Alert archive / Massachusetts / Flash Flood Warnings in 1993
Flash Flood Warning 9, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Apr 1, 1993, 6:10 PM EST for Plymouth County, Massachusetts. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Apr 1, 1993, 6:10 PM EST (23:10 UTC)
- Expired
- Apr 1, 1993, 8:15 PM EST
- In force
- 2 hr
- Issued by
- NWS Boston/Norton, MA
- Area
- Whole counties
County Plymouth County, MA
The nearest sounding before it
Chatham, MA (KCHH), launched 12:00Z, 11.2 hours before the alert went out and 73 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 012312 FFWBOS MAC023-020115- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BOSTON MA 610 PM EST THU APR 1 1993 THE NATIONAL WEATHER SERVICE IN BOSTON HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 815 PM EST FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST MASSACHUSETTS ...PLYMOUTH COUNTY AT 610 PM EST A LINE OF THUNDERSTORMS WITH VERY HEAVY RAINFALL WAS MOVING INTO BRISTOL COUNTY MASSACHUSETTS FROM RHODE ISLAND. THIS LINE WAS MOVING EAST AT 35 MPH AND IS PRODUCING TORRENTIAL RAINFALL AND EVEN SOME HAIL. THIS LINE WILL MOVE INTO PLYMOUTH COUNTY BY 7 PM. SATURATED GROUND FROM PREVIOUS RAINS CANNOT HOLD MUCH MORE WATER. AREAS OF HEAVY RAINFALL WILL PRODUCE FLASH FLOODING. IMMEDIATE ACTION IS REQUIRED TO PROTECT LIFE AND PROPERTY. 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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
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 40 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 39 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 | Essex, Middlesex | 6 hr |
| Apr 1, 5:55 PM EST | Flash Flood Warning | BOX | Norfolk | 6 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.