Alert archive / Florida / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 103, NWS Tallahassee, FL

December 12, 2010Holmes County, Walton County, Washington County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Dec 12, 2010, 1:19 AM CST for Holmes County, Walton County, Washington County, Florida. It was in force for 41 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: Dec 12, 2010, 1:19 AM CST (07:19 UTC)
Expired: Dec 12, 2010, 2:00 AM CST
In force: 41 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

Counties Holmes County, FL, Walton County, FL, Washington County, FL

The radar

The Eglin Afb radar (KEVX), 15 km from the middle of the area, began a volume at 07:22 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 7.3 hours before the alert went out and 155 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 72 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 Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 11, 8:07 PM CST, 5 hours 12 minutes earlier.

Area forecast discussion, Dec 11, 8:07 PM CST, 5 hours 12 minutes before

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Hazardous weather outlook, Dec 11, 8:59 PM CST, 4 hours 20 minutes before

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In the hours before

Special weather statement, Dec 12, 1:06 AM CST, 13 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 11, 7:51 PM CST	Gale Warning	TAE		39 hr
Dec 11, 8:00 PM CST	Hard Freeze Watch	TAE	Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 7 more	8 hr
Dec 12, 1:25 AM CST	Severe Thunderstorm Warning	TAE	Walton	35 min
Dec 12, 1:37 AM CST	Special Marine Warning	TAE		68 min
Dec 12, 2:01 AM CST	Severe Thunderstorm Warning	TAE	Bay, Walton, Washington	44 min
Dec 12, 2:35 AM CST	Special Marine Warning	TAE		85 min
Dec 12, 2:45 AM CST	Severe Thunderstorm Warning	TAE	Bay, Calhoun, Gulf	45 min
Dec 12, 2:47 AM CST	Rip Current Statement	TAE	Bay, Gulf, Walton	30 hr
Dec 12, 3:54 AM CST	Special Marine Warning	TAE		96 min
Dec 12, 4:02 AM CST	Small Craft Advisory	TAE		54 hr
Dec 12, 4:14 AM CST	Hard Freeze Warning	TAE	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more	27 hr
Dec 12, 4:35 AM CST	Wind Chill Advisory	TAE	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more	30 hr
Dec 12, 5:01 AM CST	Special Marine Warning	TAE		74 min
Dec 12, 1:18 PM CST	Red Flag Warning	TAE	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more	29 hr
Dec 12, 4:13 PM CST	Hard Freeze Watch	TAE	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more	22 hr
Dec 12, 4:24 PM CST	High Surf Advisory	TAE	Bay, Gulf, Walton	17 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2010 Every severe thunderstorm warning in 2010

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.