Alert archive / Maine / Flash Flood Warnings in 1991

Flash Flood Warning 21, NWS Gray, ME

August 20, 1991Franklin County, Somerset County, Maine

NWS Gray, ME issued this flash flood warning at Aug 20, 1991, 12:00 AM EDT for Franklin County, Somerset County, Maine. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 20, 1991, 12:00 AM EDT (04:00 UTC)
Expired
Aug 20, 1991, 3:00 AM EDT
In force
3 hr
Issued by
NWS Gray, ME
Area
Whole counties

Counties Franklin County, ME, Somerset County, ME

The nearest sounding before it

Gray, ME (KPWM), launched 00:00Z, 4.0 hours before the alert went out and 151 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 00:00Z on 1991-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 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 00:00Z on 1991-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.19395878Sfc1 km3 km6 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
569 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
143 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 KPWM 200411 RRA
FFWPWM
MEC001-005-007-001-013-015-017-023-025-027-031-200700-

BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING-CORRECT RAINFALL AMOUNTS
NATIONAL WEATHER SERVICE PORTLAND ME
1200 AM EDT TUE AUG 20 1991

THE NATIONAL WEATHER SERVICE IN PORTLAND HAS ISSUED A
FLOOD WARNING FOR SMALL RIVERS AND STREAMS EFFECTIVE UNTIL 300 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN  MAINE

   ...ANDROSCOGGIN COUNTY...SOUTHERN FRANKLIN COUNTY
   ...SOUTHERN KENNEBEC COUNTY...SOUTHERN SOMERSET COUNTY
   ...CUMBERLAND COUNTY...KNOX COUNTY...LINCOLN COUNTY
   ...SOUTHERN OXFORD COUNTY...SAGADAHOC COUNTY
   ...YORK COUNTY...WESTERN WALDO COUNTY

TROPICAL STORM BOB WAS LOCATED JUST EAST OF BANGOR AT 12 AM AND WAS
MOVING NORTHEAST AT 30 MPH.

SOME FLOODING IS STILL OCCURING IN SOUTHERN AND WESTERN MAINE AND A FEW
ROADS REMAIN CLOSED IN YORK AND CUMBERLAND COUNTIES. WATER LEVELS ON
SMALL RIVERS AND STREAMS WILL BEGIN TO RECEDE OVER THE NEXT 2 TO 3 HOURS.
AS OF MIDNIGHT PORTLAND HAD RECEIVED 7.83 INCHES OF RAIN.

THE RAIN HAS ENDED IN MOST OF SOUTHERN AND WESTERN MAINE. RAIN CONTINUES
TO FALL AT MODERATE TO HEAVY RATES FROM BANGOR NORTH AND EAST.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATE<R 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.

HAWLEY/WSFO PORTLAND

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 8:45 PM EDTFlash Flood WarningGYXAndroscoggin, Cumberland, Oxford, Sagadahoc, York15 min
Aug 19, 8:45 PM EDTFlash Flood WarningGYXKnox, Lincoln, Waldo15 min
Aug 19, 8:45 PM EDTFlash Flood WarningGYXFranklin, Somerset15 min
Aug 20, 12:00 AM EDTFlash Flood WarningGYXKnox, Lincoln, Waldo3 hr
Aug 20, 12:00 AM EDTFlash Flood WarningGYXAndroscoggin, Cumberland, Sagadahoc3 hr
Aug 20, 12:00 AM EDTFlash Flood WarningGYXOxford, York3 hr

Nearby

Flash Flood Warnings in Maine, 1991Every flash flood 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; the sounding from the Mesonet's radiosonde archive.