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

[2019.12.02 530 AM] NWS Boston EM Briefing: Weather Hazards Today Thru Early Tuesday
by BOX Operations - NOAA Service Account 02 Dec '19

02 Dec '19

Good morning everyone, Here is our latest thinking on the second half of the ongoing winter storm. *Watches/Warnings/Advisories:* NEW: 1) *Winter Weather Advisory* expanded to include Washington, Kent, SW Providence, Bristol, and Newport counties in RI; Bristol and Plymouth counties in MA 2) *Wind Advisory *for Cape Cod, Nantucket, and Martha's Vineyard through 1 PM. 3) *Coastal Flood Advisory* for eastern Essex and Plymouth counties and Nantucket this afternoon *What we expect:* *Today into early Tuesday* - Continued/ongoing snow in interior western/central MA will spread into eastern MA, northern CT and RI tonight. Lighter, more manageable snows expected in central and western MA and northern CT/RI. However, snow is expected to increase in intensity tonight into Tuesday across eastern and northeast MA, with 1-2"/hr snowfall rates possible in these areas. - Impacts to the Tuesday morning commute are possible. *Winds and Minor Coastal Flood Potential:* - Winds will gust to 40-50 mph along coastal areas, with the highest gusts over Cape Ann, outer Cape Cod, and the coastal waters off eastern MA. - Storm surges of up to 2 feet are expected, but astronomical tides are low. A Coastal Flood Advisory has been issued for up to a foot of inundation above ground level possible for Eastern Essex, Eastern Plymouth, and Nantucket. *Storm Total Accumulations:* - In today's briefing we are showing only new snow expected today into Tuesday. We expect an additional 3-6 inches across the interior high terrain during the day today. By Tuesday morning interior locations can expect a Monday/Tuesday total of 8-12" with lesser amounts to the south and east. The heaviest snow may come Tuesday morning over far eastern MA. *Confidence* : - Confidence is moderately high for this second round of heavy snow Monday night/Tuesday period in eastern MA. How far west these snowbands extend is still uncertain, which could affect who sees those highest snowfall totals. -- Bryce Williams and 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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[2019.12.01 530 PM] NWS Boston EM Briefing: Weather Hazards Tonight thru early Tuesday
by BOX Operations - NOAA Service Account 01 Dec '19

01 Dec '19

Good evening everyone, Here is our latest thinking on the upcoming significant winter storm just beginning to affect Southern New England, continuing to do so through early Tuesday. *Watches/Warnings/Advisories:* 1) NEW: Winter Storm Warning expanded to include Western Essex, Southeast Middlesex and Eastern Hampshire counties in MA for this evening. *What we expect:* *Changes:* Increased snow and ice amounts. Stressing two rounds of heavy snow: tonight into overnight interior MA/northernmost CT, and Monday night into Tuesday eastern/northeast MA. Other than western and central MA where lighter snows are expected to continue, mostly rain is expected elsewhere through late afternoon Monday. *Tonight into early Monday* - Snow becomes heavy at times (1"/hour) shortly after onset and continues into the evening hours. - Precipitation changes to sleet and freezing rain in northern CT, RI, to a sleet/snow mix in northern MA, and to plain rain in southern RI and southeast MA for the overnight hours. - By daybreak Monday, snow/sleet accumulations of 6-8" possible in western and northern MA with approximately 4-6" in Springfield and interior Essex County, with 2-5" elsewhere (including MetroWest Boston), except less than an inch on Cape Cod/Islands and near the immediate coast in southeast MA and southern RI. - The snow will be very moisture-laden. This could make for compact snow but it will be heavy to shovel. - Wind gusts will increase to 25-40 mph along the south coast late Sunday night. *Monday Night into early Tuesday* - Continued/ongoing snow in interior western/central MA will spread into eastern MA, northern CT and RI Monday night. Lighter, more manageable snows expected in central and western MA and northern CT/RI. However, snow is expected to increase in intensity Monday night into Tuesday across eastern and northeast MA, with 1"/hr snowfall rates possible in these areas. - Impacts to the Tuesday morning commute are possible. *Winds and Minor Coastal Flood Potential:* - Winds will gust to 35-45 mph along coastal areas, with the highest gusts over Cape Ann, outer Cape Cod, and the coastal waters off eastern MA. - Storm surges of up to 2 feet are expected, but due to low astronomical tides, only splashover is expected for east coastal MA, including Cape Cod Bay and Nantucket (with northeast winds). Will keep a close eye on this as some pockets on minor coastal flooding cannot be ruled out. *Storm Total Accumulations:* - We are still expecting a widespread 8 to 12 inches over much of interior MA with as much as a foot possible in the higher Worcester hills and 12 to 17 inches in the east slopes of the Berkshires and into areas near/north of Route 2 into northeast MA. These snow amounts are for both periods of heavy snow combined. Amounts drop off rapidly as one heads southeast, with 3 to 5 inches from southern Hartford County eastward to Providence and Plymouth and less than an inch on Cape Cod and the Islands. *Confidence* : - Confidence is highest in the warning areas of western and northern MA, where >6" of snow in a 12 hour period or 8" in a 24 hour period is likely. Confidence decreases moving into I-495 and towards the coast, where east winds contributing to temperatures near or just above freezing become offset by heavy precipitation rates. - Confidence is moderately high for the second round of heavy snow Monday night/Tuesday period in eastern MA. How far west these snowbands extend is uncertain, which could affect snowfall totals in the Monday night to Tuesday period. -- Andrew Loconto/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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[2019.12.01 530 AM] NWS Boston EM Briefing: Weather Hazards for Sunday thru early Tuesday
by BOX Operations - NOAA Service Account 01 Dec '19

01 Dec '19

Good morning everyone, Here are our latest thoughts on the upcoming significant winter storm impacting southern New England this afternoon through early Tuesday. *Watches/Warnings/Advisories:* 1) NEW: Winter Storm Warning now includes Western Hampden, Western Hampshire, all of Franklin, northern Worcester, and northern/central Middlesex counties in MA. 2) NEW: Winter Weather Advisory now includes Hartford, Tolland, and Windham counties in CT; northwest Providence County in RI; Norfolk, eastern Hampden, eastern Hampshire, southern Worcester, Suffolk, southeast Middlesex, and Essex counties in MA. 3) NEW: Gale Warning now in effect for all coastal waters from this afternoon through Monday afternoon/night. *What we expect:* Changes: Slightly lower snowfall totals from our last update and slower onset time today. *Sunday into early Monday* - Slower onset. Snow will begin in western MA between 2 and 3 PM Sunday; CT Valley and central MA 3-4 PM Sunday; and eastern MA 4-6 PM. - Snow becomes heavy at times (1"/hour) shortly after onset and continues into the evening hours. - As warmer air intrudes aloft, precipitation changes to sleet and freezing rain in northern CT, RI, to a sleet/snow mix in northern MA, and to plain rain in southern RI and southeast MA for the overnight hours. - By daybreak Monday, snow/sleet accumulations of 6-8" possible in western and northern MA with approximately 4-6" in Springfield and interior Essex County, with 2-5" elsewhere, except less than an inch on Cape Cod/Islands and near the immediate coast in southeast MA and southern RI. - The snow will be very moisture-laden. This could make for compact snow but it will be heavy to shovel. - Wind gusts will increase to 25-40 mph along the south coast late Sunday night. *Monday into early Tuesday* - Early in the morning, rain will be occurring in RI, portions of northern CT and much of eastern MA, with a mixed bag elsewhere. However, everything will change back to snow from west to east. The changeover will reach as far east as northeast MA, central MA, and northern CT by early to mid afternoon. It will reach RI and eastern MA (except Cape Cod/Islands) by mid afternoon into the late evening. The snow will likely continue into early Tuesday morning. Less snow is expected than what occurred on the front end Sunday, but there still could be several inches in some locations. This may be dependent on where localized bands of heavier snow set up. - Winds will gust to 35-45 mph along coastal areas, with the highest gusts over Cape Ann, outer Cape Cod, and the coastal waters off eastern MA. - Storm surges of up to 2 feet are expected, but due to low astronomical tides, only splashover is expected for east coastal MA, including Cape Cod Bay and Nantucket (with northeast winds). Will keep a close eye on this as some pockets on minor coastal flooding cannot be ruled out. *Storm Total Accumulations:* - We are still expecting a widespread 8 to 10 inches over much of interior MA with as much as a foot possible in the higher Worcester hills and 12 to 17 inches in the east slopes of the Berkshires. Amounts drop off rapidly as one heads southeast, with 3 to 5 inches from southern Hartford County eastward to Providence and Plymouth and less than an inch on Cape Cod and the Islands. *Confidence* : - Confidence is highest in the warning areas of western and northern MA, where >6" of snow in a 12 hour period or 8" in a 24 hour period is likely. - Our lowest confidence is in southeast sections, particularly along the I-95 corridor. This could be a situation in which there is a sharp snowfall gradient within the city of Boston, with only a slushy inch or two at the immediate coast to warning criteria amounts in western Suffolk County. -- Matt Belk/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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