Alert archive / Texas / Flash Flood Watches in 2012

Flash Flood Watch 1, NWS San Angelo, TX

May 10, 201219 counties in Texas

NWS San Angelo, TX issued this flash flood watch at May 10, 2012, 3:52 AM CDT for 19 counties in Texas. It took effect at May 10, 2012, 7:00 AM CDT. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: May 10, 2012, 3:52 AM CDT (08:52 UTC)
In effect from: May 10, 2012, 7:00 AM CDT
Expired: May 11, 2012, 2:49 AM CDT
In force: 20 hr
Issued by: NWS San Angelo, TX
Flood severity: None

Counties Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Irion County, TX, Kimble County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Nolan County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 45 km from the middle of the area, began a volume at 08:54 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, 8.9 hours before the alert went out and 215 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: 2623 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 35 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 flash flood watch 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 flash flood watch went out at May 9, 11:50 PM CDT, 4 hours 2 minutes earlier.

Area forecast discussion, May 9, 11:50 PM CDT, 4 hours 2 minutes before

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Hazardous weather outlook, May 10, 3:14 AM CDT, 38 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
May 9, 7:30 PM CDT	Special Weather Statement	SJT	Upton	60 min
May 10, 6:35 AM CDT	Areal Flood Advisory	SJT	Crockett	115 min
May 10, 6:54 AM CDT	Special Weather Statement	SJT	Crockett	51 min
May 10, 7:31 AM CDT	Special Weather Statement	SJT	Sutton	44 min
May 10, 9:01 AM CDT	Special Weather Statement	SJT	Menard	59 min
May 10, 9:36 AM CDT	Special Weather Statement	SJT	Menard	24 min
May 10, 9:47 AM CDT	Flash Flood Warning	SJT	Crockett	3 hr
May 10, 10:24 AM CDT	Flash Flood Warning	SJT	Irion	3 hr
May 10, 10:41 AM CDT	Special Weather Statement	SJT	Irion	34 min
May 10, 10:45 AM CDT	Severe Thunderstorm Warning	SJT	Irion	30 min
May 10, 11:12 AM CDT	Special Weather Statement	SJT	Kimble	33 min
May 10, 11:15 AM CDT	Special Weather Statement	SJT	Tom Green	30 min
May 10, 11:24 AM CDT	Areal Flood Advisory	SJT	Schleicher, Sutton	3 hr
May 10, 11:58 AM CDT	Flash Flood Warning	SJT	Tom Green	3 hr
May 10, 12:30 PM CDT	Special Weather Statement	SJT	Tom Green	30 min
May 10, 12:34 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	26 min
May 10, 12:58 PM CDT	Severe Thunderstorm Warning	SJT	Tom Green	32 min
May 10, 1:10 PM CDT	Special Weather Statement	SJT	Menard	50 min
May 10, 1:47 PM CDT	Areal Flood Advisory	SJT	Concho, Menard	118 min
May 10, 2:00 PM CDT	Special Weather Statement	SJT	Runnels	60 min
May 10, 2:16 PM CDT	Areal Flood Advisory	SJT	Coke, Runnels	119 min
May 10, 2:19 PM CDT	Special Weather Statement	SJT	McCulloch	56 min
May 10, 2:55 PM CDT	Areal Flood Advisory	SJT	Tom Green	3 hr
May 10, 3:28 PM CDT	Areal Flood Advisory	SJT	Jones, Taylor	107 min
May 10, 4:00 PM CDT	Areal Flood Advisory	SJT	Irion	105 min

Nearby

Flash Flood Watches in Texas, 2012 Every flash flood watch 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.