Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 3, NWS San Angelo, TX
NWS San Angelo, TX issued this severe thunderstorm warning at Feb 20, 1997, 3:42 AM CST for Tom Green County, Texas. It was in force for 33 min. 1 report 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
- Feb 20, 1997, 3:42 AM CST (09:42 UTC)
- Expired
- Feb 20, 1997, 4:15 AM CST
- In force
- 33 min
- Issued by
- NWS San Angelo, TX
- Area
- Whole counties
County Tom Green County, TX
The radar
The San Angelo radar (KSJT), 5 km from the middle of the area, began a volume at 09:41 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 |
|---|---|---|---|
| Feb 20, 3:43 AM CST | Thunderstorm Wind 56 | (Sjt)Mathis Fld San, 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 nearest sounding before it
Midland Regional, TX (KMAF), launched 00:00Z, 9.7 hours before the alert went out and 175 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.
- Mixed-layer CAPE
- 319 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 963 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 20, 1:54 AM CST, 1 hour 48 minutes earlier.
Area forecast discussion, Feb 20, 1:54 AM CST, 1 hour 48 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN ANGELO TX 154 AM CST THU FEB 20 1997 BUSY NIGHT AROUND HERE AS TORNADO AND FLASH FLOOD WATCHES CONTINUE. UPPER LOW GENERATING LOTS OF SYNOPTIC SCALE LIFT...WITH FRONTAL BOUNDARY PROVIDING A SURFACE FOCUS. MOISTURE ABUNDANT...AND WITH THE SLOW MOVEMENT OF THE LOW...SHOWERS AND STORMS TO CONTINUE. WITH KSJT INDICATING 1 HOUR RAINFALL RATES OF 1 TO 2 INCHES ACROSS THE WESTERN HALF OF THE AREA...AND WITH IT LOOKING LIKE THE HEAVY RAIN WILL PERSIST THROUGH THE MORNING...WILL NEED TO KEEP FLASH FLOOD WATCHES ONGOING. AS THE 850 MB AND SURFACE LOWS PASS THROUGH THE AREA THURSDAY AFTERNOON...COLD FRONT SHOULD EVENTUALLY MAKE IT THROUGH WEST VCENTRAL TEXAS. HOWEVER...WRAP AROUND PRECIPITATION ON THE BACK SIDE OF THE UPPER LOW SHOULD PROVIDE DECENT PRECIPITATION CHANCES INTO TONIGHT AS WELL. ABI 060/042 +3 SJT 062/044 +3 PMCCULLOUGH
The office that day
Everything else NWS San Angelo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 19, 10:28 PM CST | Severe Thunderstorm Warning | SJT | Crockett | 62 min |
| Feb 20, 12:10 AM CST | Severe Thunderstorm Warning | SJT | Schleicher | 45 min |
| Feb 20, 1:52 AM CST | Flash Flood Warning | SJT | Tom Green | 2 hr |
| Feb 20, 4:04 AM CST | Severe Thunderstorm Warning | SJT | Coke | 26 min |
| Feb 20, 9:05 AM CST | Flash Flood Warning | SJT | San Saba | 3 hr |
| Feb 20, 9:15 AM CST | Flash Flood Warning | SJT | Mason | 3 hr |
| Feb 20, 9:53 AM CST | Flash Flood Warning | SJT | Callahan | 3 hr |
| Feb 20, 12:03 PM CST | Flash Flood Warning | SJT | San Saba | 4 hr |
| Feb 20, 1:15 PM CST | Severe Thunderstorm Warning | SJT | Concho | 60 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997
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.