Alert archive / Tennessee / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 33, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Mar 27, 1991, 8:45 PM CST for Grundy County, Marion County, Sequatchie County, Tennessee. It was in force for 45 min. 2 reports 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
- Mar 27, 1991, 8:45 PM CST (02:45 UTC)
- Expired
- Mar 27, 1991, 9:30 PM CST
- In force
- 45 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
Counties Grundy County, TN, Marion County, TN, Sequatchie County, TN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 27, 9:00 PM CST | Thunderstorm Wind 0 | Sequatchie, TN | |
| Mar 27, 9:00 PM CST | Thunderstorm Wind 0 | Marion, 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 00:00Z, 2.8 hours before the alert went out and 130 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1079 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- -44 m²/s²
- 0-3 km storm-relative helicity
- 114 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 280244 SVRCHA GAC083-TNC061-115-153-280330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE 945 PM EST (845 PM CST) WED MAR 27 1991 THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM EST (930 PM CST) FOR PEOPLE IN THE FOLLOWING LOCATIONS IN NORTHWEST GEORGIA ...DADE COUNTY IN SOUTHEAST TENNESSEE ...GRUNDY COUNTY...MARION COUNTY...SEQUATCHIE COUNTY AT 945PM RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS MOVING EAST AT 40 MILES AN HOUR. THESE THUNDERSTORMS HAVE PRODUCED HAIL...WIND GUSTS IN EXCESS OF 55 MILES AN HOUR...AND HEAVY RAINFALL. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
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 27, 7:51 PM CST, 54 minutes before
GAZ002-280345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATHENS GA 848 PM EST WED MAR 27 1991 ...TORNADO WATCH NUMBER 78 IS IN EFFECT FOR PART OF NORTH GEORGIA UNTIL 2 AM EST THIS MORNING. IN NORTHEAST GEORGIA THE WATCH AREA INCLUDES THE FOLLOWING COUNTIES... RABUN...DAWSON AND UNION. AT 945 PM EST RADAR SHOWED A BAND OF THUNDERSTORMS OVER EAST TENNESSEE AND NORTHEAST ALABAMA BETWEEN CROSSVILLE TENNESSEE AND HUNTSVILLE ALABAMA. eTHESE THUNDERSTORMS WILL BE MOVING INTO NORTH GEORGIA DURING THE NEXT COUPLE HOURS. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVER THUNDERSTORMS IN AND NEAR THE WATCH AREA.
Special weather statement, Mar 27, 7:56 PM CST, 49 minutes before
GAZ002-280345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATHENS GA 848 PM EST WED MAR 27 1991 ...TORNADO WATCH NUMBER 78 IS IN EFFECT FOR PART OF NORTH GEORGIA UNTIL 2 AM EST THIS MORNING. IN NORTHEAST GEORGIA THE WATCH AREA INCLUDES THE FOLLOWING COUNTIES... RABUN...TOWNS AND UNION. AT 945 PM EST RADAR SHOWED A BAND OF THUNDERSTORMS OVER EAST TENNESSEE AND NORTHEAST ALABAMA BETWEEN CROSSVILLE TENNESSEE AND HUNTSVILLE ALABAMA. THESE THUNDERSTORMS WILL BE MOVING INTO NORTH GEORGIA DURING THE NEXT COUPLE HOURS. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVER THUNDERSTORMS IN AND NEAR THE WATCH AREA.
Special weather statement, Mar 27, 8:31 PM CST, 14 minutes before
GAZALL-280400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 930 PM EST WED MAR 27 1991 ...TORNADO WATCH FOR EXTREME NORTH GEORGIA UNTIL 2 AM EST... A TORNADO WATCH CONTINUES FOR EXTREME NORTHERN SECTIONS OF GEORGIA... INCLUDING ROME...DALTON...ELLIJAY...BLAIRSVILLE...CLAYTON...AND SURROUNDING AREAS. AT 925 PM EST RADAR SHOWED A BAND OF THUNDERSTORMS ACROSS EAST TENNESSEE AND NORTH ALABAMA FROM NEAR KNOXVILLE TO NEAR CHATTANOOGA TO NEAR BIRMINGHAM. THESE STORMS WERE MOVING EAST AT ABOUT 50 MPH AND WILL BE MOVING INTO NORTHWEST GEORGIA OVER THE NEXT HOUR. DURING THE EVENING THERE HAVE BEEN REPORTS OF DAMAGING WINDS...HAIL AND TORNADOES WITH SOME OF THE THUNDERSTORMS IN THIS BAND. 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 NOAA WEATHER RADIO...OR TO REPORTS FROM RADIO OR TELEVISION.
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 9:01 PM CST | Severe Thunderstorm Warning | FFC | Meigs, Rhea | 44 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.