December 2019 - Weather - mailman.dca2.superb.net

[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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[2019.12.02 10 PM] NWS Boston EM Briefing: Weather Hazards Thru Early Tuesday
by Glenn Field - NOAA Federal 02 Dec '19

02 Dec '19

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

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[2019.12.02 5 PM] NWS Boston EM Briefing: Weather Hazards Thru Early Tuesday
by BOX Operations - NOAA Service Account 02 Dec '19

02 Dec '19

Resending the briefing package to include the subject header. Good afternoon, Here is our latest thinking on the next phase of the winter storm. *Watches/Warnings/Advisories:* NEW: 1) *Winter Storm Warnings* expanded to include coastal Essex, Suffolk, Norfolk and Plymouth counties. 2) *Winter Weather Advisory* issued for Cape Cod 3) *Wind Storm Warnings converted to Advisories *for western and northern MA west of I-495 *What we expect:* *Tonight into Tuesday morning* - Rain changing to snow across eastern MA through this evening with changeover occurring on Cape Cod toward daybreak - Bands of heavy snow possible across much of eastern MA, especially from 4-10 am. Localized snowfall rates of 1-2"/hour possible - Significant impacts to morning commute across eastern MA *Strong Winds:* - Wind gusts to 40 mph expected along coastal areas, with the highest gusts over Cape Ann, outer Cape Cod, and the coastal waters off eastern MA. *Snow Accumulations:* - Additional accumulations after 7 pm tonight through Tuesday morning... - Generally 2-4 inches across much of the region, but up to 4-8 inches possible across eastern MA, especially from Boston north through Essex county and the Merrimack Valley. *Confidence* : - Moderate confidence in additional snowfall of 4 inches for eastern MA. Lower risk for up to 8 inches, especially north of Boston. - If storm tracks a bit further east than expected, lower snowfall amounts would be realized for eastern MA with max snowfall around 4 inches. - If storm tracks further west, 4-8 inches would impact a larger portion of eastern MA and possibly into northern RI, with locally higher amounts north of Boston. -- Kevin Cadima 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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(no subject)
by BOX Operations - NOAA Service Account 02 Dec '19

02 Dec '19

Good afternoon everyone, Here is our latest thinking on the next phase of the winter storm. *Watches/Warnings/Advisories:* NEW: 1) *Winter Storm Warnings* expanded to include coastal Essex, Suffolk, Norfolk and Plymouth counties. 2) *Winter Weather Advisory* issued for Cape Cod 3) *Wind Storm Warnings converted to Advisories *for western and northern MA west of I-495 *What we expect:* *Tonight into Tuesday morning* - Rain changing to snow across eastern MA through this evening with changeover occurring on Cape Cod toward daybreak - Bands of heavy snow possible across much of eastern MA, especially from 4-10 am. Localized snowfall rates of 1-2"/hour possible - Significant impacts to morning commute across eastern MA *Strong Winds:* - Wind gusts to 40 mph expected along coastal areas, with the highest gusts over Cape Ann, outer Cape Cod, and the coastal waters off eastern MA. *Snow Accumulations:* - Additional accumulations after 7 pm tonight through Tuesday morning... - Generally 2-4 inches across much of the region, but up to 4-8 inches possible across eastern MA, especially from Boston north through Essex county and the Merrimack Valley. *Confidence* : - Moderate confidence in additional snowfall of 4 inches for eastern MA. Lower risk for up to 8 inches, especially north of Boston. - If storm tracks a bit further east than expected, lower snowfall amounts would be realized for eastern MA with max snowfall around 4 inches. - If storm tracks further west, 4-8 inches would impact a larger portion of eastern MA and possibly into northern RI, with locally higher amounts north of Boston. -- Kevin Cadima 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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