Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS Fort Worth, TX

April 20, 2012Dallas County, Texas

NWS Fort Worth, TX issued this special weather statement at Apr 20, 2012, 5:32 AM CDT for Dallas County, Texas. It was in force for 28 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: Apr 20, 2012, 5:32 AM CDT (10:32 UTC)
Expired: Apr 20, 2012, 6:00 AM CDT
In force: 28 min
Issued by: NWS Fort Worth, TX

County Dallas County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 47 km from the middle of the area, began a volume at 10:33 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

Fort Worth, TX (KFWD), launched 00:00Z, 10.5 hours before the alert went out and 49 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: 5 J/kg
Mixed-layer CIN: -692 J/kg
Mixed-layer LCL: 2163 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 237 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 Fort Worth, TX wrote its last area forecast discussion before this special weather statement went out at Apr 20, 3:27 AM CDT, 2 hours 5 minutes earlier.

Area forecast discussion, Apr 20, 3:27 AM CDT, 2 hours 5 minutes before

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Hazardous weather outlook, Apr 20, 3:50 AM CDT, 1 hour 42 minutes before

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In the hours before

Special weather statement, Apr 20, 2:35 AM CDT, 2 hours 57 minutes before

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Special weather statement, Apr 20, 3:03 AM CDT, 2 hours 29 minutes before

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Local storm report, Apr 20, 3:32 AM CDT, 2 hours before

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Special weather statement, Apr 20, 4:16 AM CDT, 1 hour 16 minutes before

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Special weather statement, Apr 20, 4:46 AM CDT, 46 minutes before

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Special weather statement, Apr 20, 5:32 AM CDT, 0 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
Apr 19, 7:52 PM CDT	Severe Thunderstorm Warning	FWD	Young	53 min
Apr 19, 8:48 PM CDT	Special Weather Statement	FWD	Jack, Young	27 min
Apr 19, 9:02 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Palo Pinto, Stephens, Young	43 min
Apr 19, 11:45 PM CDT	Special Weather Statement	FWD	Eastland	30 min
Apr 19, 11:52 PM CDT	Special Weather Statement	FWD	Montague	23 min
Apr 20, 12:02 AM CDT	Severe Thunderstorm Warning	FWD	Montague	38 min
Apr 20, 2:03 AM CDT	Special Weather Statement	FWD	Grayson	27 min
Apr 20, 2:35 AM CDT	Special Weather Statement	FWD	Grayson	25 min
Apr 20, 3:03 AM CDT	Special Weather Statement	FWD	Fannin	27 min
Apr 20, 4:16 AM CDT	Special Weather Statement	FWD	Delta, Hopkins	29 min
Apr 20, 4:46 AM CDT	Special Weather Statement	FWD	Tarrant	29 min

Nearby

Special Weather Statements in Texas, 2012 Every special weather statement in 2012

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.