Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 22, NWS Corpus Christi, TX

April 17, 2017Webb County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at Apr 17, 2017, 1:31 AM 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 outline as issued.

The facts

Issued: Apr 17, 2017, 1:31 AM CDT (06:31 UTC)
Expired: Apr 17, 2017, 2:02 AM 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 Laughlin AFB radar (KDFX), 158 km from the middle of the area, began a volume at 06:33 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 6.5 hours before the alert went out and 189 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: 2034 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

649 
WUUS54 KCRP 170631
SVRCRP
TXC479-170715-
/O.NEW.KCRP.SV.W.0022.170417T0631Z-170417T0715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Corpus Christi TX
131 AM CDT MON APR 17 2017

The National Weather Service in Corpus Christi has issued a

* Severe Thunderstorm Warning for...
  Northwestern Webb County in south central Texas...

* Until 215 AM CDT

* At 130 AM CDT, severe thunderstorms were located along a line
  extending from 17 miles west of Las Tiendas to 9 miles west of
  Columbia Bridge, moving east at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Columbia Bridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2816 9972 2768 9962 2767 9972 2772 9976
      2774 9980 2778 9982 2776 9984 2779 9985
      2780 9988 2784 9988 2788 9991 2791 9990
      2794 9994 2798 9993 2800 9999 2807 10002
      2808 10005 2810 10006
TIME...MOT...LOC 0630Z 251DEG 17KT 2795 9991 2776 9988 

HAIL...1.00IN
WIND...60MPH
 
$$

CB

1 follow-up statement

666 
WWUS54 KCRP 170702
SVSCRP

Severe Weather Statement
National Weather Service Corpus Christi TX
202 AM CDT MON APR 17 2017

TXC479-170711-
/O.CAN.KCRP.SV.W.0022.000000T0000Z-170417T0715Z/
Webb TX-
202 AM CDT MON APR 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WEBB COUNTY IS
CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning has been cancelled. 

LAT...LON 2816 9972 2768 9962 2767 9972 2772 9976
      2774 9980 2778 9982 2776 9984 2779 9985
      2780 9988 2784 9988 2788 9991 2791 9990
      2794 9994 2798 9993 2800 9999 2807 10002
      2808 10005 2810 10006
TIME...MOT...LOC 0659Z 251DEG 17KT 2800 9976 2781 9973 

$$

CB

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 17, 12:40 AM CDT, 51 minutes earlier.

Area forecast discussion, Apr 17, 12:40 AM CDT, 51 minutes before

Area Forecast Discussion...UPDATED
National Weather Service Corpus Christi TX
1240 AM CDT Mon Apr 17 2017

.DISCUSSION...

Updated for the 06Z Aviation Discussion.

&&

.AVIATION...

A disturbance moving east across the Mexico/South TX border will
continue to lead to shower/thunderstorm development tonight
through Monday. Best rain chances overnight expected to affect LRD
site and may reach toward ALI late in the night...with mention of
at least VCTS for CRP-VCT by 18Z. May see a break in activity out
west for LRD around 12Z due to an overworked atmosphere but it
really depends on the progress of the mid level disturbance so
will maintain VCTS in the TAFs until at least 17Z. As rain chances
farther east at CRP-ALI-VCT begin to wind down in the evening, am
expecting some redevelopment out west for LRD after 00Z although
coverage may be less compared to this evening. For the most part,
will maintain MVFR CIGs through the period, although CIGs may lift
to VFR from ALI-CRP for a period Monday AFTN. Wind will generally
be out of the SE with gusts up to 20 KTs possible in the AFTN.

&&

.PRELIMINARY POINT TEMPS/POPS...
Corpus Christi    71  82  69  83  69  /  20  40  20  50  10
Victoria          68  82  67  84  66  /  10  40  20  50  10
Laredo            70  85  67  88  68  /  50  40  30  10  10
Alice             68  84  67  86  65  /  20  50  30  50  10
Rockport          72  80  71  83  71  /  10  30  20  40  10
Cotulla           68  82  66  86  67  /  50  50  30  10  10
Kingsville        70  84  68  86  67  /  20  50  20  50  10
Navy Corpus       73  80  72  83  72  /  10  30  20  40  10

&&

.CRP WATCHES/WARNINGS/ADVISORIES...
TX...None.
GM...None.

&&

CB/85...AVIATION

Hazardous weather outlook, Apr 16, 8:51 PM CDT, 4 hours 40 minutes before

Hazardous Weather Outlook
National Weather Service Corpus Christi TX
851 PM CDT Sun Apr 16 2017

GMZ230-235-250-255-270-275-TXZ229>234-239>247-180200-
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-La Salle-McMullen-Live Oak-Bee-Goliad-Victoria-Webb-Duval-
Jim Wells-Kleberg-Nueces-San Patricio-Aransas-Refugio-Calhoun-
851 PM CDT Sun Apr 16 2017

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

.DAY ONE...Tonight

Scattered thunderstorms will move out of Mexico into the western
Brush Country tonight. Some of these storms could become strong,
producing strong gusty winds and small hail.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Scattered to perhaps numerous showers and thunderstorms may affect
primarily inland areas during the day Monday. An isolated strong
storm may occur. Additional chances of thunderstorms will exist
across the Coastal Plains to Victoria area on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible.

In the hours before

Special weather statement, Apr 16, 10:51 PM CDT, 2 hours 40 minutes before

Special Weather Statement
National Weather Service Corpus Christi TX
1051 PM CDT SUN APR 16 2017

TXZ239-170415-
Webb-
1051 PM CDT SUN APR 16 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL WEBB COUNTY...

At 1050 PM CDT, a strong thunderstorm was located over El Cenizo, or
16 miles south of Laredo, moving northeast at 20 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Laredo, Rio Bravo and El Cenizo.

LAT...LON 2727 9949 2730 9949 2731 9950 2730 9953
      2732 9954 2734 9951 2735 9951 2741 9949
      2743 9949 2746 9945 2732 9937 2726 9945
      2727 9947 2726 9948
TIME...MOT...LOC 0350Z 241DEG 16KT 2731 9952

CB

Special weather statement, Apr 16, 11:19 PM CDT, 2 hours 12 minutes before

Special Weather Statement
National Weather Service Corpus Christi TX
1119 PM CDT SUN APR 16 2017

TXZ239-170500-
Webb-
1119 PM CDT SUN APR 16 2017

...AN AREA OF STRONG THUNDERSTORMS IS AFFECTING WESTERN AND CENTRAL
WEBB COUNTY...

At 1118 PM CDT, strong thunderstorms were clustered over the
western half of Webb county, moving northeast at 25 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Laredo, Rio Bravo, El Cenizo, Las Tiendas, Laredo International
Airport, Botines, Unitec Industrial Park, La Esperanza Ranch Airport,
Ranchos Penitas West, Columbia Bridge, Chupadera Ranch Airport,
United South High School, Texas A&M International University, St
Augustine High School South Laredo, Doctors Hospital Of Laredo,
Laredo Community College, Laredo Country Club, Orvil, Callaghan and
Ranchitos Las Lomas.

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 2820 9940 2803 9939 2804 9923 2727 9920
      2727 9933 2732 9937 2727 9949 2731 9954
      2741 9949 2749 9948 2750 9953 2757 9951
      2764 9960 2766 9971 2780 9988 2798 9993
      2800 9999 2815 10009 2820 10020
TIME...MOT...LOC 0418Z 210DEG 22KT 2787 9944

PZ

Special weather statement, Apr 16, 11:53 PM CDT, 1 hour 38 minutes before

Special Weather Statement
National Weather Service Corpus Christi TX
1153 PM CDT SUN APR 16 2017

TXZ229-239-170530-
Webb-La Salle-
1153 PM CDT SUN APR 16 2017

...AN AREA OF STRONG THUNDERSTORMS IS AFFECTING CENTRAL AND EASTERN
WEBB AND SOUTHWESTERN LA SALLE COUNTIES...

At 1152 PM CDT, strong thunderstorms were located through central
Webb county, moving northeast at 15 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Encinal, Botines, Ranchitos Las Lomas, Mirando City, La Esperanza
Ranch Airport, Oilton, Artesia Wells, Callaghan and Aguilares.

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 2820 9975 2820 9940 2830 9939 2832 9912
      2746 9893 2737 9918
TIME...MOT...LOC 0452Z 219DEG 14KT 2772 9927

PZ

Special weather statement, Apr 17, 1:20 AM CDT, 11 minutes before

Special Weather Statement
National Weather Service Corpus Christi TX
120 AM CDT MON APR 17 2017

TXZ239-170700-
Webb-
120 AM CDT MON APR 17 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN WEBB COUNTY...

At 119 AM CDT, a strong thunderstorm was located 17 miles northwest
of Columbia Bridge, or 36 miles northwest of Laredo, moving east at
20 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Columbia Bridge.

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 2811 9980 2771 9965 2770 9975 2773 9977
      2773 9979 2774 9980 2778 9982 2776 9984
      2779 9985 2780 9988 2784 9988 2788 9991
      2791 9990 2794 9994 2798 9993 2800 9999
      2805 10001
TIME...MOT...LOC 0619Z 254DEG 18KT 2788 9995

CB

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 10:51 PM CDT	Special Weather Statement	CRP	Webb	24 min
Apr 16, 11:19 PM CDT	Special Weather Statement	CRP	Webb	41 min
Apr 16, 11:53 PM CDT	Special Weather Statement	CRP	Webb	37 min
Apr 17, 1:20 AM CDT	Special Weather Statement	CRP	Webb	40 min
Apr 17, 2:00 AM CDT	Special Weather Statement	CRP	Webb	45 min
Apr 17, 2:13 AM CDT	Special Weather Statement	CRP	Webb	47 min
Apr 17, 2:23 AM CDT	Severe Thunderstorm Warning	CRP	Webb	52 min
Apr 17, 2:40 AM CDT	Areal Flood Advisory	CRP	Webb	2 hr
Apr 17, 3:10 AM CDT	Severe Thunderstorm Warning	CRP	Duval, Webb	50 min
Apr 17, 4:01 AM CDT	Severe Thunderstorm Warning	CRP	Duval, Jim Wells, Kleberg, Nueces	44 min
Apr 17, 4:45 AM CDT	Special Weather Statement	CRP	Jim Wells, Kleberg	30 min
Apr 17, 5:15 AM CDT	Special Weather Statement	CRP	Kleberg, Nueces, San Patricio	60 min
Apr 17, 8:25 AM CDT	River Flood Warning	CRP	Webb	3 days
Apr 17, 9:32 AM CDT	Special Weather Statement	CRP	Kleberg, Nueces	43 min
Apr 17, 11:31 AM CDT	Special Weather Statement	CRP	Victoria	29 min
Apr 17, 2:05 PM CDT	Special Weather Statement	CRP	Calhoun	40 min
Apr 17, 2:32 PM CDT	Areal Flood Advisory	CRP	Calhoun	58 min
Apr 17, 2:45 PM CDT	Flash Flood Warning	CRP	Calhoun	2 hr
Apr 17, 2:50 PM CDT	Special Weather Statement	CRP	Calhoun	25 min
Apr 17, 3:30 PM CDT	Special Weather Statement	CRP	Calhoun	15 min
Apr 17, 4:46 PM CDT	Special Weather Statement	CRP	Jim Hogg	29 min
Apr 17, 5:20 PM CDT	Severe Thunderstorm Warning	CRP	Kleberg	25 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning in 2017

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.