Alert archive / Connecticut / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 6, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 30, 2011, 7:31 AM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It was in force for 44 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
- May 30, 2011, 7:31 AM EDT (11:31 UTC)
- Expired
- May 30, 2011, 8:15 AM EDT
- In force
- 44 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT
The radar
The Brookhaven radar (KOKX), 99 km from the middle of the area, began a volume at 11:34 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 00:00Z, 11.5 hours before the alert went out and 99 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
- 264 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 822 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
631
WUUS51 KBOX 301131
SVRBOX
CTC003-013-015-301215-
/O.NEW.KBOX.SV.W.0006.110530T1131Z-110530T1215Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
731 AM EDT MON MAY 30 2011
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...
SOUTHERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...
SOUTHWESTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
THIS INCLUDES THE CITY OF WILLIMANTIC...
* UNTIL 815 AM EDT
* AT 728 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR GLASTONBURY...OR 7 MILES
EAST OF NEWINGTON...AND WAS MOVING EAST AT 45 MPH.
* SOME LOCATIONS IN THE WARNING INCLUDE...MARLBOROUGH...ANDOVER...
HEBRON...COLUMBIA...WINDHAM AND SCOTLAND.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT LIGHTNING WAS
OCCURRING WITH THIS STORM. GET INDOORS OR INSIDE A VEHICLE NOW! DO
NOT SEEK SHELTER UNDER TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.
&&
LAT...LON 4173 7263 4175 7197 4163 7197 4166 7215
4166 7217 4171 7224 4167 7227 4164 7233
4160 7232 4159 7234 4159 7247 4164 7251
4163 7261
TIME...MOT...LOC 1131Z 273DEG 45KT 4166 7256
$$
THOMPSON2 follow-up statements
665
WWUS51 KBOX 301155
SVSBOX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
755 AM EDT MON MAY 30 2011
CTC003-013-015-301215-
/O.CON.KBOX.SV.W.0006.000000T0000Z-110530T1215Z/
HARTFORD CT-TOLLAND CT-WINDHAM CT-
755 AM EDT MON MAY 30 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM EDT
FOR SOUTHWESTERN WINDHAM...SOUTHERN TOLLAND AND SOUTHEASTERN HARTFORD
COUNTIES...
AT 752 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR HEBRON...OR 6 MILES NORTH OF COLCHESTER...MOVING EAST AT
45 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WILLIMANTIC...WINDHAM AND SCOTLAND
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 4173 7263 4175 7197 4163 7197 4166 7215
4166 7217 4171 7224 4167 7227 4164 7233
4160 7232 4159 7234 4159 7247 4164 7251
4163 7261
TIME...MOT...LOC 1155Z 272DEG 41KT 4166 7228
$$
THOMPSON151
WWUS51 KBOX 301216
SVSBOX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
816 AM EDT MON MAY 30 2011
CTC003-013-015-301225-
/O.EXP.KBOX.SV.W.0006.000000T0000Z-110530T1215Z/
HARTFORD CT-TOLLAND CT-WINDHAM CT-
816 AM EDT MON MAY 30 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WINDHAM...
SOUTHERN TOLLAND AND SOUTHEASTERN HARTFORD COUNTIES HAS EXPIRED...
THE THUNDERSTORM HAS WEAKEND SOME AS IT SKIRTS ALONG THE WINDHAM AND
NEW LONDON COUNTY BORDER. IT IS STILL CAPABLE OF PRODUCING SMALL
HAIL AND WIND GUSTS BETWEEN 40 AND 50 MPH. THIS STORM WILL ALSO
CONTINUE TO PRODUCE FREQUENT LIGHTNING AND VERY HEAVY DOWNPOURS.
LAT...LON 4173 7263 4175 7197 4163 7197 4166 7215
4166 7217 4171 7224 4167 7227 4164 7233
4160 7232 4159 7234 4159 7247 4164 7251
4163 7261
TIME...MOT...LOC 1215Z 272DEG 41KT 4165 7197
$$
THOMPSONThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 7:03 AM EDT | Special Weather Statement | BOX | 42 min | |
| May 30, 8:02 AM EDT | Areal Flood Advisory | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 2 hr |
Nearby
Severe Thunderstorm Warnings in Connecticut, 2011Every severe thunderstorm warning in 2011
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.