Alert archive / Texas / Special Weather Statements in 2020

Special Weather Statement, NWS Corpus Christi, TX

March 21, 2020Live Oak County, Texas

NWS Corpus Christi, TX issued this special weather statement at Mar 21, 2020, 9:13 AM CDT for Live Oak County, Texas. It was in force for 47 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
Mar 21, 2020, 9:13 AM CDT (14:13 UTC)
Expired
Mar 21, 2020, 10:00 AM CDT
In force
47 min
Issued by
NWS Corpus Christi, TX

County Live Oak County, TX

The radar

The Corpus Christi radar (KCRP), 117 km from the middle of the area, began a volume at 14:13 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, 2.2 hours before the alert went out and 133 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 2020-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 2020-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 344 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
465 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
344 m²/s²
0-3 km storm-relative helicity
425 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.9

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Mar 21, 6:14 AM CDT, 2 hours 59 minutes earlier.

Area forecast discussion, Mar 21, 6:14 AM CDT, 2 hours 59 minutes before
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Hazardous weather outlook, Mar 21, 4:50 AM CDT, 4 hours 23 minutes before
Hazardous Weather Outlook
National Weather Service Corpus Christi TX
450 AM CDT Sat Mar 21 2020

TXZ229>234-239>247-342>347-442-443-447-221000-
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-
450 AM CDT Sat Mar 21 2020

This hazardous weather outlook is for South Texas.

.DAY ONE...Today and Tonight

Isolated thunderstorms expected today.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

GMZ230-235-250-255-270-275-221000-
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-
450 AM CDT Sat Mar 21 2020

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

.DAY ONE...Today and Tonight

Small Craft Advisory for strong winds in effect through 1 PM for
the gulf waters. Winds should diminish to below advisory levels
during the rest of the afternoon.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Brief SCA conditions possible for the offshore waters Monday
night through Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

CB/LS

In the hours before

Local storm report, Mar 21, 6:34 AM CDT, 2 hours 39 minutes before
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Special weather statement, Mar 21, 7:59 AM CDT, 1 hour 14 minutes before
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Special weather statement, Mar 21, 8:37 AM CDT, 36 minutes before
Special Weather Statement
National Weather Service Corpus Christi TX
837 AM CDT Sat Mar 21 2020

TXZ230-231-211415-
Live Oak-McMullen-
837 AM CDT Sat Mar 21 2020

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

At 836 AM CDT, a strong thunderstorm was located near Simmons, or 10
miles south of Choke Canyon, moving northeast at 25 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Three Rivers, Choke Canyon, Calliham, Crowther, Simmons, Whitsett and
Esseville.

If outdoors, consider seeking shelter inside a building.

LAT...LON 2862 9806 2858 9804 2826 9833 2836 9855
      2864 9838 2864 9834 2861 9833 2870 9821
TIME...MOT...LOC 1336Z 216DEG 22KT 2836 9838

PH
Special weather statement, Mar 21, 9:13 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Corpus Christi TX
913 AM CDT Sat Mar 21 2020

TXZ230-231-211500-
Live Oak-McMullen-
913 AM CDT Sat Mar 21 2020

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN MCMULLEN
AND NORTHWESTERN LIVE OAK COUNTIES...

At 913 AM CDT, strong thunderstorms were clustered over Choke Canyon,
moving north at 20 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Three Rivers, Choke Canyon, Calliham, Crowther, Simmons, Whitsett and
Esseville.

LAT...LON 2875 9807 2835 9822 2838 9848 2864 9841
      2864 9834 2861 9833 2879 9810
TIME...MOT...LOC 1413Z 199DEG 19KT 2854 9832

PH

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 21, 1:05 AM CDTSmall Craft AdvisoryCRP12 hr
Mar 21, 7:59 AM CDTSpecial Weather StatementCRPLive Oak31 min
Mar 21, 8:37 AM CDTSpecial Weather StatementCRPLive Oak38 min
Mar 21, 10:38 AM CDTSpecial Weather StatementCRPLive Oak37 min
Mar 21, 11:33 AM CDTSpecial Weather StatementCRPKarnes27 min
Mar 21, 11:35 AM CDTSpecial Weather StatementCRPDuval40 min
Mar 21, 11:38 AM CDTAreal Flood AdvisoryCRPBee, Live Oak, McMullen82 min
Mar 21, 1:04 PM CDTSpecial Weather StatementCRPJim Wells41 min
Mar 21, 1:24 PM CDTSevere Thunderstorm WarningCRPVictoria36 min
Mar 21, 1:44 PM CDTSpecial Weather StatementCRPNueces46 min
Mar 21, 1:59 PM CDTSevere Thunderstorm WarningCRPVictoria31 min
Mar 21, 2:21 PM CDTSevere Thunderstorm WarningCRPNueces, San Patricio24 min
Mar 21, 2:23 PM CDTSpecial Marine WarningCRP37 min

Nearby

Special Weather Statements in Texas, 2020Every special weather statement in 2020

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.