Alert archive / Tennessee / Flash Flood Warnings in 1990

Flash Flood Warning 74, NWS Atlanta, GA

December 22, 1990Bledsoe County, Van Buren County, Tennessee

NWS Atlanta, GA issued this flash flood warning at Dec 22, 1990, 1:37 PM CST for Bledsoe County, Van Buren County, Tennessee. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Dec 22, 1990, 1:37 PM CST (19:37 UTC)
Expired: Dec 22, 1990, 6:45 PM CST
In force: 5 hr
Issued by: NWS Atlanta, GA
Area: Whole counties

Counties Bledsoe County, TN, Van Buren County, TN

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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.6 hours before the alert went out and 127 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 35 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 553 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 182 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 KCHA 221941
FFWCHA
TNC007-061-115-121-143-153-175-230045-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE
237 PM EST (137 PM CST) SAT DEC 22 1990
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  745 PM EST (645 PM CST)
FOR PEOPLE IN THE FOLLOWING LOCATIONS
 
IN SOUTHEAST TENNESSEE
 
   ...BLEDSOE COUNTY...GRUNDY COUNTY...MARION COUNTY...MEIGS COUNTY
   ...RHEA COUNTY...SEQUATCHIE COUNTY...VAN BUREN COUNTY
 
...THIS IS A REISSUANCE OF THE WARNINGS FOR MOST OF THESE COUNTIES...
...THIS IS THE FIRST WARNING FOR MEIGS COUNTY...
 
REPORTS FROM AROUND THE AREA CONTINUE TO INDICATE FLOODING IN THESE
COUNTIES. MANY ROADS ARE CLOSED BECAUSE OF WATER AND MUDSLIDES ACROSS
THEM...ESPECIALLY SECONDARY ROADS.  CREEKS AND STREAMS CONTINUE TO
RISE AS THE RAIN CONTINUES TO FALL.  INDICATIONS ARE THAT THE RAIN
WILL CONTINUE OFF AND ON INTO THE NIGHT MAKING FLOOD CONDITIONS EVEN
WORSE.  IF YOU NEED TO TRAVEL INTO THESE COUNTIES THIS AFTERNOON AND
EVENING BE ESPECIALLY ALERT FOR BLOCKED ROADWAYS AND MUD OR ROCK
SLIDES...THIS IS A VERY SERIOUS FLOODING SITUATION IN SOME OF THESE
MOUNTAINOUS COUNTIES.
 
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.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 22, 9:27 AM CST	Flash Flood Warning	FFC	Rhea	4 hr
Dec 22, 10:30 AM CST	Flash Flood Warning	FFC	Bledsoe, Sequatchie, Van Buren	4 hr
Dec 22, 10:30 AM CST	Flash Flood Warning	FFC	Grundy	4 hr
Dec 22, 1:37 PM CST	Flash Flood Warning	FFC	Grundy, Marion, Sequatchie	5 hr
Dec 22, 1:37 PM CST	Flash Flood Warning	FFC	Meigs, Rhea	5 hr

Nearby

Flash Flood Warnings in Tennessee, 1990 Every 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.