Alert archive / Texas / Flash Flood Watches in 2015

Flash Flood Watch 2, NWS San Angelo, TX

April 13, 201516 counties in Texas

NWS San Angelo, TX issued this flash flood watch at Apr 13, 2015, 4:09 PM CDT for 16 counties in Texas. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Apr 13, 2015, 4:09 PM CDT (21:09 UTC)
Expired: Apr 13, 2015, 9:41 PM CDT
In force: 6 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, Fisher County, TX, Irion County, TX, Jones County, TX, McCulloch County, TX, Nolan County, TX, Runnels County, TX, San Saba County, TX, Shackelford County, TX, Sterling County, TX, Taylor County, TX, Tom Green County, TX

The radar

The San Angelo radar (KSJT), 81 km from the middle of the area, began a volume at 21:08 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 12:00Z, 9.2 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: 54 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 1055 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 36 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 Apr 13, 3:53 PM CDT, 16 minutes earlier.

Area forecast discussion, Apr 13, 3:53 PM CDT, 16 minutes before

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Hazardous weather outlook, Apr 13, 2:25 PM CDT, 1 hour 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
225 PM CDT MON APR 13 2015

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-141930-
FISHER-NOLAN-STERLING-COKE-RUNNELS-IRION-TOM GREEN-CONCHO-
CROCKETT-SCHLEICHER-SUTTON-HASKELL-THROCKMORTON-JONES-SHACKELFORD-
TAYLOR-CALLAHAN-COLEMAN-BROWN-MCCULLOCH-SAN SABA-MENARD-KIMBLE-
MASON-
225 PM CDT MON APR 13 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING... ALONG AND NORTH OF A MERTZON...SAN ANGELO...BROWNWOOD
LINE. THIS INCLUDES THE CITIES OF ABILENE AND SWEETWATER. LARGE
HAIL AND DAMAGING WINDS ARE THE MAIN THREATS. LOCALIZED FLOODING
IS POSSIBLE DUE TO HEAVY RAINFALL FROM SLOW MOVING THUNDERSTORMS.
THERE IS ALSO A SMALL POTENTIAL FOR A LAND SPOUT...OR BRIEF WEAK
TORNADO.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THUNDERSTORMS WILL BE POSSIBLE WEDNESDAY NIGHT THROUGH SATURDAY.
A FEW STRONG TO SEVERE STORMS WILL BE POSSIBLE WITH LARGE HAIL...
DAMAGING WINDS AND DEADLY LIGHTNING. BUT THERE IS UNCERTAINTY
WITH THE FORECAST TIMING AND COVERAGE WITH THE STORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

In the hours before

Local storm report, Apr 13, 2:32 PM CDT, 1 hour 37 minutes before

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Special weather statement, Apr 13, 2:41 PM CDT, 1 hour 28 minutes before

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Local storm report, Apr 13, 2:59 PM CDT, 1 hour 10 minutes before

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Special weather statement, Apr 13, 3:03 PM CDT, 1 hour 6 minutes before

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Special weather statement, Apr 13, 3:10 PM CDT, 59 minutes before

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Special weather statement, Apr 13, 3:49 PM CDT, 20 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 12, 7:02 PM CDT	Special Weather Statement	SJT	Crockett, Sutton	28 min
Apr 12, 7:06 PM CDT	Special Weather Statement	SJT	Irion, Sterling	54 min
Apr 12, 7:29 PM CDT	Special Weather Statement	SJT	Schleicher, Sutton	46 min
Apr 12, 7:45 PM CDT	Special Weather Statement	SJT	Coke, Irion, Sterling, Tom Green	45 min
Apr 12, 8:16 PM CDT	Special Weather Statement	SJT	Tom Green	44 min
Apr 12, 8:57 PM CDT	Special Weather Statement	SJT	Nolan	33 min
Apr 12, 8:59 PM CDT	Special Weather Statement	SJT	Runnels, Tom Green	46 min
Apr 12, 9:13 PM CDT	Special Weather Statement	SJT	Taylor	47 min
Apr 12, 9:39 PM CDT	Special Weather Statement	SJT	Fisher, Jones, Taylor	51 min
Apr 12, 9:56 PM CDT	Special Weather Statement	SJT	Coleman	49 min
Apr 12, 10:06 PM CDT	Special Weather Statement	SJT	Callahan	54 min
Apr 12, 10:18 PM CDT	Special Weather Statement	SJT	Haskell, Jones, Shackelford, Throckmorton	57 min
Apr 13, 2:22 PM CDT	Special Weather Statement	SJT	Taylor	23 min
Apr 13, 2:41 PM CDT	Special Weather Statement	SJT	Taylor	34 min
Apr 13, 3:03 PM CDT	Special Weather Statement	SJT	Runnels	42 min
Apr 13, 3:10 PM CDT	Special Weather Statement	SJT	Taylor	35 min
Apr 13, 3:49 PM CDT	Special Weather Statement	SJT	Callahan	41 min
Apr 13, 4:12 PM CDT	Special Weather Statement	SJT	Coleman	48 min
Apr 13, 4:33 PM CDT	Severe Thunderstorm Warning	SJT	Coleman	42 min
Apr 13, 5:12 PM CDT	Severe Thunderstorm Warning	SJT	Brown, Callahan, Coleman	48 min
Apr 13, 5:22 PM CDT	Special Weather Statement	SJT	Coke	23 min
Apr 13, 5:57 PM CDT	Severe Thunderstorm Warning	SJT	Brown	33 min
Apr 13, 6:33 PM CDT	Special Weather Statement	SJT	Brown	27 min

Nearby

Flash Flood Watches in Texas, 2015 Every flash flood watch in 2015

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.