Alert archive / Tennessee / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 32, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Mar 23, 1991, 4:26 AM EST for Hamilton County, Tennessee. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- Mar 23, 1991, 4:26 AM EST (09:26 UTC)
- Expired
- Mar 23, 1991, 5:00 AM EST
- In force
- 34 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
County Hamilton County, TN
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 9.4 hours before the alert went out and 167 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
- 581 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1260 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 394 m²/s²
- 0-3 km storm-relative helicity
- 582 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 6.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCHA 230927 SVRCHA TNC065-231000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE 426 AM EST SAT MAR 23 1991 THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 AM EST FOR PEOPLE IN THE FOLLOWING LOCATIONS IN SOUTHEAST TENNESSEE ...NORTHERN HAMILTON COUNTY AT 425 AM EST THE CHATTANOOGA WEATHER RADAR INDICATED A SEVERE THUNDERSTORM IN NORTHWEST HAMILTON COUNTY...JUST TO THE WEST OF THE SODDY-DAISY AREA. THE STORM IS MOVING TO THE NORTHEAST AT 55 TO 60 MILES PER HOUR. 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, Mar 22, 10:36 PM EST, 5 hours 50 minutes before
GAZALL-230600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 1035 PM EST FRI MAR 22 1991 ...TORNADO WATCH FOR EXTREME NORTHWEST GEORGIA UNTIL 3 AM EST... A TORNADO WATCH CONTINUES IN EFFECT FOR EXTREME NORTHWEST GEORGIA. THE WATCH AREA INCLUDES ROME...DALTON...CHATSWORTH...TRENTON AND SURROUNDING AREAS. AT 1030 PM EST RADAR SHOWED A BAND OF THUNDERSTORMS ACROSS TENNESSEE AND NORTHERN ALABAMA FROM NEAR CROSSVILLE TO NEAR HUNTSVILLE. THESE STORMS ARE EXPECTED TO MOVE EAST INTO THE NORTHWEST CORNER OF GEORGIA AROUND MIDNIGHT OR SHORTLY THEREAFTER. AS THE BAND OF THUNDERSTORMS ADVANCED ACROSS WESTERN TENNESSEE... NORTHERN MISSISSIPPI AND NORTHWEST ALABAMA EARLIER THIS EVENING THERE WERE REPORTS OF HAIL...HIGHS WINDS...AND EVEN TORNADOES. < PEOPLE IN NORTHWEST GEORGIA ARE URGED TO BE PREPARED TO MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES OR IF A WARNING IS ISSUED. STAY ABREAST OF LATEST DEVELOPMENTS BY LISTENING TO REPORTS FROM NEWS MEDIA OR LISTENING TO NOAA WEATHER RADIO.
Special weather statement, Mar 22, 11:38 PM EST, 4 hours 48 minutes before
GAZALL-230700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 1140 PM EST FRI MAR 22 1991 ...TORNADO WATCH FOR EXTREME NORTHWEST GEORGIA UNTIL 3 AM EST... A TORNADO WATCH CONTINUES IN EFFECT FOR EXTREME NORTHWEST GEORGIA. THE WATCH AREA INCLUDES ROME...DALTON...CHATSWORTH...TRENTON AND SURROUNDING AREAS. AT 1135 PM EST RADAR SHOWED A BAND OF THUNDERSTORMS ACROSS TENNESSEE AND NORTHERN ALABAMA FROM NEAR CROSSVILLE TO NEAR HUNTSVILLE. SOME OF THESE STORMS MAY MOVE INTO THE NORTHWEST CORNER OF OF GEORGIA BETWEEN MIDNIGHT AND 3 AM EST. THERE HAS BEEN A SLIGHT DECREASE IN THE STRENGTH OF THE STORMS OVER THE PAST HOUR. HOWEVER...SOME MAY STILL BE CAPABLE OF PRODUCING HAIL...HIGHS WINDS...AND EVEN TORNADOES. < PEOPLE IN NORTHWEST GEORGIA ARE URGED TO BE PREPARED TO MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES OR IF A WARNING IS ISSUED. STAY ABREAST OF LATEST DEVELOPMENTS BY LISTENING TO REPORTS FROM NEWS MEDIA OR LISTENING TO NOAA WEATHER RADIO.
Special weather statement, Mar 23, 12:26 AM EST, 4 hours before
GAZALL-230800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 1225 AM EST SAT MAR 23 1991 ...TORNADO WATCH FOR EXTREME NORTHWEST GEORGIA CANCELLED... THE TORNADO WATCH THAT WAS IN EFFECT FOR EXTREME NORTHWEST GEORGIA HAS BEEN CANCELLED. THE THUNDERSTORMS THAT WERE APPROACHING FROM THE WEST HAVE BEEN STEADILY DECREASING IN INTENSITY OVER THE PAST COUPLE OF HOURS. IN ADDITION THE AIMASS OVER GEORGIA HAS BEEN BECOMING MORE STABLE . THUS IT NOW APPEARS THE THREAT OF SEVERE THUNDERSTORMS AND TORNADOES HAS ENDED.
Special weather statement, Mar 23, 3:48 AM EST, 38 minutes before
GAZALL-231300-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA GA
345 AM EST SAT MAR 23 1991
...TORNADO WATCH FOR NORTHWEST GEORGIA UNTIL 8 AM EST...
A TORNADO WATCH HAS BEEN ISSUED FOR NORTHWEST GEORGIA.
THE WATCH AREA INCLUDES ROME...DALTON...CHATSWORTH...TRENTON...CHATSWORTH
...CARTERSVILLE...BLUERIDGE...DAHLONEGA ANDSURROUNDING AREAS.
AT 345 AM EST RADAR SHOWED A BAND OF THUNDERSTORMS ACROSS EAST TENNESSEE
AND NORTH ALABAMA FROM NEAR KNOXVILLE TO WEST OF BIRMINGHAM.
SOME OF THESE STORMS WILL MOVE INTO THE NORTHWEST
GEORGIA WITHIN THE NEXT HOUR.
THESE STORMS HAVE INCREASED IN STRENGTH IN THE LAST SEVERAL HOURS.
THESE STORMS MAY PRODUCE HAIL...HIGHS WINDS...AND EVEN TORNADOES.
<
PEOPLE IN NORTHWEST GEORGIA ARE URGED TO BE PREPARED TO MOVE TO
A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES OR IF A WARNING
IS ISSUED. STAY ABREAST OF LATEST DEVELOPMENTS BY LISTENING TO
REPORTS FROM NEW S MEDIA OR LISTENING TO NOAA WEATHER RADIO.Special weather statement, Mar 23, 4:06 AM EST, 20 minutes before
GAZ002-231100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATHENS GA 405 AM EST SAT MAR 23 1991 ...TORNADO WATCH NUMBER 62 IS IN EFFECT FOR PART OF NORTH GEORGIA UNTIL 8 AM EST THIS MORNING... IN NORTHEAST GEORGIA THE WATCH AREA INCLUDES THE FOLLOWING COUNTIES... LUMPKIN...DAWSON...AND UNION. AT 345 AM EST RADAR SHOWED A BAND OF THUNDERSTORMS FROM KNOXVILLE TENNESSEE TO BIRMINGHAM ALABAMA. THESE STORMS WILL BE MOVING INTO NORTHWES4T GEORGIA DURING THE NEXT COUPLE OF HOURS. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 11:20 PM EST | Severe Thunderstorm Warning | FFC | Grundy | 40 min |
| Mar 22, 11:45 PM EST | Severe Thunderstorm Warning | FFC | Bledsoe | 45 min |
| Mar 23, 12:12 AM EST | Severe Thunderstorm Warning | FFC | Rhea | 48 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 1991Every severe thunderstorm 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.