Alert archive / Texas / Areal Flood Warnings in 2021

Areal Flood Warning 5, NWS Corpus Christi, TX

May 15, 2021Live Oak County, McMullen County, Texas

NWS Corpus Christi, TX issued this areal flood warning at May 15, 2021, 5:57 PM CDT for Live Oak County, McMullen County, Texas. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 15, 2021, 5:57 PM CDT (22:57 UTC)
Expired
May 15, 2021, 8:00 PM CDT
In force
2 hr
Issued by
NWS Corpus Christi, TX
Area
Storm-based polygon
Flood severity
None

Counties Live Oak County, TX, McMullen County, TX

The radar

The Corpus Christi radar (KCRP), 104 km from the middle of the area, began a volume at 22:56 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, 11.0 hours before the alert went out and 121 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 2021-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 581 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 2021-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
581 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
719 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
22 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 areal 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 areal flood warning went out at May 15, 4:03 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, May 15, 4:03 PM CDT, 1 hour 54 minutes before
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Hazardous weather outlook, May 15, 3:46 AM CDT, 14 hours 11 minutes before
Hazardous Weather Outlook
National Weather Service Corpus Christi TX
346 AM CDT Sat May 15 2021

TXZ229>234-239>247-342>347-442-443-447-160900-
La Salle-McMullen-Live Oak-Bee-Goliad-Victoria-Webb-Duval-
Jim Wells-Inland Kleberg-Inland Nueces-Inland San Patricio-
Coastal Aransas-Inland Refugio-Inland Calhoun-Coastal Kleberg-
Coastal Nueces-Coastal San Patricio-Aransas Islands-
Coastal Refugio-Coastal Calhoun-Kleberg Islands-Nueces Islands-
Calhoun Islands-
346 AM CDT Sat May 15 2021

This hazardous weather outlook is for South Texas.

.DAY ONE...Today and Tonight

Isolated to scattered thunderstorms are expected. A few storms could
be strong to severe. Heavy rainfall is expected which could lead to
localized flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Scattered showers and thunderstorms will be possible daily through
next week. A few storms could become strong to severe, along with a
threat of locally heavy rainfall.

There is a MODERATE risk of rip currents Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

GMZ230-235-250-255-270-275-160900-
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-
346 AM CDT Sat May 15 2021

This hazardous weather outlook is for the Middle Texas
Coastal Waters.

.DAY ONE...Today and Tonight

Isolated to scattered thunderstorms are expected tonight. A few
storms could be strong.

Small Craft Exercise Caution conditions are expected, with periods
of Small Craft Advisory conditions possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Scattered showers and thunderstorms will be possible daily from
Saturday through next week. A few storms could become strong to
possibly severe.

Small Craft Advisory conditions may be possible on and off through
next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Special weather statement, May 15, 4:35 PM CDT, 1 hour 22 minutes before
Special Weather Statement
National Weather Service Corpus Christi TX
435 PM CDT Sat May 15 2021

TXZ230-231-152215-
Live Oak-McMullen-
435 PM CDT Sat May 15 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN MCMULLEN AND
NORTHWESTERN LIVE OAK COUNTIES...

At 433 PM CDT, a strong thunderstorm was located over Choke Canyon
Reservoir, moving southeast at 15 mph.

Winds up to 40 mph and pea size hail are possible with this storm.

Locations impacted include...
Three Rivers, Choke Canyon Reservoir, Calliham, Oakville, Crowther,
Simmons, Ray Point, Esseville and Whitsett.

This includes the following highways...
 Interstate 37 between mile markers 65 and 83.
 US Highway 281 between mile markers 618 and 626.

LAT...LON 2850 9799 2824 9837 2850 9857 2864 9834
      2861 9833 2872 9818
TIME...MOT...LOC 2133Z 324DEG 15KT 2855 9832

TMT
Special weather statement, May 15, 5:41 PM CDT, 16 minutes before
Special Weather Statement
National Weather Service Corpus Christi TX
541 PM CDT Sat May 15 2021

TXZ230-231-152315-
Live Oak-McMullen-
541 PM CDT Sat May 15 2021

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL MCMULLEN AND WEST
CENTRAL LIVE OAK COUNTIES...

At 540 PM CDT, a strong thunderstorm was located near Simmons, or 10
miles south of Choke Canyon Reservoir, moving southeast at 15 mph.

Winds in excess of 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Simmons.

This includes the following highways...
 US Highway 281 near mile marker 634.
 US Highway 59 between mile markers 724 and 728.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 2836 9848 2847 9831 2830 9810 2814 9840
TIME...MOT...LOC 2240Z 326DEG 15KT 2836 9835

TMT

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 4:35 PM CDTSpecial Weather StatementCRPLive Oak40 min
May 15, 5:35 PM CDTAreal Flood AdvisoryCRPLive Oak, McMullen2 hr
May 15, 5:41 PM CDTSpecial Weather StatementCRPLive Oak34 min

Nearby

Areal Flood Warnings in Texas, 2021Every areal flood warning in 2021

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.