Alert archive / New Hampshire / Flash Flood Warnings in 1990

Flash Flood Warning 5, NWS Gray, ME

August 7, 1990Merrimack County, New Hampshire

NWS Gray, ME issued this flash flood warning at Aug 7, 1990, 6:53 PM EDT for Merrimack County, New Hampshire. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Aug 7, 1990, 6:53 PM EDT (22:53 UTC)
Expired
Aug 7, 1990, 11:00 PM EDT
In force
4 hr
Issued by
NWS Gray, ME
Area
Whole counties

County Merrimack County, NH

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 10.9 hours before the alert went out and 132 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, Gray, ME at 12:00Z on 1990-08-07Temperature 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, Gray, ME at 12:00Z on 1990-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
3599 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
62 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 KCON 072255
FFWCON
NHC013-080300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE CONCORD NH
653 PM EDT TUE AUG 7 1990
 
THE NATIONAL WEATHER SERVICE IN CONCORD HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL 1100 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL NEW HAMPSHIRE
          ...WESTERN MERRIMACK
 
AT 645 PM...A WEATHER OBSERVER IN WESTERN MERRIMACK COUNTY REPORTED
WATER FROM VARIOUS STREAMS WAS BEGINNING TO RUN OVER RT 114 FROM
NORTH SUTTON TO BRADFORD. SOME OF THE SHOULDERS OF THE ROADS
WERE BEING UNDERMINED BY THE RUNNING WATER.  THE STATE HIGHWAY
DEPARTMENT ALSO REPORT VARIOUS WATER RELATED ROAD PROBLEMS AROUND
THE DANBURY AREA.
 
WITH MORE RAIN EXPECTED THIS EVENING...EXPECT FURTHER FLOODING
PROBLEMS FROM RISING WATER ON SMALL RIVERS AND STREAMS.
 
 
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.

The office that day

Everything else NWS Gray, ME issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 6:00 PM EDTFlash Flood WarningGYXGrafton5 hr

Nearby

Flash Flood Warnings in New Hampshire, 1990Every flash flood warning in 1990

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.