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[2019.12.13 AM] NWS Boston EM Briefing: Heavy rain late tonight & Saturday, Strong winds Saturday
by BOX Operations - NOAA Service Account 13 Dec '19

13 Dec '19

Good morning. Heavy rainfall will impact the region late tonight through Saturday. A Flood Watch is in effect for central and eastern areas where the heaviest rainfall is expected. Cold air in place across the higher inland terrain as well as the Connecticut Valley, so could see the precipitation start as light freezing rain and/or drizzle, which may cause a thin glaze of ice on untreated roads during this evening's commute. Once the low pressure area that is causing the rain and potential slippery travel conditions today, gusty winds will move in across the region Saturday, strongest across Cape Cod and the islands. *Interior Light Icing:* *Locations*: Across the east slopes of the Berkshires and the Connecticut River Valley in Massachusetts. *Timing:* May see freezing drizzle and/or light freezing rain develop as the precipitation starts late this afternoon. Temperatures will slowly rise tonight, so should see the changeover to rain by midnight. *Amounts*: Trace amounts to a couple hundredths of an inch resulting in a light, thin glaze of ice. *Impact*: Slick roads impacting travel during the evening commute through about midnight. *Confidence:* Low. Expect patchy coverage of freezing drizzle and light freezing rain. *Heavy Rain:* *Locations*: All locations. *Timing:* Late tonight into Saturday evening. Heaviest rain from after midnight tonight through midday Saturday. *Amounts*: 1 to 2 inches across Western MA and CT. 2 to 2.5 inches across RI as well as central and eastern MA. May see local amounts up to around 3 inches. *Impact*: Combination of snow melt and heavy rain may result in localized flooding, especially in areas with poor drainage. *Confidence:* High. *Strong Winds:* *Locations*: Cape Cod, Nantucket and Martha's Vineyard. *Timing*: From 8 AM through 4 PM on Saturday. *Wind Speeds*: South winds 15 to 30 mph with gusts up to 50 mph. *Impact*: Tree limbs may be blown down, a few power outages are possible. Unsecured objects may be blown around. *Confidence*: High. Please see the attached graphics for the flood watch, the forecast rainfall total and wind gusts. Eleanor Vallier-Talbot 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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[2019.12.12 PM] NWS Boston EM Briefing: Heavy rain on Saturday
by BOX Operations - NOAA Service Account 12 Dec '19

12 Dec '19

Good afternoon, We are expecting a heavy rain event to impact the region late Friday night into Saturday. Precipitation might start off as a bit of freezing rain in the interior high elevations and parts of the CT River valley, but any icing impact will be transient as temperatures warm well above freezing overnight on Friday. *Interior Light Icing:* *Locations*: East slopes of the Berkshires and CT River valley in MA. *Timing:* Spotty freezing drizzle and/or very light freezing rain developing during precipitation onset. Changeover to rain by midnight. *Amounts*: Trace amounts to a couple hundredths of an inch resulting in a light, thin glaze of ice. *Impact*: Slick roads impacting Friday night's travel. *Confidence:* Low. Coverage of freezing drizzle and light freezing rain will be spotty/patchy. *Heavy Rain:* *Locations*: All locations. *Timing:* Late Friday night into Saturday evening. Heaviest between Saturday morning and afternoon. *Amounts*: 0.75 to 1.5 inches in Western MA and CT. 1 to 2 inches in Eastern MA and RI. *Impact*: Combination of snowmelt and heavy rain could result in localized flooding, especially in areas with poor drainage. *Confidence:* High. A storm total rainfall graphic is attached. Please let us know if you have any questions or concerns. This email will be updated as needed. Meteorologist: Rodney Chai and 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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[2019.12.11 AM] NWS Boston EM Briefing: Accumulating Snow Hazards Today
by BOX Operations - NOAA Service Account 11 Dec '19

11 Dec '19

Good morning. Here is the latest for the snowfall we are expecting today. *Changes on this Update:* - *Added north central & NE Massachusetts as well as Martha's Vineyard to the Winter Weather Advisory* *What to Expect and When:* - Steady light to occasionally moderate snow will continue away from the S coast through mid morning across most of the region - Light rain along south coastal RI and Massachusetts will change over to snow by around 8 AM as the colder air works in - Pockets of moderate intensity snowfall remain possible across portions of eastern Mass, Rhode Island, NE Connecticut and toward the lower and mid Cape through this morning's commute with slick spots and snow covered roadways - The snow will taper off from N central to NW Massachusetts by mid to late morning, then will shift toward the south coast during this afternoon *Impacts*: - Expect slow travel on snow covered roads, especially across back roads and overpasses through this morning's commute *Accumulations*: - Should see 1 to 2 inches of snow across western Massachusetts before tapering off around mid morning - Snow up to 2 to 4 inches expected further east, from N CT and central Massachusetts east to the coast before tapering off late this morning through early afternoon Attached please find the forecast snow totals for this event. A map with the updated Winter Weather Advisories is also included. Eleanor Vallier-Talbot 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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[2019.12.10 PM] NWS Boston EM Briefing: Accumulating Snow Hazards Late Tonight Into Wed
by BOX Operations - NOAA Service Account 10 Dec '19

10 Dec '19

Good afternoon, Following is an updated briefing on the expected changeover from rain to accumulating snow expected to affect parts of southern New England late tonight into the first part of Wednesday. *Changes with this update:* - Minor adjustments to start time and storm total accumulations. *No changes to headlines.* *What To Expect and When: * - Rain will change to snow from NW to SE late tonight into early Wednesday. The attached Onset graphic provides an approximate start time to the changeover to snow. - Steady light snows are expected to fall across most of southern New England into Wednesday, but steadier moderate-intensity snows are possible towards eastern CT, RI, SE Mass into Cape Cod by the Wednesday AM commute. - Snow is expected to decrease in intensity through noontime before ending across the South Coast by Wednesday early afternoon. *Accumulations:* A general inch to 4 inches, greatest amounts south/east. While less likely, a reasonable worst-case snowfall accumulation is attached. This gives a sense of what may happen if the axis of heaviest snows shifts N/W and/or if narrow bands were to organize. *Impacts: * - Wet pavement from recent rains may freeze before or during the period of snow, resulting in slick roads. - Snow may be enough to shovel and plow by Wednesday morning, especially areas S/E of I-95. - Difficult travel for the Wednesday morning commute. *Forecast Confidence: *Moderate to high. The band of heaviest snow accumulations may shift N/W toward a larger part of the I-95 corridor S of Boston. Snow may organize into narrow bands that could result in heavier snowfall rates; where these bands set up is not clear. Attached graphics include the current Hazards in effect, an Onset graphic which shows approximately when rain may change to snow, the updated official storm total snow forecast, and a reasonable worst-case snow accumulation forecast. 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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[2019.12.10 AM] NWS Boston EM Briefing: Accumulating Snow Hazards Tonight through Wednesday
by BOX Operations - NOAA Service Account 10 Dec '19

10 Dec '19

Good morning. Here is the updated information on the winter weather event that will affect the region tonight through most of Wednesday: *HEADLINES*: A *Winter Weather Advisory has been issued for interior south central Massachusetts, most of Rhode Island and northern Connecticut for tonight through midday Wednesday*. This will be when the steadiest snow will fall across these areas. *WHAT TO EXPECT AND WHEN*: Rain will start across western areas this afternoon, then will push across the remainder of the region through this evening. As colder air works in tonight, the rain will change to snow from west to east, reaching most of the south coast by daybreak Wednesday. The snow and/or sleet will reach Cape Cod and the islands Wednesday morning. *WHERE: * Accumulating snow is expected for all of Massachusetts, Rhode Island into northern Connecticut, except the islands. The best chance will occur across *IMPACTS*: - The snow will likely result in snow covered roads for the Wednesday morning commute. - Snow amounts may be enough to shovel and plow by Wednesday morning. - Wet roads may linger into tonight and, as the colder temperatures move in, may result in any leftover moisture freezing on untreated roads causing icy spots. *FORECAST CONFIDENCE*: Our current thinking is the band of higher accumulating snow mainly south of the Mass Pike into northern Connecticut, most of Rhode Island and interior S central Mass. However, this band could shift a bit north or south as we get closer to the changeover tonight. Please monitor updates to our forecasts and any changes to our winter weather headlines through the remainder of the day and into tonight. Attached please find the latest forecast snow accumulation and the location of the Winter Weather Advisory. Eleanor Vallier-Talbot 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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[2019.12.09 PM] NWS Boston EM Briefing: Accumulating Snow Hazards Thru Wed
by BOX Operations - NOAA Service Account 09 Dec '19

09 Dec '19

All, Here is our latest thinking regarding *accumulating snow potential* Tuesday night into Wednesday. *What ...* accumulating snow, potential snow covered roads impacting the Wednesday morning commute *Where ..*. risk for accumulating snow is for all of Massachusetts, Rhode Island into northern Connecticut *When ..*. rain changes to snow Tuesday evening across northwest Massachusetts with the rain-snow line advancing southward Tuesday night across the remainder of Massachusetts, Rhode Island and northern Connecticut overnight. *Impacts ...* accumulating snow may result in snow covered roads for the Wednesday morning commute. Snow amounts may be enough to shovel and plow by Wednesday morning. In addition wet roads Tuesday combined with falling temps Tuesday night may result in any residual moisture freezing causing icy spots. *Forecast Confidence ...* very low as this will likely be a narrow band of accumulating snow and is difficult at this time range to predict exactly where the heaviest amounts will occur. A shift in this snow band as little as 50 miles could result in most of the snow falling along the south coast or just offshore, while a 50 mile shift farther inland could result in the heaviest snow impacting much of MA, RI and CT. It's just too early to say with any certainty at this time range. However our attached maps communicate three possible scenarios - *1) Storm Total Snow* - most likely scenario 1-4" of snow across much of MA, RI and CT *2) Snow Amount 10% Percentile* - a 90% chance of at least a coating to an inch of snow for most of the region *3) Snow Amount 90% Percentile* - a 10% chance of 6-8" of snow somewhere across MA/RI/CT Keep in mind the axis of heaviest snow shown in these images is expected to change in later forecasts given the event is still 36-48 hours away. Frank Nocera & Rodney Chai 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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NWS Boston EM Briefing: Rain and Accumulating Snow Hazards Through Wednesday
by BOX Operations - NOAA Service Account 09 Dec '19

09 Dec '19

Good Morning, This is an update to yesterday afternoon's email on potential weather hazards today through Wednesday. Overall, little has changed aside from a slight increase in snowfall amounts Wednesday. We have attached forecast graphics of rainfall totals through tonight as well as snow accumulations and an approximate rain-to-snow changeover time for Tuesday Night and Wednesday. *Today and Tonight: Rain (Heavy at Times)* Heavy rain later today and tonight will bring rainfall totals of 1 to 2 inches to much of southern New England with possibly as much as 3 inches in a few locations near the South Coast. In addition, unseasonably mild temperatures in the 50s will lead to significant snow melt. The combination of rain and snowmelt is not forecast to result in flooding of rivers or streams. However, minor urban and poor drainage nuisance flooding is possible especially where storm drains are clogged. Areas of standing water from rain and snowmelt will affect the evening commute. *Confidence:* High. Heaviest rains are expected to the south of where snowpack is greatest, and it would take heavier rainfall further to the north to produce a greater flood threat, which is unlikely at this time. *Tuesday Night into Wednesday*: *Accumulating Snow* Rain will change to snow late Tuesday night into Wednesday morning. Snow is expected to end by Wednesday afternoon. Much of southern New England should see a plowable snowfall, with the exception of Cape Cod and the Islands and perhaps the immediate South Coast. As temperatures fall during the night, wet pavement may freeze and become slick. This may result in slow travel into the Wednesday morning commute. *Confidence: *Moderate. The axis of heaviest snowfall remains in question, which could alter snowfall totals (up or down) on the northwestern or southeastern end. Changeover timing is approximate and will depend on how quickly colder air advances southeast. **Note:* Please consider the snow accumulation and onset time graphics as *preliminary* and are subject to further adjustments. Meteorologists: Joe DelliCarpini and Eleanor Vallier-Talbot 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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[2019.12.08 4 PM] NWS Boston EM Briefing: Rain and Accumulating Snow Hazards Thru Wednesday
by BOX Operations - NOAA Service Account 08 Dec '19

08 Dec '19

Good afternoon, We wanted to bring to your attention a couple of periods through Wednesday that we are watching for possible weather-related impacts. *Late Monday into Monday Night: Rain (Heavy at Times)* A period of heavy rain is forecast for later Monday into Monday night. Rain amounts between about an inch to up to 2 inches, wettest mainly south of Interstate 90. As temperatures will be unseasonably mild into the 50s on Monday and upper 40s to near 50 on Monday night, existing snowpack across northern CT into MA will be melting. The combination of rain and snowmelt should result in within-bank rises on area rivers and streams. Minor urban and poor drainage nuisance flooding is possible especially where storm drains are clogged. Areas of standing water from rain and/or snowmelt for the Monday evening commute could result in hydroplaning. *Confidence:* High. Heaviest rains are expected south of where snowpack is greatest, and it would take even heavier rainfall further to the north to produce a greater flood threat. *Tuesday Night into Wednesday*: *Accumulating Snow* Rain will change over to a period of accumulating snows overnight into the first part of Wednesday. Snow is expected to end by Wednesday afternoon. The potential exists for plowable snowfall across interior MA (to I-95) and northern parts of CT and RI Tuesday night into the first part of Wednesday. As temperatures fall, wet pavement from rains Monday into early Tuesday may freeze and become slick before or during the period of accumulating snow. This may result in difficult travel into the Wednesday morning commute. *Confidence: *Moderate to high on impact potential, though moderate on snow accumulations & changeover time. The axis of heaviest snowfall remains in question, which could alter snowfall totals (up or down) on the northwestern or southeastern end. The potential for snowfall rates at or over 1"/hr is uncertain. Changeover timing is approximate and will depend on how quickly colder air advances southeast. Following graphics are rainfall accumulations through Tuesday morning, a first look at snow accumulations and an approximate rain-to-snow changeover onset time for Tuesday Night and Wednesday. **Note:* Please consider the snow accumulation and onset time graphics as *preliminary* and are subject to further adjustments. 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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[2019.12.03 AM] NWS Boston EM Briefing: Weather Hazards Today
by BOX Operations - NOAA Service Account 03 Dec '19

03 Dec '19

Good morning everyone, Changes this morning: 1. Coastal Flood Advisory in effect this morning for Nantucket. 2. Gale Warning times have been extended. Hazards: 1. Accumulating snow, and potential for poor travel in unplowed/untreated locations. 2. Strong winds coming out of the north and northwest. Wind gusts to 35 mph inland and 45 to 50 mph Cape and Islands. 3. Coastal flooding on Nantucket, with inundation up to one foot above ground level along the shorelines. A band of heavy snow fell from Nashua NH through Worcester and Springfield MA to Hartford and Willimantic CT early this morning. This is now shifting east across Eastern MA and RI. This band produced snowfall rates up to 2 inches per hour during the night. By early afternoon the bulk of the precipitation will be offshore, except for some leftover light rain and light snow in Eastern MA. Please see attached graphics for wind and snow for today. 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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[2019.12.02 10 PM] NWS Boston EM Briefing: Weather Hazards Thru Early Tuesday
by BOX Operations - NOAA Service Account 02 Dec '19

02 Dec '19

...previously wasn't sent from the BOX.Operations account -- sorry!... Good evening everyone, Just a quick update... No changes to warnings. We have lowered expected snowfall totals just a tad based on some of the latest model information. Still have high confidence of 4 inches in eastern MA with areas of 6 to 8 inches possible. A slight shift to the west of the track of the storm could mean higher totals and a slight shift more offshore would mean lower totals. During the past two hours, four inches have fallen in a very heavy band over Windsor Locks, CT. The potential for similar banding exists toward daybreak in eastern MA. If a heavy band were to occur there, it would most likely be between 4 AM and 10 AM. Please see attached snow total graphic, from 7 PM this evening to 7 PM tomorrow evening. -- Glenn Field Warning Coordination Meteorologist NWS - Boston/Norton, MA 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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