Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 313, NWS Atlanta, GA

August 22, 1990Bradley County, Tennessee

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 22, 1990, 3:42 PM EDT for Bradley County, Tennessee. It was in force for 48 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 22, 1990, 3:42 PM EDT (19:42 UTC)
Expired: Aug 22, 1990, 4:30 PM EDT
In force: 48 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Bradley County, TN

The radar

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

What was reported inside it

Time	Report	Where	Remark
Aug 22, 4:25 PM EDT	Thunderstorm Wind 0	Bradley, TN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.7 hours before the alert went out and 191 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: 703 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 634 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCHA 221943
SVRCHA
TNC011-222030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE
342 PM EDT WED AUG 22 1990
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  430 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS
 
IN SOUTHEAST TENNESSEE
 
   ...BRADLEY COUNTY
 
AT 335 PM EDT THE CHATTANOOGA WEATHER RADAR INDICATED A SEVERE
THUNDERSTORM MOVING INTO THE NORTHERN SECTIONS OF BRADLEY COUNTY
FROM MCMINN COUNTY.
 
THIS STORM HAS PRODUCED FLOODING...HIGH WINDS AND HAIL IN MCMINN
COUNTY .
 
RESIDENTS OF BRADLEY COUNTY SHOULD BE ALERT FOR RAPIDLY CHANGING
WEATHER CONDITIONS.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
D^ON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 2:53 PM EDT	Severe Thunderstorm Warning	FFC	McMinn	52 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1990 Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.