Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 134, NWS Jacksonville, FL

June 12, 2011Bradford County, Clay County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 12, 2011, 6:25 PM EDT for Bradford County, Clay County, Florida. It was in force for 50 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
Jun 12, 2011, 6:25 PM EDT (22:25 UTC)
Expired
Jun 12, 2011, 7:15 PM EDT
In force
50 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Bradford County, FL, Clay County, FL

The radar

The Jacksonville radar (KJAX), 65 km from the middle of the area, began a volume at 22:28 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, 10.4 hours before the alert went out and 67 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 2011-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1356 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 2011-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
1356 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
826 m above ground
0-6 km bulk shear
2 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
87 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 Jun 12, 2:52 PM EDT, 3 hours 33 minutes earlier.

Area forecast discussion, Jun 12, 2:52 PM EDT, 3 hours 33 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSONVILLE FL
252 PM EDT SUN JUN 12 2011

...ABOVE NORMAL TEMPERATURES THOUGH THE WEEK...

.SHORT TERM...TNGT THRU TUE NGT...SEA BREEZE INTERSECTION ALONG
US-301 CORRIDOR LATE TODAY SHOULD SPARK SCATTERED T-STORMS WHICH
SHOULD FIZZLE AFTER DARK. FOR MON...WEAK SHORTWAVE ON NWRLY FLOW
WILL HELP PUSH WEAK SFC FRONT SWD ACRS SRN GA AND PRODUCE SCATTERED
SHRA/TSRA. FRONT STALLS AND WEAKENS OVER SRN GA TUE AS SHORTWAVE
EXITS THE AREA LEADING TO LESSER COVERAGE OF TSRA. EAST COAST SEA
BREEZE LIKELY TO BE PINNED CLOSE TO COASTLINE MON AND TUE AFTNS
GIVEN MORE LLVL WRLY FLOW.

MOS GUID HAS CONTINUED TO SHOW A COOL BIAS OF 3-5 DEGREES. MODEL LLVL
THICKNESS/TEMP FIELDS HAVE THE SAME VALUES OVER SW GA YDAY...WHERE
TEMPS NEARED 100 DEG...ACROSS MUCH OF SRN GA TMRW AFTN AND TUE
AFTN. RECORD TEMPS ARE AROUND 100 DEG...SO COULD TIE IN SOME AREAS
ESP INTERIOR. EXPECT DWPTS IN LOW/MID 70S IN MORNING...MIXING OUT TO
MID/UPR 60S IN AFTN WHICH SHOULD KEEP HEAT INDEX VALUES BELOW
HEAT ADVISORY CRITERIA...BUT STILL LIKELY STAYING IN 100-105
RANGE THROUGH AFTN MON AND TUE.

.LONG TERM...WED THRU SUN...CONTINUED HOT AND HUMID. ABOVE NORMAL
TEMPS WITH AFTN HEAT INDEX VALUES IN 100-105 RANGE EXPECTED
THROUGH THE WORKWEEK. ONLY LOW CHANCES OF RAIN EACH AFTN ALONG SEA
BREEZE BDRYS. GENERALLY WNW FLOW ALOFT WITH WEAK DISTURBANCES
THU/FRI WHICH COULD ENHANCE RAIN CHANCES...FOR NOW KEEPING POPS
20-30 UNTIL I SEE A CLEARER FOCUS FOR GREATER PCPN COVERAGE.

&&

.AVIATION...AREAS OF SMOKE ALONG THE COAST WILL KEEP MVFR VSBY AT
SSI AND CRG TIL AROUND 00Z. SCATTERED STORMS WILL CONTINUE TO
DEVELOP THIS AFTERNOON AS SEA BREEZES CONVERGE INLAND. HAVE
HAVE VCTS AT VQQ AND GNV TIL 01Z. HAVE CB AT REST OF TERMINALS.
PATCHY FOG POSSIBLE LATER TONIGHT ACROSS THE INLAND AREAS.

&&

.MARINE...NO HEADLINES. SOUTHEAST WINDS WILL VEER TO THE WEST
TONIGHT AND MONDAY AS A COLD FRONT MOVES TOWARDS THE WATERS.
AREAS OF SMOKE ACROSS THE NEAR SHORE WATERS.

&&

.FIRE WEATHER...FIRE DANGER STATEMENT IN EFFECT THIS AFTERNOON FOR
MUCH OF INLAND NORTHEAST FLORIDA FOR MARGINALLY LOW RH AND HIGH ERC.
RH VALUES WILL BRIEFLY DROP BELOW 35 PERCENT. SIMILAR CONDITIONS ARE
POSSIBLE MONDAY DUE TO THE HOT AFTERNOON TEMPS.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  70 100  70 100 /  20  30  20  20
SSI  74  93  74  94 /  10  30  20  20
JAX  71  98  73  99 /  10  30  20  20
SGJ  72  93  75  93 /  10  30  20  20
GNV  70  97  71  98 /  20  30  20  30
OCF  70  95  71  96 /  10  20  10  30

&&

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

&&

WOLF/PETERSON
Hazardous weather outlook, Jun 12, 5:05 AM EDT, 13 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
505 AM EDT SUN JUN 12 2011

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-130915-
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-
505 AM EDT SUN JUN 12 2011

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

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

SMOKE FROM AREA WILDFIRES WILL CONTINUE TO CAUSE PERIODIC
VISIBILITY RESTRICTIONS NEAR THE FIRES.

THERE IS A CHANCE FOR ISOLATED TO SCATTERED THUNDERSTORMS ACROSS
THE REGION THIS AFTERNOON AND EVENING.

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

THERE IS A CHANCE FOR PRIMARILY AFTERNOON AND EVENING ISOLATED TO
SCATTERED THUNDERSTORMS EACH DAY THIS WEEK. A PASSING SURFACE
TROUGH COULD TRIGGER A FEW STRONGER STORMS MONDAY AFTERNOON AND EVENING.

.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.

In the hours before

Special weather statement, Jun 12, 5:15 PM EDT, 1 hour 10 minutes before
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Special weather statement, Jun 12, 5:17 PM EDT, 1 hour 8 minutes before
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Special weather statement, Jun 12, 5:29 PM EDT, 56 minutes before
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Local storm report, Jun 12, 5:57 PM EDT, 28 minutes before
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Local storm report, Jun 12, 6:11 PM EDT, 14 minutes before
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Special weather statement, Jun 12, 6:25 PM EDT, 0 minutes before
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      <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 8:32 PM EDTSpecial Weather StatementJAXAlachua43 min
Jun 11, 8:39 PM EDTSpecial Weather StatementJAXMarion36 min
Jun 11, 8:43 PM EDTSevere Thunderstorm WarningJAXAlachua32 min
Jun 12, 3:20 PM EDTSpecial Weather StatementJAXPutnam40 min
Jun 12, 3:28 PM EDTSpecial Weather StatementJAXFlagler47 min
Jun 12, 3:49 PM EDTSpecial Weather StatementJAXPutnam41 min
Jun 12, 3:53 PM EDTSpecial Weather StatementJAXGilchrist37 min
Jun 12, 4:03 PM EDTSpecial Weather StatementJAXHamilton27 min
Jun 12, 4:37 PM EDTSpecial Weather StatementJAXSuwannee38 min
Jun 12, 4:45 PM EDTSpecial Weather StatementJAXColumbia45 min
Jun 12, 4:55 PM EDTSevere Thunderstorm WarningJAXHamilton, Suwannee17 min
Jun 12, 5:17 PM EDTSpecial Weather StatementJAXSuwannee43 min
Jun 12, 5:29 PM EDTSpecial Weather StatementJAXUnion46 min
Jun 12, 6:25 PM EDTSpecial Weather StatementJAXBaker35 min
Jun 12, 6:40 PM EDTSpecial Weather StatementJAXPutnam35 min
Jun 12, 7:14 PM EDTSpecial Weather StatementJAXClay31 min
Jun 12, 7:36 PM EDTSpecial Weather StatementJAXClay39 min
Jun 12, 4:19 PM EDTSpecial Weather StatementJAXWayne41 min
Jun 12, 5:15 PM EDTSpecial Weather StatementJAXJeff Davis30 min
Jun 12, 6:39 PM EDTSpecial Weather StatementJAXAppling51 min
Jun 12, 7:09 PM EDTSpecial Weather StatementJAXWayne36 min
Jun 12, 7:41 PM EDTSpecial Weather StatementJAXWayne49 min
Jun 12, 7:50 PM EDTSpecial Weather StatementJAXCoffee40 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011Every severe thunderstorm warning in 2011

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.