Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 21, NWS Jacksonville, FL

March 1, 2003Alachua County, Bradford County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Mar 1, 2003, 8:26 AM EST for Alachua County, Bradford County, Florida. It was in force for 34 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: Mar 1, 2003, 8:26 AM EST (13:26 UTC)
Expired: Mar 1, 2003, 9:00 AM EST
In force: 34 min
Issued by: NWS Jacksonville, FL
Area: Counties, with a storm outline in the text

Counties Alachua County, FL, Bradford County, FL

The radar

The Jacksonville radar (KJAX), 86 km from the middle of the area, began a volume at 13:26 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, 1.4 hours before the alert went out and 88 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: 49 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 547 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

657 
WUUS52 KJAX 011326
SVRJAX
FLC001-007-011400-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
826 AM EST SAT MAR 1 2003

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ALACHUA COUNTY IN NORTHERN FLORIDA
  BRADFORD COUNTY IN NORTHERN FLORIDA

* UNTIL 900 AM EST

* AT 826 AM EST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL 4 MILES SOUTH OF LA CROSSE...OR
  ABOUT 9 MILES NORTHWEST OF GAINESVILLE...MOVING NORTHEAST AT 30
  MPH.

* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 900 AM EST...
  LA CROSSE...
  BROOKER...
  SAMPSON AND WALDO...
  HAMPTON...
  STARKE...
  LAWTEY...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR ROOM IN
THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS.

QUARTER SIZED HAIL HAS BEEN REPORTED WITH THIS STORM.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT...OR YOU CAN CALL THE NATIONAL
WEATHER SERVICE IN JACKSONVILLE DIRECTLY AT 904-741-4370 TO REPORT
SEVERE WEATHER.

LAT...LON 2973 8205 2972 8237 2986 8246 3013 8204
$$

SANDRIK

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 1, 5:04 AM EST	Severe Thunderstorm Warning	JAX	Alachua, Gilchrist	41 min
Mar 1, 6:49 AM EST	Severe Thunderstorm Warning	JAX	Alachua	41 min
Mar 1, 7:32 AM EST	Severe Thunderstorm Warning	JAX	Gilchrist	43 min
Mar 1, 7:51 AM EST	Severe Thunderstorm Warning	JAX	Alachua	39 min
Mar 1, 7:57 AM EST	Severe Thunderstorm Warning	JAX	Clay	48 min
Mar 1, 8:11 AM EST	Severe Thunderstorm Warning	JAX	Columbia, Suwannee	49 min
Mar 1, 8:29 AM EST	Severe Thunderstorm Warning	JAX	Duval, Saint Johns	46 min
Mar 1, 8:47 AM EST	Severe Thunderstorm Warning	JAX	Baker, Columbia	43 min
Mar 1, 8:53 AM EST	Severe Thunderstorm Warning	JAX	Clay	37 min
Mar 1, 8:58 AM EST	Special Marine Warning	JAX		62 min
Mar 1, 9:07 AM EST	Special Marine Warning	JAX		53 min
Mar 1, 9:29 AM EST	Severe Thunderstorm Warning	JAX	Clay	31 min
Mar 1, 9:37 AM EST	Severe Thunderstorm Warning	JAX	Saint Johns	53 min
Mar 1, 10:17 AM EST	Severe Thunderstorm Warning	JAX	Duval	43 min
Mar 1, 10:18 AM EST	Special Marine Warning	JAX		117 min
Mar 1, 11:58 AM EST	Special Marine Warning	JAX		2 hr
Mar 1, 12:41 PM EST	Severe Thunderstorm Warning	JAX	Hamilton	49 min
Mar 1, 3:38 PM EST	Severe Thunderstorm Warning	JAX	Baker, Columbia	52 min
Mar 1, 3:51 PM EST	Special Marine Warning	JAX		54 min
Mar 1, 6:53 PM EST	Special Marine Warning	JAX		97 min

Nearby

Severe Thunderstorm Warnings in Florida, 2003 Every severe thunderstorm warning in 2003

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.