Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 30, NWS Corpus Christi, TX

July 11, 2012Victoria County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Jul 11, 2012, 2:21 PM CDT for Victoria County, Texas. It was in force for 84 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 11, 2012, 2:21 PM CDT (19:21 UTC)
Expired: Jul 11, 2012, 3:45 PM CDT
In force: 84 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon
Flood severity: None

County Victoria County, TX

The radar

The Corpus Christi radar (KCRP), 134 km from the middle of the area, began a volume at 19:22 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 7.4 hours before the alert went out and 134 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: 2040 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 702 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

036 
WGUS54 KCRP 111921
FFWCRP
TXC469-112045-
/O.NEW.KCRP.FF.W.0030.120711T1921Z-120711T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
221 PM CDT WED JUL 11 2012

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN VICTORIA COUNTY IN SOUTHEAST TEXAS...

* UNTIL 345 PM CDT

* AT 217 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAINFALL FROM OAK VILLAGE TO NEAR
  VICTORIA. DOPPLER RADAR ESTIMATED 2 TO 3 INCHES OF RAIN HAS FALLEN
  NEAR OAK VILLAGE SINCE 115 PM. ANY ADDITIONAL RAINFALL WILL 
  BECOME RUNOFF.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLOODING TO OCCUR.
  SOME CITIES AND TOWNS THAT WILL EXPERIENCE FLOODING INCLUDE...
  VICTORIA...DOWNTOWN VICTORIA...INEZ...MISSION VALLEY...NURSERY AND
  OAK VILLAGE. SOME CREEKS THAT WILL EXPERIENCE FLOODING INCLUDE...  
  SPRING CREEK AND GARCITAS CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

&&

LAT...LON 2904 9685 2901 9682 2894 9680 2890 9675
      2888 9674 2865 9716 2874 9718 2878 9716
      2885 9720 2886 9723 2888 9724 2907 9694

$$

TMT

What forecasters said that day

The local office's own words before this flash flood warning 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 warning went out at Jul 11, 12:43 PM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, Jul 11, 12:43 PM CDT, 1 hour 38 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1243 PM CDT WED JUL 11 2012

.DISCUSSION...SEE AVIATION SECTION FOR 18Z TAFS.

&&

.AVIATION...ABUNDANT TROPICAL MOISTURE AND WEAK LOW LEVEL
BOUNDARY PROVIDING FOCUS FOR CONVECTIVE DEVELOPMENT WILL KEEP
THREAT OF SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS OVER
SOUTH TEXAS INTO THIS EVENING. EXPECT MAINLY MVFR CEILINGS WITH
THE CONVECTION BUT IFR VSBYS WILL BE POSSIBLE IN THE HEAVY
DOWNPOURS. EXPECT ACTIVITY WILL SHIFT BACK TO THE SOUTHWEST
INTO THE BRUSH COUNTRY FOR THIS EVENING BEFORE REDEVELOPMENT
OCCURS ALONG THE COASTAL CONVERGENCE ZONE TOWARD DAYBREAK.

&&

.PREV DISCUSSION... /ISSUED 1012 AM CDT WED JUL 11 2012/

DISCUSSION...WENT AHEAD AND ISSUED A FLASH FLOOD WATCH FOR THE
VICTORIA CROSSROADS REGION. ABUNDANT MOISTURE WITH PRECIPITABLE
WATER VALUES AROUND 2.3 INCHES...THE WEAK MID LEVEL SHEAR AXIS
ALONG WITH THE WEAK SURFACE BOUNDARY OVER THE COASTAL PLAINS WILL
MAINTAIN FOCUS FOR ADDITIONAL DEVELOPMENT THROUGH THE AFTERNOON.
THIS AREA RECEIVED 3 TO 6 INCHES OF RAIN SINCE YESTERDAY WITH
CORRESPONDING FLASH FLOOD GUIDANCE FALLING DUE TO SATURATED
CONDITIONS. EXPECT ACTIVITY WILL SLOWLY SHIFT TO THE SOUTHWEST
INTO THE BRUSH COUNTRY THIS AFTERNOON INTO THIS EVENING. THE LATEST
MODELS INDICATE THE LOW LEVEL CONVERGENCE MAXIMUM MOVING BACK INTO
THIS REGION. KEPT THE MENTION OF LOCALLY HEAVY RAIN FOR ALL AREAS
TODAY. RAISED POPS SLIGHTLY AND LOWERED THE MAX TEMPS OVER THE
NORTHEAST AREAS ESPECIALLY.

&&

.PRELIMINARY POINT TEMPS/POPS...
CORPUS CHRISTI    89  77  91  75  90  /  70  30  50  20  30
VICTORIA          82  74  88  74  89  /  90  50  50  20  40
LAREDO            94  79  96  77  95  /  60  50  30  20  20
ALICE             90  76  93  74  91  /  80  40  40  20  30
ROCKPORT          86  80  88  78  89  /  80  40  50  30  30
COTULLA           91  77  94  74  95  /  80  50  30  20  10
KINGSVILLE        91  76  94  75  92  /  70  40  40  20  30
NAVY CORPUS       86  79  89  79  89  /  70  30  40  30  30

&&

.CRP WATCHES/WARNINGS/ADVISORIES...
TX...FLASH FLOOD WATCH UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING
     ZONES: ARANSAS...CALHOUN...GOLIAD...REFUGIO...VICTORIA.

GM...NONE.

&&

TMT/89...SHORT TERM/AVIATION

Hazardous weather outlook, Jul 11, 10:29 AM CDT, 3 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1029 AM CDT WED JUL 11 2012

GMZ230-235-250-255-270-275-TXZ229>234-239>247-120015-
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-
1029 AM CDT WED JUL 11 2012

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

.DAY ONE...TODAY AND TONIGHT

A FLASH FLOOD WATCH IS IN EFFECT TODAY FOR THE VICTORIA CROSSROADS
AREA. SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL WILL
CONTINUE OVER THIS AREA TODAY. THIS COULD LEAD TO FLASH FLOODING
NORTHEAST OF A LINE FROM ROCKPORT TO CHARCO WHERE THE GROUND IS
ALREADY SATURATED. SHOWERS AND THUNDERSTORMS WILL BE CAPABLE OF
PRODUCING CLOUD TO GROUND LIGHTNING AND LOCALLY HEAVY RAINFALL
THROUGH TONIGHT FOR THE REST OF SOUTH TEXAS ALSO...WITH FLOODING
OF URBAN AREAS AND SMALL STREAMS POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS MUCH OF
SOUTH TEXAS THROUGH TUESDAY. THE MAIN CONCERN WITH THE THUNDERSTORMS
THROUGH EARLY NEXT WEEK WILL BE ISOLATED LOCALLY HEAVY RAINFALL. A
FEW STORMS COULD ALSO PRODUCE WINDS OF 40 TO 50 MPH ALONG WITH
FREQUENT LIGHTNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

TMT/RG/GW

In the hours before

Local storm report, Jul 11, 1:03 PM CDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
103 PM CDT WED JUL 11 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1232 PM     FLASH FLOOD      6 SW PORT LAVACA        28.55N 96.69W
07/11/2012                   CALHOUN            TX   LAW ENFORCEMENT

            MINOR FLOODING OVER A WOODEN BRIDGE ALONG MATSON
            ADDITION...NEAR CHOCOLATE BAYOU.

&&

LKEYS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 4:44 AM CDT	Areal Flood Advisory	CRP	Victoria	91 min
Jul 11, 8:56 AM CDT	Flash Flood Warning	CRP	Goliad, Victoria	2 hr
Jul 11, 9:59 AM CDT	Flash Flood Watch	CRP	Aransas, Calhoun, Goliad, Refugio, Victoria	29 hr
Jul 11, 10:36 AM CDT	Flash Flood Warning	CRP	Calhoun	114 min
Jul 11, 10:59 AM CDT	Flash Flood Warning	CRP	Goliad, Victoria	2 hr
Jul 11, 11:25 AM CDT	Areal Flood Advisory	CRP	Aransas, Refugio	50 min
Jul 11, 12:31 PM CDT	Flash Flood Warning	CRP	Aransas, Calhoun, Refugio	119 min
Jul 11, 1:53 PM CDT	Areal Flood Advisory	CRP	Bee	52 min
Jul 11, 2:29 PM CDT	Flash Flood Warning	CRP	Aransas, Calhoun, Refugio	2 hr
Jul 11, 4:26 PM CDT	Areal Flood Warning	CRP	Calhoun	3 hr

Nearby

Flash Flood Warnings in Texas, 2012 Every flash flood warning 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.