Alert archive / Georgia / Tornado Warnings in 2007

Tornado Warning 25, NWS Charleston, SC

September 21, 2007McIntosh County, Georgia

NWS Charleston, SC issued this tornado warning at Sep 21, 2007, 6:30 AM EDT for McIntosh County, Georgia. It was in force for 30 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 21, 2007, 6:30 AM EDT (10:30 UTC)
Expired
Sep 21, 2007, 7:00 AM EDT
In force
30 min
Issued by
NWS Charleston, SC
Area
Counties, with a storm outline in the text

County McIntosh County, GA

The radar

The Jacksonville radar (KJAX), 123 km from the middle of the area, began a volume at 10:32 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

Jacksonville, FL (KJAX), launched 00:00Z, 10.5 hours before the alert went out and 121 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, Jacksonville, FL at 00:00Z on 2007-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2537 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 00:00Z on 2007-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 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
2537 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
634 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
WFUS52 KCHS 211031
TORCHS
GAC191-211100-
/O.NEW.KCHS.TO.W.0025.070921T1030Z-070921T1100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
630 AM EDT FRI SEP 21 2007

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* TORNADO WARNING FOR...
  MCINTOSH COUNTY IN SOUTHEAST GEORGIA...

* UNTIL 700 AM EDT

* AT 630 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR MERIDIAN...
  OR ABOUT 7 MILES NORTHEAST OF DARIEN...MOVING NORTH AT 25 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THE STORM INCLUDE...
  VALONA...MERIDIAN...
  CRESCENT...
  PINE HARBOR...EULONIA...
  SOUTH NEWPORT...
  JONES...

A TORNADO MAY FORM AT ANY TIME. TAKE COVER NOW. ABANDON MOBILE HOMES
AND VEHICLES. MOVE TO AN INTERIOR ROOM OR HALLWAY ON THE LOWEST
FLOOR. STAY AWAY FROM WINDOWS.

LAT...LON 3143 8142 3163 8152 3165 8144 3165 8128
      3163 8124 3144 8132
TIME...MOT...LOC 1030Z 160DEG 24KT 3149 8137

$$
2 follow-up statements
000 
WWUS52 KCHS 211048
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
647 AM EDT FRI SEP 21 2007

GAC191-211100-
/O.CON.KCHS.TO.W.0025.000000T0000Z-070921T1100Z/
MCINTOSH GA-
647 AM EDT FRI SEP 21 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 AM EDT FOR MCINTOSH
COUNTY...

AT 642 AM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS POSSIBLE 
TORNADO WAS LOCATED NEAR VALONA...OR ABOUT 8 MILES NORTHEAST OF 
DARIEN...MOVING NORTH AT 20 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
CRESCENT...EULONIA...JONES...MERIDIAN...PINE HARBOR...SHELLMAN
BLUFF...SOUTH NEWPORT AND VALONA.

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
PENNY SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

TO REPORT SEVERE WEATHER SUCH AS TORNADOES...HAIL...DOWNED 
TREES...LIMBS...AND POWER LINES...PLEASE CONTACT THE CHARLESTON 
NATIONAL WEATHER SERVICE TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR 
REPORTS TO CHS.SKYWARN@NOAA.GOV.

LAT...LON 3163 8152 3163 8151 3165 8144 3164 8143
      3165 8143 3165 8128 3163 8124 3144 8132
      3143 8142
TIME...MOT...LOC 1047Z 161DEG 21KT 3149 8136

$$
000 
WWUS52 KCHS 211055
SVSCHS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
655 AM EDT FRI SEP 21 2007

GAC191-211105-
/O.EXP.KCHS.TO.W.0025.000000T0000Z-070921T1100Z/
MCINTOSH GA-
655 AM EDT FRI SEP 21 2007

...THE TORNADO WARNING FOR MCINTOSH COUNTY WILL EXPIRE AT 700 AM
EDT...

AT 651 AM EDT...RADAR INDICATED THE TORNADIC THUNDERSTORM THAT
PROMPTED THE WARNING WEAKENED...AND WAS NO LONGER CAPABLE OF
PRODUCING TORNADOES OR OTHER SEVERE WEATHER. THE TORNADO WARNING HAS
THEREFORE BEEN ALLOWED TO EXPIRE.

STAY TUNED TO NOAA WEATHER RADIO ALL HAZARDS OR THE LOCAL MEDIA FOR
ADDITIONAL SEVERE WEATHER INFORMATION.

TO REPORT SEVERE WEATHER SUCH AS HAIL...DOWNED TREES...LIMBS...AND
POWER LINES...PLEASE CONTACT THE CHARLESTON NATIONAL WEATHER SERVICE
TOLL FREE AT 1-888-383-2024 OR EMAIL YOUR REPORTS TO
CHS.SKYWARN@NOAA.GOV.

LAT...LON 3163 8152 3163 8151 3165 8144 3164 8143
      3165 8143 3165 8128 3163 8124 3144 8132
      3143 8142
TIME...MOT...LOC 1055Z 161DEG 21KT 3153 8138

$$

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 21, 5:49 AM EDTSevere Thunderstorm WarningCHSMcIntosh56 min
Sep 21, 7:09 AM EDTTornado WarningCHSMcIntosh36 min
Sep 21, 7:22 AM EDTAreal Flood AdvisoryCHSMcIntosh113 min
Sep 21, 7:28 AM EDTSpecial Marine WarningCHS62 min
Sep 21, 7:35 AM EDTSevere Thunderstorm WarningCHSLiberty40 min
Sep 21, 7:52 AM EDTAreal Flood AdvisoryCHSLiberty113 min
Sep 21, 8:22 AM EDTSpecial Marine WarningCHS53 min
Sep 21, 8:58 AM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Liberty47 min
Sep 21, 9:04 AM EDTAreal Flood AdvisoryCHSLiberty116 min
Sep 21, 9:13 AM EDTSpecial Marine WarningCHS62 min
Sep 21, 9:15 AM EDTAreal Flood AdvisoryCHSBryan, Chatham2 hr
Sep 21, 9:34 AM EDTFlash Flood WarningCHSChatham116 min
Sep 21, 9:39 AM EDTSevere Thunderstorm WarningCHSChatham44 min
Sep 21, 10:10 AM EDTSpecial Marine WarningCHS65 min
Sep 21, 11:26 AM EDTFlash Flood WarningCHSChatham2 hr

Nearby

Tornado Warnings in Georgia, 2007Every tornado warning in 2007Tornadoes in 2007

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.