Alert archive / Texas / Tornado Warnings in 1998

Tornado Warning 21, NWS San Angelo, TX

May 25, 1998Irion County, Texas

NWS San Angelo, TX issued this tornado warning at May 25, 1998, 6:29 PM CDT for Irion County, Texas. It was in force for 66 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 25, 1998, 6:29 PM CDT (23:29 UTC)
Expired: May 25, 1998, 7:35 PM CDT
In force: 66 min
Issued by: NWS San Angelo, TX
Area: Whole counties

County Irion County, TX

The radar

The San Angelo radar (KSJT), 47 km from the middle of the area, began a volume at 23:28 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 25, 6:56 PM CDT	Tornado F0	Mertzon, TX	Brief tornado touchdown
May 25, 7:02 PM CDT	Tornado F0	Mertzon, TX	Brief tornado touchdown

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 25, 6:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.5 hours before the alert went out and 215 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: 1809 J/kg
Mixed-layer CIN: -351 J/kg
Mixed-layer LCL: 663 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSJT 252329 RRA
TORSJT
TXC235-260035-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
629 PM CDT MON MAY 25 1998

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* TORNADO WARNING FOR...
  IRION COUNTY IN WEST CENTRAL TEXAS

* UNTIL 735 PM CDT

* AT 628 PM CDT... DOPPLER RADAR AT SAN ANGELO INDICATED A
  DEVELOPING TORNADO 15 MILES WEST OF MERTZON OR 13 MILES NORTHEAST
  OF BARNHART MOVING NORTHEAST AT 10 MPH.

* THIS STORM WILL BE NEAR...
  ARDEN BY 725 PM.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR!

MO

15

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 7:04 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	61 min
May 24, 7:58 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	62 min
May 25, 4:30 PM CDT	Severe Thunderstorm Warning	SJT	McCulloch	50 min
May 25, 4:35 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Shackelford	50 min
May 25, 5:43 PM CDT	Severe Thunderstorm Warning	SJT	Irion	62 min
May 25, 5:55 PM CDT	Tornado Warning	SJT	Irion	35 min
May 25, 6:09 PM CDT	Severe Thunderstorm Warning	SJT	Sterling	66 min
May 25, 6:21 PM CDT	Severe Thunderstorm Warning	SJT	Coke	64 min
May 25, 6:56 PM CDT	Flash Flood Warning	SJT	Irion	3 hr

Nearby

Tornado Warnings in Texas, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.