Alert archive / Massachusetts / Frost Advisories in 2021
Frost Advisory 1, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this frost advisory at Oct 22, 2021, 2:53 PM EDT for 7 counties in Massachusetts; Northeastern Connecticut Planning Region, Connecticut. It took effect at Oct 24, 2021, 12:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Oct 22, 2021, 2:53 PM EDT (18:53 UTC)
- In effect from
- Oct 24, 2021, 12:00 AM EDT
- Expired
- Oct 24, 2021, 8:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Boston/Norton, MA
Counties Northeastern Connecticut Planning Region, CT, Bristol County, MA, Essex County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA
The radar
The Boston radar (KBOX), 43 km from the middle of the area, began a volume at 18:56 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
Brookhaven, NY (KOKX), launched 12:00Z, 6.9 hours before the alert went out and 181 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
- 1138 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
175 WWUS71 KBOX 221853 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 253 PM EDT Fri Oct 22 2021 MAZ009>011-230800- /O.NEW.KBOX.FR.Y.0001.211024T0400Z-211024T1200Z/ Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA- Including the cities of Blandford, Amherst, Northampton, and Springfield 253 PM EDT Fri Oct 22 2021 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT SATURDAY NIGHT TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Western Hampden MA, Eastern Hampshire MA and Eastern Hampden MA Counties. * WHEN...From midnight Saturday night to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/box
3 follow-up statements
289 WWUS71 KBOX 230711 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 311 AM EDT Sat Oct 23 2021 MAZ009>011-232015- /O.CON.KBOX.FR.Y.0001.211024T0400Z-211024T1200Z/ Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA- Including the cities of Blandford, Amherst, Northampton, and Springfield 311 AM EDT Sat Oct 23 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Western Hampden MA, Eastern Hampshire MA and Eastern Hampden MA Counties. * WHEN...From midnight Saturday night to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/box
507 WWUS71 KBOX 231920 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 320 PM EDT Sat Oct 23 2021 CTZ003-004-MAZ005-006-013-017-018-026-240830- /O.EXA.KBOX.FR.Y.0001.211024T0400Z-211024T1200Z/ Tolland CT-Windham CT-Central Middlesex MA-Western Essex MA- Western Norfolk MA-Northern Bristol MA-Western Plymouth MA- Northern Middlesex MA- Including the cities of Union, Vernon, Putnam, Willimantic, Framingham, Lowell, Lawrence, Foxborough, Norwood, Taunton, Brockton, and Ayer 320 PM EDT Sat Oct 23 2021 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT SUNDAY... * WHAT...Temperatures dropping into the middle 30s will result in frost formation. * WHERE...In Connecticut, Tolland CT and Windham CT Counties. In Massachusetts, Central Middlesex MA, Western Essex MA, Western Norfolk MA, Northern Bristol MA, Western Plymouth MA and Northern Middlesex MA Counties. * WHEN...From midnight tonight to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MAZ009>011-240830- /O.CON.KBOX.FR.Y.0001.211024T0400Z-211024T1200Z/ Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA- Including the cities of Blandford, Amherst, Northampton, and Springfield 320 PM EDT Sat Oct 23 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT SUNDAY... * WHAT...Temperatures falling into the middle 30s will result in frost formation. * WHERE...Western Hampden MA, Eastern Hampden MA and Eastern Hampshire MA Counties. * WHEN...From midnight tonight to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Frank For more information from the National Weather Service visit https://weather.gov/box
476 WWUS71 KBOX 240726 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 326 AM EDT Sun Oct 24 2021 CTZ003-004-MAZ005-006-009>011-013-017-018-026-241200- /O.CON.KBOX.FR.Y.0001.000000T0000Z-211024T1200Z/ Tolland CT-Windham CT-Central Middlesex MA-Western Essex MA- Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA- Western Norfolk MA-Northern Bristol MA-Western Plymouth MA- Northern Middlesex MA- Including the cities of Union, Vernon, Putnam, Willimantic, Framingham, Lowell, Lawrence, Blandford, Amherst, Northampton, Springfield, Foxborough, Norwood, Taunton, Brockton, and Ayer 326 AM EDT Sun Oct 24 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Temperatures dropping into the middle 30s will result in frost formation. * WHERE...In Connecticut, Tolland CT and Windham CT Counties. In Massachusetts, Central Middlesex MA, Western Essex MA, Western Norfolk MA, Northern Bristol MA, Western Plymouth MA and Northern Middlesex MA Counties. * WHEN...From midnight tonight to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/box
Nearby
Frost Advisories in Massachusetts, 2021Frost Advisories in Connecticut, 2021Every frost 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.