Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 25, NWS Corpus Christi, TX

May 4, 2018Duval County, Jim Wells County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at May 4, 2018, 4:34 PM CDT for Duval County, Jim Wells County, Texas. It was in force for 25 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: May 4, 2018, 4:34 PM CDT (21:34 UTC)
Expired: May 4, 2018, 4:59 PM CDT
In force: 25 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Duval County, TX, Jim Wells County, TX

The radar

The Corpus Christi radar (KCRP), 78 km from the middle of the area, began a volume at 21:35 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, 9.6 hours before the alert went out and 94 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: 1166 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 538 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.4

Open this sounding in Storm Lab

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 7:19 PM CDT	Special Weather Statement	CRP	Webb	26 min
May 3, 7:55 PM CDT	Special Weather Statement	CRP	Webb	50 min
May 4, 3:43 PM CDT	Special Weather Statement	CRP	Duval	47 min
May 4, 4:07 PM CDT	Severe Thunderstorm Warning	CRP	Duval, Jim Wells	38 min
May 4, 4:19 PM CDT	Special Weather Statement	CRP	Live Oak	41 min
May 4, 4:33 PM CDT	Areal Flood Advisory	CRP	Duval	117 min
May 4, 5:03 PM CDT	Special Weather Statement	CRP	Jim Wells	42 min
May 4, 5:32 PM CDT	Special Weather Statement	CRP	Duval	43 min
May 4, 5:50 PM CDT	Severe Thunderstorm Warning	CRP	Duval, Jim Wells	19 min
May 4, 6:11 PM CDT	Special Weather Statement	CRP	Brooks	34 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018 Every severe thunderstorm warning in 2018

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.