Alert archive / Connecticut / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 112, NWS Albany, NY
NWS Albany, NY issued this severe thunderstorm warning at Jul 17, 2021, 3:22 PM EDT for Northwest Hills Planning Region, Connecticut; Dutchess County, New York. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2021, 3:22 PM EDT (19:22 UTC)
- Expired
- Jul 17, 2021, 4:15 PM EDT
- In force
- 53 min
- Issued by
- NWS Albany, NY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Northwest Hills Planning Region, CT, Dutchess County, NY
The radar
The Brookhaven radar (KOKX), 91 km from the middle of the area, began a volume at 19:25 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 17, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.4 hours before the alert went out and 91 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
- 1203 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1054 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.0
The text
As transmitted.
346
WUUS51 KALY 171922
SVRALY
CTC005-NYC027-172015-
/O.NEW.KALY.SV.W.0112.210717T1922Z-210717T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Albany NY
322 PM EDT Sat Jul 17 2021
The National Weather Service in Albany has issued a
* Severe Thunderstorm Warning for...
Southern Litchfield County in northern Connecticut...
Southeastern Dutchess County in east central New York...
* Until 415 PM EDT.
* At 322 PM EDT, a severe thunderstorm was located over Woodbury
Center, or near Southbury, moving northeast at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Torrington, New Milford, Sherman, Pawling, Thomaston, Litchfield,
Northwest Harwinton, Oakville, New Preston, Terryville, Woodbury
Center, Gaylordsville, Watertown, Plymouth, Woodbury, Harwinton,
Bethlehem, Washington, Morris and Roxbury.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
Please report hail size...damaging winds and reports of trees down to
the National Weather Service by email at Alb.Stormreport@noaa.gov...
On Facebook at www.facebook.com/nwsalbany or twitter @nwsalbany
LAT...LON 4151 7339 4149 7344 4160 7348 4159 7352
4153 7353 4157 7362 4163 7352 4160 7352
4161 7348 4165 7349 4191 7307 4184 7294
4181 7295 4180 7302 4164 7298 4157 7309
4156 7316 4151 7316 4151 7332 4147 7333
TIME...MOT...LOC 1922Z 223DEG 19KT 4156 7322
HAIL...1.00IN
WIND...60MPH
$$
Frugis2 follow-up statements
307
WWUS51 KALY 171925
SVSALY
Severe Weather Statement
National Weather Service Albany NY
325 PM EDT Sat Jul 17 2021
NYC027-171934-
/O.CAN.KALY.SV.W.0112.000000T0000Z-210717T2015Z/
Dutchess NY-
325 PM EDT Sat Jul 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DUTCHESS COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
eastern New York and northern Connecticut.
LAT...LON 4149 7343 4165 7349 4191 7307 4186 7298
4184 7294 4181 7295 4180 7302 4164 7298
4157 7309 4156 7316 4152 7316 4151 7318
4151 7332 4147 7333 4151 7339
TIME...MOT...LOC 1924Z 223DEG 19KT 4157 7321
$$
CTC005-172015-
/O.CON.KALY.SV.W.0112.000000T0000Z-210717T2015Z/
Litchfield CT-
325 PM EDT Sat Jul 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHERN LITCHFIELD COUNTY...
At 324 PM EDT, a severe thunderstorm was located over Woodbury
Center, or near Southbury, moving northeast at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Torrington, New Milford, Thomaston, Litchfield, Northwest Harwinton,
Oakville, New Preston, Terryville, Woodbury Center, Gaylordsville,
Watertown, Plymouth, Woodbury, Harwinton, Bethlehem, Washington,
Morris, Roxbury, Bridgewater and Bantam.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4149 7343 4165 7349 4191 7307 4186 7298
4184 7294 4181 7295 4180 7302 4164 7298
4157 7309 4156 7316 4152 7316 4151 7318
4151 7332 4147 7333 4151 7339
TIME...MOT...LOC 1924Z 223DEG 19KT 4157 7321
HAIL...1.00IN
WIND...60MPH
$$
Frugis828
WWUS51 KALY 172014
SVSALY
Severe Weather Statement
National Weather Service Albany NY
414 PM EDT Sat Jul 17 2021
CTC005-172024-
/O.EXP.KALY.SV.W.0112.000000T0000Z-210717T2015Z/
Litchfield CT-
414 PM EDT Sat Jul 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LITCHFIELD COUNTY
WILL EXPIRE AT 415 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern Connecticut.
LAT...LON 4149 7343 4165 7349 4191 7307 4186 7298
4184 7294 4181 7295 4180 7302 4164 7298
4157 7309 4156 7316 4152 7316 4151 7318
4151 7332 4147 7333 4151 7339
TIME...MOT...LOC 2014Z 223DEG 19KT 4176 7298
$$
FrugisThe office that day
Everything else NWS Albany, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 3:09 PM EDT | Special Weather Statement | ALY | 51 min | |
| Jul 17, 3:17 PM EDT | Areal Flood Advisory | ALY | Northwest Hills Planning Region | 3 hr |
| Jul 17, 4:18 PM EDT | Special Weather Statement | ALY | 27 min | |
| Jul 17, 4:20 PM EDT | Flash Flood Warning | ALY | Northwest Hills Planning Region | 3 hr |
| Jul 17, 5:23 PM EDT | Areal Flood Advisory | ALY | Northwest Hills Planning Region | 3 hr |
| Jul 17, 1:39 PM EDT | Special Weather Statement | ALY | Schoharie | 51 min |
| Jul 17, 2:24 PM EDT | Special Weather Statement | ALY | Dutchess | 51 min |
| Jul 17, 3:37 PM EDT | Special Weather Statement | ALY | Columbia | 53 min |
| Jul 17, 3:57 PM EDT | Special Weather Statement | ALY | Dutchess | 48 min |
| Jul 17, 4:32 PM EDT | Special Weather Statement | ALY | Dutchess | 28 min |
| Jul 17, 4:36 PM EDT | Areal Flood Advisory | ALY | Dutchess, Ulster | 118 min |
| Jul 17, 4:47 PM EDT | Severe Thunderstorm Warning | ALY | Dutchess, Ulster | 58 min |
| Jul 17, 4:49 PM EDT | Special Weather Statement | ALY | Columbia | 41 min |
| Jul 17, 5:25 PM EDT | Severe Thunderstorm Warning | ALY | Columbia, Dutchess, Greene, Ulster | 65 min |
| Jul 17, 5:31 PM EDT | Flash Flood Warning | ALY | Columbia, Dutchess | 4 hr |
| Jul 17, 6:02 PM EDT | Special Weather Statement | ALY | Ulster | 43 min |
| Jul 17, 6:22 PM EDT | Special Weather Statement | ALY | Albany | 38 min |
| Jul 17, 6:30 PM EDT | Areal Flood Advisory | ALY | Ulster | 5 hr |
| Jul 17, 6:49 PM EDT | Special Weather Statement | ALY | Ulster | 26 min |
| Jul 17, 7:51 PM EDT | Areal Flood Advisory | ALY | Dutchess, Ulster | 114 min |
Nearby
Severe Thunderstorm Warnings in Connecticut, 2021Severe Thunderstorm Warnings in New York, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.