Alert archive / Massachusetts / Winter Weather Advisories in 2021
Winter Weather Advisory 8, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this winter weather advisory at Feb 6, 2021, 3:27 PM EST for 10 counties in Massachusetts; Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; Washington County, Rhode Island. It took effect at Feb 7, 2021, 7:00 AM EST. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Feb 6, 2021, 3:27 PM EST (20:27 UTC)
- In effect from
- Feb 7, 2021, 7:00 AM EST
- Expired
- Feb 7, 2021, 9:34 PM EST
- In force
- 15 hr
- Issued by
- NWS Boston/Norton, MA
Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT, Dukes County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Nantucket County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Washington County, RI
The radar
The Boston radar (KBOX), 42 km from the middle of the area, began a volume at 20:30 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Chatham, MA (KCHH), launched 12:00Z, 8.5 hours before the alert went out and 144 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1272 m above ground
- 0-6 km bulk shear
- 102 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
426 WWUS41 KBOX 062027 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 327 PM EST Sat Feb 6 2021 MAZ023-RIZ008-070830- /O.CAN.KBOX.WS.W.0003.210207T1200Z-210208T0600Z/ /O.NEW.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Dukes MA-Block Island RI- Including the cities of Vineyard Haven and New Shoreham 327 PM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... ...WINTER STORM WARNING IS CANCELLED... * WHAT...Snow expected. Total snow accumulations of up to 6 inches. Winds gusting as high as 40 mph. * WHERE...In Massachusetts, Dukes MA County. In Rhode Island, Block Island RI County. * WHEN...From 7 AM Sunday to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ CTZ003-004-MAZ004>007-012>016-026-RIZ001-070830- /O.UPG.KBOX.WS.A.0003.210207T1200Z-210208T0600Z/ /O.EXA.KBOX.WS.W.0003.210207T1200Z-210208T0600Z/ Tolland CT-Windham CT-Northern Worcester MA-Central Middlesex MA- Western Essex MA-Eastern Essex MA-Southern Worcester MA- Western Norfolk MA-Southeast Middlesex MA-Suffolk MA- Eastern Norfolk MA-Northern Middlesex MA-Northwest Providence RI- Including the cities of Union, Vernon, Putnam, Willimantic, Barre, Fitchburg, Framingham, Lowell, Lawrence, Gloucester, Milford, Worcester, Foxborough, Norwood, Cambridge, Boston, Quincy, Ayer, Foster, and Smithfield 327 PM EST Sat Feb 6 2021 ...WINTER STORM WARNING IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Heavy wet snow expected. Total snow accumulations of 5 to 8 inches. * WHERE...Portions of northern Connecticut, central, eastern and northeastern Massachusetts and northern Rhode Island. * WHEN...From 7 AM Sunday to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Rain may mix in at times, especially near the immediate coast. Snowfall rates could reach 1 to 2 inches per hour at times during the afternoon hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ017>022-RIZ002>007-070830- /O.CON.KBOX.WS.W.0003.210207T1200Z-210208T0600Z/ Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Bristol RI-Washington RI-Newport RI- Including the cities of Taunton, Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, Providence, Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, and Newport 327 PM EST Sat Feb 6 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Heavy wet snow expected. Total snow accumulations of 5 to 9 inches, except for the Outer Cape where only 1 to 3 inches of snow are expected. Winds gusting as high as 40 mph. * WHERE...Portions of southeastern Massachusetts as well as central and southern Rhode Island. * WHEN...From 7 AM Sunday to 1 AM EST Monday. Heaviest snow is expected Sunday afternoon with 1 to 2 hour snowfall rates possible at times. * IMPACTS...Travel will be very difficult. * ADDITIONAL DETAILS...Rain may mix in at times, especially near the immediate coast and over Cape Cod. The Outer Cape is expected to see mostly rain. Snowfall rates could reach 1 to 2 inches per hour at times during the afternoon hours where mixing doesn't occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ024-070830- /O.UPG.KBOX.WS.A.0003.210207T1200Z-210208T0600Z/ /O.NEW.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Nantucket MA- Including the city of Nantucket 327 PM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Wintry mix of rain and snow expected. Total snow accumulations of up to one inch. Winds gusting as high as 50 mph. * WHERE...Nantucket MA County. * WHEN...From 7 AM Sunday to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ CTZ002-MAZ008>011-070830- /O.UPG.KBOX.WS.A.0003.210207T1200Z-210208T0600Z/ /O.NEW.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Hartford CT-Western Hampshire MA-Western Hampden MA- Eastern Hampshire MA-Eastern Hampden MA- Including the cities of Hartford, Windsor Locks, Chesterfield, Blandford, Amherst, Northampton, and Springfield 327 PM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 6 inches. * WHERE...In Connecticut, Hartford CT County. In Massachusetts, Western Hampshire MA, Western Hampden MA, Eastern Hampshire MA and Eastern Hampden MA Counties. * WHEN...From 7 AM Sunday to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snowfall rates could reach 1 to 2 inches per hour at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ MAZ002-003-070830- /O.NEW.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Western Franklin MA-Eastern Franklin MA- Including the cities of Charlemont, Greenfield, and Orange 327 PM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 6 inches. * WHERE...Western Franklin MA and Eastern Franklin MA Counties. * WHEN...From 7 AM Sunday to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...Snowfall rates could reach 1 to 2 inches per hour at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$
8 follow-up statements
150 WWUS41 KBOX 070242 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 942 PM EST Sat Feb 6 2021 MAZ017>022-RIZ002>007-071045- /O.CON.KBOX.WS.W.0003.210207T1200Z-210208T0600Z/ Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Bristol RI-Washington RI-Newport RI- Including the cities of Taunton, Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, Providence, Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, and Newport 942 PM EST Sat Feb 6 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Heavy wet snow expected. Total snow accumulations of 5 to 9 inches, except for the Outer Cape where only 1 to 3 inches of snow are expected. Winds gusting as high as 40 mph. * WHERE...Portions of southeastern Massachusetts as well as central and southern Rhode Island. * WHEN...From 7 AM Sunday to 1 AM EST Monday. Heaviest snow is expected Sunday afternoon with 1 to 2 hour snowfall rates possible at times. * IMPACTS...Travel will be very difficult. * ADDITIONAL DETAILS...Rain may mix in at times, especially near the immediate coast and over Cape Cod. The Outer Cape is expected to see mostly rain. Snowfall rates could reach 1 to 2 inches per hour at times during the afternoon hours where mixing doesn't occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ CTZ003-004-MAZ004>007-012>016-026-RIZ001-071045- /O.CON.KBOX.WS.W.0003.210207T1200Z-210208T0600Z/ Tolland CT-Windham CT-Northern Worcester MA-Central Middlesex MA- Western Essex MA-Eastern Essex MA-Southern Worcester MA- Western Norfolk MA-Southeast Middlesex MA-Suffolk MA- Eastern Norfolk MA-Northern Middlesex MA-Northwest Providence RI- Including the cities of Union, Vernon, Putnam, Willimantic, Barre, Fitchburg, Framingham, Lowell, Lawrence, Gloucester, Milford, Worcester, Foxborough, Norwood, Cambridge, Boston, Quincy, Ayer, Foster, and Smithfield 942 PM EST Sat Feb 6 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Heavy wet snow expected. Total snow accumulations of 5 to 8 inches. * WHERE...Portions of northern Connecticut, central, eastern and northeastern Massachusetts and northern Rhode Island. * WHEN...From 7 AM Sunday to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Rain may mix in at times, especially near the immediate coast. Snowfall rates could reach 1 to 2 inches per hour at times during the afternoon hours. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ023-024-RIZ008-071045- /O.CON.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Dukes MA-Nantucket MA-Block Island RI- Including the cities of Vineyard Haven, Nantucket, and New Shoreham 942 PM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Snow expected. Total snow accumulations of up to 6 inches. Winds gusting as high as 40 mph. * WHERE...In Massachusetts, Dukes MA County. In Rhode Island, Block Island RI County. * WHEN...From 7 AM Sunday to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ CTZ002-MAZ002-003-008>011-071045- /O.CON.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Hartford CT-Western Franklin MA-Eastern Franklin MA- Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA- Eastern Hampden MA- Including the cities of Hartford, Windsor Locks, Charlemont, Greenfield, Orange, Chesterfield, Blandford, Amherst, Northampton, and Springfield 942 PM EST Sat Feb 6 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 6 inches. * WHERE...In Connecticut, Hartford CT County. In Massachusetts, Western Hampshire MA, Western Hampden MA, Eastern Hampshire MA and Eastern Hampden MA Counties. * WHEN...From 7 AM Sunday to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snowfall rates could reach 1 to 2 inches per hour at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$
687 WWUS41 KBOX 070816 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 316 AM EST Sun Feb 7 2021 CTZ003-004-MAZ004>007-012>016-026-071630- /O.CAN.KBOX.WS.W.0003.210207T1200Z-210208T0600Z/ /O.EXA.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Tolland CT-Windham CT-Northern Worcester MA-Central Middlesex MA- Western Essex MA-Eastern Essex MA-Southern Worcester MA- Western Norfolk MA-Southeast Middlesex MA-Suffolk MA- Eastern Norfolk MA-Northern Middlesex MA- Including the cities of Union, Vernon, Putnam, Willimantic, Barre, Fitchburg, Framingham, Lowell, Lawrence, Gloucester, Milford, Worcester, Foxborough, Norwood, Cambridge, Boston, Quincy, and Ayer 316 AM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM THIS MORNING TO 1 AM EST MONDAY... ...WINTER STORM WARNING IS CANCELLED... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches. * WHERE...Portions of northern Connecticut and central, eastern and northeastern Massachusetts. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...Snow overspreads the region this morning and will continue through the afternoon. The snow may begin as a brief period of rain across eastern Massachusetts before changing to all snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ MAZ017>022-RIZ002>007-071630- /O.CON.KBOX.WS.W.0003.210207T1200Z-210208T0600Z/ Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Bristol RI-Washington RI-Newport RI- Including the cities of Taunton, Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, Providence, Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, and Newport 316 AM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 1 AM EST MONDAY... * WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 inches. Winds gusting as high as 40 mph. * WHERE...Portions of southeastern Massachusetts and northern and southern Rhode Island. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. Wet snow may result in isolated power outages if the higher amounts are realized. * ADDITIONAL DETAILS...Snow overspreads the region this morning and continues through the afternoon. The snow may begin as a brief period of rain before changing to snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ RIZ001-071630- /O.CON.KBOX.WS.W.0003.210207T1200Z-210208T0600Z/ Northwest Providence RI- Including the cities of Foster and Smithfield 316 AM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 1 AM EST MONDAY... * WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 inches. * WHERE...Northwest Providence RI County. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Wet snow may result in isolated power outages if the higher amounts are realized. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ023-024-RIZ008-071630- /O.CON.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Dukes MA-Nantucket MA-Block Island RI- Including the cities of Vineyard Haven, Nantucket, and New Shoreham 316 AM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 1 AM EST MONDAY... * WHAT...Wet snow expected. Total snow accumulations of 2 to 6 inches. Winds gusting as high as 50 mph. * WHERE...In Massachusetts, Dukes MA and Nantucket MA Counties. In Rhode Island, Block Island RI County. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Snow will begin as a period of rain this morning before changing to all snow during the afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ CTZ002-MAZ002-003-008>011-071630- /O.CON.KBOX.WW.Y.0008.210207T1200Z-210208T0600Z/ Hartford CT-Western Franklin MA-Eastern Franklin MA- Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA- Eastern Hampden MA- Including the cities of Hartford, Windsor Locks, Charlemont, Greenfield, Orange, Chesterfield, Blandford, Amherst, Northampton, and Springfield 316 AM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 1 AM EST MONDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 5 inches. * WHERE...Portions of northern Connecticut and western Massachusetts. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ Frank
213 WWUS41 KBOX 071609 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 1109 AM EST Sun Feb 7 2021 MAZ017>022-RIZ002>007-080015- /O.CON.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Bristol RI-Washington RI-Newport RI- Including the cities of Taunton, Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, Providence, Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, and Newport 1109 AM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 inches. Winds gusting as high as 40 mph. * WHERE...Portions of southeastern Massachusetts and northern and southern Rhode Island. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. Wet snow may result in isolated power outages if the higher amounts are realized. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ RIZ001-080015- /O.CON.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Northwest Providence RI- Including the cities of Foster and Smithfield 1109 AM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 inches. * WHERE...Northwest Providence RI County. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ023-024-RIZ008-080015- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Dukes MA-Nantucket MA-Block Island RI- Including the cities of Vineyard Haven, Nantucket, and New Shoreham 1109 AM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Wet snow expected. Total snow accumulations of 2 to 6 inches. Winds gusting as high as 50 mph. * WHERE...In Massachusetts, Dukes MA and Nantucket MA Counties. In Rhode Island, Block Island RI County. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ CTZ002>004-MAZ002>016-026-080015- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Hartford CT-Tolland CT-Windham CT-Western Franklin MA- Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA- Western Essex MA-Eastern Essex MA-Western Hampshire MA- Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA- Southern Worcester MA-Western Norfolk MA-Southeast Middlesex MA- Suffolk MA-Eastern Norfolk MA-Northern Middlesex MA- Including the cities of Hartford, Windsor Locks, Union, Vernon, Putnam, Willimantic, Charlemont, Greenfield, Orange, Barre, Fitchburg, Framingham, Lowell, Lawrence, Gloucester, Chesterfield, Blandford, Amherst, Northampton, Springfield, Milford, Worcester, Foxborough, Norwood, Cambridge, Boston, Quincy, and Ayer 1109 AM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches. * WHERE...Portions of northern Connecticut and central, eastern and northeastern Massachusetts. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$
201 WWUS41 KBOX 071815 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 115 PM EST Sun Feb 7 2021 MAZ013-015-016-080215- /O.UPG.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ /O.EXA.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Western Norfolk MA-Suffolk MA-Eastern Norfolk MA- Including the cities of Foxborough, Norwood, Boston, and Quincy 115 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow. Additional snow accumulations of 5 to 7 inches. 1 to 2 inches per hour snowfall rates possible this afternoon. * WHERE...Western Norfolk MA, Suffolk MA and Eastern Norfolk MA Counties. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on hazardous road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ023-080215- /O.UPG.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ /O.EXA.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Dukes MA- Including the city of Vineyard Haven 115 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow. Additional snow accumulations of 4 to 6 inches. 1 to 2 inches per hour snowfall rates possible this afternoon. Winds gusting as high as 40 mph. * WHERE...Dukes MA County. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on hazardous road conditions. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ017>022-RIZ001>007-080215- /O.CON.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA- Northwest Providence RI-Southeast Providence RI-Western Kent RI- Eastern Kent RI-Bristol RI-Washington RI-Newport RI- Including the cities of Taunton, Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, Foster, Smithfield, Providence, Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, and Newport 115 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 inches. 1 to 2 inches per hour snowfall rates possible this afternoon. Winds gusting as high as 40 mph. * WHERE...Portions of southeastern Massachusetts and northern and southern Rhode Island. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. Wet snow may result in isolated power outages if the higher amounts are realized. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ024-RIZ008-080215- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Nantucket MA-Block Island RI- Including the cities of Nantucket and New Shoreham 115 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Wet snow expected. Total snow accumulations of 2 to 6 inches. Winds gusting as high as 50 mph. * WHERE...In Massachusetts, Dukes MA and Nantucket MA Counties. In Rhode Island, Block Island RI County. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ CTZ002>004-MAZ002>012-014-026-080215- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Hartford CT-Tolland CT-Windham CT-Western Franklin MA- Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA- Western Essex MA-Eastern Essex MA-Western Hampshire MA- Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA- Southern Worcester MA-Southeast Middlesex MA- Northern Middlesex MA- Including the cities of Hartford, Windsor Locks, Union, Vernon, Putnam, Willimantic, Charlemont, Greenfield, Orange, Barre, Fitchburg, Framingham, Lowell, Lawrence, Gloucester, Chesterfield, Blandford, Amherst, Northampton, Springfield, Milford, Worcester, Cambridge, and Ayer 115 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches. * WHERE...Portions of northern Connecticut and central, eastern and northeastern Massachusetts. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$
769 WWUS41 KBOX 072112 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 412 PM EST Sun Feb 7 2021 MAZ017>023-RIZ001>007-080515- /O.CON.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA- Northwest Providence RI-Southeast Providence RI-Western Kent RI- Eastern Kent RI-Bristol RI-Washington RI-Newport RI- Including the cities of Taunton, Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, Vineyard Haven, Foster, Smithfield, Providence, Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, and Newport 412 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow expected. Additional snow accumulations of 1 to 4 inches through the early evening hours. Winds gusting as high as 40 mph. * WHERE...Portions of southeastern Massachusetts and northern and southern Rhode Island. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Travel could be very difficult. Wet snow may result in isolated power outages if the higher amounts are realized. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ013-015-016-080515- /O.CON.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Western Norfolk MA-Suffolk MA-Eastern Norfolk MA- Including the cities of Foxborough, Norwood, Boston, and Quincy 412 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow expected. Additional snow accumulations of 1 to 4 inches through the early evening hours. * WHERE...Western Norfolk MA, Suffolk MA and Eastern Norfolk MA Counties. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on hazardous road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ024-RIZ008-080515- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Nantucket MA-Block Island RI- Including the cities of Nantucket and New Shoreham 412 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Wet snow expected. Additional snow accumulations of up to 2 inches through the early evening hours. Winds gusting as high as 50 mph. * WHERE...In Massachusetts, Dukes MA and Nantucket MA Counties. In Rhode Island, Block Island RI County. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ CTZ002>004-MAZ002>012-014-026-080515- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Hartford CT-Tolland CT-Windham CT-Western Franklin MA- Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA- Western Essex MA-Eastern Essex MA-Western Hampshire MA- Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA- Southern Worcester MA-Southeast Middlesex MA- Northern Middlesex MA- Including the cities of Hartford, Windsor Locks, Union, Vernon, Putnam, Willimantic, Charlemont, Greenfield, Orange, Barre, Fitchburg, Framingham, Lowell, Lawrence, Gloucester, Chesterfield, Blandford, Amherst, Northampton, Springfield, Milford, Worcester, Cambridge, and Ayer 412 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Periods of snow. Additional snow accumulations of up to 2 inches through the early evening hours. * WHERE...Portions of northern Connecticut and central, eastern and northeastern Massachusetts. * WHEN...From 7 AM this morning to 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$
939 WWUS41 KBOX 072340 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 640 PM EST Sun Feb 7 2021 CTZ002>004-MAZ002>004-008>012-080045- /O.CAN.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Hartford CT-Tolland CT-Windham CT-Western Franklin MA- Eastern Franklin MA-Northern Worcester MA-Western Hampshire MA- Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA- Southern Worcester MA- Including the cities of Hartford, Windsor Locks, Union, Vernon, Putnam, Willimantic, Charlemont, Greenfield, Orange, Barre, Fitchburg, Chesterfield, Blandford, Amherst, Northampton, Springfield, Milford, and Worcester 640 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow is tapering off. No further accumulations are expected. $$ MAZ017>023-RIZ001>007-080600- /O.CON.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA- Northwest Providence RI-Southeast Providence RI-Western Kent RI- Eastern Kent RI-Bristol RI-Washington RI-Newport RI- Including the cities of Taunton, Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, Vineyard Haven, Foster, Smithfield, Providence, Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, and Newport 640 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow. Additional snow accumulations of up to two inches. Winds gusting as high as 40 mph. * WHERE...Portions of southeastern Massachusetts and northern and southern Rhode Island. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ013-015-016-080600- /O.CON.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Western Norfolk MA-Suffolk MA-Eastern Norfolk MA- Including the cities of Foxborough, Norwood, Boston, and Quincy 640 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow. Additional snow accumulations of up to two inches. * WHERE...Suffolk MA, Eastern Norfolk MA and Western Norfolk MA Counties. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ024-RIZ008-080600- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Nantucket MA-Block Island RI- Including the cities of Nantucket and New Shoreham 640 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Wet snow expected. Winds gusting as high as 45 mph. * WHERE...In Massachusetts, Nantucket MA County. In Rhode Island, Block Island RI County. * WHEN...Until 1 AM EST Monday. * IMPACTS...Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ MAZ005>007-014-026-080600- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Central Middlesex MA-Western Essex MA-Eastern Essex MA- Southeast Middlesex MA-Northern Middlesex MA- Including the cities of Framingham, Lowell, Lawrence, Gloucester, Cambridge, and Ayer 640 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Snow. Additional snow accumulations of up to two inches. * WHERE...Southeast Middlesex MA, Central Middlesex MA, Western Essex MA, Eastern Essex MA and Northern Middlesex MA Counties. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$
719 WWUS41 KBOX 080030 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 730 PM EST Sun Feb 7 2021 MAZ013-015>021-RIZ001>007-080130- /O.CAN.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Western Norfolk MA-Suffolk MA-Eastern Norfolk MA- Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Northwest Providence RI- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Bristol RI-Washington RI-Newport RI- Including the cities of Foxborough, Norwood, Boston, Quincy, Taunton, Brockton, Plymouth, Fall River, New Bedford, Mattapoisett, Foster, Smithfield, Providence, Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, and Newport 730 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING IS CANCELLED... Snow is diminishing and will end early tonight. $$ MAZ005-006-014-026-RIZ008-080130- /O.CAN.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Central Middlesex MA-Western Essex MA-Southeast Middlesex MA- Northern Middlesex MA-Block Island RI- Including the cities of Framingham, Lowell, Lawrence, Cambridge, Ayer, and New Shoreham 730 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow is diminishing and will end early tonight. $$ MAZ022-023-080600- /O.CON.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Barnstable MA-Dukes MA- Including the cities of Chatham, Falmouth, Provincetown, and Vineyard Haven 730 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Heavy snow. Additional snow accumulations of up to one inch. Winds gusting as high as 40 mph. * WHERE...Barnstable MA and Dukes MA Counties. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. && $$ MAZ024-080600- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Nantucket MA- Including the city of Nantucket 730 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Snow. Winds gusting as high as 45 mph. * WHERE...Nantucket MA County. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$ MAZ007-080600- /O.CON.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Eastern Essex MA- Including the city of Gloucester 730 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST MONDAY... * WHAT...Snow. Additional snow accumulations of up to one inch. * WHERE...Eastern Essex MA County. * WHEN...Until 1 AM EST Monday. * IMPACTS...Plan on slippery road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. && $$
590 WWUS41 KBOX 080234 WSWBOX URGENT - WINTER WEATHER MESSAGE National Weather Service Boston/Norton MA 934 PM EST Sun Feb 7 2021 MAZ022-023-080345- /O.CAN.KBOX.WS.W.0003.000000T0000Z-210208T0600Z/ Barnstable MA-Dukes MA- Including the cities of Chatham, Falmouth, Provincetown, and Vineyard Haven 934 PM EST Sun Feb 7 2021 ...WINTER STORM WARNING IS CANCELLED... The accumulating snow has come to end, despite some lingering light snow showers through about midnight. However, some roadways will remain slippery overnight so please drive with extra caution. $$ MAZ007-024-080345- /O.CAN.KBOX.WW.Y.0008.000000T0000Z-210208T0600Z/ Eastern Essex MA-Nantucket MA- Including the cities of Gloucester and Nantucket 934 PM EST Sun Feb 7 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... The snow has come to end and the Winter Weather Advisory has been cancelled. However, some roadways will remain slippery overnight so please drive with extra caution. $$ Frank
What forecasters said that day
The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before this winter weather advisory went out at Feb 6, 2:56 PM EST, 31 minutes earlier.
Area forecast discussion, Feb 6, 2:56 PM EST, 31 minutes before
Area Forecast Discussion
National Weather Service Boston/Norton MA
256 PM EST Sat Feb 6 2021
.SYNOPSIS...
Dry and seasonable weather is on tap for today and tonight, but it
will be windy for a time later this morning and afternoon. A short
duration snowstorm will impact the region on Sunday with the highest
amounts near and especially southeast of I-95. Drier weather
returns on Monday. Additional snow and rain storms are possible
around Tuesday and Friday.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
1240 PM Update...
Only minor changes in the latest update as the forecast remains
on track. Main focus early this afternoon will be on fine-tuning
the details for winter storm. Stay tuned!
PREVIOUS DISCUSSION...
A mixture of sun and clouds is on tap for today, but it will become
somewhat windy by afternoon. 850T drop to between -10C and -12C
early this morning behind a cold front. This combined with a modest
west to southwest jet will bring good mixing with the colder
temps aloft moving into the region. The result will be southwest
wind gusts on the order of 25 to 35 mph developing by afternoon, but
a few gusts around 40 mph are possible across the Cape and Islands.
High temperatures should range from the middle 30s in the higher
terrain to the upper 30s/lower 40s elsewhere. It will feel colder
though given the windy conditions.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY NIGHT/...
Highlights...
* Snowstorm Sunday with uncertainty on NW extent of higher amounts
* Greatest concern is across RI/SE MA where heavy wet snow may
result in the risk of some power outages
Details...
Tonight...
A rather quiet but cold night is in store for the region as a ridge
of high pressure passes to our south. Light winds along with mainly
clear skies during the first half of night will allow for good
radiational cooling, especially northwest of I-95 where a deep
snowpack was still in place. Low temps should bottom out in the
teens to lower 20s and may even see a few high single digit readings
in the normally coldest outlying areas of northwest MA. Low pressure
developing off the mid Atlantic states will result in a significant
increase in mid/high level cloudiness after midnight. This will
result in temps leveling off or even rising a few degrees toward
daybreak.
Sunday...
Low pressure developing off the Carolina coast early Sunday morning
will rapidly lift northeast and pass near the Benchmark Sunday
afternoon/early evening. Snow will rapidly overspread the region
from southwest to northeast Sunday morning and continue Sunday
afternoon. Ptype on this one should pretty much be all snow, except
perhaps for parts of the outer-Cape and Nantucket where some rain
and sleet may mix in at times. This will be a very progressive/fast
moving coastal storm with the snow pretty much exiting the coast by
early to mid Sunday evening.
While we are confident in a plowable snow across most of southern
New England, the uncertainty exists on whether or not higher amounts
advertised by certain models will be realized. Also, the northwest
extent of the heavier amounts is also uncertain. There is a battle
amongst a lot of the global vs. high resolution model guidance. The
tendency is for a lot of the high resolution data to be heavier with
the snow amounts and also further northwest compared to the global
models. It is quite evident even comparing the 3 KM to 12 KM NAM
model.
Given the differences we somewhat blended the guidance together.
While we think some of the high resolution guidance may be too heavy
with the QPF & as well as being too far northwest; there are a few
things we need to consider. There are some indicates of a band of
pretty intense 700 mb frontogenesis and good snowgrowth on the
northwest side of the storm. We also should mention there are
decent mid level lapse rates and a -EPV signature. This may result
in 1-2 inch per hour snowfall rates for a time especially late
Sunday morning and Sunday afternoon. In addition, a period of good
SLR/s would occur in this band especially if it is able to reach
northwest of I-95, where surface temperatures will be colder.
We opted to issue a Winter Storm Watch for northern CT, northwest RI
and most of MA except for the northwest portion of the state. While
we are uncertain if heavier banding will be able to make it this far
northwest; a watch just requires 50 percent confidence in criteria
being met and given colder temps SLR/s will be better than 10 to 1.
Hopefully, the differences between some of the guidance
will be sorted out with the 12z runs and later shifts can upgrade
to warnings or go with winter weather advisories. Regardless,
confidence is fairly high in a plowable snow across this region.
Went ahead and converted the Winter Storm Watch to a warning for
central and southern RI as well as southeast MA including Cape Cod.
There is a good 700 mb banding signature in this region, which
should lead to a period of 1 to 2 inch per hour snowfall rates. Our
thinking is that 5 to 9 inches of snow seem reasonable for this
region. This will also be a wet snow with surface temperatures right
around freezing, so some power outages will be possible if the
higher amounts are realized. We did opt to keep the Winter Storm
Watch for Nantucket given the mixing potential.
Lastly, given the track of this system and lack of strong high
pressure to our north winds will not be much of a problem for most
of the region. We do expect wind gusts of 30 to 45 mph across the
Cape and Islands, which is not that strong for their standards but
could be somewhat more of an issue with the wet snow.
&&
.LONG TERM /MONDAY THROUGH SATURDAY/...
Big Picture...
Low pressure sits over Central Canada through much of the forecast
period, with upper jet flow around the low and across the northern
tier of the USA. Smaller shortwaves will likely be moving through
this flow during the week, with notable wave passages currently
pointing to Tuesday and Friday, although timing may vary as it
usually does with shortwaves.
Thermal fields start the week are a little colder than seasonable.
After the Tuesday shortwave, temperatures at 850 mb are forecast to
drop 10C, signalling a much colder period Wednesday-Thursday.
Temperatures moderate Thursday night-Friday, before cooling off
again behind the Friday shortwave.
Mass fields are consistent through midweek. Solutions then start to
differ Friday-Saturday, possibly later Thursday. Thermal fields show
a similar consistency. Forecast confidence is moderate-high early
to midweek, trending to low by next Saturday.
Details...
Monday-Tuesday...
Weak high pressure brings dry weather Monday, but moisture fields
show increasing high level values...probably increasing mid and high
clouds...Monday. As the shortwave approaches Tuesday, expect surface
low in the Midwest to jump to the coast with best upper jet support
just off our South Coast. This will bring precipitation Tuesday, and
with a southeast wind would expect mainly snow inland and rain or a
rain/snow mix South Coast. Potential for several inches accumulation
where there is no changeover. Precip then winds down Tuesday evening
as surface low moves off to the east and surface winds over New
England turn from the northwest.
Temps aloft Monday support surface values in the mid to upper 20s,
maybe around 30 on the South Coast. Dews of 5-15F and light wind
would leave room for min sfc temps 10-20 with some cold spots in the
high single numbers. Low level temps Tuesday support mid-upper 30s
south coast and upper 20s-low 30s inland. Northwest wind and colder
lower layer temps support Tuesday night min temps roughly 15-25F.
Wednesday-Thursday...
High pressure weakly builds over the region bringing dry weather
Wednesday and Thursday, but with moisture again increasing in the
mid and high level cloud levels. Surface winds turn from the east
Thursday night, which would bring increasing lower clouds and a
chance of precipitation after midnight. Temps at 950-mb each day are
fcst in the range from minus 8C to minus 11C, supporting max sfc
temps in the 20s. Wednesday could be a few degrees less cold along
the coast with highs in the lower 30s.
Friday-Saturday...
Upper shortwave generates coastal low along the Carolinas
Friday which moves up the coast and passes offshore of Srn New
England Friday night, then moves to the Maritimes Saturday. GFS
brings the track over the 40N/70W benchmark with a cold air dam
signal over interior Srn New England. This would suggest a snow
signal from early Friday morning through Friday night as the
precip shield moves in. Easterly winds at the surface would
suggest a chance to rain along the coasts. But as noted above,
diverging model solutions bring lower confidence in details at
this time.
&&
.AVIATION /20Z SATURDAY THROUGH THURSDAY/...
Forecaster Confidence Levels.
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent
Through 00Z...High confidence
VFR conditions expected today with gusty W to WSW winds of 25 to
35 kts. Expect the 35 kt gusts to be more likely over Cape Cod
and the Islands. May see FEW to BKN cloud bases around 5 kft per
the RAP/NAM BUFKIT soundings and per the latest satellite obs
over Upstate NY into western MA.
Tonight...High confidence
VFR with an increase in mid to high clouds late. Winds becoming
light and shifting from the W to the N and eventually the NE/E.
Sunday...High confidence on trends, moderate on timing.
Conditions deteriorating to IFR/LIFR from southwest to
northeast during the morning and continue through the afternoon.
This is in response to widespread snow that will fall heavy at
times, especially along and southeast of a Hartford to Worcester
to Boston line. Ptype should be snow for much of the region,
except for the immediate Eastern MA coast as well as the Cape
and Islands where rain and/or sleet is expected to mix in. E
winds are expected through 18z, then turning NNE before becoming
N between 21-23z. For BOS, expect -SN to move in by 16z, and may
mix with rain through 18z before a quick burst of +SN between
19-22z.
Winds wise, expect gusts between 15 and 25 knots along the I-95
corridor and 25 to 35 knots across the Cape/Islands. We may
even see a few gusts around 40 knots across Nantucket.
KBOS TAF...High confidence on trends, moderate on timing.
KBDL TAF...High confidence on trends, moderate on timing.
Outlook /Monday through Wednesday/...
Monday: VFR. Breezy.
Monday Night: VFR.
Tuesday: Mainly IFR, with local MVFR possible. Breezy. SN
likely.
Tuesday Night: Mainly VFR, with areas IFR possible. Breezy. SN
likely.
Wednesday: VFR. Breezy.
&&
.MARINE...
Today...High Confidence. Modest WSW low level jet coupled with good
mixing should yield southwest wind gusts of 35 knots by afternoon
across our open waters. We converted the Gale Watches to Warnings
across all waters except small craft headlines for Boston Harbor and
Narragansett Bay. Seas will be quite choppy and high.
Tonight...High Confidence. Winds diminish to small craft advisory
levels by early evening and below that by or shortly after midnight.
This is response to a brief ridge of high pressure building to our
south. However, seas will remain rather high given lingering
southerly swell.
Sunday...High Confidence. A fast moving low pressure system will
lift northeast from the mid Atlantic and pass near the Benchmark
Sunday afternoon and early evening. NE small craft wind gusts of 25
to 30 knots expected across our northern waters, but 35 to 40 knot
gusts in our southern waters seem reasonable. Another set of Gale
Headlines will likely be needed for our southern waters.
Outlook /Monday through Wednesday/...
Monday: Low risk for Small Craft Advisory winds with gusts up
to 30 kt. Local rough seas.
Monday Night: Winds less than 25 kt. Seas locally approaching
5 ft.
Tuesday: Winds less than 25 kt. Seas locally approaching 5 ft.
Chance of rain, chance of snow. Areas of visibility 1 to 3 nm.
Tuesday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Local rough seas. Rain likely, chance of
snow. Visibility 1 to 3 nm.
Wednesday: Low risk for Small Craft Advisory winds with gusts
up to 25 kt. Areas of seas approaching 5 ft.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Winter Storm Watch from Sunday morning through late Sunday
night for CTZ002>004.
MA...Winter Storm Warning from 7 AM Sunday to 1 AM EST Monday for
MAZ017>023.
Winter Storm Watch from Sunday morning through late Sunday
night for MAZ004>016-024-026.
RI...Winter Storm Warning from 7 AM Sunday to 1 AM EST Monday for
RIZ002>008.
Winter Storm Watch from Sunday morning through late Sunday
night for RIZ001.
MARINE...Gale Warning until 7 PM EST this evening for ANZ231>235-237-
250-251-254>256.
Small Craft Advisory until 7 PM EST this evening for ANZ230-
236.
&&
SYNOPSIS...WTB/Frank
NEAR TERM...Chai/RM
SHORT TERM...Frank
LONG TERM...WTB
AVIATION...WTB/Frank/Chai
MARINE...WTB/FrankHazardous weather outlook, Feb 6, 4:21 AM EST, 11 hours 6 minutes before
Hazardous Weather Outlook National Weather Service Boston/Norton MA 421 AM EST Sat Feb 6 2021 MAZ017>023-RIZ002>008-070930- Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA- Southeast Providence RI-Western Kent RI-Eastern Kent RI-Bristol RI- Washington RI-Newport RI-Block Island RI- 421 AM EST Sat Feb 6 2021 ...WINTER STORM WARNING IN EFFECT FROM 7 AM SUNDAY TO 1 AM EST MONDAY... This Hazardous Weather Outlook is for southeastern Massachusetts, northern Rhode Island and southern Rhode Island. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Winter Storm Warning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MAZ024-070930- Nantucket MA- 421 AM EST Sat Feb 6 2021 ...WINTER STORM WATCH IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY NIGHT... This Hazardous Weather Outlook is for southeastern Massachusetts. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Winter Storm Watch. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ231>235-237-250-251-254>256-070930- Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- Rhode Island Sound-Block Island Sound- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary-Massachusetts Bay and Ipswich Bay- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 421 AM EST Sat Feb 6 2021 ...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING... This Hazardous Weather Outlook is for Massachusetts coastal waters and Rhode Island coastal waters. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ230-236-070930- Boston Harbor-Narragansett Bay- 421 AM EST Sat Feb 6 2021 This Hazardous Weather Outlook is for Massachusetts coastal waters and Rhode Island coastal waters. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CTZ002>004-MAZ004>016-026-RIZ001-070930- Hartford CT-Tolland CT-Windham CT-Northern Worcester MA- Central Middlesex MA-Western Essex MA-Eastern Essex MA- Western Hampshire MA-Western Hampden MA-Eastern Hampshire MA- Eastern Hampden MA-Southern Worcester MA-Western Norfolk MA- Southeast Middlesex MA-Suffolk MA-Eastern Norfolk MA- Northern Middlesex MA-Northwest Providence RI- 421 AM EST Sat Feb 6 2021 ...WINTER STORM WATCH IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY NIGHT... This Hazardous Weather Outlook is for northern Connecticut, central Massachusetts, eastern Massachusetts, northeastern Massachusetts, western Massachusetts and northern Rhode Island. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Winter Storm Watch. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MAZ002-003-070930- Western Franklin MA-Eastern Franklin MA- 421 AM EST Sat Feb 6 2021 This Hazardous Weather Outlook is for western Massachusetts. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. For more information on upcoming hazardous weather, please see the Area Forecast Discussion on our webpage for the latest forecast thinking. There is also our Enhanced Hazardous Weather Outlook at www.weather.gov/box/ehwo For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 6, 3:20 AM EST | Winter Storm Warning | BOX | Barnstable, Bristol, Dukes, Essex, Middlesex, Norfolk and 3 more | 42 hr |
| Feb 6, 3:25 AM EST | Gale Warning | BOX | 12 hr | |
| Feb 6, 3:28 PM EST | Gale Warning | BOX | 36 hr | |
| Feb 6, 3:28 PM EST | Small Craft Advisory | BOX | 52 hr |
Nearby
Winter Weather Advisories in Massachusetts, 2021Winter Weather Advisories in Connecticut, 2021Winter Weather Advisories in Rhode Island, 2021Every winter weather advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.