Alert archive / Texas / Special Weather Statements in 2015

Special Weather Statement, NWS Austin/San Antonio, TX

April 22, 2015Medina County, Texas

NWS Austin/San Antonio, TX issued this special weather statement at Apr 22, 2015, 1:02 PM CDT for Medina County, Texas. It was in force for 43 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 22, 2015, 1:02 PM CDT (18:02 UTC)
Expired: Apr 22, 2015, 1:45 PM CDT
In force: 43 min
Issued by: NWS Austin/San Antonio, TX

County Medina County, TX

The radar

The Laughlin AFB radar (KDFX), 97 km from the middle of the area, began a volume at 18:03 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, 6.0 hours before the alert went out and 257 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: 856 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this special weather statement went out at Apr 22, 12:42 PM CDT, 20 minutes earlier.

Area forecast discussion, Apr 22, 12:42 PM CDT, 20 minutes before

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Hazardous weather outlook, Apr 22, 6:11 AM CDT, 6 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
611 AM CDT WED APR 22 2015

TXZ171>173-183>194-202>209-217>225-228-231115-
LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA-
GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE-
MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA-
FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT-
611 AM CDT WED APR 22 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ALONG AND EAST OF
A LINE FROM FREDERICKSBURG TO KARNES CITY...AND ISOLATED SEVERE
THUNDERSTORMS ARE POSSIBLE OVER THE REMAINDER OF SOUTH CENTRAL
TEXAS. THERE IS EXPECTED TO BE A MODERATE CAP IN PLACE THAT WILL
PRECLUDE MOST STORM DEVELOPMENT BUT BE WEAKER OVER EASTERN
COUNTIES. ANY THUNDERSTORM THAT FORMS WILL BE CAPABLE OF PRODUCING
LARGE HAIL AND DAMAGING WINDS. TIMING OF THE THUNDERSTORM THREATS
IS MAINLY EXPECTED BETWEEN 2 PM AND MIDNIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTH
CENTRAL TEXAS THURSDAY THROUGH FRIDAY NIGHT. THE MAIN THREATS
THROUGH THIS PERIOD WILL BE LARGE HAIL AND DAMAGING WIND GUSTS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED WEDNESDAY THROUGH FRIDAY
AFTERNOONS.

In the hours before

Special weather statement, Apr 22, 11:47 AM CDT, 1 hour 15 minutes before

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Special weather statement, Apr 22, 12:14 PM CDT, 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1214 PM CDT WED APR 22 2015

TXZ203-221800-
UVALDE TX-
1214 PM CDT WED APR 22 2015

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN UVALDE COUNTY UNTIL 100
PM CDT...

AT 1214 PM CDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR CONCAN TO 7 MILES
NORTHWEST OF UVALDE...AND MOVING NORTHEAST AT 25 MPH.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
UVALDE...SABINAL...CONCAN...KNIPPA AND UTOPIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 2962 9942 2929 9944 2918 9996 2961 9969
TIME...MOT...LOC 1714Z 231DEG 21KT 2950 9970 2926 9989

JR

Special weather statement, Apr 22, 1:02 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
102 PM CDT WED APR 22 2015

TXZ203-204-221845-
MEDINA TX-UVALDE TX-
102 PM CDT WED APR 22 2015

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MEDINA AND EAST CENTRAL
UVALDE COUNTIES UNTIL 145 PM CDT...

AT 102 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
SABINAL...OR 17 MILES WEST OF HONDO...MOVING NORTHEAST AT 35 MPH.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
HONDO...SABINAL...NEW FOUNTAIN...DUNLAY...D'HANIS...BADER AND QUIHI.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 2915 9947 2932 9955 2956 9901 2931 9889
TIME...MOT...LOC 1802Z 247DEG 29KT 2927 9943

JR

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 22, 11:47 AM CDT	Special Weather Statement	EWX	Uvalde	28 min
Apr 22, 12:14 PM CDT	Special Weather Statement	EWX	Uvalde	46 min
Apr 22, 1:43 PM CDT	Special Weather Statement	EWX	Medina	32 min
Apr 22, 1:48 PM CDT	Special Weather Statement	EWX	Medina	42 min
Apr 22, 2:02 PM CDT	Special Weather Statement	EWX	Bexar	43 min
Apr 22, 2:16 PM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar	119 min
Apr 22, 2:20 PM CDT	Special Weather Statement	EWX	Wilson	40 min
Apr 22, 2:41 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa	34 min
Apr 22, 2:51 PM CDT	Areal Flood Advisory	EWX	Wilson	114 min
Apr 22, 3:03 PM CDT	Special Weather Statement	EWX	Karnes	42 min
Apr 22, 3:18 PM CDT	Areal Flood Advisory	EWX	Atascosa, Karnes	117 min
Apr 22, 3:37 PM CDT	Special Weather Statement	EWX	Karnes	38 min
Apr 22, 3:50 PM CDT	Special Weather Statement	EWX	Karnes	25 min
Apr 22, 6:42 PM CDT	Areal Flood Advisory	EWX	Karnes	2 hr

Nearby

Special Weather Statements in Texas, 2015 Every special weather statement 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.