Alert archive / Texas / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 269

May 21, 200110 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at May 21, 2001, 5:15 PM CDT for 10 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 21, 2001, 5:15 PM CDT (22:15 UTC)
Expired: May 21, 2001, 10:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Brooks County, TX, Cameron County, TX, Duval County, TX, Hidalgo County, TX, Jim Hogg County, TX, Kenedy County, TX, Kleberg County, TX, Starr County, TX, Willacy County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 98 km from the middle of the area, began a volume at 22:18 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.

Warnings issued inside it

15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 21, 5:35 PM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg	55 min
May 21, 5:40 PM CDT	Flash Flood Warning	BRO	Jim Hogg	3 hr
May 21, 6:00 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	60 min
May 21, 6:19 PM CDT	Tornado Warning	BRO	Brooks, Jim Hogg, Starr	56 min
May 21, 6:19 PM CDT	Tornado Warning	BRO	Hidalgo	56 min
May 21, 6:55 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr	65 min
May 21, 7:08 PM CDT	Severe Thunderstorm Warning	CRP	Duval, Jim Wells	67 min
May 21, 7:13 PM CDT	Tornado Warning	BRO	Brooks, Hidalgo, Kenedy	62 min
May 21, 7:19 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	56 min
May 21, 7:50 PM CDT	Flash Flood Warning	BRO	Starr	3 hr
May 21, 8:01 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr	59 min
May 21, 8:39 PM CDT	Severe Thunderstorm Warning	CRP	Kleberg, Nueces	66 min
May 21, 8:44 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	61 min
May 21, 9:06 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	54 min
May 21, 9:14 PM CDT	Tornado Warning	BRO	Hidalgo	46 min

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.3 hours before the alert went out and 101 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: 1153 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 718 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 11:15 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 20 more	5 hr
May 21, 1:45 PM CDT	Severe Thunderstorm Watch	SPC	Hardin, Jasper, Jefferson, Newton, Orange, Panola and 4 more	5 hr
May 21, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	Aransas, Austin, Bee, Brazoria, Calhoun, Chambers and 18 more	5 hr

Nearby

Severe Thunderstorm Watches in Texas, 2001 Every severe thunderstorm watch in 2001

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.