Alert archive / Texas / Flash Flood Watches in 2015

Flash Flood Watch 3, NWS Corpus Christi, TX

April 17, 20159 counties in Texas

NWS Corpus Christi, TX issued this flash flood watch at Apr 17, 2015, 3:20 AM CDT for 9 counties in Texas. It took effect at Apr 17, 2015, 7:00 AM CDT. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued
Apr 17, 2015, 3:20 AM CDT (08:20 UTC)
In effect from
Apr 17, 2015, 7:00 AM CDT
Expired
Apr 18, 2015, 12:00 AM CDT
In force
17 hr
Issued by
NWS Corpus Christi, TX
Flood severity
None

Counties Aransas County, TX, Bee County, TX, Calhoun County, TX, Goliad County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Refugio County, TX, Victoria County, TX

The radar

The Corpus Christi radar (KCRP), 71 km from the middle of the area, began a volume at 08:22 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

Corpus Christi, TX (KCRP), launched 00:00Z, 8.3 hours before the alert went out and 81 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-pSkew-T log-p diagram, Corpus Christi, TX at 00:00Z on 2015-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2661 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 2015-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
2661 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
705 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
2.6
Supercell composite
13.3

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 Corpus Christi, TX wrote its last area forecast discussion before this flash flood watch went out at Apr 17, 12:42 AM CDT, 2 hours 38 minutes earlier.

Area forecast discussion, Apr 17, 12:42 AM CDT, 2 hours 38 minutes before
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Hazardous weather outlook, Apr 16, 5:37 AM CDT, 21 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
537 AM CDT THU APR 16 2015

GMZ230-235-250-255-270-275-TXZ229>234-239>247-171045-
BAYS AND WATERWAYS FROM BAFFIN BAY TO PORT ARANSAS-
BAYS AND WATERWAYS FROM PORT ARANSAS TO PORT O'CONNOR-
COASTAL WATERS FROM BAFFIN BAY TO PORT ARANSAS OUT 20 NM-
COASTAL WATERS FROM PORT ARANSAS TO MATAGORDA SHIP CHANNEL OUT
20 NM-WATERS FROM BAFFIN BAY TO PORT ARANSAS FROM 20 TO 60 NM-
WATERS FROM PORT ARANSAS TO MATAGORDA SHIP CHANNEL FROM 20 TO
60 NM-LA SALLE-MCMULLEN-LIVE OAK-BEE-GOLIAD-VICTORIA-WEBB-DUVAL-
JIM WELLS-KLEBERG-NUECES-SAN PATRICIO-ARANSAS-REFUGIO-CALHOUN-
537 AM CDT THU APR 16 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH TEXAS AND THE MIDDLE
TEXAS COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY. LARGE HAIL
AND DAMAGING WINDS WILL BE THE MAJOR THREATS ALONG WITH FLASH
FLOODING. HOWEVER...AN ISOLATED TORNADO CANNOT BE RULED OUT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS AN ENHANCED RISK FOR SEVERE THUNDERSTORMS FRIDAY AND A
SLIGHT RISK IN NORTHERN COUNTIES SATURDAY. LARGE HAIL AND
DAMAGING WINDS ARE THE MAIN THREATS. AN ISOLATED TORNADO CAN NOT
BE RULED OUT.

IN ADDITION...FLASH FLOODING COULD BECOME A THREAT WITH ANY HEAVY
AND PERSISTENT RAINFALL.

.SPOTTER INFORMATION STATEMENT...

DUE TO THE POTENTIAL FOR SEVERE THUNDERSTORMS...SPOTTER ACTIVATION
MAY BE NEEDED THURSDAY THROUGH SATURDAY.

PZ/TB

The office that day

Everything else NWS Corpus Christi, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 2:46 AM CDTSpecial Marine WarningCRP44 min
Apr 17, 3:01 AM CDTSpecial Marine WarningCRP29 min
Apr 17, 10:34 AM CDTRiver Flood WarningCRPCalhoun, Refugio, Victoria14 days
Apr 17, 12:01 PM CDTSpecial Weather StatementCRPDimmit59 min
Apr 17, 1:38 PM CDTSevere Thunderstorm WarningCRPLa Salle67 min
Apr 17, 2:34 PM CDTSevere Thunderstorm WarningCRPLa Salle, McMullen56 min
Apr 17, 2:45 PM CDTTornado WarningCRPLa Salle, McMullen30 min
Apr 17, 3:31 PM CDTSevere Thunderstorm WarningCRPLive Oak, McMullen59 min
Apr 17, 3:50 PM CDTSpecial Weather StatementCRPCalhoun25 min
Apr 17, 3:54 PM CDTSevere Thunderstorm WarningCRPBee, Live Oak51 min
Apr 17, 4:05 PM CDTSpecial Weather StatementCRPGoliad25 min
Apr 17, 4:37 PM CDTSpecial Weather StatementCRPVictoria23 min
Apr 17, 4:41 PM CDTSpecial Weather StatementCRPGoliad34 min
Apr 17, 4:45 PM CDTSevere Thunderstorm WarningCRPVictoria30 min
Apr 17, 5:12 PM CDTSpecial Weather StatementCRPVictoria33 min
Apr 17, 5:27 PM CDTSpecial Weather StatementCRPLive Oak33 min
Apr 17, 5:43 PM CDTAreal Flood AdvisoryCRPVictoria62 min
Apr 17, 5:59 PM CDTSevere Thunderstorm WarningCRPLive Oak31 min
Apr 17, 6:20 PM CDTSevere Thunderstorm WarningCRPBee, Live Oak40 min
Apr 17, 6:28 PM CDTSevere Thunderstorm WarningCRPGoliad32 min
Apr 17, 6:47 PM CDTTornado WarningCRPBee28 min

Nearby

Flash Flood Watches in Texas, 2015Every 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.