Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 290, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Aug 21, 1990, 3:32 PM CDT for Grundy County, Tennessee. It was in force for 43 min.
The area
The counties it named.
The facts
- Issued
- Aug 21, 1990, 3:32 PM CDT (20:32 UTC)
- Expired
- Aug 21, 1990, 4:15 PM CDT
- In force
- 43 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
County Grundy 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, 8.5 hours before the alert went out and 114 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
- 1047 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 1256 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 73 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 212034 SVRCHA TNC061-212115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE 432 PM EDT (332 PM CDT) TUE AUG 21 1990 THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 PM EDT (415 PM CDT) FOR PEOPLE IN THE FOLLOWING LOCATIONS IN SOUTHEAST TENNESSEE ...EASTERN GRUNDY COUNTY AT 430 PM EDT THE CHATTANOGA WEATHER RADAR INDICATED A SEVERE THUNDERSTORM IN EASTERN GRUNDY COUNTY JUST TO THE NORTH OF TRACY CITY. THE STORM IS MOVING SLOWLY TO THE NORTHEAST TOWARD THE PALMER AREA. 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.
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 21, 1:46 PM CDT, 1 hour 46 minutes before
GAZ002-004-211930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATHENS GA 245 PM EDT TUE AUG 21 1990 SEVERE THUNDERSTORM WATCH NUMBER 667 IS IN EFFECT UNTIL 1000 PM EDT FOR PART OF NORTHEAST GEORGIA. THIS WATCH INCLUDES THE COUNTIES OF BANKS...HALL...RABUN...WHITE...ELBERT...HART...STEPHENS FRANKLIN...LUMPKIN...TOWNS...HABERSHAM...MADISON AND UNION. SCATTERED SHOWERS AND THUNDERSTORMS WERE INCREASING OVER NORTH AND CENTRAL GEORGIA. THIS ACTIVITY EXTENDED FROM EXTREME NORTH GEORGIA INTO THE MOUNTAINS OF EASTERN TENNESSEE AND WESTERN NORTH CAROLINA. ANOTHER AREA OF SCATTERED SHOWERS AND THUNDERSTORMS WAS LOCATED ALONG AND EAST OF A LINE FROM COLUMBUS TO ATHERNS GE`ORGIA AND TO GREENVILLE SOUTH CAROLINA. LITTLE MOVEMENT WAS INDICATED.
Special weather statement, Aug 21, 2:00 PM CDT, 1 hour 32 minutes before
GAZ001-003-212100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 301 PM EDT TUE AUG 21 1990 ... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PART OF NORTHERN GEORGIA UNTIL 10 PM ... AT 250 PM...WEATHER SERVICE RADAR SHOWED SHOWERS AND THUNDERSTORMS DEVELOPING RAPIDLY IN NORTHERN AND CENTRAL GEORGIA. THE STRONGEST STORMS WERE LOCATED BETWEEN CHATTNOOGA AND ROME...JUST WEST OF ROCKMARIN POLK COUNTY...NEAR JASPER IN PICKENS COUNTY AND NEAR GRIFFIN IN SPALDING COUNTY. ALL OF THE STORMS WERE DRIFTING SLOWLY NORTHEAST. PERSONS THROUGHOUT NORTH GEORGIA SHOULD REMAIN ALERT FOR THUNDERSTORMS AND BE PREPARED TO TAKE QUICK ACTION IF NECESSARY. DUE TO VERY WARM TEMPERATURES AND THE UNSTABLE ATMOSPHERE..THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON AND EVENING IN THIS AREA OF THE STATE. VERY HEAVY RAIN...FREQUENT AND DANGEROUS CLOUD TO GROUND LIGHTNING...GUSTY WINDS...AND EVEN SOME HAIL CAN BE EXPECTED WITlH THE STRONGER STORMS. PERSONS ARE ADVISED TO STAY TUNED TO NOAA WEATHER RADIO OR LOCAL TV AND RADIO STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Aug 21, 2:34 PM CDT, 58 minutes before
GAZ002-004-212030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATHENS GA 330 PM EDT TUE AUG 21 1990 SEVERE THUNDERSTORM WATCH NUMBER 667 IS IN EFFECT UNTIL 1000 PM EDT FOR PART OF NORTHEAST GEORGIA. THIS WATCH INCLUDES THE COUNTIES OF BANKS...HALL...RABUN...WHITE...ELBERT...HART...STEPHENS FRANKLIN...LUMPKIN...TOWNS...HABERSHAM...MADISON AND UNION. STRONG THUNDERSTORMS WERE INDICATED OVER EXTREME NORTHWEST GEORGIA... NEAR ELBERTON GEORGIA...AND FROM MACON TO MILLEDGEVILLE GEORGIA. ELSEWHERE...SHOWERS AND THUNDERSTORMS WERE SCATTERED OVER NORTHERN AND CENTRAL GEORGIA EXTENDING INTO THE ADJACENT AREAS OF EASTERN ALABAMA...EASTERN TENNESSEE AND THE WESTERN CAROLINAS. LITTLE MOVEMENT WAS INDICATED.
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 2:48 PM CDT | Severe Thunderstorm Warning | FFC | Bradley | 42 min |
| Aug 21, 3:04 PM CDT | Severe Thunderstorm Warning | FFC | Hamilton | 41 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 1990Every 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; the sounding from the Mesonet's radiosonde archive.