Alert archive / Texas / Flash Flood Watches in 2015

Flash Flood Watch 4, NWS Corpus Christi, TX

May 11, 201515 counties in Texas

NWS Corpus Christi, TX issued this flash flood watch at May 11, 2015, 2:30 PM CDT for 15 counties in Texas. It took effect at May 11, 2015, 6:00 PM CDT. It was in force for 47 hr.

The area

The counties it named.

The facts

Issued
May 11, 2015, 2:30 PM CDT (19:30 UTC)
In effect from
May 11, 2015, 6:00 PM CDT
Expired
May 13, 2015, 5:00 PM CDT
In force
47 hr
Issued by
NWS Corpus Christi, TX
Flood severity
None

Counties Aransas County, TX, Bee County, TX, Calhoun County, TX, Duval County, TX, Goliad County, TX, Jim Wells County, TX, Kleberg County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Nueces County, TX, Refugio County, TX, San Patricio County, TX, Victoria County, TX, Webb County, TX

The radar

The Corpus Christi radar (KCRP), 50 km from the middle of the area, began a volume at 19:30 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 12:00Z, 7.5 hours before the alert went out and 66 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 12:00Z on 2015-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2111 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 12:00Z on 2015-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.193958Sfc1 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
2111 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
664 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
1.0
Supercell composite
6.2

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 May 11, 12:31 PM CDT, 1 hour 59 minutes earlier.

Area forecast discussion, May 11, 12:31 PM CDT, 1 hour 59 minutes before
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Hazardous weather outlook, May 11, 5:40 AM CDT, 8 hours 50 minutes before
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In the hours before

Special weather statement, May 11, 11:08 AM CDT, 3 hours 22 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1108 AM CDT MON MAY 11 2015

TXZ229>234-239>247-121100-
LA SALLE-MCMULLEN-LIVE OAK-BEE-GOLIAD-VICTORIA-WEBB-DUVAL-
JIM WELLS-KLEBERG-NUECES-SAN PATRICIO-ARANSAS-REFUGIO-CALHOUN-
INCLUDING THE CITIES OF...COTULLA...CALLIHAM...CROSS...
LOMA ALTA...TILDEN...GEORGE WEST...THREE RIVERS...BEEVILLE...
GOLIAD...VICTORIA...LAREDO...FREER...BENAVIDES...SAN DIEGO...
ALICE...ORANGE GROVE...KINGSVILLE...CORPUS CHRISTI...PORTLAND...
INGLESIDE...ARANSAS PASS...SINTON...MATHIS...ROCKPORT...REFUGIO...
WOODSBORO...PORT LAVACA
1108 AM CDT MON MAY 11 2015

...CONCERN FOR SEVERE THUNDERSTORMS THIS AFTERNOON THROUGH
TUESDAY NIGHT...
...POTENTIAL FOR LOCALLY HEAVY RAINFALL AND FLOODING TONIGHT
THROUGH THURSDAY...

A VERY ACTIVE WEATHER PATTERN IS IN STORE FOR SOUTH TEXAS THIS
WEEK...AS COPIOUS MOISTURE COMBINES WITH A FRONTAL BOUNDARY AND
ENERGY FROM A SLOW-MOVING UPPER LEVEL STORM SYSTEM TO PRODUCE
PERIODS OF RAIN AND THUNDERSTORMS.

FOR THIS AFTERNOON THROUGH TUESDAY NIGHT...A FRONTAL BOUNDARY
WILL PROVIDE A FOCUS FOR SHOWERS AND THUNDERSTORMS...ESPECIALLY
LATE THIS AFTERNOON AND TONIGHT. SOME OF THE STORMS HAVE THE
POTENTIAL TO BECOME SEVERE...WITH LOCALLY HEAVY RAINFALL POSSIBLE.
THE GREATEST CONCERN FOR HEAVY RAINFALL TONIGHT THROUGH TUESDAY
NIGHT WILL BE OVER AREAS NEAR AND WEST OF AN ALICE TO BEEVILLE
LINE. LOCALLY DAMAGING WINDS AND LARGE HAIL WILL BE THE MAIN
CONCERNS FOR ANY SEVERE WEATHER...ALTHOUGH AN ISOLATED TORNADO OR
TWO WILL ALSO BE POSSIBLE.

THERE IS THE POTENTIAL FOR AN ORGANIZED SYSTEM OF STORMS TO
DEVELOP LATER THIS AFTERNOON OR THIS EVENING OVER THE RIO GRANDE
PLAINS AND WESTERN BRUSH COUNTRY...THEN MOVE EAST TOWARD THE COAST
LATE THIS EVENING AND OVERNIGHT...POSSIBLY PRODUCING DAMAGING
WINDS AND HAIL ALONG WITH LOCALLY HEAVY RAINFALL. ANOTHER ROUND OF
SHOWERS AND THUNDERSTORMS ARE EXPECTED TUESDAY AND TUESDAY
NIGHT...WITH A SLIGHT RISK FOR SEVERE WEATHER ONCE AGAIN AND AN
ENHANCED RISK FOR FLOODING.

ALTHOUGH THE SURFACE FRONT IS NOT EXPECTED TO BE AN INFLUENCING
FACTOR FOR SOUTH TEXAS WEDNESDAY THROUGH FRIDAY...RAIN CHANCES
WILL CONTINUE OVER SOUTH TEXAS AS THE UPPER STORM SYSTEM REMAINS
TO THE WEST AND COPIOUS AMOUNTS OF MOISTURE CONTINUE. ALTHOUGH THE
CONCERN FOR ORGANIZED SEVERE WEATHER WILL DIMINISH BY WEDNESDAY...
THE POTENTIAL FOR FLASH FLOODING AND RIVER FLOODING WILL
INCREASE...AS ANY STORMS WHICH DEVELOP WILL LIKELY OCCUR OVER
SATURATED SOILS AND THUS LIKELY RUN OFF.

AT THIS TIME...AVERAGE RAINFALL AMOUNTS THROUGH FRIDAY ARE
EXPECTED TO AVERAGE BETWEEN 3 AND 6 INCHES OVER INLAND
AREAS...GENERALLY NEAR AND WEST OF A KINGSVILLE TO SINTON TO
BLOOMINGTON LINE...WITH THE HIGHEST RAINFALL TOTALS OVER THE RIO
GRANDE PLAINS (INCLUDING LAREDO) AND THE NORTHERN BRUSH COUNTRY.
LOWER AMOUNTS ARE EXPECTED OVER AREAS CLOSER TO THE COAST.
ISOLATED AMOUNTS OF 10 TO 15 INCHES OF PRECIPITATION ARE CERTAINLY
POSSIBLE OVER THE NEXT SEVERAL DAYS...BEFORE THE IMPACTS OF THE
UPPER LEVEL SYSTEM BEGIN TO MOVE INTO THE SOUTHERN PLAINS. A
FLASH FLOOD WATCH MAY BE ISSUED LATER TODAY FOR PORTIONS OR ALL OF
SOUTH TEXAS...OR AT LEAST WITHIN THE NEXT 24 TO 48 HOURS.

SOUTH TEXAS RESIDENTS SHOULD CONTINUE TO MONITOR THE LATEST
FORECASTS ON THIS UPCOMING HEAVY RAINFALL AND POTENTIAL SEVERE
WEATHER EVENT. STAY TUNED TO YOUR NOAA WEATHER RADIO OR LOCAL
MEDIA OUTLETS CONCERNING ANY WATCHES OR WARNINGS WHICH WILL BE
ISSUED OVER THE NEXT SEVERAL DAYS. YOU CAN ALSO KEEP TRACK OF THE
WEATHER ON OUR WEB PAGE AT (ALL LOWER CASE)...

WWW.SRH.NOAA.GOV/CRP

GW

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 3:04 PM CDTAreal Flood AdvisoryCRPDuval116 min
May 11, 3:41 PM CDTSpecial Weather StatementCRPDuval34 min
May 11, 3:47 PM CDTAreal Flood AdvisoryCRPDuval, McMullen118 min
May 11, 4:35 PM CDTAreal Flood AdvisoryCRPDuval, Webb115 min
May 11, 4:41 PM CDTSpecial Weather StatementCRPDuval49 min
May 11, 4:55 PM CDTAreal Flood AdvisoryCRPWebb2 hr
May 11, 4:55 PM CDTSevere Thunderstorm WarningCRPDuval, Webb50 min
May 11, 5:02 PM CDTFlash Flood WarningCRPDuval, Webb3 hr
May 11, 5:31 PM CDTSpecial Weather StatementCRPKarnes44 min
May 11, 5:33 PM CDTAreal Flood AdvisoryCRPBee, Live Oak117 min
May 11, 5:37 PM CDTSevere Thunderstorm WarningCRPBee, Live Oak38 min
May 11, 5:40 PM CDTAreal Flood AdvisoryCRPLa Salle, McMullen2 hr
May 11, 5:46 PM CDTSevere Thunderstorm WarningCRPDuval44 min
May 11, 6:09 PM CDTAreal Flood AdvisoryCRPDuval2 hr
May 11, 6:28 PM CDTFlash Flood WarningCRPWebb3 hr
May 11, 6:35 PM CDTAreal Flood AdvisoryCRPWebb115 min
May 11, 6:41 PM CDTSevere Thunderstorm WarningCRPDuval34 min
May 11, 6:42 PM CDTAreal Flood AdvisoryCRPBee, Goliad3 hr
May 11, 6:47 PM CDTAreal Flood AdvisoryCRPLa Salle118 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.