Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 21, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Apr 21, 1997, 7:31 PM CDT for Sherman County, Texas. It was in force for 34 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
- Apr 21, 1997, 7:31 PM CDT (00:31 UTC)
- Expired
- Apr 21, 1997, 8:05 PM CDT
- In force
- 34 min
- Issued by
- NWS Amarillo, TX
- Area
- Whole counties
County Sherman County, TX
The radar
The Amarillo radar (KAMA), 117 km from the middle of the area, began a volume at 00:30 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 |
|---|---|---|---|
| Apr 21, 7:47 PM CDT | Hail 1 | Stratford, 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.5 hours before the alert went out and 118 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
- 663 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1890 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 210 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KAMA 220031 RRA SVRAMA TXC421-220105- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AMARILLO TX 731 PM CDT MON APR 21 1997 THE NATIONAL WEATHER SERVICE IN AMARILLO TX HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 805 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN THE TEXAS PANHANDLE ...NORTHWESTERN SHERMAN COUNTY AT 731 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY AMARILLO WEATHER SERVICE DOPPLER RADAR 11 MILES NORTHWEST OF STRATFORD MOVING EAST SOUTHEAST AT 25 MPH. THIS STORM HAS HAD A HISTORY OF PRODUCING GOLFBALL SIZE HAIL. THIS STORM CAN BE EXPECTED IN THE VICINITY OF... STRATFORD BY 755 PM CDT IF YOU ARE CAUzGHT OUTSIDE...SEEK REFUGE FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 7:08 PM CDT | Severe Thunderstorm Warning | AMA | Dallam | 47 min |
| Apr 21, 8:27 PM CDT | Severe Thunderstorm Warning | AMA | Sherman | 33 min |
| Apr 21, 8:39 PM CDT | Severe Thunderstorm Warning | AMA | Hutchinson | 61 min |
| Apr 21, 9:19 PM CDT | Severe Thunderstorm Warning | AMA | Hutchinson | 61 min |
| Apr 21, 9:58 PM CDT | Severe Thunderstorm Warning | AMA | Gray | 62 min |
| Apr 21, 10:31 PM CDT | Severe Thunderstorm Warning | AMA | Dallam, Hartley | 34 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.