Alert archive / Massachusetts / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 13, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 12, 1991, 3:32 PM EDT for Essex County, Massachusetts. It was in force for 43 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
- Jun 12, 1991, 3:32 PM EDT (19:32 UTC)
- Expired
- Jun 12, 1991, 4:15 PM EDT
- In force
- 43 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Whole counties
County Essex County, MA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 3:42 PM EDT | Thunderstorm Wind 0 | Essex, 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
Chatham, MA (KCHH), launched 12:00Z, 7.5 hours before the alert went out and 131 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
- 1044 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 108 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 KBOS 121931 SVRBOS MAC009-122015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BOSTON MA 332 PM EDT WED JUN 12 1991 THE NATIONAL WEATHER SERVICE IN BOSTON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST MASSACHUSETTS ...NORTHERN ESSEX COUNTY AND THE ADJACENT COASTAL WATERS. AT 325 PM...A POTENTIALLY SEVERE THUNDERSTORM IN SOUTHEAST NEW HAMPSHIRE WILL GRAZE THE NORTH PART OF ESSEX COUNTY BY 350 PM. THE TOWNS OF HAVERHILL... AMESBURY... NEWBURYPORT AND ROWLEY MAY HAVE DAMAGING WIND WITH NUMEROUS TREES DOWN AS WELL AS POWER OUTAGES AND VERY HEAVY RAIN. THIS THUNDERSTORM IS LIKELY TO CAUSE VERY STRONG WINDS FROM THE MERRIMAC RIVER TO NEAR GLOUCESTER BETWEEN 340 AND 415 PM. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRI~CAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. MARINE INTERESTS SHOULD SEEK SAFE SHELTER IMMEDIATELY NEAR NEWBURYPORT. DRAG
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, Jun 12, 9:50 AM EDT, 5 hours 42 minutes before
MAZALL-CTZALL-RIZALL-121900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOSTON MA 1000 AM EDT WED JUN 12 1991 ...STRONG THUNDERSTORMS ARE LIKELY IN SOUTHERN NEW ENGLAND TODAY... THE LATEST WEATHER CHARTS INDICATE THAT CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF STRONG THUNDERSTORMS OVER MUCH OF NEW ENGLAND THIS AFTERNOON AND EVENING. THESE THUNDERSTORMS WILL LIKELY BE ACCOMPANIED BY HAIL...STRONG GUSTY WINDS...BRIEF HEAVY RAIN...AND OF COURSE...DANGEROUS LIGHTNING. IF YOU ARE PLANNING OUTDOOR ACTIVITIES IN SOUTHERN NEW ENGLAND THIS AFTERNOON AND EVENING...BE ALERT FOR THREATENING WEATHER AND TAKE SHELTER IF THUNDERSTORMS APPROACH OR WARNINGS ARE ISSUED. FURTHER STATEMENTS WILL BE ISSUED AS NEEDED. WATLING
Special weather statement, Jun 12, 12:23 PM EDT, 3 hours 9 minutes before
MAZALL-CTZALL-RIZALL-122200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOSTON MA 1220 PM EDT WED JUN 12 1991 ...SEVERE THUNDERSTORMS ARE LIKELY IN SOUTHERN NEW ENGLAND THIS AFTERNOON AND EVENING... CONDITIONS ARE BECOMING MORE FAVORABLE FOR SEVERE WEATHER TO DEVELOP OVER SOUTHERN NEW ENGLAND THIS AFTERNOON AND THIS EVENING. SEVERE THUNDERSTORMS HAVE ALREADY BROKEN OUT OVER CENTRAL NEW YORK STATE...WITH REPORTS OF NICKEL SIZED HAIL AND DOWNED POWER LINES. THESE STORMS ARE HEADING EAST AT 30 MPH AND WILL LIKELY MOVE INTO SOUTHERN NEW ENGLAND THIS AFTERNOON. THESE THUNDERSTORMS COULD HAVE LARGE HAIL...STRONG WIND GUSTS...BRIEF HEAVY DOWNPOURS...AND OF COURSE DANGEROUS LIGHTNING. IF YOU ARE PLANNING OUTDOOR ACTIVITIES IN SOUTHERN NEW ENGLAND THIS AFTERNOON AND EVENING...WATCH OUT FOR THREATENING WEATHER AND TAKE IMMEDIATE SHELTER IF THUNDERSTORMS APPROACH OR WARNINGS ARE ISSUED. FURTHER STATEMENTS WILL BE I&SSUED AS NEEDED. WATLING
Special weather statement, Jun 12, 1:18 PM EDT, 2 hours 14 minutes before
MAZALL-CTZALL-RIZALL-130100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOSTON MA 115 PM EDT WED JUN 12 1991 ...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR ALL OF SOUTHERN NEW ENGLAND INCLUDING THE COASTAL WATERS UNTIL 9 PM TONIGHT... SEVERE THUNDERSTORM WATCH NUMBER 510 HAS BEEN ISSUED FOR ALL OF SOUTHERN NEW ENGLAND INCLUDING THE COASTAL WATERS UNTIL 9 PM TONIGHT. A SEVERE THUNDERSTORM WATCH MEANS THAT WINDS IN EXCESS OF 58 MPH AND HAIL 3/4 INCH IN DIAMETER IS POSSIBLE WITHIN THE WATCH AREA. WEATHER CONDITIONS CONTINUE TO EVOLVE...MAKING THE CHANCE OF SEVERE THUNDERSTORMS MORE LIKELY. SEVERE THUNDERSTORMS HAVE ALREADY BROKEN OUT OVER CENTRAL NEW YORK STATE...WITH REPORTS OF NICKEL SIZED HAIL AND DOWNED POWER LINES. THESE STORMS ARE HEADING EAST AT 30 MPH AND WILL LIKELY MOVE INTO WESTERN MASSACHUSETTS BY 2 OR 3 PM THIS AFTERNOON...THEN SPREAD OVER EASTERN PORTIONS OF THE REGION THEREAFTER. ADDITIONALLY...THESE THUNDERSTORMS WILL HAVE BRIEF HEAVY RAIN AND DANGEROUS LIGHTNING. IF YOU ARE PLANNING OUTDOOR ACTIVITIES IN SOUTHERN NEW ENGLAND THIS AFTERNOON AND EVENING...WATCH OUT FOR THREATENING WEATHER AND TAKE IMMEDIATE SHELTER IF THUNDERSTORMS APPROACH OR WARNINGS ARE ISSUED. FURTHER STATEMENTS WILL BE ISSUED AS NEEDED. WATLING
Special weather statement, Jun 12, 1:44 PM EDT, 1 hour 48 minutes before
RIZALL-130100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PROVIDENCE RI 144 PM EDT WED JUN 12 1991 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR RHODE ISLAND UNTIL 9 PM... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF RHODE ISLAND...AS WELL AS THE REMAINDER OF SOUTHERN NEW ENGLAND AND ALL COASTAL WATERS UNTIL 9 PM TONIGHT. A SEVERE THUNDERSTORM WATCH MEANS THAT WINDS IN EXCESS OF 58 MPH AND HAIL 3/4 INCH IN DIAMETER IS POSSIBLE WITHIN THE WATCH AREA. WEATHER CONDITIONS CONTINUE TO EVOLVE...MAKING THE CHANCE OF SEVERE THUNDERSTORMS MORE LIKELY. SEVERE THUNDERSTORMS HAVE ALREADY BROKEN OUT OVER CENTRAL NEW YORK STATE...WITH REPORTS OF NICKEL SIZED HAIL AND DOWNED POWER LINES. THESE STORMS ARE HEADING EAST AT 30 MPH AND WILL LIKELY MOVE INTO WESTERN MASSACHUSETTS BY 2 TO 3 PM...THEN SPREAD INTO THE OCEAN STATE DURING THE EVENING RUSH HOUR. . ADDITIONALLY...THESE THUNDERSTORMS WILL HAVE BRIEF RAIN AND DANGEROUS LIGHTNING. IF YOU ARE PLANNING OUTDOOR ACTIVITIES IN RHODE ISLAND THIS AFTERNOON AND EVENING...WATCH OUT FOR THREATENING WEATHER AND TAKE IMMEDIATE SHELTER IF THUNDERSTORMS STRIKE. MARINERS ON NARRAGANSETT BAY MAY WANT TO STAY CLOSE TO PORT...AN#D BE PREPARED TO HEAD TO HARBOR IMMEDIATELY. VALLEE
Special weather statement, Jun 12, 2:32 PM EDT, 1 hour before
CTZALL-MAZ005-122000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARTFORD CT 232 PM EDT WED JUN 12 1991 ...THE SEVERE THUNDERSTORM WATCH FOR ALL OF CONNECTICUT AND WESTERN MASSACHUSETTS... A LINE OF THUNDERSTORMS MOVING THROUGH THE BERKSHIRE COUNTY IN MASSACHUSETTS IS MOVING EAST AT 35 MILES AN HOUR AND WILL REACH HAMPEN COUNTY DURING THE NEXT HOUR. THESE THUNDERSTORMS COULD HAVE LAGER HAIL...STRONG WIND GUSTS AND HEAVY DOWNPOURS AND OF COURSE DANGEROUS LIGTNING. IF YOU ARE PLANNING OUTDOOR ACTIVITIES THIS AFTERNOON...WATCH PUT FOR THREATENING WEATHER AND TAKE IMMEDIATE SHELTER IF THREATENING WEATHER APPROACH. WOODARD
Special weather statement, Jun 12, 3:18 PM EDT, 14 minutes before
CTZALL-MAZ005-12 00-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARTFORD CT
PM EDT WED JUN 12 1991
...THE SEVERE THUNDERSTORM WATCH FOR ALL OF CONNECTICUT AND WESTERN
MASSACHUSETTS IS IN EFFECT UNTIL 9 PM TONIGHT...
A LINE OF THUNDERSTORMS FROM MANCHESTER NEW HAMPSHIRE TO KINGSTON
NEW YORK MOVING EAST AT 30 MILES AN HOUR
REPORTS OF WIND AROUND 40 MILES AN HOUR AND SMALL HAIL HAS BEEN
REPORTED IN HAMPEN COUNTY AT 310 PM
IF YOU ARE PLANNING OUTDOOR ACTIVITIES THIS AFTERNOON...WATCH OUT FOR
THREATENING WEATHER AND TAKE IMMEDIATE SHELTER IF THREATENING WEATHER
APPROACH.
WOODARDThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 2:42 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 33 min |
| Jun 12, 2:53 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 52 min |
| Jun 12, 3:11 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 64 min |
| Jun 12, 4:13 PM EDT | Severe Thunderstorm Warning | BOX | Norfolk | 62 min |
| Jun 12, 4:13 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 36 min |
| Jun 12, 4:24 PM EDT | Severe Thunderstorm Warning | BOX | Suffolk | 25 min |
| Jun 12, 4:33 PM EDT | Severe Thunderstorm Warning | BOX | Plymouth | 42 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.