Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 20, NWS Corpus Christi, TX

April 9, 2020Webb County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at Apr 9, 2020, 2:59 PM CDT for Webb County, Texas. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 9, 2020, 2:59 PM CDT (19:59 UTC)
Expired
Apr 9, 2020, 3:30 PM CDT
In force
31 min
Issued by
NWS Corpus Christi, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Webb County, TX

The radar

The Corpus Christi radar (KCRP), 179 km from the middle of the area, began a volume at 19:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 9, 2:47 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 8.0 hours before the alert went out and 196 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 2020-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1938 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 2020-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 square meters per square second.19395878Sfc1 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
1938 J/kg
Mixed-layer CIN
-226 J/kg
Mixed-layer LCL
1008 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
-17 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Apr 9, 1:05 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Apr 9, 1:05 PM CDT, 1 hour 54 minutes before
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Hazardous weather outlook, Apr 9, 5:15 AM CDT, 9 hours 44 minutes before
Hazardous Weather Outlook
National Weather Service Corpus Christi TX
515 AM CDT Thu Apr 9 2020

TXZ229>234-239>247-342>347-442-443-447-101015-
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-
515 AM CDT Thu Apr 9 2020

This hazardous weather outlook is for South Texas.

.DAY ONE...Today and Tonight

Scattered to numerous thunderstorms are likely this afternoon
through tonight over much of the region. Some of these storms are
likely to become severe with very large hail and damaging winds.
Locally heavy rain and minor flooding are also possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Isolated to scattered thunderstorms are expected Friday through
Saturday night. Some of the storms Saturday could become strong to
severe with large hail and damaging winds.

Minor coastal flooding during high tides will be possible Thursday
through Sunday for the Middle Texas coast.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to relay reports of severe weather and
flooding while following local, state, and CDC guidelines. Use
hashtags #ccspotter and #txwx

GMZ230-235-250-255-270-275-101015-
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-
515 AM CDT Thu Apr 9 2020

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

.DAY ONE...Today and Tonight

Patchy dense fog is possible this morning for the bays and
nearshore waters.

Scattered to numerous thunderstorms are expected this evening and
overnight mainly for the bays and nearshore waters. Strong and
severe thunderstorms will be possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Isolated to scattered thunderstorms are expected Friday through
Saturday night. A few strong and severe storms are possible Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 1:53 PM CDTRiver Flood WarningCRPCalhoun, Refugio, Victoria32 hr
Apr 9, 3:27 PM CDTSevere Thunderstorm WarningCRPWebb18 min
Apr 9, 3:43 PM CDTSevere Thunderstorm WarningCRPWebb34 min
Apr 9, 3:59 PM CDTAreal Flood AdvisoryCRPWebb61 min
Apr 9, 4:14 PM CDTSpecial Weather StatementCRPLa Salle31 min
Apr 9, 5:01 PM CDTSpecial Weather StatementCRPLa Salle29 min
Apr 9, 6:33 PM CDTSevere Thunderstorm WarningCRPLa Salle, Webb42 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning 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.