Alert archive / Texas / Red Flag Warnings in 2009

Red Flag Warning 16, NWS San Angelo, TX

April 1, 200915 counties in Texas

NWS San Angelo, TX issued this red flag warning at Apr 1, 2009, 3:46 AM CDT for 15 counties in Texas. It took effect at Apr 1, 2009, 10:00 AM CDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 1, 2009, 3:46 AM CDT (08:46 UTC)
In effect from: Apr 1, 2009, 10:00 AM CDT
Expired: Apr 1, 2009, 7:00 PM CDT
In force: 9 hr
Issued by: NWS San Angelo, TX

Counties Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Fisher County, TX, Haskell County, TX, Irion County, TX, Jones County, TX, Nolan County, TX, Runnels County, TX, Shackelford County, TX, Sterling County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX

The radar

The Dyess AFB radar (KDYX), 83 km from the middle of the area, began a volume at 08:52 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

Midland Regional, TX (KMAF), launched 00:00Z, 8.8 hours before the alert went out and 205 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: 5741 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 27 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 red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this red flag warning went out at Apr 1, 3:39 AM CDT, 7 minutes earlier.

Area forecast discussion, Apr 1, 3:39 AM CDT, 7 minutes before

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Hazardous weather outlook, Mar 31, 3:20 PM CDT, 12 hours 26 minutes before

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The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 1, 3:45 AM CDT	Lake Wind Advisory	SJT	Brown, Coke, Coleman, Concho, Haskell, Jones and 4 more	15 hr
Apr 1, 11:33 AM CDT	Wind Advisory	SJT	Callahan, Fisher, Haskell, Jones, Nolan, Shackelford and 2 more	6 hr
Apr 1, 2:46 PM CDT	Red Flag Warning	SJT	Brown, Callahan, Coke, Coleman, Concho, Crockett and 18 more	26 hr

Nearby

Red Flag Warnings in Texas, 2009 Every red flag warning in 2009

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.