Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 1, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 17, 1991, 5:20 PM EDT for Franklin County, Massachusetts. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- May 17, 1991, 5:20 PM EDT (21:20 UTC)
- Expired
- May 17, 1991, 6:00 PM EDT
- In force
- 40 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Whole counties
County Franklin County, MA
The nearest sounding before it
Albany, NY (KALB), launched 12:00Z, 9.3 hours before the alert went out and 102 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 17 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, 6 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, 5:49 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 41 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; the sounding from the Mesonet's radiosonde archive.