Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 16, NWS Jacksonville, FL

February 21, 2014Alachua County, Clay County, Putnam County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Feb 21, 2014, 11:35 AM EST for Alachua County, Clay County, Putnam County, Florida. It was in force for 40 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
Feb 21, 2014, 11:35 AM EST (16:35 UTC)
Expired
Feb 21, 2014, 12:15 PM EST
In force
40 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Alachua County, FL, Clay County, FL, Putnam County, FL

The radar

The Jacksonville radar (KJAX), 86 km from the middle of the area, began a volume at 16:37 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.

IssuedProductOfficeLasted
Feb 21, 6:39 AM ESTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 4.6 hours before the alert went out and 87 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 2014-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 968 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 2014-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 square meters per square second.193958Sfc1 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
968 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.3

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 Feb 21, 10:08 AM EST, 1 hour 27 minutes earlier.

Area forecast discussion, Feb 21, 10:08 AM EST, 1 hour 27 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1008 AM EST FRI FEB 21 2014

...SEVERE STORMS ONGOING OVER SE GA...

.UPDATE...A PRE-FRONTAL SQUALL LINE OF SEVERE STORMS WAS TREKKING
RAPIDLY EASTWARD OVER SE GA WITH SPEEDS 40-50 MPH. BOWING LINE SEGMENTS
HAVE PRODUCED WIND DAMAGE OVER COFFEE COUNTY. MODERATE ROTATION IN
COUPLETS ALONG BOWING SEGMENTS WILL CONTINUE TO SUPPORT AN
ISOLATED TORNADO THREAT. EXTENDED THE SEVERE TSTORM WATCH EASTWARD
FOR ALL OF SE GA AND TO INCLUDE NASSAU COUNTY. WILL LIKELY NEED TO
ADD MORE NE FL COUNTIES TO THE WATCH AS THE LINE MOVES FARTHER
EAST.

&&

.AVIATION...

DETERIORATING CONDITIONS TO MVFR EXPECTED AT ALL SITES AS SQUALL
LINE BLOWS THROUGH GENERALLY BETWEEN 17Z-21Z TODAY. STRONG LOW
LEVEL JET OF 40-45 KTS FROM SW WILL CONTINUE BUMPY CONDITIONS IN
THE LOWER LEVELS. CONTINUED TO SHOW GUSTS TO 40 KT POSSIBLE AS
SQUALL LINE MOVES THROUGH.

&&

.MARINE...A MARINE WEATHER STATEMENT WAS ISSUED TO ALERT MARINERS
OF THE SQUALL LINE PUSHING OFFSHORE OF THE SE GA COAST BY MIDDAY
AND THE FL COAST DURING THE EARLY AFTN HOURS. A SMALL CRAFT
EXERCISE CAUTION CONTINUES FOR THE OFFSHORE WATERS DUE TO
SOUTHERLY WINDS 15-20 KTS AND SEAS UP TO 6 FT IN THE GULF STREAM.

RIP CURRENTS: LOW RISK TODAY AND SAT.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  70  43  70  47 / 100  10  10  10
SSI  72  52  65  51 / 100  20  10  10
JAX  77  50  70  51 / 100  30  10  10
SGJ  77  56  66  56 / 100  40  20  10
GNV  76  54  73  53 / 100  40  20  10
OCF  79  57  75  56 / 100  40  20  10

&&

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

ENYEDI/TRABERT/SHASHY/NELSON/SANDRIK/WALKER
Hazardous weather outlook, Feb 21, 6:42 AM EST, 4 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
642 AM EST FRI FEB 21 2014

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-
GAZ132>136-149>154-162>166-221100-
ALTAMAHA SOUND GA TO FERNANDINA BEACH FL OUT 20 NM-
FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20 NM-
ST AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM-
ALTAMAHA SOUND GA TO FERNANDINA BEACH FL 20 NM TO 60 NM OFFSHORE-
FERNANDINA BEACH TO ST AUGUSTINE FL 20 NM TO 60 NM OFFSHORE-
ST AUGUSTINE TO FLAGLER BEACH FL 20 NM TO 60 NM OFFSHORE-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-
642 AM EST FRI FEB 21 2014

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 2 PM...

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

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

PATCHY DENSE FOG THIS MORNING...GENERALLY ALONG AND EAST OF A LINE
FROM OCALA TO ST AUGUSTINE.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR INLAND SOUTHEAST
GEORGIA...AND THE SUWANNEE VALLEY OF NORTHEAST FLORIDA UNTIL 2 PM.

A STRONG COLD FRONT WILL PUSH ACROSS THE REGION TODAY WITH
WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS. A FEW STORMS MAY
BECOME STRONG TO SEVERE WITH DAMAGING WIND GUSTS POSSIBLE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

ISOLATED THUNDERSTORMS WILL BE POSSIBLE ON SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUESTED AS WATCHES ARE ISSUED TODAY.

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

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE IS CONSIDERING THE
DISCONTINUANCE...OR REDUCED ISSUANCE...OF THIS PRODUCT. PLEASE
FORWARD COMMENTARY ON THE HAZARDOUS WEATHER OUTLOOK PRODUCT TO
OUR METEOROLOGIST IN CHARGE...SCOTT CORDERO...AT
SCOTT.CORDERO@NOAA.GOV. THIS WILL IN NO WAY AFFECT NOAA WEATHER
RADIO...BUT ONLY PERTAINS TO THE HAZARDOUS WEATHER OUTLOOK
PRODUCT WHICH SUMMARIZES ADVISORIES...WATCHES...AND WARNINGS
WHICH ARE ALREADY IN EFFECT.

In the hours before

Local storm report, Feb 21, 11:15 AM EST, 20 minutes before
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Special weather statement, Feb 21, 11:21 AM EST, 14 minutes before
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Local storm report, Feb 21, 11:23 AM EST, 12 minutes before
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Special weather statement, Feb 21, 11:28 AM EST, 7 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Local storm report, Feb 21, 11:29 AM EST, 6 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1129 AM EST FRI FEB 21 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1030 AM     TSTM WND DMG     3 E ODUM                31.66N 81.97W
02/21/2014                   WAYNE              GA   EMERGENCY MNGR

            EMA SURVEYED DAMAGE WITH NOTED METAL SHED DAMAGED WITH 10
            TO 12 TREES DOWN. DAMAGE AREA ABOUT 100 YARDS WIDE AND
            100 YARDS LONG. LOCATED NEAR WILLIAMS ROAD AND TANK ROAD.
            TIME ESTIMATED FROM RADAR.

&&
THIS IS AN UPDATE OF THE DAMAGE REPORTED IN CENTRAL WAYNE COUNTY.

ARS
Special weather statement, Feb 21, 11:31 AM EST, 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1131 AM EST FRI FEB 21 2014

FLZ022>025-030>032-035-036-GAZ165-166-211715-
ALACHUA-BAKER-BRADFORD-CLAY-COASTAL
CAMDEN-COLUMBIA-DUVAL-GILCHRIST-INLAND CAMDEN-NASSAU-UNION-
1131 AM EST FRI FEB 21 2014

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR NORTHWESTERN
CLAY...BRADFORD...SOUTHERN BAKER...ALACHUA...SOUTHERN COLUMBIA...
GILCHRIST...UNION...SOUTHERN CAMDEN...DUVAL AND NASSAU COUNTIES FOR
STRONG WINDS AND FUNNEL CLOUDS VALID UNTIL 1215 PM EST...

AT 1131 AM EST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS CENTERED ALONG A LINE EXTENDING FROM 8 MILES
NORTH OF KINGS FERRY TO 6 MILES NORTH OF MACCLENNY TO 17 MILES
NORTHWEST OF BELL...MOVING EAST AT 40 MPH. THESE STRONG THUNDERSTORMS
WILL ALSO AFFECT AREAS AROUND OLUSTEE...HILLIARD...SANDERSON...KINGS
FERRY...MACCLENNY...LULU...GLEN SAINT MARY...CALLAHAN...BRYCEVILLE
AND BELL THROUGH 1215 PM EST. GUSTY WINDS OF 45 TO 55 MPH CAN BE
EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE. DOPPLER RADAR HAS
INDICATED WEAK ROTATION WITHIN THIS STORM. TORNADOES MAY DEVELOP WITH
LITTLE OR NO ADVANCE WARNING. IF FURTHER INTENSIFICATION OCCURS A
WARNING MAY BE REQUIRED.

REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 PM EST FRIDAY
AFTERNOON FOR NORTHEASTERN FLORIDA AND SOUTHEAST GEORGIA.

LAT...LON 2952 8256 2958 8278 2958 8296 2982 8294
      2991 8286 2997 8276 3002 8279 3033 8221
      3037 8218 3037 8204 3056 8200 3063 8203
      3090 8189 3095 8140 3075 8145 3070 8142
      3051 8144 3038 8139
TIME...MOT...LOC 1631Z 273DEG 33KT 3089 8181 3036 8209
          2989 8304

NELSON

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 21, 9:26 AM ESTSevere Thunderstorm WarningJAXHamilton, Suwannee49 min
Feb 21, 9:58 AM ESTSpecial Weather StatementJAXColumbia, Gilchrist, Suwannee47 min
Feb 21, 10:06 AM ESTSpecial Weather StatementJAXBradford, Clay, Union39 min
Feb 21, 10:10 AM ESTSevere Thunderstorm WarningJAXBaker, Columbia, Hamilton, Suwannee50 min
Feb 21, 10:39 AM ESTSpecial Marine WarningJAX2 hr
Feb 21, 10:49 AM ESTSpecial Weather StatementJAXColumbia, Gilchrist, Suwannee, Union41 min
Feb 21, 10:51 AM ESTSpecial Weather StatementJAXBradford, Duval, Nassau39 min
Feb 21, 10:58 AM ESTSpecial Marine WarningJAX2 hr
Feb 21, 10:59 AM ESTSpecial Weather StatementJAXBaker31 min
Feb 21, 11:21 AM ESTSpecial Weather StatementJAXClay39 min
Feb 21, 11:31 AM ESTSpecial Weather StatementJAXAlachua, Bradford, Duval, Gilchrist, Nassau, Union44 min
Feb 21, 11:58 AM ESTSpecial Weather StatementJAXDuval47 min
Feb 21, 12:10 PM ESTTornado WarningJAXPutnam35 min
Feb 21, 12:16 PM ESTSpecial Weather StatementJAXClay44 min
Feb 21, 12:19 PM ESTSpecial Weather StatementJAXAlachua41 min
Feb 21, 12:29 PM ESTSpecial Marine WarningJAX2 hr
Feb 21, 12:43 PM ESTSevere Thunderstorm WarningJAXSaint Johns47 min
Feb 21, 12:48 PM ESTSpecial Weather StatementJAXClay42 min
Feb 21, 1:02 PM ESTSpecial Weather StatementJAXAlachua, Clay, Putnam43 min
Feb 21, 1:28 PM ESTSevere Thunderstorm WarningJAXSaint Johns17 min
Feb 21, 1:34 PM ESTSpecial Weather StatementJAXFlagler41 min
Feb 21, 1:44 PM ESTSpecial Weather StatementJAXPutnam, Saint Johns46 min
Feb 21, 2:01 PM ESTSpecial Weather StatementJAXCitrus44 min
Feb 21, 2:13 PM ESTSevere Thunderstorm WarningJAXFlagler, Saint Johns47 min
Feb 21, 2:21 PM ESTSpecial Marine WarningJAX54 min
Feb 21, 2:33 PM ESTSpecial Weather StatementJAXMarion42 min
Feb 21, 3:15 PM ESTSpecial Weather StatementJAXMarion45 min
Feb 21, 4:02 PM ESTSpecial Weather StatementJAXMarion43 min
Feb 21, 8:46 AM ESTSevere Thunderstorm WarningJAXBacon, Coffee, Jeff Davis44 min
Feb 21, 9:05 AM ESTSevere Thunderstorm WarningJAXAtkinson, Coffee, Ware40 min
Feb 21, 9:28 AM ESTSevere Thunderstorm WarningJAXAppling, Bacon, Coffee, Jeff Davis, Pierce, Ware and 1 more47 min
Feb 21, 9:40 AM ESTSpecial Weather StatementJAXJeff Davis35 min
Feb 21, 9:45 AM ESTSpecial Weather StatementJAXPierce30 min
Feb 21, 10:07 AM ESTSevere Thunderstorm WarningJAXAppling, Bacon, Brantley, Glynn, Pierce, Ware and 1 more38 min
Feb 21, 10:19 AM ESTTornado WarningJAXCharlton, Clinch, Ware26 min
Feb 21, 10:46 AM ESTSpecial Weather StatementJAXBrantley, Glynn44 min
Feb 21, 10:56 AM ESTSevere Thunderstorm WarningJAXBrantley, Camden, Charlton49 min
Feb 21, 11:28 AM ESTSpecial Weather StatementJAXGlynn32 min
Feb 21, 11:47 AM ESTSpecial Weather StatementJAXGlynn28 min

Nearby

Severe Thunderstorm Warnings in Florida, 2014Every severe thunderstorm warning in 2014

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.