Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 46, NWS Jacksonville, FL

April 25, 2015Camden County, Charlton County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 25, 2015, 9:44 PM EDT for Camden County, Charlton County, Georgia. It was in force for 32 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: Apr 25, 2015, 9:44 PM EDT (01:44 UTC)
Expired: Apr 25, 2015, 10:16 PM EDT
In force: 32 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Camden County, GA, Charlton County, GA

The radar

The Jacksonville radar (KJAX), 45 km from the middle of the area, began a volume at 01:45 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 25, 4:07 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 1.7 hours before the alert went out and 43 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1050 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 914 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 332 m²/s²
0-3 km storm-relative helicity: 324 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

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 Apr 25, 8:28 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, Apr 25, 8:28 PM EDT, 1 hour 16 minutes before

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Hazardous weather outlook, Apr 25, 7:00 PM EDT, 2 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
700 PM EDT SAT APR 25 2015

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125-
GAZ132>136-149>154-162>166-260930-
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT
20 NM-
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT
20 NM-
COASTAL WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM-
WATERS FROM ALTAMAHA SOUND GA TO FERNANDINA BEACH FL FROM 20 TO
60 NM-
WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL FROM 20 TO 60 NM-
WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL FROM 20 TO 60 NM-
HAMILTON-SUWANNEE-COLUMBIA-BAKER-INLAND NASSAU-INLAND DUVAL-UNION-
BRADFORD-CLAY-ST. JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-
COASTAL NASSAU-COASTAL DUVAL-COFFEE-JEFF DAVIS-BACON-APPLING-
WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-INLAND GLYNN-COASTAL GLYNN-
ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-COASTAL CAMDEN-
700 PM EDT SAT APR 25 2015

...SEVERE THUNDERSTORM WATCH FOR SOUTHEAST GEORGIA AND THE SUWANNEE
VALLEY UNTIL 11 PM TONIGHT...

...MODERATE RISK OF RIP CURRENTS AT AREA BEACHES...

...SMALL CRAFT ADVISORY LATE THIS EVENING THROUGH SUNDAY MORNING
OFFSHORE...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA...
SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS.

.DAY ONE...THROUGH TONIGHT...

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 11 PM TONIGHT FOR
SOUTHEAST GEORGIA AND THE SUWANNEE VALLEY.

A LINGERING LONG PERIOD OCEAN SWELL WILL KEEP A MODERATE RISK OF
RIP CURRENTS IN PLACE AT AREA BEACHES.

STRENGTHENING OFFSHORE WINDS LATE THIS EVENING WILL CREATE SMALL
CRAFT ADVISORY CONDITIONS FOR THE OFFSHORE COASTAL WATERS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...
SMALL CRAFT ADVISORY CONDITIONS WILL PERSIST IN THE OFFSHORE
COASTAL WATERS THROUGH SUNDAY MORNING.

SCATTERED AFTERNOON THUNDERSTORMS ARE EXPECTED TO DEVELOP ON
SUNDAY AFTERNOON...PRIMARILY IN NORTHEAST AND NORTH CENTRAL
FLORIDA. STRONG TO SEVERE THUNDERSTORMS WILL AGAIN BE
POSSIBLE...WITH DAMAGING WIND GUSTS...HAIL...AND FREQUENT
LIGHTNING STRIKES BEING THE PRIMARY THREATS.

A STRONG DISTURBANCE ALOFT WILL MIGRATE ACROSS THE SOUTHERN STATES
LATE TUESDAY THROUGH WEDNESDAY. ISOLATED AFTERNOON AND EVENING
THUNDERSTORMS ARE POSSIBLE ON MONDAY IN NORTHEAST FLORIDA AND
REGION-WIDE ON TUESDAY IN ADVANCE OF THIS SYSTEM. SCATTERED TO
NUMEROUS THUNDERSTORMS...POSSIBLY STRONG TO SEVERE...ARE POSSIBLE
WEDNESDAY AS LOW PRESSURE MOVES OVER OUR AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS REQUESTED THIS AFTERNOON THROUGHOUT
SOUTHEAST GEORGIA. SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING
AND SUNDAY AFTERNOON IN NORTHEAST AND NORTH CENTRAL FLORIDA.

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

In the hours before

Local storm report, Apr 25, 8:37 PM EDT, 1 hour 7 minutes before

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Local storm report, Apr 25, 8:38 PM EDT, 1 hour 6 minutes before

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Local storm report, Apr 25, 8:40 PM EDT, 1 hour 4 minutes before

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Local storm report, Apr 25, 8:43 PM EDT, 1 hour 1 minute before

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Special weather statement, Apr 25, 8:57 PM EDT, 47 minutes before

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Local storm report, Apr 25, 9:28 PM EDT, 16 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 8:57 PM EDT	Special Weather Statement	JAX	Duval	33 min
Apr 25, 9:01 PM EDT	Special Marine Warning	JAX		59 min
Apr 25, 9:23 PM EDT	Special Marine Warning	JAX		2 hr
Apr 25, 9:54 PM EDT	Special Marine Warning	JAX		21 min
Apr 26, 10:18 AM EDT	Special Weather Statement	JAX	Flagler	27 min
Apr 26, 7:37 PM EDT	Special Marine Warning	JAX		23 min
Apr 25, 8:00 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Bacon, Coffee, Jeff Davis	45 min
Apr 25, 8:23 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Atkinson, Bacon, Brantley, Clinch, Coffee and 2 more	52 min
Apr 25, 8:48 PM EDT	Severe Thunderstorm Warning	JAX	Clinch, Ware	27 min
Apr 25, 8:54 PM EDT	Severe Thunderstorm Warning	JAX	Appling, Wayne	36 min
Apr 25, 9:16 PM EDT	Severe Thunderstorm Warning	JAX	Brantley, Camden, Charlton, Clinch, Glynn, Pierce and 2 more	29 min
Apr 25, 9:47 PM EDT	Special Weather Statement	JAX	Glynn	13 min
Apr 25, 10:18 PM EDT	Special Weather Statement	JAX	Camden	27 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning in 2015

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.