Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 21, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 1, 2011, 8:03 PM EDT for Middlesex 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
- Jun 1, 2011, 8:03 PM EDT (00:03 UTC)
- Expired
- Jun 1, 2011, 8:30 PM EDT
- In force
- 27 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Middlesex County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 65 km from the middle of the area, began a volume at 00:04 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 |
|---|---|---|---|
| Jun 1, 7:40 PM EDT | Tornado Watch | SPC | 2 hr |
The nearest sounding before it
Chatham, MA (KCHH), launched 00:00Z, 0.1 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
- 801 J/kg
- Mixed-layer CIN
- -273 J/kg
- Mixed-layer LCL
- 869 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 213 m²/s²
- 0-3 km storm-relative helicity
- 297 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
038 WUUS51 KBOX 020003 SVRBOX MAC017-027-020030- /O.NEW.KBOX.SV.W.0021.110602T0003Z-110602T0030Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 803 PM EDT WED JUN 1 2011 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS... THIS INCLUDES THE CITY OF LEOMINSTER... MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS... THIS INCLUDES THE CITY OF WALTHAM... * UNTIL 830 PM EDT * AT 759 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SHIRLEY...OR NEAR LEOMINSTER...AND WAS MOVING EAST AT 50 MPH. AT 755 PM EDT...TRAINED SPOTTERS REPORTED PENNY-SIZED HAIL ON THE FITCHBURG AND LUNENBURG TOWN LINE. * SOME LOCATIONS IN THE WARNING INCLUDE...GROTON...AYER...HARVARD... BOLTON...BOXBOROUGH...LITTLETON...STOW...WESTFORD...ACTON... MAYNARD...CARLISLE...CONCORD...WAYLAND...BILLERICA...LINCOLN... BEDFORD...WESTON...LEXINGTON AND BURLINGTON. A TORNADO WATCH IS ALSO IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCED WARNING. REMAIN CALM...BUT TAKE COVER NOW. GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT WEDNESDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE AND CENTRAL RHODE ISLAND. && LAT...LON 4253 7114 4233 7122 4247 7181 4264 7174 TIME...MOT...LOC 0001Z 286DEG 44KT 4253 7165 $$ DOODY
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 8:10 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Worcester | 44 min |
| Jun 1, 8:15 PM EDT | Special Weather Statement | BOX | Middlesex | 30 min |
| Jun 1, 8:22 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 38 min |
| Jun 1, 8:39 PM EDT | Special Weather Statement | BOX | Essex, Middlesex, Suffolk | 66 min |
| Jun 1, 8:47 PM EDT | Special Marine Warning | BOX | 58 min | |
| Jun 1, 8:48 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Essex, Middlesex, Norfolk, Plymouth, Suffolk and 1 more | 42 min |
| Jun 1, 8:58 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 32 min |
| Jun 1, 9:03 PM EDT | Special Marine Warning | BOX | 57 min | |
| Jun 1, 9:22 PM EDT | Special Weather Statement | BOX | Dukes | 53 min |
| Jun 1, 9:34 PM EDT | Special Marine Warning | BOX | 56 min | |
| Jun 1, 9:34 PM EDT | Special Weather Statement | BOX | Norfolk, Suffolk | 56 min |
| Jun 1, 9:54 PM EDT | Special Marine Warning | BOX | 50 min | |
| Jun 1, 9:58 PM EDT | Special Marine Warning | BOX | 62 min | |
| Jun 1, 10:53 PM EDT | Special Weather Statement | BOX | Barnstable | 37 min |
| Jun 1, 10:55 PM EDT | Special Marine Warning | BOX | 40 min | |
| Jun 1, 11:49 PM EDT | Special Marine Warning | BOX | 26 min | |
| Jun 1, 11:55 PM EDT | Special Weather Statement | BOX | Nantucket | 50 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.