Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 92, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 1, 2011, 4:31 PM EDT for Franklin County, Worcester County, Massachusetts. It was in force for 27 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
- Aug 1, 2011, 4:31 PM EDT (20:31 UTC)
- Expired
- Aug 1, 2011, 4:58 PM EDT
- In force
- 27 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Franklin County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 92 km from the middle of the area, began a volume at 20:35 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 |
|---|---|---|---|
| Aug 1, 2:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 8.5 hours before the alert went out and 150 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
- 1159 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
097 WUUS51 KBOX 012031 SVRBOX MAC011-027-012130- /O.NEW.KBOX.SV.W.0092.110801T2031Z-110801T2130Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 431 PM EDT MON AUG 1 2011 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS... EXTREME EAST CENTRAL FRANKLIN COUNTY IN WESTERN MASSACHUSETTS... * UNTIL 530 PM EDT * AT 426 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ORANGE...MOVING SOUTHEAST AT 20 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE...PHILLIPSTON...PETERSHAM... BARRE...HUBBARDSTON...PRINCETON...RUTLAND AND PAXTON. 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. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE AND CENTRAL RHODE ISLAND. && LAT...LON 4244 7182 4229 7194 4250 7230 4262 7224 TIME...MOT...LOC 2030Z 306DEG 21KT 4255 7228 $$ FIELD
1 follow-up statement
543 WWUS51 KBOX 012058 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 458 PM EDT MON AUG 1 2011 MAC011-027-012107- /O.CAN.KBOX.SV.W.0092.000000T0000Z-110801T2130Z/ WORCESTER MA-FRANKLIN MA- 458 PM EDT MON AUG 1 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL FRANKLIN AND CENTRAL WORCESTER COUNTIES IS CANCELLED... AS OF 457 PM...THE STORM WHICH HAD PROMPTED THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL FRANKLIN AND CENTRAL WORCESTER COUNTIES HAD WEAKENED AND NO LONGER POSES A SEVERE THREAT. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE AND CENTRAL RHODE ISLAND. LAT...LON 4244 7182 4229 7194 4250 7230 4262 7224 TIME...MOT...LOC 2057Z 306DEG 21KT 4246 7211 $$ FIELD
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 12:37 PM EDT | Special Weather Statement | BOX | Hampshire | 53 min |
| Aug 1, 1:24 PM EDT | Special Weather Statement | BOX | Hampshire | 51 min |
| Aug 1, 1:27 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampshire, Worcester | 3 hr |
| Aug 1, 1:34 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 19 min |
| Aug 1, 1:41 PM EDT | Flash Flood Warning | BOX | Franklin, Hampshire, Worcester | 3 hr |
| Aug 1, 1:55 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 35 min |
| Aug 1, 2:03 PM EDT | Special Weather Statement | BOX | Franklin | 42 min |
| Aug 1, 2:08 PM EDT | Special Weather Statement | BOX | Hampden | 52 min |
| Aug 1, 2:13 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 47 min |
| Aug 1, 2:19 PM EDT | Flash Flood Warning | BOX | Hampden, Hampshire, Worcester | 116 min |
| Aug 1, 2:19 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 41 min |
| Aug 1, 3:01 PM EDT | Special Weather Statement | BOX | Worcester | 59 min |
| Aug 1, 3:05 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 17 min |
| Aug 1, 3:10 PM EDT | Special Weather Statement | BOX | Franklin | 50 min |
| Aug 1, 3:14 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 38 min |
| Aug 1, 3:18 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 42 min |
| Aug 1, 3:30 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 45 min |
| Aug 1, 3:33 PM EDT | Special Weather Statement | BOX | Hampden | 57 min |
| Aug 1, 3:40 PM EDT | Areal Flood Advisory | BOX | Franklin, Worcester | 113 min |
| Aug 1, 3:41 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 49 min |
| Aug 1, 3:59 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 61 min |
| Aug 1, 4:07 PM EDT | Flash Flood Warning | BOX | Franklin, Worcester | 82 min |
| Aug 1, 4:08 PM EDT | Special Weather Statement | BOX | Essex | 67 min |
| Aug 1, 4:15 PM EDT | Areal Flood Advisory | BOX | Hampden | 3 hr |
| Aug 1, 4:37 PM EDT | Special Weather Statement | BOX | Franklin | 23 min |
| Aug 1, 4:42 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 63 min |
| Aug 1, 4:55 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampshire, Worcester | 3 hr |
| Aug 1, 5:29 PM EDT | Special Weather Statement | BOX | Franklin | 31 min |
| Aug 1, 6:29 PM EDT | Special Weather Statement | BOX | Hampshire | 46 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 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.