Alert archive / Connecticut / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 29, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Jun 30, 2021, 7:52 PM EDT for Naugatuck Valley Planning Region, Connecticut. It was in force for 38 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 30, 2021, 7:52 PM EDT (23:52 UTC)
- Expired
- Jun 30, 2021, 8:30 PM EDT
- In force
- 38 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
The radar
The Brookhaven radar (KOKX), 76 km from the middle of the area, began a volume at 23:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 30, 8:10 PM EDT | TSTM WND DMG | Waterbury, CT | WATERBURY POLICE REPORTS A COUPLE OF TREES DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 30, 3:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.9 hours before the alert went out and 76 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
- 658 J/kg
- Mixed-layer CIN
- -190 J/kg
- Mixed-layer LCL
- 1595 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
518
WUUS51 KOKX 302352
SVROKX
CTC009-010030-
/O.NEW.KOKX.SV.W.0029.210630T2352Z-210701T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
752 PM EDT Wed Jun 30 2021
The National Weather Service in Upton NY has issued a
* Severe Thunderstorm Warning for...
Northwestern New Haven County in southern Connecticut...
* Until 830 PM EDT.
* At 751 PM EDT, a severe thunderstorm was located over Southbury,
moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* This severe thunderstorm will be near...
Naugatuck and Middlebury around 805 PM EDT.
Prospect and Beacon Falls around 810 PM EDT.
Hamden and Cheshire around 815 PM EDT.
Wallingford around 825 PM EDT.
Meriden and Durham around 830 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4156 7295 4156 7288 4154 7285 4157 7284
4155 7282 4157 7280 4157 7275 4147 7273
4143 7274 4143 7324 4145 7328 4145 7330
4150 7332 4151 7316 4156 7316 4157 7309
4159 7306 4161 7305 4164 7298 4164 7294
TIME...MOT...LOC 2351Z 272DEG 35KT 4150 7326
HAIL...0.75IN
WIND...60MPH
$$
MW2 follow-up statements
839
WWUS51 KOKX 010014
SVSOKX
Severe Weather Statement
National Weather Service New York NY
814 PM EDT Wed Jun 30 2021
CTC009-010030-
/O.CON.KOKX.SV.W.0029.000000T0000Z-210701T0030Z/
New Haven CT-
814 PM EDT Wed Jun 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR NORTH CENTRAL NEW HAVEN COUNTY...
At 814 PM EDT, a severe thunderstorm was located over Prospect, or
over Naugatuck, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
This severe storm will be near...
Hamden and Cheshire around 820 PM EDT.
Wallingford around 825 PM EDT.
Meriden and Durham around 835 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4156 7295 4156 7288 4154 7285 4157 7284
4155 7282 4157 7280 4157 7275 4147 7273
4143 7274 4143 7311 4157 7310 4157 7309
4159 7306 4161 7305 4164 7298 4164 7294
TIME...MOT...LOC 0014Z 272DEG 35KT 4149 7300
HAIL...0.75IN
WIND...60MPH
$$
MW631
WWUS51 KOKX 010033
SVSOKX
Severe Weather Statement
National Weather Service New York NY
833 PM EDT Wed Jun 30 2021
CTC009-010042-
/O.EXP.KOKX.SV.W.0029.000000T0000Z-210701T0030Z/
New Haven CT-
833 PM EDT Wed Jun 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL NEW HAVEN COUNTY
HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southern Connecticut.
LAT...LON 4156 7295 4156 7288 4154 7285 4157 7284
4155 7282 4157 7280 4157 7275 4147 7273
4143 7274 4143 7311 4157 7310 4157 7309
4159 7306 4161 7305 4164 7298 4164 7294
TIME...MOT...LOC 0032Z 272DEG 35KT 4148 7278
$$
MWThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 8:39 PM EDT | Special Weather Statement | OKX | 36 min |
Nearby
Severe Thunderstorm Warnings in Connecticut, 2021Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.