Alert archive / Rhode Island / Freeze Warnings in 2021
Freeze Warning 1, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this freeze warning at Apr 21, 2021, 4:13 PM EDT for Kent County, Providence County, Rhode Island; Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It took effect at Apr 21, 2021, 10:00 PM EDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2021, 4:13 PM EDT (20:13 UTC)
- In effect from
- Apr 21, 2021, 10:00 PM EDT
- Expired
- Apr 22, 2021, 6:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Boston/Norton, MA
Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT, Kent County, RI, Providence County, RI
The radar
The Boston radar (KBOX), 68 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 130 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
- 1427 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
861 WWUS71 KBOX 212013 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 413 PM EDT Wed Apr 21 2021 CTZ002>004-RIZ001-003-220915- /O.NEW.KBOX.FZ.W.0001.210422T0200Z-210422T1000Z/ Hartford CT-Tolland CT-Windham CT-Northwest Providence RI- Western Kent RI- Including the cities of Hartford, Windsor Locks, Union, Vernon, Putnam, Willimantic, Foster, Smithfield, Coventry, and West Greenwich 413 PM EDT Wed Apr 21 2021 ...FREEZE WARNING IN EFFECT FROM 10 PM THIS EVENING TO 6 AM EDT THURSDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...In Connecticut, Hartford CT, Tolland CT and Windham CT Counties. In Rhode Island, Northwest Providence RI and Western Kent RI Counties. * WHEN...From 10 PM this evening to 6 AM EDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ MAZ013-017-018-220915- /O.NEW.KBOX.FZ.A.0001.210423T0200Z-210423T1000Z/ Western Norfolk MA-Northern Bristol MA-Western Plymouth MA- Including the cities of Foxborough, Norwood, Taunton, and Brockton 413 PM EDT Wed Apr 21 2021 ...FREEZE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...Sub-freezing temperatures as low as 30 possible. * WHERE...Western Norfolk MA, Northern Bristol MA and Western Plymouth MA Counties. * WHEN...From Thursday evening through late Thursday night. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ For more information from the National Weather Service visit https://weather.gov/box
1 follow-up statement
050 WWUS71 KBOX 220845 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 445 AM EDT Thu Apr 22 2021 CTZ002>004-RIZ001-003-221000- /O.CON.KBOX.FZ.W.0001.000000T0000Z-210422T1000Z/ Hartford CT-Tolland CT-Windham CT-Northwest Providence RI- Western Kent RI- Including the cities of Hartford, Windsor Locks, Union, Vernon, Putnam, Willimantic, Foster, Smithfield, Coventry, and West Greenwich 445 AM EDT Thu Apr 22 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING... * WHAT...Sub-freezing temperatures as low as 29. * WHERE...In Connecticut, Tolland CT, Hartford CT and Windham CT Counties. In Rhode Island, Western Kent RI and Northwest Providence RI Counties. * WHEN...Until 6 AM EDT early this morning. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ MAZ013-017-018-222100- /O.CON.KBOX.FZ.A.0001.210423T0200Z-210423T1000Z/ Western Norfolk MA-Northern Bristol MA-Western Plymouth MA- Including the cities of Foxborough, Norwood, Taunton, and Brockton 445 AM EDT Thu Apr 22 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH LATE TONIGHT... * WHAT...Sub-freezing temperatures as low as 32 possible. * WHERE...Western Plymouth MA, Western Norfolk MA and Northern Bristol MA Counties. * WHEN...From this evening through late tonight. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ For more information from the National Weather Service visit https://weather.gov/box
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 2:15 PM EDT | Special Weather Statement | BOX | 90 min | |
| Apr 21, 3:17 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 58 min |
Nearby
Freeze Warnings in Rhode Island, 2021Freeze Warnings in Connecticut, 2021Every freeze warning 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.