Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 2, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 17, 1991, 5:49 PM EDT for Worcester County, Massachusetts. It was in force for 41 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 17, 1991, 5:49 PM EDT (21:49 UTC)
- Expired
- May 17, 1991, 6:30 PM EDT
- In force
- 41 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Whole counties
County Worcester County, MA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 17, 6:00 PM EDT | Thunderstorm Wind 0 | Worcester, MA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Albany, NY (KALB), launched 12:00Z, 9.8 hours before the alert went out and 162 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1472 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KORH 172149 SVRORH MAC027-172230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WORCESTER MA 549 PM EDT FRI MAY 17 1991 THE NATIONAL WEATHER SERVICE IN WORCESTER HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL MASSACHUSETTS ...NORTHERN WORCESTER COUNTY AT 545PM RADAR INDICATED SEVERE THUNDERSTORM ACTIVITY OCCURING IN NORTHERN WORCESTER COUNTY. HAM RADIO OPERATORS HAVE REPORTED DAMAGING WINDS AND TORRENTIAL RAINS ASSOCIATED WITH THESE STORMS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR Y OUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 17, 5:03 PM EDT, 46 minutes before
MAC027-172200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WORCESTER MA 505 PM EST FRI MAY 17 1991 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 545PM FOR BERKSHIRE COUNTY IN WESTERN MASSACHUSETTS. AT 5PM A LINE OF SHOWERS AND THUNDERSTORMS WAS LOCATED OVER SOUTHERN VERMONT EXTENDING SOUTHWESTWARD THROUGH NORTHERN BERKSHIRE COUNTY AND INTO EASTERN NEW YORK. THESE STORMS ARE MOVING RAPIDLY EAST-SOUTH EAST AT 40-45 MPH AND SHOULD BEGIN TO EFFECT CENTRAL MASSACHUSETTS BY 545PM. A SEVERE THUNDERSTORM WARNING MEANS THAT THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WIND ARE POSSIBLE. IF THREATENING WEATHER APPROACHE S...YOU SHOULD GO INDOORS IMMEDIATELY AND STAY AWAY FROMa WINDOWS. CULLEN
Special weather statement, May 17, 5:14 PM EDT, 35 minutes before
MAC027-172200- SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE WORCESTER MA 505 PM EST FRI MAY 17 1991 A SEVERE THUNDERSTORM WARNING IS IN EFFECT UNTIL 545PM FOR BERKSHIRE COUNTY IN WESTERN MASSACHUSETTS. AT 5PM A LINE OF SHOWERS AND THUNDERSTORMS WAS LOCATED OVER SOUTHERN VERMONT EXTENDING SOUTHWESTWARD THROUGH NORTHERN BERKSHIRE COUNTY AND INTO EASTERN NEW YORK. THESE STORMS ARE MOVING RAPIDLY EAST-SOUTH EAST AT 40-45 MPH AND SHOULD BEGIN TO EFFECT CENTRAL MASSACHUSETTS BY 545PM. A SEVERE THUNDERSTORM WARNING MEANS THAT THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WIND ARE POSSIBLE. IF THREATENING WEATHER APPROACHE S...YOU SHOULD GO INDOORS IMMEDIATELY AND STAY AWAYn FROM WINDOWS. CULLEN
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 5:20 PM EDT | Severe Thunderstorm Warning | BOX | Franklin | 40 min |
| May 17, 6:21 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 69 min |
| May 17, 6:22 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 31 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.