Alert archive / Massachusetts / Flash Flood Warnings in 1993
Flash Flood Warning 7, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Apr 1, 1993, 5:55 PM EST for Essex County, Middlesex County, Massachusetts. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Apr 1, 1993, 5:55 PM EST (22:55 UTC)
- Expired
- Apr 2, 1993, 12:00 AM EST
- In force
- 6 hr
- Issued by
- NWS Boston/Norton, MA
- Area
- Whole counties
Counties Essex County, MA, Middlesex County, MA
The nearest sounding before it
Chatham, MA (KCHH), launched 12:00Z, 10.9 hours before the alert went out and 138 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
- NaN m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 313 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 012256 FFWBOS MAC017-009-021-020600- FLOOD WARNING NATIONAL WEATHER SERVICE BOSTON MA 555 PM EST THU APR 1 1993 THE NATIONAL WEATHER SERVICE IN BOSTON HAS ISSUED A FLOOD WARNING FOR TONIGHT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST MASSACHUSETTS ...MIDDLESEX COUNTY ...NORFOLK COUNTY IN NORTHEAST MASSACHUSETTS ...ESSEX COUNTY MORE RAIN...HEAVY AT TIMES...WILL FALL THIS EVENING AND CAUSE ADDITIONAL FLOODING OF SMALL STREAMS AND AREAS WITH POOR DRAINAGE. THE FLOOD WARNING THAT HAS BEEN IN EFFECT FOR NORFOLK AND MIDDLESEX COUNTIES HAS BEEN EXTENDED THROUGH TONIGHT. NORFOLK COUNTY HAS BEEN ADDED SINCE RADAR AND SATELLITE INDICATE MORE HEAVY RAIN WILL LIKELY CAUSE SOME SMALL STREAMS TO GO OVER THEIR BANKS. IN ADDITION...THE NORTHEAST RIVER FORECAST CENTER HAS RIVER FLOOD WARNINGS IN EFFECT FOR A NUMBER OF MAJOR RIVERS...INCLUDING THE CHARLES...NASHUA...MERRIMACK...CONCORD...AND ASSABET RIVERS IN CENTRAL AND EASTERN MASSAdCHUSETTS. A RIVER FLOOD WARNING MAY BE NEEDED LATER FOR THE BLACKSTONE RIVER. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. THOMPSON
What forecasters said that day
The local office's own words before this flash flood 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, Apr 1, 1:30 PM EST, 4 hours 25 minutes before
MAZ003-009-012100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOSTON MA 130 PM EST THU APR 01 1993 ...POTENTIALLY STRONG THUNDERSTORMS MOVING TOWARDS CAPE COD...MARTHAS VINEYARD...AND THE BUZZARDS BAY AREA... WEATHER SERVICE RADAR INDICATED A CLUSTER OF THUNDERSTORMS MOVING TOWARDS THE BUZZARDS BAY AREA AT 125 PM. THESE THUNDERSTORMS MAY PRODUCE STRONG GUSTY WINDS OVER 50 MPH AND TORRENTIAL RAINS AS THEY MOVE ACROSS THE BUZZARDS BAY COASTLINE AND UPPER CAPE AREA BETWEEN 130 AND 230 PM. THE STRONGEST THUNDERSTORMS WERE BETWEEN FALL RIVER AND NEW BEDFORD...AND IN THE VINEYARD SOUND AREA. THE THUNDERSTORMS WERE MOVING NORTHEAST ABOUT 35 MPH. THE COMMUNITIES MOST LIKELY TO BE AFFECTED INCLUDE NEW BEDFORD...WAREHAM...FALMOUTH...BOURNE...AND HYANNIS. DO NOT ATTEMPT TO DRIVE OVER A FLOODED ROAD...AND SEEK PROTECTION IN A SAFE PLACE IF THESE THUNDERSTORMS PRODUCE HIGH WINDS IN YOUR AREA. THOMPSON
Special weather statement, Apr 1, 1:31 PM EST, 4 hours 24 minutes before
MAZ003-009-012100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOSTON MA 130 PM EST THU APR 01 1993 ...POTENTIALLY STRONG THUNDERSTORMS MOVING TOWARDS CAPE COD...MARTHAS VINEYARD...AND THE BUZZARDS BAY AREA... WEATHER SERVICE RADAR INDICATED A CLUSTER OF THUNDERSTORMS MOVING TOWARDS THE BUZZARDS BAY AREA AT 125 PM. THESE THUNDERSTORMS MAY PRODUCE STRONG GUSTY WINDS OVER 50 MPH AND TORRENTIAL RAINS AS THEY MOVE ACROSS THE BUZZARDS BAY COASTLINE AND UPPER CAPE AREA BETWEEN 130 AND 230 PM. THE STRONGEST THUNDERSTORMS WERE BETWEEN FALL RIVER AND NEW BEDFORD...AND IN THE VINEYARD SOUND AREA. THE THUNDERSTORMS WERE MOVING NORTHEAST ABOUT 35 MPH. THE COMMUNITIES MOST LIKELY TO BEP AFFECTED INCLUDE NEW BEDFORD...WAREHAM...FALMOUTH...BOURNE...AND HYANNIS. DO NOT ATTEMPT TO DRIVE OVER A FLOODED ROAD...AND SEEK PROTECTION IN A SAFE PLACE IF THESE THUNDERSTORMS PRODUCE HIGH WINDS IN YOUR AREA. THOMPSON
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 10:55 AM EST | Flash Flood Warning | BOX | Essex, Middlesex | 7 hr |
| Apr 1, 5:47 PM EST | Flash Flood Warning | BOX | Bristol | 118 min |
| Apr 1, 5:55 PM EST | Flash Flood Warning | BOX | Norfolk | 6 hr |
| Apr 1, 6:10 PM EST | Flash Flood Warning | BOX | Plymouth | 2 hr |
Nearby
Flash Flood Warnings in Massachusetts, 1993Every flash flood warning in 1993
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.