Alert archive / Massachusetts / Flash Flood Warnings in 1998

Flash Flood Warning 8, NWS Boston/Norton, MA

February 24, 1998Middlesex County, Norfolk County, Massachusetts

NWS Boston/Norton, MA issued this flash flood warning at Feb 24, 1998, 9:17 PM EST for Middlesex County, Norfolk County, Massachusetts. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 24, 1998, 9:17 PM EST (02:17 UTC)
Expired
Feb 25, 1998, 6:00 AM EST
In force
9 hr
Issued by
NWS Boston/Norton, MA
Area
Whole counties

Counties Middlesex County, MA, Norfolk County, MA

The nearest sounding before it

Chatham, MA (KCHH), launched 00:00Z, 2.3 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.

Skew-T log-pSkew-T log-p diagram, Chatham, MA at 00:00Z on 1998-02-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 00:00Z on 1998-02-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
539 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KBOS 250218
FFWBOS
MAC005-017-021-023-251110-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
917 PM EST TUE FEB 24 1998

THE NATIONAL WEATHER SERVICE IN TAUNTON MA HAS EXTENDED A
FLOOD WARNING EFFECTIVE UNTIL 600 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN NORTHEASTERN MASSACHUSETTS

   ...MIDDLESEX COUNTY

IN EASTERN MASSACHUSETTS

   ...NORFOLK COUNTY

IN SOUTHEASTERN MASSACHUSETTS

   ...BRISTOL MA COUNTY
   ...PLYMOUTH COUNTY

SMALL STREAMS THROUGHOUT THE WARNING AREA IN EASTERN AND
SOUTHEASTERN MASSACHUSETTS CONTINUE TO RUN NEAR BANKFULL.
ADDITIONAL RAIN OVERNIGHT COMBINED FROM EARLIER HEAVY RAIN WILL
LIKELY CAUSE SOME SMALL STREAMS TO OVERFLOW THEIR BANKS.

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

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 24, 9:17 PM ESTFlash Flood WarningBOXBristol, Plymouth9 hr

Nearby

Flash Flood Warnings in Massachusetts, 1998Every flash flood warning in 1998

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.