Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 43, NWS Jacksonville, FL

May 11, 2014Clay County, Putnam County, Saint Johns County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at May 11, 2014, 5:34 PM EDT for Clay County, Putnam County, Saint Johns County, Florida. It was in force for 41 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 11, 2014, 5:34 PM EDT (21:34 UTC)
Expired
May 11, 2014, 6:15 PM EDT
In force
41 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Clay County, FL, Putnam County, FL, Saint Johns County, FL

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 9.6 hours before the alert went out and 74 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 2014-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 572 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 2014-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
572 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
992 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
35 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 11, 2:45 PM EDT, 2 hours 49 minutes earlier.

Area forecast discussion, May 11, 2:45 PM EDT, 2 hours 49 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
245 PM EDT SUN MAY 11 2014

.REST OF THE AFTERNOON...SCT TO OCNL NMRS SHOWERS AND STORMS WILL
CONTINUE TO DEVELOP OVER INLAND NE FL AND PORTIONS OF INLAND SE GA.
STORM MOTION IS SLOW TO THE N AND WILL FAVOR PULSE SHOWERS AND
STORMS WITH BRIEF PERIODS OF FREQUENT LIGHTNING AND LOCALLY HEAVY
RAINFALL. LOCALLY STRONG STORMS WILL PRODUCE GUSTY WINDS AND SMALL
HAIL.

.SHORT TERM...TONIGHT THROUGH WEDNESDAY...
TONIGHT...ISOLD TO SCT SHOWERS AND STORMS EXPECTED EARLY IN THE
EVENING WITH BEST CHANCES FCST TO BE FOCUSED BETWEEN GNV AND AYS
OVER TO STATENVILLE GA. THE MAINLY DIURNAL CONVECTION EXPECTED TO
WIND DOWN BY MIDNIGHT WITH RAIN CHANCES DROPPING OFF TO LESS THAN
15%. LIGHT WINDS COMBINED WITH RESIDUAL LOW LEVEL MOISTURE FROM RAIN
AND SOME THINNING OF MID AND HIGH LEVEL CLOUDS WILL ALLOW FOR PATCHY
FOG MAINLY W OF A LINE FROM LAKE CITY TO WAYCROSS. LOWS IN THE MID
60S TO THE LOWER 70S...WARMEST NEAR THE COAST DUE TO LIGHT S-SE
FLOW.

HIGH PRESSURE RIDGING AT THE SURFACE AND ALOFT ON MONDAY AND TUESDAY
IS EXPECTED TO KEEP THE ATMOSPHERE STABLE. WHILE A SHOWER CAN NOT BE
COMPLETELY RULED OUT...ESPECIALLY NORTHWEST CLOSER TO THE EDGE OF
THE UPPER TROUGH...CHANCES ARE TOO LOW FOR MENTION AT THIS TIME. THE
SURFACE AND UPPER RIDGE AXIS SLIDE EAST ON WEDNESDAY...AS A SHARP
UPPER TROUGH APPROACHES FROM THE THE WEST. THIS UPPER TROUGH COUPLED
WITH SEA BREEZE INTERACTIONS ARE EXPECTED TO PRODUCE ENOUGH
INSTABILITY WEDNESDAY AFTERNOON FOR CONVECTION TO DEVELOP.

TEMPERATURES ARE EXPECTED TO BE NEAR SEASONAL AVERAGES THIS PERIOD.

.LONG TERM.../WEDNESDAY NIGHT THROUGH SUNDAY/...

AS UPPER TROUGH DIPS INTO THE SOUTHEASTERN US THURSDAY...SURFACE LOW
PRESSURE IS EXPECTED TO DEVELOP OVER THE MID ATLANTIC REGION...WITH A
COLD FRONT MOVING ACROSS THE FORECAST AREA. GIVEN STRENGTH OF THIS UPPER
TROUGH...POTENTIAL FOR STRONG STORMS ON THURSDAY WILL CONTINUE TO BE
MONITORED. A SLIGHTLY COOLER AND DRIER AIRMASS WILL ADVECT IN FOLLOWING
THIS FRONT FOR THE WEEKEND.

TEMPERATURES ARE EXPECTED TO BE NEAR SEASONAL MID WEEK...THEN
TREND A LITTLE BELOW NORMAL INTO THE WEEKEND.

&&

.AVIATION...OCNL MVFR CIGS WITH HEALTHY CU FIELD AND CURRENT RADAR
SHOWS POPCORN TYPE CONVECTION LIFTING SLOWLY NWD. BEST CHANCES OF
CONVECTION AT TERMINALS WILL BE AROUND GNV...VQQ AND JAX. INCLUDED A
TEMPO GROUP FOR NOW AT VQQ WITH MVFR IN TSRA. STRONGEST STORM
ACTIVITY WILL BE GENERALLY W AND NW OF THE TERMINALS THROUGH THIS
EVENING AND WILL CONTAIN GUSTY WINDS AND LOW VSBY DOWN TO IFR.
VICINITY CONVECTION EXPECTED BY SUNSET AND THEN QUICKLY FADING
CONVECTION CHANCES REST OF THE NIGHT. CHANCE OF MVFR VSBY AT MORE
FOG PRONE VQQ BETWEEN 07Z-11Z.

&&

.MARINE...SFC HIGH PRESSURE WILL BE N OF THE AREA THROUGH EARLY IN
THE WEEK WITH SE TO E WINDS EXPECTED AT 10-15 KTS. SEAS WILL
BUILD TO 3-5 FT TUE THROUGH THURS AS A MORE ELY FLOW SENDS MORE
SEA/SWELL ENERGY INTO LOCAL WATERS. THERE IS POTENTIAL FOR SEAS TO
BE HIGHER BY MID WEEK POTENTIALLY REQUIRING A HEADLINE FOR SCEC FOR
HAZARDOUS SEAS.

RIP CURRENTS: LOW RISK WITH SURF AROUND 2 FT OR LESS. MORE SWELL
ENERGY MAY CREATE A FEW MORE RIPS OVER THE NEXT COUPLE DAYS.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  65  89  64  89 /  20  10  10  10
SSI  70  79  70  79 /  10  10  10  10
JAX  68  86  67  87 /  20  10  10   0
SGJ  71  80  70  81 /  10   0   0   0
GNV  67  87  66  89 /  30  10  10   0
OCF  68  88  67  90 /  20  10  10   0

&&

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

SHASHY/STRUBLE/WALKER
Hazardous weather outlook, May 11, 12:57 PM EDT, 4 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1257 PM EDT SUN MAY 11 2014

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-
GAZ132>136-149>154-162>166-121000-
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-
1257 PM EDT SUN MAY 11 2014

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

...ISOLATED STRONG STORMS POSSIBLE INLAND THIS AFTERNOON...

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SCATTERED THUNDERSTORMS ARE EXPECTED OVER INLAND AREAS TODAY WITH
MORE ISOLATED STORMS NEAR THE COAST. MOST OF THE STORMS WILL
DISSIPATE BY LATE THIS EVENING. STORM MOTION WILL GENERALLY BE NORTH
TO NORTHEAST AROUND 10 MPH. AN ISOLATED STRONG STORM IS POSSIBLE
WITH GUSTY WINDS...SMALL HAIL AND FREQUENT LIGHTNING.

RIVER FLOODING ON THE SANTA FE AND SUWANNEE RIVER BASINS WILL
CONTINUE TO SLOWLY SUBSIDE.

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

RIVER FLOODING WILL CONTINUE TO SUBSIDE ON THE SANTA FE AND
SUWANNEE RIVER BASINS.

ISOLATED THUNDERSTORMS ARE POSSIBLE WEDNESDAY THROUGH THURSDAY
NIGHT.

.SPOTTER INFORMATION STATEMENT...

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.

PLW/ARS

In the hours before

Local storm report, May 11, 5:04 PM EDT, 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
504 PM EDT SUN MAY 11 2014

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

0430 PM     HAIL             11 NNE MELROSE          29.85N 81.96W
05/11/2014  E0.75 INCH       CLAY               FL   PUBLIC

            PUBLIC REPORTED PENNY-SIZE HAIL.

&&

KGUILLET
Special weather statement, May 11, 5:06 PM EDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
506 PM EDT SUN MAY 11 2014

FLZ025-032-033-112145-
CLAY-DUVAL-ST. JOHNS-
506 PM EDT SUN MAY 11 2014

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR CLAY...ST.
JOHNS AND DUVAL COUNTIES FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE
LIGHTNING VALID UNTIL 545 PM EDT...

AT 507 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS CENTERED 3 MILES NORTH OF PICOLATA...STATIONARY. THESE
STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND PICOLATA...
BAKERSVILLE...FLEMING ISLAND...SWITZERLAND...FRUIT COVE AND GREEN
COVE SPRINGS THROUGH 545 PM EDT. HAIL UP TO THREE QUARTER 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.

LAT...LON 3009 8180 3018 8156 2986 8145 2985 8165
TIME...MOT...LOC 2107Z 164DEG 1KT 2996 8160

STRUBLE
Special weather statement, May 11, 5:19 PM EDT, 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
519 PM EDT SUN MAY 11 2014

FLZ024-025-112200-
DUVAL-NASSAU-
519 PM EDT SUN MAY 11 2014

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR DUVAL AND
NASSAU COUNTIES FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING
VALID UNTIL 600 PM EDT...

AT 519 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS CENTERED OVER RIVERSIDE...MOVING NORTH AT 5 MPH. THESE
STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND NAS JAX...
BAYMEADOWS...SAN MARCO...RIVERSIDE...ORTEGA...NORMANDY...JACKSONVILLE
HEIGHTS...CISCO GARDENS...JACKSONVILLE AND ARLINGTON THROUGH 600 PM
EDT. HAIL UP TO THREE QUARTER 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.

LAT...LON 3016 8169 3017 8169 3019 8168 3019 8169
      3019 8171 3019 8179 3060 8192 3069 8161
      3020 8153
TIME...MOT...LOC 2119Z 200DEG 5KT 3033 8168

STRUBLE
Local storm report, May 11, 5:23 PM EDT, 11 minutes before
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Special weather statement, May 11, 5:28 PM EDT, 6 minutes before
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Local storm report, May 11, 5:33 PM EDT, 1 minute before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 1:52 PM EDTSpecial Weather StatementJAXBaker, Union38 min
May 11, 2:21 PM EDTSpecial Weather StatementJAXAlachua39 min
May 11, 2:24 PM EDTSpecial Weather StatementJAXColumbia51 min
May 11, 2:51 PM EDTSevere Thunderstorm WarningJAXBaker, Columbia, Union39 min
May 11, 3:22 PM EDTSpecial Weather StatementJAXBradford, Clay38 min
May 11, 3:33 PM EDTSpecial Weather StatementJAXAlachua42 min
May 11, 3:42 PM EDTSevere Thunderstorm WarningJAXNassau48 min
May 11, 3:49 PM EDTAreal Flood AdvisoryJAXAlachua116 min
May 11, 3:56 PM EDTSpecial Weather StatementJAXSuwannee49 min
May 11, 4:00 PM EDTAreal Flood AdvisoryJAXClay90 min
May 11, 4:16 PM EDTSpecial Weather StatementJAXNassau44 min
May 11, 4:18 PM EDTSpecial Weather StatementJAXDuval42 min
May 11, 4:21 PM EDTSevere Thunderstorm WarningJAXDuval, Nassau39 min
May 11, 4:23 PM EDTSevere Thunderstorm WarningJAXClay, Duval, Saint Johns52 min
May 11, 4:33 PM EDTSpecial Weather StatementJAXGilchrist42 min
May 11, 4:41 PM EDTSpecial Weather StatementJAXPutnam49 min
May 11, 4:45 PM EDTSevere Thunderstorm WarningJAXNassau45 min
May 11, 4:47 PM EDTAreal Flood AdvisoryJAXClay, Duval, Saint Johns88 min
May 11, 4:54 PM EDTAreal Flood AdvisoryJAXClay2 hr
May 11, 4:55 PM EDTSevere Thunderstorm WarningJAXAlachua, Bradford, Clay, Putnam50 min
May 11, 5:06 PM EDTSpecial Weather StatementJAXClay39 min
May 11, 5:09 PM EDTSevere Thunderstorm WarningJAXClay, Duval, Saint Johns51 min
May 11, 5:13 PM EDTAreal Flood AdvisoryJAXColumbia, Union92 min
May 11, 5:19 PM EDTSpecial Weather StatementJAXDuval, Nassau41 min
May 11, 5:28 PM EDTSpecial Weather StatementJAXMarion47 min
May 11, 5:37 PM EDTAreal Flood AdvisoryJAXClay83 min
May 11, 5:45 PM EDTAreal Flood AdvisoryJAXDuval2 hr
May 11, 5:45 PM EDTSevere Thunderstorm WarningJAXMarion45 min
May 11, 6:14 PM EDTSpecial Weather StatementJAXFlagler46 min
May 11, 6:23 PM EDTSpecial Weather StatementJAXMarion52 min
May 11, 7:04 PM EDTSpecial Weather StatementJAXMarion41 min
May 11, 3:31 PM EDTSpecial Weather StatementJAXCharlton44 min
May 11, 4:31 PM EDTSpecial Weather StatementJAXCharlton44 min
May 11, 5:23 PM EDTSevere Thunderstorm WarningJAXCamden52 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.