Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 409, NWS Fort Worth, TX

December 9, 2008Anderson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Dec 9, 2008, 6:29 AM CST for Anderson County, Texas. It was in force for 49 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 9, 2008, 6:29 AM CST (12:29 UTC)
Expired: Dec 9, 2008, 7:18 AM CST
In force: 49 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Anderson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 177 km from the middle of the area, began a volume at 12:30 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
Dec 8, 11:31 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 0.5 hours before the alert went out and 194 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: 1607 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 295 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 13.2

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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 9, 5:22 AM CST, 1 hour 7 minutes earlier.

Area forecast discussion, Dec 9, 5:22 AM CST, 1 hour 7 minutes before

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Hazardous weather outlook, Dec 9, 5:55 AM CST, 34 minutes before

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In the hours before

Special weather statement, Dec 9, 3:34 AM CST, 2 hours 55 minutes before

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Special weather statement, Dec 9, 4:04 AM CST, 2 hours 25 minutes before

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Special weather statement, Dec 9, 4:39 AM CST, 1 hour 50 minutes before

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Special weather statement, Dec 9, 4:41 AM CST, 1 hour 48 minutes before

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Special weather statement, Dec 9, 5:08 AM CST, 1 hour 21 minutes before

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Special weather statement, Dec 9, 6:00 AM CST, 29 minutes before

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The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 8, 9:07 PM CST	Special Weather Statement	FWD	Cooke, Denton	23 min
Dec 8, 9:11 PM CST	Special Weather Statement	FWD	Hood, Somervell, Tarrant	34 min
Dec 8, 9:43 PM CST	Special Weather Statement	FWD	Tarrant	32 min
Dec 8, 9:47 PM CST	Special Weather Statement	FWD	Denton, Grayson	28 min
Dec 8, 10:13 PM CST	Severe Thunderstorm Warning	FWD	Grayson	47 min
Dec 8, 10:24 PM CST	Tornado Warning	FWD	Grayson	36 min
Dec 8, 10:45 PM CST	Special Weather Statement	FWD	Collin	30 min
Dec 8, 11:09 PM CST	Tornado Warning	FWD	Collin	36 min
Dec 8, 11:34 PM CST	Special Weather Statement	FWD	Hill	26 min
Dec 8, 11:40 PM CST	Special Weather Statement	FWD	Fannin	35 min
Dec 8, 11:51 PM CST	Severe Thunderstorm Warning	FWD	Ellis, Hill, Navarro	39 min
Dec 9, 12:29 AM CST	Severe Thunderstorm Warning	FWD	Ellis, Navarro	31 min
Dec 9, 12:53 AM CST	Severe Thunderstorm Warning	FWD	Ellis, Henderson, Kaufman, Navarro	40 min
Dec 9, 3:34 AM CST	Special Weather Statement	FWD	Kaufman	26 min
Dec 9, 3:37 AM CST	Wind Advisory	FWD	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 40 more	20 hr
Dec 9, 4:04 AM CST	Special Weather Statement	FWD	Van Zandt	26 min
Dec 9, 4:39 AM CST	Special Weather Statement	FWD	McLennan	36 min
Dec 9, 4:41 AM CST	Special Weather Statement	FWD	Van Zandt	34 min
Dec 9, 5:08 AM CST	Special Weather Statement	FWD	Limestone	37 min
Dec 9, 5:22 AM CST	Severe Thunderstorm Warning	FWD	Freestone, Limestone, Navarro	53 min
Dec 9, 6:00 AM CST	Special Weather Statement	FWD	Henderson	30 min
Dec 9, 7:47 AM CST	Special Weather Statement	FWD	McLennan	28 min
Dec 9, 7:50 AM CST	Severe Thunderstorm Warning	FWD	McLennan	39 min
Dec 9, 9:10 AM CST	Special Weather Statement	FWD	Freestone	35 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.