Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 61, NWS Jacksonville, FL

March 7, 2008Alachua County, Marion County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Mar 7, 2008, 3:09 PM EST for Alachua County, Marion County, Florida. It was in force for 51 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: Mar 7, 2008, 3:09 PM EST (20:09 UTC)
Expired: Mar 7, 2008, 4:00 PM EST
In force: 51 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Alachua County, FL, Marion County, FL

The radar

The Jacksonville radar (KJAX), 126 km from the middle of the area, began a volume at 20:13 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
Mar 7, 11:59 AM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.2 hours before the alert went out and 127 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: 128 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 357 m²/s²
0-3 km storm-relative helicity: 436 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

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 Mar 7, 2:33 PM EST, 36 minutes earlier.

Area forecast discussion, Mar 7, 2:33 PM EST, 36 minutes before

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Hazardous weather outlook, Mar 7, 2:36 PM EST, 33 minutes before

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In the hours before

Special weather statement, Mar 7, 1:17 PM EST, 1 hour 52 minutes before

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Special weather statement, Mar 7, 1:37 PM EST, 1 hour 32 minutes before

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Special weather statement, Mar 7, 1:45 PM EST, 1 hour 24 minutes before

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Special weather statement, Mar 7, 2:30 PM EST, 39 minutes before

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Special weather statement, Mar 7, 2:52 PM EST, 17 minutes before

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Special weather statement, Mar 7, 3:02 PM EST, 7 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 7, 3:45 AM EST	Fire Weather Watch	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	34 hr
Mar 7, 3:45 AM EST	Red Flag Warning	JAX	Baker, Bradford, Flagler, Gilchrist, Nassau, Suwannee and 1 more	39 hr
Mar 7, 6:40 AM EST	Severe Thunderstorm Warning	JAX	Columbia, Suwannee	35 min
Mar 7, 8:14 AM EST	Severe Thunderstorm Warning	JAX	Hamilton, Suwannee	46 min
Mar 7, 8:48 AM EST	Severe Thunderstorm Warning	JAX	Baker, Columbia, Hamilton, Suwannee	42 min
Mar 7, 9:02 AM EST	Severe Thunderstorm Warning	JAX	Columbia, Hamilton, Suwannee	43 min
Mar 7, 9:13 AM EST	Tornado Warning	JAX	Suwannee	32 min
Mar 7, 9:25 AM EST	Tornado Warning	JAX	Columbia, Suwannee	50 min
Mar 7, 9:26 AM EST	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Columbia, Gilchrist, Union	49 min
Mar 7, 9:39 AM EST	Severe Thunderstorm Warning	JAX	Baker, Bradford, Columbia, Gilchrist, Hamilton, Suwannee and 1 more	51 min
Mar 7, 9:51 AM EST	Tornado Warning	JAX	Baker	39 min
Mar 7, 10:08 AM EST	Severe Thunderstorm Warning	JAX	Clay, Duval, Nassau	67 min
Mar 7, 10:18 AM EST	Tornado Warning	JAX	Baker, Duval, Nassau	13 min
Mar 7, 10:23 AM EST	Special Marine Warning	JAX		2 hr
Mar 7, 10:27 AM EST	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Gilchrist, Union	48 min
Mar 7, 10:40 AM EST	Tornado Warning	JAX	Alachua	41 min
Mar 7, 10:55 AM EST	Tornado Warning	JAX	Duval, Nassau	35 min
Mar 7, 10:56 AM EST	Severe Thunderstorm Warning	JAX	Marion	49 min
Mar 7, 11:15 AM EST	Tornado Warning	JAX	Bradford, Clay	25 min
Mar 7, 11:15 AM EST	Tornado Warning	JAX	Nassau	30 min
Mar 7, 11:25 AM EST	Severe Thunderstorm Warning	JAX	Clay, Marion, Putnam	50 min
Mar 7, 11:32 AM EST	Special Marine Warning	JAX		118 min
Mar 7, 11:43 AM EST	Severe Thunderstorm Warning	JAX	Clay, Saint Johns	47 min
Mar 7, 12:25 PM EST	Severe Thunderstorm Warning	JAX	Flagler, Saint Johns	50 min
Mar 7, 12:35 PM EST	Special Marine Warning	JAX		115 min
Mar 7, 1:25 PM EST	Severe Thunderstorm Warning	JAX	Alachua, Bradford, Clay, Marion, Putnam	65 min
Mar 7, 1:34 PM EST	Special Marine Warning	JAX		116 min
Mar 7, 1:49 PM EST	Severe Thunderstorm Warning	JAX	Marion	41 min
Mar 7, 2:00 PM EST	Severe Thunderstorm Warning	JAX	Flagler, Putnam, Saint Johns	60 min
Mar 7, 2:28 PM EST	Severe Thunderstorm Warning	JAX	Marion, Putnam	62 min
Mar 7, 2:41 PM EST	Freeze Watch	JAX	Baker, Bradford, Gilchrist, Nassau, Suwannee, Union	23 hr
Mar 7, 3:33 PM EST	Special Marine Warning	JAX		117 min
Mar 7, 4:18 PM EST	Special Marine Warning	JAX		117 min
Mar 7, 4:29 PM EST	Special Marine Warning	JAX		2 hr
Mar 7, 7:47 AM EST	Severe Thunderstorm Warning	JAX	Charlton, Clinch, Ware	43 min
Mar 7, 9:32 AM EST	Severe Thunderstorm Warning	JAX	Brantley, Camden, Charlton, Glynn, Pierce, Ware and 1 more	43 min
Mar 7, 9:48 AM EST	Tornado Warning	JAX	Brantley, Camden, Charlton, Ware	42 min
Mar 7, 10:14 AM EST	Tornado Warning	JAX	Brantley, Camden, Glynn, Wayne	46 min
Mar 7, 10:27 AM EST	Tornado Warning	JAX	Wayne	19 min
Mar 7, 10:39 AM EST	Severe Thunderstorm Warning	JAX	Brantley, Camden, Glynn, Wayne	51 min

Nearby

Severe Thunderstorm Warnings in Florida, 2008 Every severe thunderstorm warning in 2008

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.