Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 87, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 1, 2011, 3:30 PM EDT for 4 counties in Massachusetts. 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, 3:30 PM EDT (19:30 UTC)
- Expired
- Aug 1, 2011, 4:15 PM EDT
- In force
- 45 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 102 km from the middle of the area, began a volume at 19:32 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 |
|---|---|---|---|
| Aug 1, 3:45 PM EDT | HAIL 1.5 | Belchertown, MA |
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 |
|---|---|---|---|
| Aug 1, 2:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 7.5 hours before the alert went out and 134 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.
963 WUUS51 KBOX 011930 SVRBOX MAC011-013-015-027-012015- /O.NEW.KBOX.SV.W.0087.110801T1930Z-110801T2015Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 330 PM EDT MON AUG 1 2011 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME WEST CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS... EXTREME SOUTHEASTERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS... NORTHEASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS... SOUTHEASTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS... * UNTIL 415 PM EDT * AT 327 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 BELCHERTOWN...AND WAS MOVING EAST AT 15 MPH. DIME SIZED HAIL WAS RECENTLY REPORTED WITH THIS STORM. * SOME LOCATIONS IN THE WARNING INCLUDE...WARE. 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 RHODE ISLAND. && LAT...LON 4227 7220 4219 7223 4223 7246 4235 7243 TIME...MOT...LOC 1930Z 281DEG 11KT 4227 7239 $$ JWD
2 follow-up statements
040 WWUS51 KBOX 011945 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 345 PM EDT MON AUG 1 2011 MAC011-013-015-027-012015- /O.CON.KBOX.SV.W.0087.000000T0000Z-110801T2015Z/ WORCESTER MA-FRANKLIN MA-HAMPSHIRE MA-HAMPDEN MA- 345 PM EDT MON AUG 1 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR NORTHEASTERN HAMPDEN...SOUTHEASTERN HAMPSHIRE...EXTREME SOUTHEASTERN FRANKLIN AND EXTREME WEST CENTRAL WORCESTER COUNTIES... AT 341 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BELCHERTOWN...AND WAS MOVING EAST AT 15 MPH. A SKYWARN SPOTTER REPORTED QUARTER SIZED HAIL IN BELCHERTOWN AT 343 PM. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WARE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE AND RHODE ISLAND. && LAT...LON 4227 7220 4219 7223 4223 7246 4235 7243 TIME...MOT...LOC 1944Z 281DEG 11KT 4226 7233 $$ JWD
338 WWUS51 KBOX 012010 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 410 PM EDT MON AUG 1 2011 MAC011-013-015-027-012020- /O.EXP.KBOX.SV.W.0087.000000T0000Z-110801T2015Z/ WORCESTER MA-FRANKLIN MA-HAMPSHIRE MA-HAMPDEN MA- 410 PM EDT MON AUG 1 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HAMPDEN... SOUTHEASTERN HAMPSHIRE...EXTREME SOUTHEASTERN FRANKLIN AND EXTREME WEST CENTRAL WORCESTER COUNTIES WILL EXPIRE AT 415 PM EDT... 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 4227 7220 4219 7223 4223 7246 4235 7243 TIME...MOT...LOC 2010Z 281DEG 11KT 4224 7222 $$
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, 3:33 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, 4:31 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 27 min |
| 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.