Alert archive / Georgia / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 237, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Sep 1, 2007, 2:38 PM EDT for Camden County, Georgia. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 1, 2007, 2:38 PM EDT (18:38 UTC)
- Expired
- Sep 1, 2007, 3:30 PM EDT
- In force
- 52 min
- Issued by
- NWS Jacksonville, FL
- Area
- Counties, with a storm outline in the text
County Camden County, GA
The radar
The Jacksonville radar (KJAX), 49 km from the middle of the area, began a volume at 18:38 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 12:00Z, 6.6 hours before the alert went out and 47 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
- 2180 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 1, 2:30 PM EDT, 8 minutes earlier.
Area forecast discussion, Sep 1, 2:30 PM EDT, 8 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
230 PM EDT SAT SEP 1 2007
...HEAVY RAINFALL EXPECTED ACROSS THE AREA THRU SUNDAY...
...FLOOD WATCH FOR MUCH OF OUR SE GA ZONES...
.SYNOPSIS...UPPER RIDGE EXTENDS FROM E OF THE BAHAMA TO THE E
GOMEX. WEAK SHORT WAVE OVER THE AREA CONTINUES TO AID IN
CONVECTION ACROSS THE AREA. COMBINATION OF THE SHORT WAVE
ENERGY...LOW-LEVEL CONVERGENCE ALONG STALLED PRE-FRONTAL TROF
OVER SE GA...AND ABUNDANT MOISTURE CONTINUES TO FEED SCATTERED TO
NUMEROUS SHOWERS AND TSTMS ACROSS SE GA WHERE HEAVY RAINFALL HAS
ALREADY OCCURRED TODAY. ISOLD STRONG STORMS ARE BEGINNING TO FORM
AS WELL...FAVORING E EDGE OF EARLIER FOG BANK IN SE GA AND
PORTIONS OF NE FL THAT HAVE HAD LESS CLOUDINESS THRU THE DAY.
RAINFALL AMOUNTS ACROSS MUCH OF SE GA HAVE RANGED FROM 2 TO 5
INCHES OVER THE PAST COUPLE OF DAYS WITH LOCALLY HIGHER AMOUNTS
FROM BLACKSHEAR TO HAZLEHURST.
.SHORT TERM...MAIN THREAT OVER THE NEXT 24 TO 36 HOURS WILL BE
HEAVY RAINFALL. SLOW STORM MOTION WILL INCREASE THE RISK OF
FLOODING...PARTICULARLY ACROSS SE GA. DUE TO RECENT RAINS AND THE
POTENTIAL FOR MORE...HAVE DECIDED TO HOIST A FLOOD WATCH FOR MOST
OF SE GA THRU SUN EVENING. ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4
INCHES ARE LIKELY. THIS WATCH MAY HAVE TO BE EXTENDED...
DEPENDING ON WHETHER SOME SLIGHTLY DRIER LOW AND MID- LEVEL AIR
CAN DIG INTO THE AREA FROM THE NW SUN NIGHT AND MON. HAVE
CONTINUED TO LEAN HIGHER THAN GFS/NAM POPS IN THIS TIME
PERIOD...BUT HAVE SLIGHTLY LOWER POPS ON MON THAN PREVIOUS
PACKAGE. THANX FOR COORD ON FFA CHS AND FFC
ISOLD STRONG STORMS ARE POSSIBLE THRU THE EVENING HOURS...WITH
WIND GUSTS TO 50 MPH POSSIBLE AS WELL AS FREQUENT LTG STRIKES.
TEMPS WILL REMAIN NEAR TO BELOW CLIMO IN THE NEAR TERM...WITH COOLEST
READINGS IN THE MORE PERSISTENT RAIN AREAS. HAVE GENERALLY BLENDED
NAM AND GFS MOS FOR TEMPS AND ADJUSTED DOWN A DEG OR TWO IN AREAS
WITH LIKELY POPS.
.LONG TERM...HAVE MADE FEW CHANGES TO THE EXTENDED GRIDS. TEMPS
WILL REMAIN NEAR TO SLIGHTLY BELOW CLIMO WITH NEAR TO ABOVE NORMAL
POPS. FRONTAL TROF IS PROGGED TO LINGER AND SHIFT SLOWLY S AS HIGH
PRESSURE BUILDS OFF THE MID ATLC OR NEW ENGLAND COAST BY LATE
WEEK.
&&
.AVIATION...WITH LOW PRESSURE NORTH OF THE FL TAF
SITES...CONDITIONS HAVE BECOME LARGELY VFR THIS AFTERNOON WITH
JUST TEMPO MVFR IN TSRA. SSI WILL CONTINUE TO SEE THE BULK OF THE
ACTIVITY THROUGH 00Z WITH A LINE OF TSRA TO MOVE THROUGH THE
TERMINAL AFT 19Z. FOR THE OVERNIGHT PERIOD...EXPECT ANOTHER ROUND
OF PREDOMINANT MVFR TO POSSIBLY IFR AT GNV IN MOIST SOUTHWEST FLOW.
&&
.MARINE...A VERY CHALLENGING FORECAST JUST DUE TO THE POOR MODEL
AGREEMENT IN THE SHORT TERM. AFT 18Z SUNDAY THE MODELS REALLY
DIVERGE WITH THE NAM BUILDING THE HIGH SOUTHWARD AND PRODUCING A
STRONG NORTHEAST FLOW REGIME OVER THE WATERS. MEANWHILE THE GFS
KEEPS THE FLOW LARGELY OFFSHORE AND LIGHT WITH TROUGH AXIS
REMAINING NORTH OF THE WATERS. SINCE I INHERITED EASTERLY FLOW
ALREADY...WILL FAVOR THE NAM FOR NOW AFTER COORD WITH CHS BUT KEEP
SPEEDS WELL BELOW THOSE ADVERTISED BY THE NAM.
&&
.PRELIMINARY POINT TEMPS/POPS...
AMG 72 85 71 87 / 70 70 40 50
SSI 76 84 75 85 / 60 70 50 50
JAX 74 87 73 87 / 50 70 40 60
SGJ 75 87 75 88 / 50 60 30 50
GNV 73 89 72 88 / 50 50 30 60
OCF 73 91 73 90 / 50 50 30 60
&&
.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GA...FLOOD WATCH THROUGH SUNDAY EVENING FOR APPLING-BACON-BRANTLEY-
CHARLTON-COASTAL CAMDEN-COASTAL GLYNN-INLAND CAMDEN-INLAND
GLYNN-JEFF DAVIS-PIERCE-WARE-WAYNE.
AM...NONE.
&&
CARROLL/DEESE/KERNSHazardous weather outlook, Sep 1, 11:50 AM EDT, 2 hours 48 minutes before
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Local storm report, Sep 1, 9:12 AM EDT, 5 hours 26 minutes before
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</html>Special weather statement, Sep 1, 1:25 PM EDT, 1 hour 13 minutes before
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</html>Special weather statement, Sep 1, 1:32 PM EDT, 1 hour 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 132 PM EDT SAT SEP 1 2007 GAZ164-165-011815- CHARLTON-INLAND CAMDEN- 132 PM EDT SAT SEP 1 2007 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR NORTHEASTERN CHARLTON AND WESTERN CAMDEN COUNTIES FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING VALID UNTIL 215 PM EDT... AT 132 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 6 MILES NORTHEAST OF HOMELAND...OR 7 MILES NORTHEAST OF FOLKSTON...MOVING NORTHEAST AT 10 MPH. THIS STRONG THUNDERSTORM WILL ALSO AFFECT AREAS AROUND WOODBINE...TARBORO AND COLESBURG THROUGH 215 PM EDT. HAIL UP TO ONE HALF INCH IN DIAMETER...EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE. HEAVY RAINFALL WILL PRODUCE PONDING OF WATER ON ROADWAYS AND MINOR FLOODING OF LOW-LYING AREAS. REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT. DEESE
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 2:25 PM EDT | Special Marine Warning | JAX | 95 min | |
| Sep 1, 3:12 PM EDT | Special Marine Warning | JAX | 93 min | |
| Sep 1, 4:08 PM EDT | Special Marine Warning | JAX | 97 min | |
| Sep 1, 5:00 PM EDT | Special Marine Warning | JAX | 2 hr | |
| Sep 1, 5:06 PM EDT | Tornado Warning | JAX | Saint Johns | 24 min |
| Sep 1, 5:41 PM EDT | Severe Thunderstorm Warning | JAX | Saint Johns | 34 min |
| Sep 1, 2:28 PM EDT | Flood Watch | JAX | Appling, Bacon, Brantley, Camden, Glynn, Jeff Davis and 2 more | 30 hr |
Nearby
Severe Thunderstorm Warnings in Georgia, 2007Every severe thunderstorm warning 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.