills) developing Sunday night* and continuing through Monday night. Freezing rain is expected to begin in those areas Sunday evening and continue into Monday evening, with temperatures around 30 degrees. Cannot rule out some freezing rain in northern CT as well. There is uncertainty at this time as to amounts, but current projections are for between 0.25 and 0.50 inches of ice accretion in the slopes of the Berkshires and Worcester hills. There is some potential for greater than 0.50 inches. 2)* Lower amounts of sleet and freezing rain develop Sunday night and continue during the morning commute on Monday. * Sleet and freezing rain continue late Monday in Northern Massachusetts. Mainly rain is expected along the coast during the storm, as well as south of the Mass Pike after Monday morning. 3) A* brief period of snow* is possible at the start of the storm, especially in northern Massachusetts near the New Hampshire border. Any snow is expected to be short-lived and turning over to sleet and rain Sunday night into Monday. 4) *Strong east to northeast winds* are expected over the coastal waters and along the South Coast Monday and Monday night. Expect sustained winds of 25 to 30 kt/30 to 35 mph, and gusts of 35 to 40 kt/40 to 50 mph. *Confidence...and what could still change:* We have high confidence that this storm system will occur and produce a wintry mix, but still low to moderate confidence on amounts and distribution of precipitation types. A colder scenario than currently forecast would mean less freezing rain and possibly significantly more sleet and/or snow in northeastern MA. The potential exists for higher freezing rain totals in the high terrain of western and central MA, which, if true, could lead to power outages and downed trees/wires. Stay tuned for the latest information. If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>

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