Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 59, NWS Jacksonville, FL

April 14, 2009Marion County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 14, 2009, 8:25 AM EDT for Marion 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: Apr 14, 2009, 8:25 AM EDT (12:25 UTC)
Expired: Apr 14, 2009, 9:15 AM EDT
In force: 50 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

County Marion County, FL

The radar

The Jacksonville radar (KJAX), 146 km from the middle of the area, began a volume at 12:25 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 14, 6:15 AM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 0.4 hours before the alert went out and 148 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: 445 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 464 m²/s²
0-3 km storm-relative helicity: 680 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

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 14, 4:15 AM EDT, 4 hours 10 minutes earlier.

Area forecast discussion, Apr 14, 4:15 AM EDT, 4 hours 10 minutes before

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Hazardous weather outlook, Apr 14, 6:33 AM EDT, 1 hour 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
633 AM EDT TUE APR 14 2009

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-151045-
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-
633 AM EDT TUE APR 14 2009

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

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

...TORNADO WATCH IN EFFECT FOR MARION...PUTNAM...AND FLAGLER
COUNTIES UNTIL 2 PM EDT...

...FLOOD WARNINGS REMAIN IN EFFECT FOR VARIOUS RIVERS ACROSS
SOUTHEAST GEORGIA AND NORTHEAST FLORIDA...

A COMPLEX OF SHOWERS AND THUNDERSTORMS...OUT AHEAD OF AN APPROACHING
COLD FRONT...WILL BE MOVING ACROSS NORTHEAST AND NORTH CENTRAL
FLORIDA TODAY. MOST OF THE STORMS WILL BE MAINLY SOUTH OF INTERSTATE
10 WITH THE STRONGEST STORMS MAINLY SOUTH OF GAINESVILLE AND ST
AUGUSTINE. THE STRONGER STORMS WILL BE CAPABLE OF LARGE HAIL AND
ISOLATED TORNADOES. AN ADDITIONAL 2 INCHES OF RAIN IS ALSO POSSIBLE
ACROSS THIS AREA WHICH MAY CAUSE LOCALIZED FLOODING. A COLD FRONT
WILL MOVE THROUGH THIS AFTERNOON WHICH WILL BRING IN DRIER AIR AND
CLEARING SKIES TO ALL AREAS BY LATE AFTERNOON.

THE RECENT HEAVY RAINFALL MAY AGGRAVATE THE FLOODING SITUATION
ACROSS SOUTHEAST GEORGIA AND THE SUWANNEE RIVER VALLEY OF NORTH
FLORIDA. RESIDENTS ACROSS THE AREA ARE URGED TO MONITOR THE LATEST
FORECASTS AND RIVER FLOOD PRODUCTS.

SIGNIFICANT RISES WILL CONTINUE ON THE SANTA FE RIVER AT BOTH THREE
RIVERS ESTATES AND HILDRETH. PLEASE REFER TO THE LATEST RIVER FLOOD
PRODUCTS FOR COMPLETE DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

AN INCREASING ONSHORE FLOW AND NORTHEAST SWELLS WILL LIKELY
ELEVATE THE RISK OF RIP CURRENTS FROM THURSDAY INTO THE WEEKEND.
THE NEXT COLD FRONT WILL BRING A CHANCE OF THUNDERSTORMS TO
THE AREA ON MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE REQUESTED TO ACTIVATE IN THE WATCH AREA.

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

PP

In the hours before

Special weather statement, Apr 14, 5:23 AM EDT, 3 hours 2 minutes before

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Special weather statement, Apr 14, 5:35 AM EDT, 2 hours 50 minutes before

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Local storm report, Apr 14, 7:42 AM EDT, 43 minutes before

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Local storm report, Apr 14, 7:48 AM EDT, 37 minutes before

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Special weather statement, Apr 14, 7:56 AM EDT, 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
756 AM EDT TUE APR 14 2009

FLZ036-040-141245-
ALACHUA-MARION-
756 AM EDT TUE APR 14 2009

...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR SOUTHEASTERN
ALACHUA AND NORTHWESTERN MARION COUNTIES FOR STRONG WINDS AND SMALL
HAIL VALID UNTIL 845 AM EDT...

AT 756 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 7 MILES NORTHWEST OF ROMEO...OR 7 MILES
SOUTHWEST OF WILLISTON...MOVING NORTHEAST AT 25 MPH. THIS STRONG
THUNDERSTORM WILL ALSO AFFECT AREAS AROUND ROMEO...RAINBOW LAKES
ESTATES...FLEMINGTON...LOWELL...REDDICK...MICANOPY...MCINTOSH...CROSS
CREEK AND CITRA THROUGH 845 AM EDT. HAIL UP TO ONE HALF INCH IN
DIAMETER AND GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED ALONG WITH
POSSIBLE MINOR DAMAGE.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 PM EDT TUESDAY AFTERNOON
FOR NORTHEASTERN FLORIDA.

LAT...LON 2915 8254 2922 8254 2922 8253 2923 8240
      2948 8241 2947 8252 2948 8253 2962 8226
      2941 8201 2909 8250
TIME...MOT...LOC 1156Z 237DEG 22KT 2929 8251

PETERSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 8:00 PM EDT	Special Marine Warning	JAX		2 hr
Apr 13, 8:05 PM EDT	Special Weather Statement	JAX	Hamilton, Suwannee	55 min
Apr 13, 8:15 PM EDT	Special Weather Statement	JAX	Putnam	30 min
Apr 13, 8:17 PM EDT	Special Weather Statement	JAX	Clay, Saint Johns	43 min
Apr 13, 8:24 PM EDT	Severe Thunderstorm Warning	JAX	Gilchrist, Suwannee	47 min
Apr 13, 8:42 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Clay, Putnam	33 min
Apr 13, 8:48 PM EDT	Special Marine Warning	JAX		57 min
Apr 13, 8:50 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Columbia, Gilchrist, Hamilton	40 min
Apr 13, 8:53 PM EDT	Special Weather Statement	JAX	Gilchrist	52 min
Apr 13, 8:55 PM EDT	Special Weather Statement	JAX	Putnam	50 min
Apr 13, 9:06 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Columbia, Gilchrist, Marion, Union	26 min
Apr 13, 9:15 PM EDT	Special Weather Statement	JAX	Clay	45 min
Apr 13, 9:24 PM EDT	Areal Flood Advisory	JAX	Clay, Putnam	111 min
Apr 13, 9:29 PM EDT	Special Weather Statement	JAX	Baker	46 min
Apr 13, 9:33 PM EDT	Special Weather Statement	JAX	Alachua, Bradford, Union	42 min
Apr 13, 9:47 PM EDT	Special Weather Statement	JAX	Putnam	43 min
Apr 13, 9:53 PM EDT	Special Marine Warning	JAX		67 min
Apr 13, 9:53 PM EDT	Special Weather Statement	JAX	Clay	52 min
Apr 13, 9:57 PM EDT	Special Marine Warning	JAX		93 min
Apr 13, 10:00 PM EDT	Tornado Warning	JAX	Saint Johns	30 min
Apr 13, 10:08 PM EDT	River Flood Warning	JAX	Baker, Nassau	14 hr
Apr 13, 10:10 PM EDT	Special Marine Warning	JAX		65 min
Apr 13, 10:13 PM EDT	Special Weather Statement	JAX	Marion	47 min
Apr 13, 10:15 PM EDT	Special Weather Statement	JAX	Clay, Duval	45 min
Apr 13, 10:22 PM EDT	Areal Flood Warning	JAX	Putnam	93 min
Apr 13, 10:34 PM EDT	Special Weather Statement	JAX	Flagler	41 min
Apr 13, 10:37 PM EDT	Areal Flood Warning	JAX	Saint Johns	84 min
Apr 13, 10:54 PM EDT	Special Marine Warning	JAX		55 min
Apr 13, 11:29 PM EDT	Special Marine Warning	JAX		2 hr
Apr 14, 3:31 AM EDT	Lake Wind Advisory	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	15 hr
Apr 14, 4:52 AM EDT	Fire Weather Watch	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	24 hr
Apr 14, 5:23 AM EDT	Special Weather Statement	JAX	Marion	37 min
Apr 14, 5:35 AM EDT	Special Weather Statement	JAX	Marion	25 min
Apr 14, 7:56 AM EDT	Special Weather Statement	JAX	Marion	49 min
Apr 14, 8:38 AM EDT	Special Weather Statement	JAX	Putnam	52 min
Apr 14, 8:57 AM EDT	Special Weather Statement	JAX	Marion	48 min
Apr 14, 9:10 AM EDT	Special Weather Statement	JAX	Flagler, Putnam, Saint Johns	50 min
Apr 14, 9:26 AM EDT	Severe Thunderstorm Warning	JAX	Alachua, Marion	23 min
Apr 14, 9:32 AM EDT	Special Weather Statement	JAX	Alachua, Bradford, Clay, Duval, Putnam, Saint Johns and 1 more	88 min
Apr 14, 9:37 AM EDT	Special Marine Warning	JAX		113 min
Apr 14, 9:56 AM EDT	Wind Advisory	JAX	Bradford, Flagler, Gilchrist, Union	113 min
Apr 14, 10:17 AM EDT	Special Marine Warning	JAX		118 min
Apr 14, 11:29 AM EDT	Special Marine Warning	JAX		61 min

Nearby

Severe Thunderstorm Warnings in Florida, 2009 Every severe thunderstorm warning in 2009

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.