Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 146, NWS Austin/San Antonio, TX

May 19, 2000Bexar County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 19, 2000, 4:47 PM CDT for Bexar County, Texas. It was in force for 58 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: May 19, 2000, 4:47 PM CDT (21:47 UTC)
Expired: May 19, 2000, 5:45 PM CDT
In force: 58 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Bexar County, TX

The radar

The Austin/San Antonio radar (KEWX), 57 km from the middle of the area, began a volume at 21:48 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.

What was reported inside it

Time	Report	Where	Remark
May 19, 5:10 PM CDT	Hail 0.75	San Antonio, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 19, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 9.8 hours before the alert went out and 220 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: 1825 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 537 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

130 
WUUS54 KEWX 192148
SVRSAT
TXC029-192245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
447 PM CDT FRI MAY 19 2000

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  BEXAR COUNTY

* UNTIL 545 PM CDT

* AT 447 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 16 MILES SOUTH OF SAN ANTONIO...OR ABOUT 14
  MILES NORTHEAST OF POTEET...MOVING NORTH AT 20 MPH.


LAT...LON 2925 9856 2924 9843 2966 9842 2970 9863

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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 19, 3:00 PM CDT, 1 hour 47 minutes earlier.

Area forecast discussion, May 19, 3:00 PM CDT, 1 hour 47 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
300 PM CDT FRI MAY 19 2000

SURFACE BOUNDARY HAS MOVED VERY LITTLE DURING THE DAY AS EXPECTED.
NEXT UPPER TROF EXPECTED TO MOVE EASTWARD ACROSS THE AREA TONIGHT
INCREASING THE CONVECTION ACROSS OUR AREA.  THE DIFFERENT MODELS ARE
FAIRLY SIMILAR IN DEVELOPING A SLOW-MOVING EAST-WEST AREA OF RAIN
ALONG AND NORTH OF BOUNDARY AS IT SAGS SLOWLY SOUTHWARD.  SOME
TRAINING OF CONVECTION OVER THE BOUNDARY ALONG WITH THE SLOW
MOVEMENT OF THE ENTIRE SYSTEM INCREASES THE CHANCES OF HEAVY RAIN
AND THE POSSIBILITY OF LOCALIZED FLOODING.  EAST-WEST AREA MAY BE
LARGE ENOUGH TO COVER MOST OF AREA SO WILL INCLUDE ALL AREAS IN THE
WATCH.

THE SYSTEM LIKELY WILL CONTINUE TO MOVE SOUTHEASTWARD AWAY FROM THE
AREA ON SATURDAY MORNING...SO WILL LOWER POPS FOR SATURDAY AFTERNOON
AND NIGHT.  ANOTHER FAIRLY WELL ORGANIZED TROF WILL DROP
SOUTHEASTWARD AND INCREASE RAIN CHANCES AGAIN ON SUNDAY.

PRELIMS NUMBERS...
DRT 66/85/67/87 8223
AUS 65/83/66/86 8523
SAT 67/85/68/87 8523

.EWX...FLASH FLOOD WATCH TONIGHT ALL AREAS.

16/01/DC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 5:07 AM CDT	Severe Thunderstorm Warning	EWX	Edwards	53 min
May 19, 7:29 AM CDT	Severe Thunderstorm Warning	EWX	Kerr	61 min
May 19, 2:21 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	54 min
May 19, 4:45 PM CDT	Flash Flood Warning	EWX	Kerr	2 hr
May 19, 6:46 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit	59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.