Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 48, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 18, 2012, 2:04 PM EDT for Northeastern Connecticut Planning Region, Connecticut; Hampden County, Hampshire County, Worcester County, Massachusetts. It was in force for 56 min. 3 reports 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
- Jul 18, 2012, 2:04 PM EDT (18:04 UTC)
- Expired
- Jul 18, 2012, 3:00 PM EDT
- In force
- 56 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Northeastern Connecticut Planning Region, CT, Hampden County, MA, Hampshire County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 71 km from the middle of the area, began a volume at 18:03 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 |
|---|---|---|---|
| Jul 18, 2:26 PM EDT | HAIL 1.5 | Southbridge, MA | |
| Jul 18, 2:33 PM EDT | HAIL 0.88 | Oxford, MA | PEA TO NICKEL AT WEBSTER LINE |
| Jul 18, 2:40 PM EDT | HAIL 1 | Union, CT |
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 |
|---|---|---|---|
| Jul 18, 12:20 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 6.1 hours before the alert went out and 161 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
- 2129 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 1491 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
498 WUUS51 KBOX 181804 SVRBOX CTC013-015-MAC013-015-027-181900- /O.NEW.KBOX.SV.W.0048.120718T1804Z-120718T1900Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 204 PM EDT WED JUL 18 2012 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS... EXTREME SOUTHEASTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS... NORTHERN TOLLAND COUNTY IN NORTHERN CONNECTICUT... EXTREME NORTHERN WINDHAM COUNTY IN NORTHERN CONNECTICUT... SOUTHERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS... * UNTIL 300 PM EDT * AT 159 PM EDT...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 CHARLTON...OR 14 MILES SOUTHWEST OF WORCESTER...AND MOVING EAST AT 30 MPH. * THIS SEVERE THUNDERSTORM WILL BE NEAR... CHARLTON...SOUTHBRIDGE...STURBRIDGE AND DUDLEY AROUND 210 PM EDT. WEBSTER AND OXFORD AROUND 215 PM EDT. AUBURN AROUND 220 PM EDT. DOUGLAS AND SUTTON AROUND 230 PM EDT. GRAFTON AROUND 235 PM EDT. NORTHBRIDGE AND WHITINSVILLE AROUND 240 PM EDT. UXBRIDGE AND UPTON AROUND 245 PM EDT. OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE STAFFORD SPRINGS. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH... DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4227 7164 4205 7157 4193 7243 4219 7254 TIME...MOT...LOC 1759Z 269DEG 26KT 4212 7200 $$ FRANK
1 follow-up statement
774 WWUS51 KBOX 181839 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 239 PM EDT WED JUL 18 2012 MAC015-181910- /O.CAN.KBOX.SV.W.0048.000000T0000Z-120718T1900Z/ HAMPSHIRE MA- 239 PM EDT WED JUL 18 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHEASTERN HAMPSHIRE COUNTY IS CANCELLED... THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED/MOVED OUT OF THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED. LAT...LON 4227 7164 4205 7156 4193 7243 4216 7253 TIME...MOT...LOC 1838Z 269DEG 26KT 4212 7166 $$ CTC013-015-MAC013-027-181900- /O.CON.KBOX.SV.W.0048.000000T0000Z-120718T1900Z/ WINDHAM CT-TOLLAND CT-HAMPDEN MA-WORCESTER MA- 239 PM EDT WED JUL 18 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT FOR EXTREME NORTHERN WINDHAM...NORTHERN TOLLAND...EAST CENTRAL HAMPDEN AND SOUTHERN WORCESTER COUNTIES... AT 234 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR WHITINSVILLE...OR 7 MILES WEST OF MILFORD...MOVING EAST AT 30 MPH. THIS SEVERE STORM WILL BE NEAR... UXBRIDGE...NORTHBRIDGE...WHITINSVILLE AND UPTON AROUND 210 PM EDT. OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE STAFFORD SPRINGS. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 4227 7164 4205 7156 4193 7243 4216 7253 TIME...MOT...LOC 1834Z 269DEG 26KT 4212 7166 $$ FRANK
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 12:41 PM EDT | Heat Advisory | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 6 hr |
| Jul 18, 2:21 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 54 min |
| Jul 18, 2:24 PM EDT | Flash Flood Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 3 hr |
| Jul 18, 2:29 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 61 min |
| Jul 18, 2:44 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 61 min |
| Jul 18, 3:46 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 59 min |
| Jul 17, 8:23 PM EDT | Special Weather Statement | BOX | Essex | 67 min |
| Jul 18, 12:37 PM EDT | Special Weather Statement | BOX | Middlesex | 53 min |
| Jul 18, 12:54 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 66 min |
| Jul 18, 1:21 PM EDT | Special Marine Warning | BOX | 84 min | |
| Jul 18, 1:29 PM EDT | Flash Flood Warning | BOX | Essex, Middlesex | 98 min |
| Jul 18, 1:43 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Suffolk | 36 min |
| Jul 18, 1:45 PM EDT | Special Marine Warning | BOX | 60 min | |
| Jul 18, 1:50 PM EDT | Special Weather Statement | BOX | Hampden | 40 min |
| Jul 18, 2:04 PM EDT | Tornado Warning | BOX | Essex, Suffolk | 12 min |
| Jul 18, 2:21 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Suffolk | 39 min |
| Jul 18, 2:30 PM EDT | Special Marine Warning | BOX | 90 min | |
| Jul 18, 2:39 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester | 51 min |
| Jul 18, 3:09 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Worcester | 51 min |
| Jul 18, 4:04 PM EDT | Special Marine Warning | BOX | 56 min | |
| Jul 18, 4:25 PM EDT | Special Marine Warning | BOX | 80 min | |
| Jul 18, 4:42 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Plymouth | 36 min |
| Jul 18, 5:08 PM EDT | Special Weather Statement | BOX | Norfolk, Suffolk | 52 min |
| Jul 18, 5:24 PM EDT | Flash Flood Warning | BOX | Middlesex, Norfolk, Suffolk | 78 min |
| Jul 18, 5:27 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Plymouth, Suffolk | 48 min |
| Jul 18, 5:30 PM EDT | Special Marine Warning | BOX | 54 min | |
| Jul 18, 6:08 PM EDT | Special Marine Warning | BOX | 67 min | |
| Jul 18, 6:27 PM EDT | Special Weather Statement | BOX | Essex | 33 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2012Severe Thunderstorm Warnings in Connecticut, 2012Every severe thunderstorm warning in 2012
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.