Alert archive / Georgia / Special Weather Statements in 2015

Special Weather Statement, NWS Jacksonville, FL

August 4, 2015Charlton County, Georgia

NWS Jacksonville, FL issued this special weather statement at Aug 4, 2015, 4:15 PM EDT for Charlton County, Georgia. It was in force for 45 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
Aug 4, 2015, 4:15 PM EDT (20:15 UTC)
Expired
Aug 4, 2015, 5:00 PM EDT
In force
45 min
Issued by
NWS Jacksonville, FL

County Charlton County, GA

The radar

The Jacksonville radar (KJAX), 49 km from the middle of the area, began a volume at 20:18 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 12:00Z, 8.3 hours before the alert went out and 207 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 12:00Z on 2015-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 244 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 12:00Z on 2015-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
244 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1406 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
12 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 4, 11:05 AM EDT, 5 hours 10 minutes earlier.

Area forecast discussion, Aug 4, 11:05 AM EDT, 5 hours 10 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1105 AM EDT TUE AUG 4 2015

.UPDATE...THERE IS A BIG MOISTURE GRADIENT ACROSS FORECAST AREA
THIS MORNING PER GOES SOUNDER AND UPPER AIR SOUNDING. PRECIPITABLE
WATER VALUES RANGE FROM 2.33 TO 2.66" ACROSS NE FLORIDA TO 1.50 TO
2" ACROSS INTERIOR SE GEORGIA. WITH THE POOLING OF MOISTURE ALONG
THE SURFACE TROF ACROSS NORTH CENTRAL FL. THIS FEATURE WILL SHIFT
SLIGHTLY NORTH THIS AFTERNOON TOWARD THE I-10 CORRIDOR AND WILL
BE THE MAIN COVERGING FOCUS FOR CONVECTION AND HEAVY RAIN. TYPICAL
MORNING CONVECTION ALONG THE BIG BEND WILL CONTINUE TO TRACK INTO
I-75 CORRIDOR OF NORTH FLORIDA THIS MORNING. THEN THE STORMS WILL
TRACK SLOWLY ACROSS THE REMAINDER OF THE FORECAST AREA DURING THE
AFTERNOON AND EVENING HOURS. THERE IS A POTENTIAL FOR HEAVY
DOWNPOURS THIS AFTERNOON ACROSS THE REGION. ALACHUA COUNTY HAS WET
SOIL CONDITIONS DUE TO A COUPLE SWATHS OF 3 TO 4 INCHES OF HEAVY
RAIN YESTERDAY. ANY HEAVY RAIN OVER THIS AREA...WILL LIKELY LEAD
TO RUNOFF AND MINOR FLOODING OF LOW LYING AREAS THAT DON'T DRAIN
WELL. SOME OF THE STRONGER STORMS WILL CONTAIN GUSTY WINDS TO 45
MPH AND FRQUENT LIGHTNING.

&&

.AVIATION...EARLY TSRA/SHRA OVER GNV. VCTS LATER IN THE
AFTERNOON FOR COASTAL TERMINALS. BRIEF MVFR CIGS AND VSBYS ASSOCIATED
WITH AFTERNOON THUNDERSTORMS. WIND WILL REMAIN SOUTHWESTERLY AWAY
FROM THE IMMEDIATE ATLANTIC COAST.

&&

.MARINE...WINDS WILL DECREASE THROUGH THE DAY DOWN TO AROUND 10 TO 15
KNOTS BY TONIGHT. A RIDGE SLIDES IN AND KEEPS WINDS SOUTHWESTERLY
THROUGH THE PERIOD. A FRONTS APPROACHES LATE IN THE PERIOD AND
BRINGS WITH IT A POSSIBLE RETURN TO CAUTIONARY LEVELS.

RIP CURRENTS: LOW RISK

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  95  75  95  74 /  30  20  40  20
SSI  88  77  90  78 /  40  30  30  20
JAX  90  76  92  74 /  60  30  40  20
SGJ  87  76  91  75 /  80  30  30  20
GNV  87  74  91  73 /  70  30  40  20
OCF  87  74  92  73 /  60  20  50  20

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
GA...NONE.
AM...NONE.
&&

NELSON/CORDERO/GUILLET
Hazardous weather outlook, Aug 4, 3:13 PM EDT, 1 hour 2 minutes before
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In the hours before

Special weather statement, Aug 4, 2:48 PM EDT, 1 hour 27 minutes before
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Special weather statement, Aug 4, 2:56 PM EDT, 1 hour 19 minutes before
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Special weather statement, Aug 4, 3:02 PM EDT, 1 hour 13 minutes before
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Special weather statement, Aug 4, 3:40 PM EDT, 35 minutes before
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Special weather statement, Aug 4, 3:58 PM EDT, 17 minutes before
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Special weather statement, Aug 4, 4:15 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 8:08 PM EDTAreal Flood WarningJAXAlachua3 hr
Aug 3, 8:33 PM EDTAreal Flood AdvisoryJAXAlachua, Bradford, Columbia, Union87 min
Aug 3, 8:34 PM EDTSpecial Weather StatementJAXAlachua41 min
Aug 3, 8:46 PM EDTSpecial Weather StatementJAXPutnam29 min
Aug 3, 11:02 PM EDTAreal Flood AdvisoryJAXSaint Johns88 min
Aug 4, 12:47 AM EDTAreal Flood AdvisoryJAXAlachua88 min
Aug 4, 1:09 AM EDTAreal Flood WarningJAXAlachua2 hr
Aug 4, 6:06 AM EDTAreal Flood AdvisoryJAXDuval, Saint Johns84 min
Aug 4, 1:00 PM EDTSpecial Weather StatementJAXNassau45 min
Aug 4, 2:17 PM EDTSpecial Weather StatementJAXDuval43 min
Aug 4, 2:22 PM EDTSpecial Weather StatementJAXDuval23 min
Aug 4, 2:42 PM EDTAreal Flood AdvisoryJAXDuval, Nassau93 min
Aug 4, 2:45 PM EDTSpecial Marine WarningJAX2 hr
Aug 4, 2:56 PM EDTSpecial Weather StatementJAXDuval34 min
Aug 4, 3:02 PM EDTSpecial Weather StatementJAXDuval43 min
Aug 4, 3:21 PM EDTAreal Flood AdvisoryJAXDuval84 min
Aug 4, 4:58 PM EDTAreal Flood AdvisoryJAXAlachua, Bradford92 min
Aug 4, 5:10 PM EDTSpecial Weather StatementJAXBaker35 min
Aug 4, 5:38 PM EDTSpecial Weather StatementJAXColumbia37 min
Aug 4, 5:57 PM EDTSpecial Weather StatementJAXHamilton33 min
Aug 4, 6:15 PM EDTAreal Flood AdvisoryJAXBaker, Columbia, Union90 min
Aug 4, 7:00 PM EDTAreal Flood WarningJAXColumbia3 hr
Aug 4, 2:48 PM EDTSpecial Weather StatementJAXWare42 min
Aug 4, 3:17 PM EDTSevere Thunderstorm WarningJAXAtkinson, Clinch30 min
Aug 4, 3:40 PM EDTSpecial Weather StatementJAXCharlton35 min
Aug 4, 3:58 PM EDTSpecial Weather StatementJAXClinch32 min

Nearby

Special Weather Statements in Georgia, 2015Every special weather statement 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.