Alert archive / Tennessee / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 220, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Aug 20, 1993, 5:40 PM EDT for Bradley County, McMinn County, Polk County, Tennessee. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- Aug 20, 1993, 5:40 PM EDT (21:40 UTC)
- Expired
- Aug 20, 1993, 6:30 PM EDT
- In force
- 50 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
Counties Bradley County, TN, McMinn County, TN, Polk County, TN
The nearest sounding before it
Athens Municipal, GA (KAHN), launched 12:00Z, 9.7 hours before the alert went out and 190 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.
- Mixed-layer CAPE
- 1126 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 831 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCHA 202139 RRA SVRCHA TNC011-107-139-202230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHATTANOOGA TN 540 PM EDT FRI AUG 20 1993 THE NATIONAL WEATHER SERVICE IN CHATTANOOGA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST TENNESSEE ...BRADLEY COUNTY...SOUTHERN MCMINN COUNTY...POLK COUNTY AT 535PM EDT WEATHER RADAR INDICATED SEVERE THUNDERSTORMS OVER SOUTHERN MCMINN...NORTHERN AND CENTRAL BRADLEY AND NORTHERN POLK COUNTIES OF SOUTHEAST TENNESSEE. THE THUNDERSTORMS ARE MOVING TOWARD THE SOUTHEAST AT 20 MPH. 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 DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. n
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 20, 5:30 PM EDT, 10 minutes before
GAZ001>GAZ003-202300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 530 PM EDT WED AUG 18 1993 AT 525 PM EDT WEATHER SERVICE RADARS SHOWED WIDELY SCATTERED THUNDER- STORMS WERE DEVELOPING OVER PARTS OF NORTHERN GEORGIA. THE STRONGEST THUNDERSTORM WAS OCCURRING OVER THE NORTHWESTERN PORTION OF CHATTOOGA COUNTY NEAR CLOUDLAND. THESE STORMS WERE MOVING SOUTHEAST AT NEAR 20 MILES AN HOUR. NORTHWEST GEORGIA'S THUNDERSTORMS HAVE DEVELOPED AHEAD OF A LARGER AREA OF SHOWERS AND THUNDERSTORMS THAT STRETCHED FROM NORTH CAROLINA WEST ACROSS TENNESSEE. ANOTHER AREA OF THUNDERSTORMS HAD ALSO DEVELOPED OVER NORTHERN ALABAMA. MOVEMENT ON ALL OF THESE STORMS WAS TO THE SOUTHEAST. WITH THE AFTERNOON HEAT AS FUEL...ADDITIONAL THUNDERSTORMS MAY DEVELOP ACROSS NORTH GEORGIA DURING THE REMAINDER OF DAY AND THIS EVENING. RESIDENTS OF NORTH GEORGIA SHOULD REMAIN ALERT. BE PREPARED TO QUICKLY SEEK SHELTER IF STORMS DEVELOP OR MOVE INTO YBOUR AREA.
Nearby
Severe Thunderstorm Warnings in Tennessee, 1993Every severe thunderstorm warning in 1993
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.