Alert archive / Florida / Special Weather Statements in 2009

Special Weather Statement, NWS Jacksonville, FL

July 29, 2009Alachua County, Florida

NWS Jacksonville, FL issued this special weather statement at Jul 29, 2009, 2:21 PM EDT for Alachua County, Florida. It was in force for 39 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
Jul 29, 2009, 2:21 PM EDT (18:21 UTC)
Expired
Jul 29, 2009, 3:00 PM EDT
In force
39 min
Issued by
NWS Jacksonville, FL

County Alachua County, FL

The radar

The Jacksonville radar (KJAX), 116 km from the middle of the area, began a volume at 18:24 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 6.4 hours before the alert went out and 203 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, Cape Canaveral, FL at 12:00Z on 2009-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 750 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, Cape Canaveral, FL at 12:00Z on 2009-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
750 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
955 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
9 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 Jul 29, 10:26 AM EDT, 3 hours 55 minutes earlier.

Area forecast discussion, Jul 29, 10:26 AM EDT, 3 hours 55 minutes before
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Hazardous weather outlook, Jul 29, 5:53 AM EDT, 8 hours 28 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
553 AM EDT WED JUL 29 2009

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-301000-
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-
553 AM EDT WED JUL 29 2009

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

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

...NUMEROUS THUNDERSTORMS EXPECTED DURING THE AFTERNOON AND EVENING...

AN UPPER LEVEL DISTURBANCE APPROACHING FROM THE WEST WILL ENHANCE
DEVELOPMENT OF NUMEROUS THUNDERSTORMS ACROSS THE AREA TODAY.
ISOLATED STRONG TO SEVERE STORMS WILL PRODUCE DAMAGING WIND GUSTS
AND HAIL. IN ADDITION THESE STORMS WILL BE CAPABLE OF PRODUCING
LOCALLY HEAVY RAINFALL AND CONTINUOUS CLOUD TO GROUND LIGHTNING.
LOCALIZED FLOODING IS POSSIBLE ESPECIALLY OVER NORTHEAST FLORIDA
WHERE THE STORM MOTIONS WILL BE SLOW.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

SCATTERED TO NUMEROUS THUNDERSTORMS ARE FORECAST EACH DAY WITH A
FEW STRONG THUNDERSTORMS POSSIBLE IN THE AFTERNOON AND EARLY
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, Jul 29, 1:18 PM EDT, 1 hour 3 minutes before
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Special weather statement, Jul 29, 2:01 PM EDT, 20 minutes before
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Special weather statement, Jul 29, 2:11 PM EDT, 10 minutes before
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Special weather statement, Jul 29, 2:21 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
221 PM EDT WED JUL 29 2009

FLZ036-040-291900-
ALACHUA-MARION-
221 PM EDT WED JUL 29 2009

...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR SOUTHEASTERN
ALACHUA AND NORTHERN MARION COUNTIES FOR STRONG WINDS AND EXCESSIVE
LIGHTNING VALID UNTIL 300 PM EDT...

AT 220 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 5 MILES NORTHWEST OF FLEMINGTON...OR 8
MILES NORTHEAST OF WILLISTON...MOVING EAST AT 20 MPH. ANOTHER STRONG
STORM WAS LOCATED OVER SOUTHEASTERN ALACHUA COUNTY. THESE STORMS
WILL ALSO AFFECT AREAS AROUND FLEMINGTON...MICANOPY...REDDICK...
MCINTOSH...ROCHELLE...CROSS CREEK...LOCHLOOSA...GROVE PARK AND CITRA
THROUGH 300 PM EDT. EXCESSIVE CLOUD-TO-GROUND LIGHTNING 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.

LAT...LON 2971 8206 2937 8205 2934 8240 2953 8241
TIME...MOT...LOC 1820Z 259DEG 16KT 2946 8234

WOLF

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 9:35 PM EDTSpecial Weather StatementJAXFlagler40 min
Jul 29, 1:18 PM EDTSpecial Weather StatementJAXAlachua42 min
Jul 29, 1:48 PM EDTSpecial Marine WarningJAX87 min
Jul 29, 2:01 PM EDTSpecial Weather StatementJAXBradford44 min
Jul 29, 2:11 PM EDTSpecial Weather StatementJAXClay49 min
Jul 29, 2:14 PM EDTSpecial Marine WarningJAX2 hr
Jul 29, 2:39 PM EDTSpecial Weather StatementJAXClay51 min
Jul 29, 2:41 PM EDTSpecial Weather StatementJAXDuval49 min
Jul 29, 3:16 PM EDTSpecial Marine WarningJAX59 min
Jul 29, 3:36 PM EDTSpecial Weather StatementJAXSaint Johns39 min
Jul 29, 4:13 PM EDTSpecial Marine WarningJAX62 min
Jul 29, 4:16 PM EDTSpecial Weather StatementJAXSaint Johns29 min
Jul 29, 4:23 PM EDTSpecial Weather StatementJAXMarion52 min
Jul 29, 4:45 PM EDTSpecial Weather StatementJAXSaint Johns45 min
Jul 29, 4:48 PM EDTSpecial Weather StatementJAXNassau42 min
Jul 29, 4:53 PM EDTSevere Thunderstorm WarningJAXBaker, Duval, Nassau31 min
Jul 29, 5:03 PM EDTSpecial Weather StatementJAXNassau42 min
Jul 29, 5:06 PM EDTSevere Thunderstorm WarningJAXFlagler, Saint Johns39 min
Jul 29, 5:09 PM EDTSpecial Weather StatementJAXMarion66 min
Jul 29, 5:33 PM EDTSpecial Marine WarningJAX117 min
Jul 29, 5:41 PM EDTSpecial Weather StatementJAXFlagler49 min
Jul 29, 6:00 PM EDTSevere Thunderstorm WarningJAXFlagler45 min
Jul 29, 6:06 PM EDTSpecial Weather StatementJAXBaker39 min
Jul 29, 6:12 PM EDTAreal Flood AdvisoryJAXFlagler2 hr
Jul 29, 6:46 PM EDTSpecial Weather StatementJAXFlagler44 min
Jul 29, 7:36 PM EDTSpecial Marine WarningJAX84 min
Jul 28, 8:21 PM EDTSpecial Weather StatementJAXWayne24 min
Jul 28, 8:44 PM EDTSpecial Weather StatementJAXWayne31 min
Jul 29, 4:49 PM EDTSpecial Weather StatementJAXClinch56 min
Jul 29, 4:58 PM EDTSpecial Weather StatementJAXPierce47 min
Jul 29, 5:02 PM EDTSpecial Weather StatementJAXEchols58 min
Jul 29, 5:39 PM EDTSpecial Weather StatementJAXCharlton, Ware66 min
Jul 29, 6:34 PM EDTSevere Thunderstorm WarningJAXCharlton31 min
Jul 29, 6:41 PM EDTSpecial Weather StatementJAXCamden64 min
Jul 29, 7:01 PM EDTSpecial Weather StatementJAXBrantley, Glynn44 min

Nearby

Special Weather Statements in Florida, 2009Every special weather statement 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.