Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 40, NWS Corpus Christi, TX

April 17, 2015Aransas County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at Apr 17, 2015, 10:43 PM CDT for Aransas County, Texas. It was in force for 32 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 17, 2015, 10:43 PM CDT (03:43 UTC)
Expired: Apr 17, 2015, 11:15 PM CDT
In force: 32 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon

County Aransas County, TX

The radar

The Corpus Christi radar (KCRP), 50 km from the middle of the area, began a volume at 03:45 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.

Issued	Product	Office	Lasted
Apr 17, 6:57 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 3.7 hours before the alert went out and 41 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: 1803 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.1

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 17, 7:29 PM CDT, 3 hours 14 minutes earlier.

Area forecast discussion, Apr 17, 7:29 PM CDT, 3 hours 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
729 PM CDT FRI APR 17 2015

.DISCUSSION...NOTE AVIATION DISCUSSION BELOW.

&&

.AVIATION...PREDOMINATE MVFR/VFR CONDITIONS WITH IFR/LIFR
CONDITIONS LIKELY DURING/NEAR SHOWERS AND THUNDERSTORMS THIS
EVENING/TONIGHT. A TORNADO WATCH IS IN EFFECT FOR ALL OF SOUTH
TEXAS UNTIL 07Z SAT. ANTICIPATE ADDITIONAL AT LEAST ISOLD/SCT
SHOWERS DRG THE APPROXIMATELY 06-12Z SATURDAY PERIOD ALONG WITH
MVFR VISIBILITIES AT TIMES. EXPECT PREDOMINATE MVFR/VFR CEILINGS
DRG THE MID/LATE MORNING HOURS ALONG WITH POSSIBLE MVFR/IFR
CONDITIONS DRG SHOWERS/THUNDERSTORMS.

&&

.PREV DISCUSSION... /ISSUED 341 PM CDT FRI APR 17 2015/

SHORT TERM...(TONIGHT THROUGH SATURDAY)...SEVERE CONVECTION
ONGOING ACRS THE FAR NORTHERN CWA THIS AFTN ALONG THERMAL/MSTR
BNDRY. CONVECTION HAS SO FAR REMAINED CONFINED TO THE IMMEDIATE
BNDRY ITSELF DESPITE 3000-4000 J/KG CAPES AND 40+ 0-6 KM SHEAR AS
THERE REMAINS A BIT OF A CAP AROUND 800 MB. EXPECT SVR CONVECTION
TO AFFECT MAINLY THE NORTHERN CWFA THRU 00Z AS CONVECTIVE COMPLEX
PROPAGATES EAST AND ADDITIONAL CELLS DVLP AHEAD OF THE LINE.
DAMAGING STRAIGHT LINE WINDS WILL BE THE MAIN THREAT ALTHOUGH WE
HAVE SEEN PERIODS OF RELATIVE STRONG ROTATION DVLP SO A TORNADO
CANNOT BE RULED OUT. OTHER CLUSTERS OF STORMS COULD DVLP ANY TIME
LATER THIS EVENING AND OVERNIGHT AND SOME COULD BE SEVERE.
INITIAL STORM CLUSTER PRODUCED 1-2 INCHES OF RAIN VERY QUICKLY IN
THE NORTH AND WITH AN ADDITIONAL CONVECTIVE COMPLEX PSBL TNGT WILL
EXTEND THE FFA BACK WEST TO COTULLA AND CONTINUE IT THRU 12Z.

ANOTHER POTENTIALLY ACTIVE SEVERE WEATHER DAY SATURDAY WITH
PLENTIFUL SHEAR AND INSTABILITY IN PLACE. SPC HAS THE ENTIRE AREA
OUTLOOKED IN A SLIGHT RISK. DAMAGING WINDS AND LARGE HAIL LOOKS TO
BE THE MAIN THREAT.

LONG TERM (SATURDAY NIGHT THROUGH FRIDAY)...UNSETTLED WEATHER
PATTERN CONTINUES THROUGH THE EXTENDED. MODELS FORECAST A SLIGHT
LULL IN THE ACTION ON SUNDAY AS UPPER FORCING EDGES EAST OF THE
COASTAL BEND...BUT RAIN CHANCES INCREASE THROUGH THE FIRST PART OF
NEXT WEEK AS WEAK RIPPLES IN THE UPPER FLOW INTERACT WITH A
PERSISTENT SURFACE BOUNDARY AND LOTS OF AVAILABLE MOISTURE. WILL NOT
ATTEMPT TO TIME ANY OF THESE IMPULSES...INSTEAD INCLUDING SLIGHT
CHANCE TO CHANCE POPS THROUGH THE REMAINDER OF THE EXTENDED PERIOD.

TEMPERATURES TO REMAIN NEAR OR SLIGHTLY ABOVE NORMAL THROUGH THE
PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
CORPUS CHRISTI    71  82  67  86  68  /  70  50  30  20  20
VICTORIA          68  80  65  85  63  /  80  50  30  10  20
LAREDO            69  88  66  90  67  /  50  30  20  10  30
ALICE             70  84  66  89  67  /  70  50  30  10  20
ROCKPORT          71  77  69  81  69  /  70  50  30  20  20
COTULLA           65  85  64  90  64  /  80  40  20  10  20
KINGSVILLE        71  84  67  88  68  /  70  50  30  20  20
NAVY CORPUS       72  77  68  80  70  /  70  50  30  20  20

&&

.CRP WATCHES/WARNINGS/ADVISORIES...
TX...FLASH FLOOD WATCH THROUGH SATURDAY MORNING FOR THE FOLLOWING
     ZONES: ARANSAS...BEE...CALHOUN...GOLIAD...LA SALLE...LIVE
     OAK...MCMULLEN...REFUGIO...VICTORIA.

GM...NONE.

&&

WC/87...AVIATION

Hazardous weather outlook, Apr 17, 4:57 PM CDT, 5 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
457 PM CDT FRI APR 17 2015

GMZ230-235-250-255-270-275-TXZ229>234-239>247-182200-
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-
457 PM CDT FRI APR 17 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH TEXAS AND THE MIDDLE
TEXAS COASTAL WATERS.

.DAY ONE...TONIGHT

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR WEBB...LA SALLE AND
MCMULLEN COUNTIES UNTIL 7 PM CDT AND FOR ARANSAS...CALHOUN...
GOLIAD...REFUGIO...SAN PATRICIO AND VICTORIA COUNTIES UNTIL 10
PM.

THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS TONIGHT ACROSS
ALL OF SOUTH TEXAS. LARGE HAIL AND DAMAGING WINDS WILL BE THE
MAJOR THREATS. HOWEVER...AN ISOLATED TORNADO CANNOT BE RULED OUT.

A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR AREAS FROM COTULLA
THROUGH GEORGE WEST INTO VICTORIA.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE IS AN SLIGHT RISK OF SEVERE WEATHER SATURDAY AND A MARGINAL
RISK ON SUNDAY. THUNDERSTORMS WILL BE MOST LIKELY IN THE AFTERNOON
AND EVENING HOURS EACH DAY WITH LARGE HAIL AND DAMAGING WINDS
BEING THE PRIMARY THREATS. AN ISOLATED TORNADO CAN NOT BE RULED
OUT.

.SPOTTER INFORMATION STATEMENT...

DUE TO THE POTENTIAL FOR SEVERE THUNDERSTORMS...SPOTTER ACTIVATION
MAY BE NEEDED TONIGHT AND SATURDAY.

In the hours before

Local storm report, Apr 17, 9:10 PM CDT, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
910 PM CDT FRI APR 17 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0906 PM     FUNNEL CLOUD     6 NW DRISCOLL           27.73N 97.82W
04/17/2015                   NUECES             TX   TRAINED SPOTTER

            SPOTTER REPORTS FUNNEL STILL ASSOCIATED WITH STORM.

&&

LKEYS

Local storm report, Apr 17, 10:04 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1004 PM CDT FRI APR 17 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0944 PM     HAIL             CORPUS CHRISTI          27.71N 97.29W
04/17/2015  E1.00 INCH       NUECES             TX   BROADCAST MEDIA

            QUARTER SIZED HAIL IN CALALLEN.

&&

LKEYS

Special weather statement, Apr 17, 10:08 PM CDT, 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1008 PM CDT FRI APR 17 2015

TXZ239-180400-
WEBB-
1008 PM CDT FRI APR 17 2015

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

AT 1008 PM CDT...A STRONG THUNDERSTORM WAS 7 MILES WEST OF LAS
TIENDAS...OR 25 MILES WEST OF ENCINAL...MOVING NORTHEAST AT 15 MPH.

WIND GUSTS UP TO 50 MPH AND DIME SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
LAS TIENDAS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT FOR SOUTH CENTRAL
TEXAS.

LAT...LON 2779 9976 2794 9987 2814 9963 2791 9946
TIME...MOT...LOC 0308Z 236DEG 14KT 2791 9975

87

Local storm report, Apr 17, 10:23 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1023 PM CDT FRI APR 17 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1021 PM     TSTM WND GST     PORTLAND                27.88N 97.33W
04/17/2015  E60 MPH          SAN PATRICIO       TX   TRAINED SPOTTER

&&

LKEYS

Local storm report, Apr 17, 10:33 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1033 PM CDT FRI APR 17 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 PM     TSTM WND GST     4 NNE CORPUS CHRISTI    27.83N 97.49W
04/17/2015  E41 MPH          NUECES             TX   MESONET

            NUECES BAY TCOON REPORT WIND 35G41MPH

&&

LKEYS

Local storm report, Apr 17, 10:37 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1037 PM CDT FRI APR 17 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1034 PM     HAIL             1 SE GREGORY            27.91N 97.28W
04/17/2015  E1.00 INCH       SAN PATRICIO       TX   LAW ENFORCEMENT

&&

LKEYS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 17, 7:09 PM CDT	Tornado Warning	CRP	Bee, Goliad, Refugio	36 min
Apr 17, 7:15 PM CDT	Special Weather Statement	CRP	Victoria	30 min
Apr 17, 7:17 PM CDT	Special Weather Statement	CRP	Duval	28 min
Apr 17, 7:36 PM CDT	Tornado Warning	CRP	Bee, Goliad, Refugio	24 min
Apr 17, 7:42 PM CDT	Tornado Warning	CRP	Duval	33 min
Apr 17, 7:56 PM CDT	Tornado Warning	CRP	Refugio	34 min
Apr 17, 8:00 PM CDT	Tornado Warning	CRP	Duval, Jim Wells	30 min
Apr 17, 8:19 PM CDT	Special Weather Statement	CRP	San Patricio	26 min
Apr 17, 8:27 PM CDT	Tornado Warning	CRP	Jim Wells	33 min
Apr 17, 8:44 PM CDT	Tornado Warning	CRP	Nueces	31 min
Apr 17, 8:52 PM CDT	Severe Thunderstorm Warning	CRP	San Patricio	38 min
Apr 17, 8:59 PM CDT	Special Weather Statement	CRP	Calhoun	31 min
Apr 17, 8:59 PM CDT	Severe Thunderstorm Warning	CRP	Webb	17 min
Apr 17, 9:04 PM CDT	Special Weather Statement	CRP	Duval	26 min
Apr 17, 9:14 PM CDT	Tornado Warning	CRP	Nueces	31 min
Apr 17, 9:26 PM CDT	Special Marine Warning	CRP		2 hr
Apr 17, 9:41 PM CDT	Severe Thunderstorm Warning	CRP	Nueces, San Patricio	34 min
Apr 17, 10:08 PM CDT	Special Weather Statement	CRP	Webb	52 min
Apr 17, 10:08 PM CDT	Severe Thunderstorm Warning	CRP	Aransas, Nueces, San Patricio	37 min
Apr 17, 10:12 PM CDT	Severe Thunderstorm Warning	CRP	Aransas, Nueces, San Patricio	33 min
Apr 17, 10:17 PM CDT	Tornado Warning	CRP	San Patricio	28 min
Apr 17, 10:39 PM CDT	Special Marine Warning	CRP		96 min
Apr 17, 10:48 PM CDT	Special Weather Statement	CRP	Nueces	27 min
Apr 17, 10:50 PM CDT	Special Weather Statement	CRP	La Salle	25 min
Apr 17, 10:52 PM CDT	Tornado Warning	CRP	Aransas	23 min
Apr 17, 11:26 PM CDT	Special Marine Warning	CRP		64 min
Apr 17, 11:35 PM CDT	Special Weather Statement	CRP	Nueces	25 min
Apr 18, 12:08 AM CDT	Special Marine Warning	CRP		97 min
Apr 18, 1:00 AM CDT	River Flood Warning	CRP	Victoria	4 days
Apr 18, 1:40 AM CDT	Special Marine Warning	CRP		50 min
Apr 18, 2:58 AM CDT	River Flood Warning	CRP	Goliad, Victoria	22 hr
Apr 18, 10:28 AM CDT	River Flood Warning	CRP	Calhoun, Goliad, Refugio, Victoria	4 days
Apr 18, 2:03 PM CDT	Areal Flood Advisory	CRP	Bee, Live Oak, San Patricio	3 hr
Apr 18, 2:46 PM CDT	River Flood Warning	CRP	Victoria	30 hr
Apr 18, 3:49 PM CDT	Areal Flood Advisory	CRP	Aransas, San Patricio	56 min
Apr 18, 4:15 PM CDT	Special Marine Warning	CRP		60 min
Apr 18, 4:46 PM CDT	River Flood Warning	CRP	Nueces	41 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2015 Every severe thunderstorm warning in 2015

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.