Alert archive / Connecticut / Special Weather Statements in 2011

Special Weather Statement, NWS Boston/Norton, MA

August 1, 2011

NWS Boston/Norton, MA issued this special weather statement at Aug 1, 2011, 4:00 PM EDT. It was in force for 45 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
Aug 1, 2011, 4:00 PM EDT (20:00 UTC)
Expired
Aug 1, 2011, 4:45 PM EDT
In force
45 min
Issued by
NWS Boston/Norton, MA

The radar

The Boston radar (KBOX), 116 km from the middle of the area, began a volume at 20:01 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

TimeReportWhereRemark
Aug 1, 4:25 PM EDTHAIL 0.75Enfield, CT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.0 hours before the alert went out and 127 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.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2011-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 529 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2011-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
529 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
975 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

257 
WWUS81 KBOX 012000
SPSBOX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
400 PM EDT MON AUG 1 2011

CTZ002-003-MAZ011-012045-
EASTERN HAMPDEN MA-HARTFORD CT-TOLLAND CT-
400 PM EDT MON AUG 1 2011

...STRONG THUNDERSTORM FORMING IN NORTH CENTRAL CONNECTICUT...

AT 356 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
STRONG THUNDERSTORM CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH AND 
PENNY SIZED HAIL NEAR SUFFIELD...MOVING EAST AT 15 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...ENFIELD...SOMERS AND ELLINGTON.

FOR YOUR SAFETY...GET INSIDE WHEN THIS STORM APPROACHES. WINDS MAY BE
STRONG ENOUGH TO BRING DOWN SMALL BRANCHES. MINOR STREET FLOODING AND
PONDING OF WATER IN POOR DRAINAGE AREAS IS ALSO POSSIBLE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
MONDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND 
SOUTHERN NEW HAMPSHIRE AND RHODE ISLAND.

&&

LAT...LON 4202 7240 4187 7248 4198 7271 4203 7273

$$

JWD

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 1, 12:37 PM EDTSpecial Weather StatementBOXHampshire53 min
Aug 1, 1:24 PM EDTSpecial Weather StatementBOXHampshire51 min
Aug 1, 1:27 PM EDTAreal Flood AdvisoryBOXFranklin, Hampshire, Worcester3 hr
Aug 1, 1:34 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire, Worcester19 min
Aug 1, 1:41 PM EDTFlash Flood WarningBOXFranklin, Hampshire, Worcester3 hr
Aug 1, 1:55 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire35 min
Aug 1, 2:03 PM EDTSpecial Weather StatementBOXFranklin42 min
Aug 1, 2:08 PM EDTSpecial Weather StatementBOXHampden52 min
Aug 1, 2:13 PM EDTSevere Thunderstorm WarningBOXHampden47 min
Aug 1, 2:19 PM EDTFlash Flood WarningBOXHampden, Hampshire, Worcester116 min
Aug 1, 2:19 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire41 min
Aug 1, 3:01 PM EDTSpecial Weather StatementBOXWorcester59 min
Aug 1, 3:05 PM EDTSevere Thunderstorm WarningBOXHampden, Worcester17 min
Aug 1, 3:10 PM EDTSpecial Weather StatementBOXFranklin50 min
Aug 1, 3:14 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire, Worcester38 min
Aug 1, 3:18 PM EDTSevere Thunderstorm WarningBOXFranklin, Worcester42 min
Aug 1, 3:30 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire, Worcester45 min
Aug 1, 3:33 PM EDTSpecial Weather StatementBOXHampden57 min
Aug 1, 3:40 PM EDTAreal Flood AdvisoryBOXFranklin, Worcester113 min
Aug 1, 3:41 PM EDTSevere Thunderstorm WarningBOXHampden49 min
Aug 1, 3:59 PM EDTSevere Thunderstorm WarningBOXFranklin, Worcester61 min
Aug 1, 4:07 PM EDTFlash Flood WarningBOXFranklin, Worcester82 min
Aug 1, 4:08 PM EDTSpecial Weather StatementBOXEssex67 min
Aug 1, 4:15 PM EDTAreal Flood AdvisoryBOXHampden3 hr
Aug 1, 4:31 PM EDTSevere Thunderstorm WarningBOXFranklin, Worcester27 min
Aug 1, 4:37 PM EDTSpecial Weather StatementBOXFranklin23 min
Aug 1, 4:42 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire, Worcester63 min
Aug 1, 4:55 PM EDTAreal Flood AdvisoryBOXFranklin, Hampshire, Worcester3 hr
Aug 1, 5:29 PM EDTSpecial Weather StatementBOXFranklin31 min
Aug 1, 6:29 PM EDTSpecial Weather StatementBOXHampshire46 min
Aug 1, 4:18 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region29 min
Aug 1, 4:35 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region24 min
Aug 1, 4:45 PM EDTSpecial Weather StatementBOX45 min
Aug 1, 5:10 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region35 min
Aug 1, 6:03 PM EDTSpecial Weather StatementBOX42 min
Aug 1, 1:41 PM EDTSpecial Weather StatementBOXCheshire49 min
Aug 1, 1:55 PM EDTSevere Thunderstorm WarningBOXCheshire43 min
Aug 1, 2:08 PM EDTAreal Flood AdvisoryBOXCheshire, Hillsborough3 hr
Aug 1, 2:42 PM EDTSpecial Weather StatementBOXCheshire48 min
Aug 1, 2:50 PM EDTAreal Flood AdvisoryBOXCheshire2 hr
Aug 1, 3:25 PM EDTSpecial Weather StatementBOXCheshire35 min
Aug 1, 3:38 PM EDTSevere Thunderstorm WarningBOXCheshire, Hillsborough40 min

Nearby

Special Weather Statements in Connecticut, 2011Every special weather statement 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.