Alert archive / Georgia / Flash Flood Warnings in 2002

Flash Flood Warning 17, NWS Tallahassee, FL

September 15, 2002Seminole County, Georgia

NWS Tallahassee, FL issued this flash flood warning at Sep 15, 2002, 3:06 AM EDT for Seminole County, Georgia. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 15, 2002, 3:06 AM EDT (07:06 UTC)
Expired
Sep 15, 2002, 5:00 AM EDT
In force
114 min
Issued by
NWS Tallahassee, FL
Area
Counties, with a storm outline in the text

County Seminole County, GA

The radar

The Tallahassee radar (KTLH), 79 km from the middle of the area, began a volume at 07:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 7.1 hours before the alert went out and 80 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, Tallahassee Rgnl, FL at 00:00Z on 2002-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Tallahassee Rgnl, FL at 00:00Z on 2002-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 square meters per square second.193958Sfc1 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
1 J/kg
Mixed-layer CIN
-133 J/kg
Mixed-layer LCL
1106 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
186 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 
WGUS52 KTAE 150706
FFWTLH
GAC253-150900-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
303 AM EDT SUN SEP 15 2002

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SEMINOLE COUNTY IN GEORGIA
  THIS INCLUDES DONALSONVILLE

* UNTIL 500 AM EDT

* AT 300 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
VERY HEAVY RAIN CONTINUING TO DEVELOP AND MOVE INTO SEMINOLE COUNTY. 
RADAR ESTIMATES OF AN ADDITIONAL 1 TO 3 INCHES OF RAIN MAY FALL OVER 
PORTIONS OF THE COUNTY DURING THE NEXT COUPLE OF HOURS...WHICH WILL 
CONTINUE TO CAUSE FLOODING OF ROADWAYS AND LOW LYING AREAS DUE TO 
THE ALREADY SATURATED GROUND.

* DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE
  ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
  CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED
  QUICKLY. IT ONLY TAKES A FOOT OR TWO OF FLOWING WATER TO SWEEP MOST
  CARS AWAY. REMEMBER...MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.

LAT...LON 3107 8475 3077 8481 3078 8493 3106 8498

.END

17-GOULD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 15, 12:28 AM EDTFlash Flood WarningTAESeminole92 min
Sep 15, 1:04 AM EDTFlash Flood WarningTAEBaker, Early, Miller116 min
Sep 15, 2:37 AM EDTFlash Flood WarningTAEEarly83 min
Sep 15, 4:11 AM EDTTornado WarningTAEMiller, Seminole29 days
Sep 15, 5:05 AM EDTFlash Flood WarningTAEMiller, Seminole115 min

Nearby

Flash Flood Warnings in Georgia, 2002Every flash flood warning in 2002

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; radar from the NEXRAD Level II archive.