Alert archive / Georgia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 77, NWS Jacksonville, FL

May 17, 2009Camden County, Glynn County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at May 17, 2009, 3:59 PM EDT for Camden County, Glynn County, Georgia. It was in force for 46 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
May 17, 2009, 3:59 PM EDT (19:59 UTC)
Expired
May 17, 2009, 4:45 PM EDT
In force
46 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Camden County, GA, Glynn County, GA

The radar

The Jacksonville radar (KJAX), 66 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 64 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 12:00Z on 2009-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1194 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, Jacksonville, FL at 12:00Z on 2009-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
1194 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
682 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 May 17, 3:55 PM EDT, 4 minutes earlier.

Area forecast discussion, May 17, 3:55 PM EDT, 4 minutes before
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Hazardous weather outlook, May 17, 5:04 AM EDT, 10 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
504 AM EDT SUN MAY 17 2009

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-180915-
HAMILTON-SUWANNEE-COLUMBIA-BAKER-NASSAU-DUVAL-UNION-BRADFORD-CLAY-
ST JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-COFFEE-
JEFF DAVIS-BACON-APPLING-WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-
INLAND GLYNN-COASTAL GLYNN-ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-
COASTAL CAMDEN-
504 AM EDT SUN MAY 17 2009

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

.DAY ONE...TODAY AND TONIGHT...

...ISOLATED SEVERE STORMS POSSIBLE THIS AFTERNOON...
...MODERATE RISK OF RIP CURRENTS FOR FLORIDA WATERS...

A COLD FRONT IS EXPECTED TO APPROACH THE AREA LATE TODAY WITH
INCREASING THUNDERSTORM CHANCES...ESPECIALLY FOR THE GEORGIA
PORTION. WITH THE ATMOSPHERE REMAINING MOIST AND UNSTABLE...ANY
STORMS THAT DEVELOP WILL BE CAPABLE OF BECOMING STRONG TO POSSIBLY
SEVERE WITH HAIL AND STRONG WINDS THE MAIN CONCERNS. ACTIVITY WILL
BE MORE SCATTERED IN NATURE OVER THE FLORIDA PORTION THIS
AFTERNOON BUT ISOLATED SEVERE STORMS WILL ALSO BE POSSIBLE AS
THUNDERSTORMS DEVELOP INLAND AND THEN WORK THEIR WAY BACK TOWARD
THE COAST IN THE EVENING HOURS.

THERE WILL BE A MODERATE RISK OF RIP CURRENTS FOR THE FLORIDA
WATERS. PLEASE REFER TO THE LATEST SURF ZONE FORECAST FOR FURTHER
DETAILS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

...GALE WATCH IN EFFECT FOR MONDAY AND TUESDAY FOR THE COASTAL
WATERS...

AS THE COLD FRONT SLIDES SOUTH OF THE AREA...HIGH PRESSURE WILL
BUILD TO THE NORTH AND PROVIDE FOR A STRENGTHENING NORTHEAST FLOW
REGIME. MOST OF THE ASSOCIATED HAZARDS WILL BE IN THE MARINE
ENVIRONMENT...BUT SHOWERS WILL INCREASE IN COVERAGE OVER THE
MAINLAND...ESPECIALLY OVER THE FLORIDA COASTAL SECTIONS WHERE
ISOLATED THUNDERSTORMS WILL BE POSSIBLE AS WELL.

LOW PRESSURE DEVELOPING SOUTH OF THE REGION IS EXPECTED TO TRACK
WESTWARD AND INTO THE GULF OF MEXICO. DEPENDING UPON WHETHER IT
TRACKS INTO THE CENTRAL OR EASTERN GULF IS DIFFICULT TO DETERMINE
AT THIS POINT BUT WILL HAVE RAMIFICATIONS ON OUR SENSIBLE WEATHER.
SHOULD IT TRACK INTO THE EASTERN GULF SHOWERS AND THUNDERSTORMS
WILL CONTINUE TO BE PREVALENT THROUGH WEEKS END WITH A MORE
WESTWARD TRACK LEADING TO DRIER CONDITIONS. THESE DETAILS WILL BE
REFINED WITH SUBSEQUENT FORECASTS AS THE EVENT DRAWS CLOSER.

AN ELEVATED RISK OF RIP CURRENTS WILL EXIST THROUGH EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

SPOTTER ACTIVATION IS NOT REQUESTED AT THIS TIME.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE
IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX.

In the hours before

Special weather statement, May 17, 3:12 PM EDT, 47 minutes before
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Special weather statement, May 17, 3:34 PM EDT, 25 minutes before
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Special weather statement, May 17, 3:39 PM EDT, 20 minutes before
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Special weather statement, May 17, 3:48 PM EDT, 11 minutes before
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Special weather statement, May 17, 3:49 PM EDT, 10 minutes before
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Special weather statement, May 17, 3:56 PM EDT, 3 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 9:06 PM EDTSpecial Weather StatementJAXMarion39 min
May 17, 4:57 AM EDTSmall Craft AdvisoryJAX30 hr
May 17, 12:51 PM EDTSpecial Weather StatementJAXSuwannee39 min
May 17, 1:21 PM EDTSpecial Weather StatementJAXColumbia39 min
May 17, 1:33 PM EDTSevere Thunderstorm WarningJAXColumbia, Suwannee41 min
May 17, 1:56 PM EDTSpecial Weather StatementJAXColumbia49 min
May 17, 2:30 PM EDTSpecial Weather StatementJAXHamilton45 min
May 17, 2:57 PM EDTSpecial Weather StatementJAXFlagler48 min
May 17, 3:17 PM EDTSpecial Marine WarningJAX118 min
May 17, 3:39 PM EDTSpecial Weather StatementJAXFlagler36 min
May 17, 3:56 PM EDTSpecial Weather StatementJAXMarion34 min
May 17, 4:17 PM EDTSpecial Weather StatementJAXMarion28 min
May 17, 4:19 PM EDTSpecial Weather StatementJAXMarion26 min
May 17, 4:41 PM EDTSpecial Weather StatementJAXAlachua34 min
May 17, 4:43 PM EDTSpecial Weather StatementJAXPutnam32 min
May 17, 4:45 PM EDTSevere Thunderstorm WarningJAXNassau45 min
May 17, 4:48 PM EDTSpecial Marine WarningJAX117 min
May 17, 5:04 PM EDTSpecial Weather StatementJAXAlachua26 min
May 17, 5:08 PM EDTSevere Thunderstorm WarningJAXDuval, Nassau30 min
May 17, 5:09 PM EDTSpecial Marine WarningJAX96 min
May 17, 5:13 PM EDTSpecial Weather StatementJAXPutnam32 min
May 17, 5:22 PM EDTSpecial Weather StatementJAXAlachua38 min
May 17, 5:27 PM EDTSpecial Weather StatementJAXAlachua33 min
May 17, 5:43 PM EDTSpecial Weather StatementJAXAlachua, Bradford, Clay32 min
May 17, 5:52 PM EDTAreal Flood AdvisoryJAXDuval53 min
May 17, 5:58 PM EDTSpecial Weather StatementJAXMarion32 min
May 17, 6:10 PM EDTSpecial Weather StatementJAXClay35 min
May 17, 6:13 PM EDTSpecial Weather StatementJAXAlachua32 min
May 17, 6:26 PM EDTSpecial Weather StatementJAXMarion34 min
May 17, 6:43 PM EDTSevere Thunderstorm WarningJAXClay47 min
May 17, 6:56 PM EDTSpecial Weather StatementJAXMarion34 min
May 17, 7:03 PM EDTSpecial Weather StatementJAXDuval27 min
May 17, 7:25 PM EDTSpecial Weather StatementJAXPutnam35 min
May 17, 7:32 PM EDTSpecial Weather StatementJAXSaint Johns28 min
May 17, 7:34 PM EDTSpecial Weather StatementJAXClay26 min
May 17, 7:58 PM EDTSpecial Weather StatementJAXFlagler, Putnam32 min
May 17, 12:43 PM EDTSpecial Weather StatementJAXPierce32 min
May 17, 12:58 PM EDTSpecial Weather StatementJAXPierce47 min
May 17, 1:27 PM EDTSpecial Weather StatementJAXJeff Davis48 min
May 17, 1:34 PM EDTSpecial Weather StatementJAXPierce56 min
May 17, 2:07 PM EDTSpecial Weather StatementJAXAppling38 min
May 17, 2:46 PM EDTSevere Thunderstorm WarningJAXAppling29 min
May 17, 2:55 PM EDTSpecial Weather StatementJAXGlynn50 min
May 17, 3:12 PM EDTSpecial Weather StatementJAXClinch, Echols63 min
May 17, 3:15 PM EDTSevere Thunderstorm WarningJAXGlynn30 min
May 17, 3:34 PM EDTSpecial Weather StatementJAXCamden41 min
May 17, 3:48 PM EDTSpecial Weather StatementJAXAtkinson, Brantley, Ware42 min
May 17, 3:49 PM EDTSpecial Weather StatementJAXGlynn26 min
May 17, 4:25 PM EDTSpecial Weather StatementJAXCamden50 min
May 17, 4:28 PM EDTSpecial Weather StatementJAXBrantley, Pierce47 min
May 17, 5:11 PM EDTSpecial Weather StatementJAXAtkinson34 min
May 17, 5:45 PM EDTSpecial Weather StatementJAXAtkinson, Coffee45 min
May 17, 6:12 PM EDTSpecial Weather StatementJAXAppling, Bacon48 min
May 17, 6:32 PM EDTAreal Flood AdvisoryJAXAtkinson, Coffee118 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2009Every severe thunderstorm warning in 2009

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.