Alert archive / Georgia / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 233, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Jul 12, 1990, 4:31 PM EDT for Catoosa County, Georgia; Bradley County, Tennessee. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1990, 4:31 PM EDT (20:31 UTC)
- Expired
- Jul 12, 1990, 5:30 PM EDT
- In force
- 59 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
Counties Catoosa County, GA, Bradley 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 190 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
- 101 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 44 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 122036 SVRCHA GAC047-TNC011-122130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHATTANOOGA TENNESSEE 431 PM EDT THU JUL 12 1990 THE NATIONAL WEATHER SERVICE IN CHATTANOOGA TENNESSEE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS IN NORTHWEST GEORGIA ...CATOOSA COUNTY IN SOUTHEAST TENNESSEE ...BRADLEY COUNTY AT 430 PM EDT THE CHATTANOOGA WEATHER RADAR INDICATED A SEVERE THUNDERSTORM IN THE WESTERN SECTIONS OF CATOOSA COUNTY IN NORTHWEST GEORGIA...AND IN THE WESTERN SECTION OF BRADLEY COUNTY IN SOUTHEAST TENNESSEE. THE THUNDERSTORMS ARE MOVING TO THE SOUTHEAST AT 20 MPH. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOU$LD NOT DRIVE INTO LOW WATER CROSSINGS.
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 12, 12:04 PM EDT, 4 hours 27 minutes before
GAZ002-004-111900-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATHENS GA
1203 PM EDT THU JUL 12 1990
AT NOONTIME RADAR SHOWED AN INCREASE IN THUNDERSTORM ACTIVITY BOTH
IN INTENSTIES AND AREAL COVERAGE. THIS WILL CONTINUE THROUGH THE
AFTERNOON HOURS. PEOPLE IN NORTHEAST GEORGIA SHOULD REMAIN ALERT
FOR BRIEF HEAVY DOWNPOURS...STRONG GUSTY SURFACE WINDS...FREQUENT
CLOUD TO GROUND LIGHTNING AND POSSIBLE SMALL HAIL.
BOATERS AND OTHERS INVOLVE{D IN AQUATIC RECREATION SHOULD BE ESPECIALLY
CAUTIOUS OF QUICK BUILDING STORMS THAT WILL MOVE ACROSS THE RIVERS
AND LAKES OF NORTHEAST GEORGIA THIS AFTERNOON.Special weather statement, Jul 12, 12:23 PM EDT, 4 hours 8 minutes before
GAZ002-004-121900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ATHENS GA 1203 PM EDT THU JUL 12 1990 AT NOONTIME RADAR SHOWED AN INCREASE IN THUNDERSTORM ACTIVITY BOTH IN INTENSTIES AND AREAL COVERAGE. THIS WILL CONTINUE THROUGH THE AFTERNOON HOURS. PEOPLE IN NORTHEAST GEORGIA SHOULD REMAIN ALERT FOR BRIEF HEAVY DOWNPOURS...STRONG GUSTY SURFACE WINDS...FREQUENT CLOUD TO GROUND LIGHTNING AND POSSIBLE SMALL HAIL. BOATERS AND OTHERS INVOLVED IN AQUATIC RECREATION SHOULD BE ESPECIALLY CAUTIOUS OF QUICK BUILDING STORMS THAT WILL MOVE ACROSS THE RIVERS AND LAKES OF NORTHEAST GEORGIA THIS AFTERNOON.
Special weather statement, Jul 12, 12:24 PM EDT, 4 hours 7 minutes before
GAZ001-003-111900
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA GA
1225 PM EDT THU JUL 12 1990
...THUNDERSTORMS CONTINUE OVER NORTHWEST GEORGIA...
NUMEROUS SHOWERS WITH SCATTERED THUNDERSTORMS HAVE DEVELOPED OVER THE
NORTHWEST DURING THE PAST HOUR. A CONCENTRATION OF THUNDERSHOWERS WERE
OVER CHEROKEE COUNTY. A SHORT LINE EXTENDED WEST INTO BARTOW AND FLOYD
COUNTIES. ANOTHER LINE EXTENDED SOUTH FROM CHEROKEE COUNTY INTO COBB AND
DOUGLAS COUNTIES. A SMALL CONCENTRATION OF THUNDERSHOWERS WERE OVER
TROUP AND COWETA COUNTIES. AFTER DEVELOPMENT THE STORMS WERE MOVING
NORTHEAST AT 30 MPH.
PERSONS IN NORTHWEST GEORGIA SHOULD BE ALERT FOR RAPIDLY CHANGING
WEATHER CONDITIONS THIS AFTERNOON AND INTO TONIGHT AS THUNDERSHOWERS
WILL CONTINUE TO DEVELOP AND AFFECT MUCH OF THE NORTHWEST THIS
AFTERNOON.Special weather statement, Jul 12, 3:34 PM EDT, 57 minutes before
GAZ002-004-122125- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE ATHENS GA 325 PM EDT THU JUL 12 1990 THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH NUMBER 618 VALID UNTIL 930 PM EDT THIS THURSDAY EVENING. THIS WATCH IN GEORGIA MAINLY EAST OF A LINE FROM HARTWELL TO ATHENS TO MONROE. SHOWERS AND THUNDERSTORMS CONTINUED OVER MUCH OF THE NORTH THIRD OF GEORGIA...THE WESTERN CAROLINAS...EAST ALABAMA AND EAST TENNESSEE. SHOWERS WERE WIDELY SCATTERED OVER SOUTH GEORGIA AND THUNDERSTORMS WERE ISOLATED. HEAVIEST RAINFALL IN GEORGIA WAS JUST SOUTH OF CHATTANOOGA TENNESSEE AND NORTH TO NORTHEAST OF ATLANTA. MOVEMENT NORTHEAST 30 MILES AN HOUR.
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 6:44 PM EDT | Severe Thunderstorm Warning | FFC | Laurens | 46 min |
| Jul 12, 4:00 PM EDT | Severe Thunderstorm Warning | FFC | Hamilton | 60 min |
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; the sounding from the Mesonet's radiosonde archive.