Alert archive / Tennessee / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 231, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Jul 11, 1990, 7:11 PM EDT for Hamilton County, Tennessee. It was in force for 64 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
- Jul 11, 1990, 7:11 PM EDT (23:11 UTC)
- Expired
- Jul 11, 1990, 8:15 PM EDT
- In force
- 64 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
County Hamilton 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 |
|---|---|---|---|
| Jul 11, 7:45 PM EDT | Thunderstorm Wind 0 | Hamilton, 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, 11.2 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
- 669 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 942 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- -18 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 112311 SVRCHA TNC065-120015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE 711 PM EDT WED JUL 11 1990 THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 815 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS IN SOUTHEAST TENNESSEE ...HAMILTON COUNTY AT 710 PM EDT THE CHATTANOOGA WEATHER RADAR INDICATED A SEVERE THUNDERSTORM IN WESTERN HAMILTON COUNTY...NEAR THE CITY OF SIGNAL MOUNTAIN. THE STORM IS MOVING TO THE EAST-NORTHEAST AND WILL MOVE OVER PARTS OF CHATTANOOGA DURING THE 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, Jul 11, 2:01 PM EDT, 5 hours 10 minutes before
GAZ005-ALZ011-111900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBUS GA 157 PM EDT WED JUL 11 1990 AT 150 PM EDT WEATHER RADAR IN COLUMBUS INDICATED AN AREA OF THUNDERSTORMS IN EAST CENTRAL ALABAMA AND WEST CENTRAL GEORGIA. THE MOST INTENSE THUNDERSTORMS WERE LOCATED NORTH OF SEALE ALABAMA AND JUST NORTH OF CUSSETA GEORGIA. THESE THUNDERSTORMS WERE MOVING NORTHWEST AT 5 MILES AN HOUR. BECAUSE OF THEIR SLOW MOVEMENT THEY WILL CAU~SE HEAVY DOWNPOURS... SOME SMALL HAIL...AND LIGHTNING. STAY TUNES TO NOAA WEATHER RADIO AND LOCAL RADIO AND TV STATIONS FOR LATER STATEMENTS OR WARNINGS.
Special weather statement, Jul 11, 2:47 PM EDT, 4 hours 24 minutes before
GAZ003-005-112000 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 245 PM EDT WED JUL 11 1990 ...THUNDERSTORMS OVER WEST CENTRAL GEORGIA... AT 245 PM EDT WEATHER SERVICE RADAR INDICATED AN AREA OF SHOWERS AND A FEW THUNDERSTORMS OVER WEST CENTRAL GEORGIA. THE STRONGEST THUNDERSTORM WAS INDICATED 10 MILES NORTH OF WOODBURY IN MERIWETHER COUNTY. THIS CELL WAS MOVING EAST AT 10 MPH AND SHOULD ENTER PIKE COUNTY WITHIN THE HOUR. THESE STORMS MAY BE ACCOMPANIED BY BRIEF HEAVY RAIN...LIGHTNING... GUSTY WIND AND SMALL HAIL. THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER WEST CENTRAL GEORGIA FOR THE NEXT SEVRAL HOURS. PERSONS SHOULD REMAIN TUNED TO NOA WEATHER RADIO FOR UPDATES ON THESE STORMS.
Special weather statement, Jul 11, 3:46 PM EDT, 3 hours 25 minutes before
GAZ006-008-009-112200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MACON GA 345 PM EDT WED JUL 11 1990 AT 340 PM WEATHER SERVICE RADAR IN MACON SHOWED THUNDERSTORMS WERE RAPIDLY DEVELOPING ACROSS CENTRAL GEORGIA. THE STRONGEST WAS WEST OF FORT VALLEY AND PRODUCING HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. THUNDERSTORMS WILL CONTINUE TO INCREASE OVER THE CENTRAL PART OF THE STATE THE REST OF THIS AFTERNOON AND INTO THIS EVENING. STRONG GUSTY WINDS...FREQUENT DEADLY LIGHTNING...AND VERY HEAVY RAIN WILL OCCUR WITH THESE STORMS. SMALL HAIL IS ALSO POSSIBLE. BECAUSE OF THE SLOW MOVEMENT OF THUNDERSTORMS MINOR STREET FLOODING IS ALSO LIKELY. NUMEROUS LIGHTNING STRIKES HAVE BEEN REPORTED AND ARE EXPECTED TO CONTINUE WITH THUNDERSTORMS TODAY...SO LIGHTNING SAFETY RULES SHOULD BE FOLLOWED WHEN THUNDERSTORMS ARE NEARBY.
Special weather statement, Jul 11, 3:47 PM EDT, 3 hours 24 minutes before
GAZ003-005-112100 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 348 PM EDT WED JUL 11 1990 ...THUNDERSTORMS CONTINUE OVER WEST CENTRAL GEORGIA... AT 345 PM EDT WEATHER SERVICE RADAR INDICATED A CLUSTER OF THUNDERSTORMS IN THE LA GRANGE TO ATLANTA TO MACON AREA OF GEORGIA. STRONGEST STORMS WERE NEAR NEWNAN...FAYETTEVILLE...JACKSON AND THOMASTON. THE STORMS WERE MOVING NORTHEAST AT 5 TO 10 MILES AN HOUR. THESE STORMS WILL PRODUCE FREQUENT CLOUD TO GROUND LIGHTNING...GUSTY WINDS ...BRIEF HEAVY RAIN AND POSSIBLE HAIL. THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER WEST CENTRAL GEORGIA FOR THE NEXT SEVRAL HOURS.
Special weather statement, Jul 11, 4:10 PM EDT, 3 hours 1 minute before
GAZ005-011-112215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBUS GA 410 PM EDT WED JUL 11 1990 AT 4:05 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED THUNDERSTORMS DEVELOPING OVER WEST CENTRAL GEORGIA. THE HEAVIEST ACTIVITY WAS JUST SOUTH OF SEALE ALABAMA AND EAST OF TALBOTTON GEORGIA. THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER THE WEST CENTRAL PART OF T STATE THIS AFTERNOON AND EVENING. THESE STORMS MAY CONTAIN HEAVY RAIN ...GUSTY WINDS...AND DANGEROUS LIGHTNING. DUE TO THE SLOW MOVEMENT OF THESE STORMS...MINOR FLOODING OCCUR. STAY TUNED TO NOAA WEATHER RADIO OR OTHER NEWS MEDIA FOR LATER STATEMENTS OR WARNINGS.
Special weather statement, Jul 11, 6:38 PM EDT, 33 minutes before
GAZ002-004-120230- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATHENS GA 630 PM EDT TUE JUL 10 1990 AT 625 PM EDT RADAR INDICATED SEVERAL VERY STRONG THUNDERSTORMS WERE DEVELOPING OVER NORTHEAST GEORGIA. THE STRONGEST STORMS WERE 10 MILES MILES NORTHWEST OF GAINESVILLE AND 5 MILES EAST OF GAINESVILLE. THESE THUNDERSTORMS WERE DRIFTING SLOWLY TOWARD THE NORTHEAST. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...STRONG GUSTY WINDS...FREQUENT CLOUD TO GROUND LIGHTNING AND POSSIBLE SMALL HAIL. PERSONS IN NORTHEAST GEORGIA SHOULD BE ALERT FOR THE NEXT 2 HOURS FOR THREATENING WEATHER AND SHOULD LISTEN TO NOAA WEATHER RADIO OR THEIR FAVORITE RADIO OR TV STATION FOR FURTHER STATEMENTS OR WARNINGS IF CONDITIONS WARRENT.
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:37 PM EDT | Flash Flood Warning | FFC | Hamilton | 2 hr |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.