Alert archive / Georgia / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 236, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Jul 22, 1990, 6:26 PM EDT for Catoosa County, Walker County, Georgia; Hamilton County, Tennessee. It was in force for 64 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
- Jul 22, 1990, 6:26 PM EDT (22:26 UTC)
- Expired
- Jul 22, 1990, 7:30 PM EDT
- In force
- 64 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
Counties Catoosa County, GA, Walker County, GA, 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 22, 6:45 PM EDT | Thunderstorm Wind 0 | Catoosa, GA | |
| Jul 22, 6:45 PM EDT | Thunderstorm Wind 0 | Walker, GA |
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, 10.4 hours before the alert went out and 183 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
- 456 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 581 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 50 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 222229 SVRCHA GAC047-295-TNC065-222330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE 626 PM EDT SUN JUL 22 1990 THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS IN NORTHWEST GEORGIA ...CATOOSA COUNTY...NORTHERN WALKER COUNTY IN SOUTHEAST TENNESSEE ...HAMILTON COUNTY RADAR INDICATED A SEVERE THUNDERSTORM ALONG THE TENNNESSEE GEORGIA BORDER JUST WEST OF LOOKOUT MOUNTAIN MOVING EAST AT 25 MILES AN 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 22, 1:03 PM EDT, 5 hours 23 minutes before
GAZ001-003-231830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATLANTA GA 100 PM EDT SUN JUL 22 1990 ...THUNDERSTORMS ARE FORMING ACROSS NORTHWEST GEORGIA... AT 1255 PM...NATIONAL WEATHER SERVICE RADAR IN ATLANTA SHOWED THAT THUNDERSTORMS WERE FORMING RAPIDLY ACROSS NORTHWEST GEORGIA. THE STRONGEST STORMS WERE LOCATED NEAR THE TOWNS OF DOUGLASVILLE... MCDONOUGH...DALLAS AND ACWORTH. MOVEMENT WAS EAST AT 20 MPH. THUNDERSTORMS WILL CONTINUE TO DEVELOP IN NORTHWEST GEORGIA THIS AFTERNOON...PRODUCING VERY HEAVY RAINS...GUSTY WINDS POSSIBLY REACHING 40 TO 50 MPH...DANGEROUS CLOUD TO GROUND LIGHTNING AND MAYBE SOME HAIL. PERSONS IN THIS AREA OF THE STATE...ESPECIALLY THOSE PLANNI NG OUTDOOR ACTIVITIES...SHOULD REMAIN ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. IF A THUNDERSTORM OR LIGHTNING IS OBSERVED...DO NOT TAKE SHELTER BENEATH TREES...AND GET OUT OF THE WATER IMMEDIATELY IF YOU ARE SWIMMING.
Special weather statement, Jul 22, 1:23 PM EDT, 5 hours 3 minutes before
GAZ002-004-212245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATHENS GA 115 PM EDT SUN JUL 22 1990 ...THUNDERSTORMS ARE FORMING ACROSS NORTHEAST GEORGIA... NATIONAL WEATHER SERVICE RADAR IN ATHENS SHOWED THAT THUNDERSTORMS WERE DEVELOPING RAPIDLY OVER NORTHEAST GEORGIA AND WILL CONTINUE TO DEVELOP FOR THE REMAINDER OF THIS AFTERNOON AND EARLY EVENING. PERSONS IN NORTHEAST GEORGIA SHOULD REMAIN ALERT FOR VERY HEAVY RAINS.. STRONG GUST$Y WINDS...DANGEROUS CLOUD TO GROUND LIGHTNING...AND POSSIBLE HAIL AS THESE STORMS MOVE TOWARD THE EAST AT 25 MILES AN HOUR.
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 10:31 PM EDT | Flash Flood Warning | FFC | Bradley | 3 hr |
Nearby
Severe Thunderstorm Warnings in Georgia, 1990Severe 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.