Alert archive / Georgia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 227, NWS Atlanta, GA

July 10, 1990Crawford County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 10, 1990, 7:22 PM EDT for Crawford County, Georgia. It was in force for 48 min.

The area

The counties it named.

The facts

Issued
Jul 10, 1990, 7:22 PM EDT (23:22 UTC)
Expired
Jul 10, 1990, 8:10 PM EDT
In force
48 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Crawford County, GA

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

Athens Municipal, GA (KAHN), launched 12:00Z, 11.4 hours before the alert went out and 151 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.

Skew-T log-pSkew-T log-p diagram, Athens Municipal, GA at 12:00Z on 1990-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 794 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Athens Municipal, GA at 12:00Z on 1990-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -54 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
794 J/kg
Mixed-layer CIN
-134 J/kg
Mixed-layer LCL
1303 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-54 m²/s²
0-3 km storm-relative helicity
-15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMCN 102323
SVRMCN
GAC079-110030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MACON GA
722 PM EDT TUE JUL 10 1990
 
THE NATIONAL WEATHER SERVICE IN MACON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  830 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN CENTRAL GEORGIA
          ...CRAWFORD
 
AT 720 PM WEATHER SERVICE RADAR IN MACON SHOWED A SEVERE THUNDERSTORM
NEAR ROBERTA...MOVING VERY LITTLE.
 
 
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 SHOULD NOT DRIVE INTO LOW WKATER 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 10, 4:47 PM EDT, 2 hours 35 minutes before
GAZALL-110800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA  GA
450 PM EDT TUE JUL 10 1990

              ...EXCESSIVE HEAT CONTINUING...

THE COMBINATION OF HIGH TEMPERATURES AND HUMIDITY PRODUCED HEAT INDEX
VALUES BETWEEN 100 AND 112 DEGREES THIS AFTERNOON. THIS TREND IS EXPECTED
TO CONTINUE ON WEDNESDAY OVER CENTRAL AND SOUTHERN SECTIONS WITH HEAT
INDEX VALUES IN THE 105 TO 110 RANGE.

THE LEVELS OF HEAT AND HUMIDITY PRODUCING THESE HIGH INDICES CAN BE
DANGEROUS TO THOSE WHO DO STRENUOUS EXERCISE OR WORK.

PEOPLE PLANNING TO WORK OR PLAY OUTSIDE ARE ADVISED TO TAKE IT EASY AND
EXERCISE CAUTION. TO HELP REDUCE HEAT RELATED PROBLEMS ASSOCIATED WITH
PROLONGED PHYSICAL ACTIVITY...STAY IN THE SHADE AS MUCH AS POSSIBLE...
DRESS IN LIGHTWEIGHT LIGHT-COLORED CLOTHING... AND DRINK PLENTY OF
WATER OR NON-ALCOHOLIC BEVERAGES EVEN IF YOU DO NOT FEEL THIRSTY.

ELDERLY PERSONS... YOUNG CHILDREN... CHRONIC INVALIDS AND THOSE ON
CERTAIN MEDICATIONA ALONG WITH PERSONS WITH WEIGHT AND ALCOHOL PROBLEMS
ARE PARTICULARLY SUSCEPTIBLE TO HEAT REACTIONS. THESE INDIVIDUALS SHOULD
BE WATCHED OR CHECKED ON PERIODICALLY TO SEE HOW THEY ARE DOING.
Special weather statement, Jul 10, 4:54 PM EDT, 2 hours 28 minutes before
GAZ002-004-102300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATHENS GA
453 PM EDT TUE JUL 10 1990

AT 450 PM EDT A CLUSTER OF THUNDERSTORMS...SOME WITH VERY HEAVY
RAINFALL...HAD DEVELOPED OVER THE NORTH END OF LAKE HARTWELL.
THESE STORMS WERE DRIFTING VERY SLOWLY SOUTH. PERSONS IN STEPHENS
...FRANKLIN AND HART COUNTIES OF NORTHEAST GEORGIA SHOULD BE ON
THE ALERT FOR THE NEXT COUPLE OF HOURS FOR THREATENING WEATHER
CONDITIONS ASSOCIATED WITH THESE STORMS.

BRIEF HEAVY DOWNPOURS...BRIEF GUSTY SURFACE WINDS...DANGEROUSE
FREQUENT CLOUD TO GROUND LIGHTNING AND POSSIBLY SMALL HAIL ARE
POSSIBLE WITH THESE STORMS. BOATERS ESPECIALLY ON LAKE HARTWELL
SHOULD USE EXTREME CAUTION.
Special weather statement, Jul 10, 6:05 PM EDT, 1 hour 17 minutes before
GAZ001-102300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA  GA
604 PM EDT TUE JUL 10 1990

...STRONG THUNDERSTORMS IN EXTREME NORTHWEST GEOREGIA...

SCATTERED THUNDERSTORMS HAVE DEVELOPED OVER EXTREME NORTHWEST GEORGIA
LATE THIS AFTERNOON. AT 555 PM EDT RADAR INDICATED A LINE OF STRONG
THUNDERSTORMS FROM JUST WEST OF CHATSWORTH GEORGIA SOUTHWARD THROUGH
CALHOUN TO ABOUT 10 MILES EAST OF ROME. THIS LINE IS DRIFTING VERY
SLOWLY TOWARD THE EAST.

THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING BRIEF HEAVY RAIN...STRONG
GUSTY WINDS...AND SMALL HAIL. ALSO INTENSE CLOUD TO GROUND LIGHTNING
IS LIKELY. PERSONS IN EXTREME NORTHWEST GEORGIA SHOULD BE ON THE
LOOKOUT FOR THESE STORMS AND FIND SHELTER AS THE STORMS APPROACH.
Special weather statement, Jul 10, 6:19 PM EDT, 1 hour 3 minutes before
GAZ006-008-009-110000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MACON GA
620 PM EDT TUE JUL 10 1990

AT 615 PM WEATHER SERVICE RADAR IN MACON SHOWED THUNDERSTORMS
WIDELY SCATTERED OVER CENTRAL GEORGIA. ONE OF THE STRONGEST
STORMS WAS OVER WARNER ROBINS WHERE MARBLE SIZE HAIL WAS REPORTED
AT 610 PM.

THUNDERSTORMS WILL CONTINUE TO INCREASE OVER THE CENTRAL PART OF THE
STATE THE REST OF THIS AFTERNOON AND INTO THE EVENING HOURS.

STRONG GUSTY WINDS...FREQUENT DEADLY LIGHTNING...AND VERY HEAVY RAIN
WILL OCCUR WITH THESE STORMS. SMALL HAIL IS ALSO LIKELY.

WITH LITTLE OR NO STORM MOVEMENT SOME AREAS WILL RECEIVE LARGE AMOUNTS
OF RAIN IN A SHORT TIME. STREET FLOODING AND FLOODING OF LOW LYING
POOR DRAINAGE AREAS SHOULD BE EXPECTED WITH THE LARGER STORMS.
Special weather statement, Jul 10, 7:02 PM EDT, 20 minutes before
GAZ001-GAZ002-GAZ003-100030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA  GA
700 PM EDT TUE JUL 10 1990

...STRONG THUNDERSTORMS CONTINUE IN EXTREME NORTH GEOREGIA...

AT 655 PM EDT RADAR SHOWED A BAND OF SCATTERED THUNDERSTORMS FROM
JUST WEST OF CARTERSVILLE TO NEAR ELLIJAY AND BLUE RIDGE. SOME OF
THESE STORMS WERE PRODUCING STRONG GUSTY WINDS...HAIL AND LOCALLY
HEAVY DOWNPOURS ALONG WITH FREQUENT CLOUD TO GROUND LIGHTNING.

AT AROUND 640 PM EDT EMERGENCY SERVICES IN FANNIN COUNTY REPORTED
TREES DOWN ON TRAILERS AND ACROSS ROADS IN THE MINERAL BLUFF AREA.
EARLIER THIS AFTERNOON TREES AND POWER LINES WERE KNOCKED DOWN
IN ADIARSVILLE IN BARTOW COUNTY.

PERSONS IN EXTREME NO6RTH GEORGIA SHOULD BE ALERT AND FIND SHELTER
AS STORMS APPROACH. STORMS ARE MOVING SLOWLY TOWARD THE SOUTHEAST.
Special weather statement, Jul 10, 7:14 PM EDT, 8 minutes before
GAZ005-008-012-110015-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBUS GA
714 PM EDT TUE JUL 10 1990

AT 710 WEATHER RADAR IN COLUMBUS INDICATED A LARGE AREA OF RAIN AND A
FEW THUNDERSTORMS OVER WEST...SOUTHWEST AND SOUTHCENTRAL GEORGIA. THE
MOST INTENSE OF THESE STORMS WAS LOCATED IN THE ALBANY AREA.

THESE THUNDERSTORMS WERE MOVING TO THE NORTHWEST AT ABOUT 5 MPH.
BECAUSE OF THEIR SLOW MOVEMENT THEY WILL CAUSE HEAVY DOWNPOURS...SOAME
SMALL HAIL...AND LIGHTNING.

STAY TUNED TO NOAA WEATHER RADIO AND LOCAL TV AND RADIO STATIONS FOR
LATER STATEMENTS OR WARNINGS.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 5:33 PM EDTSevere Thunderstorm WarningFFCCatoosa57 min
Jul 10, 6:22 PM EDTSevere Thunderstorm WarningFFCHouston48 min
Jul 10, 6:32 PM EDTSevere Thunderstorm WarningFFCFannin28 min
Jul 10, 6:53 PM EDTSevere Thunderstorm WarningFFCCrisp52 min
Jul 10, 7:11 PM EDTSevere Thunderstorm WarningFFCBartow, Paulding, Polk49 min

Nearby

Severe Thunderstorm Warnings in Georgia, 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.