Alert archive / Texas / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 17, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Apr 21, 1994, 6:48 PM CDT for Hemphill County, Texas. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Apr 21, 1994, 6:48 PM CDT (23:48 UTC)
- Expired
- Apr 21, 1994, 7:30 PM CDT
- In force
- 42 min
- Issued by
- NWS Amarillo, TX
- Area
- Whole counties
County Hemphill County, TX
The radar
The Amarillo radar (KAMA), 147 km from the middle of the area, began a volume at 23:47 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 11.8 hours before the alert went out and 146 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
- 253 J/kg
- Mixed-layer CIN
- -223 J/kg
- Mixed-layer LCL
- 1280 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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.
In the hours before
Special weather statement, Apr 21, 12:58 PM CDT, 5 hours 50 minutes before
OKZ001>003-TXZ001>026-220500- TEXAS/OKLAHOMA PANHANDLES THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE AMARILLO TX 100 PM CDT THU APR 21 1994 A SLIGHT CHANCE OF THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND EVENING ACROSS THE EASTERN TWO-THIRDS OF THE TEXAS AND OKLAHOMA PANHANDLES. HOWEVER...NONE OF THE THUNDERSTORMS ARE EXPECTED TO BECOME SEVERE. SOUTHERLY WINDS OVERNIGHT HAVE PULLED LOW LEVEL MOISTURE BACK ACROSS THE EASTERN TWO-THIRDS OF PANHANDLES WITH DEWPOINTS IN THE 50S GENERALLY EAST OF A LINE FROM GUYMON TO HEREFORD. THE RELATIVELY MOIST AND UNSTABLE SOUTHWEST WINDS WILL COLLIDE WITH A NEARLY STATIONARY SURFACE BOUNDARY ACROSS THE OKLAHOMA AND EXTREME NORTHERN TEXAS PANHANDLES TO PRODUCE ISOLATED THUNDERSTORMS BY 4 PM. SINCE THE AIRMASS ACROSS THE CENTRAL AND EASTERN PANHANDLES WILL ONLY BECOME MARGINALLY UNSTABLE AND LITTLE IF ANY UPPER LEVEL SUPPORT EXISTS...NONE OF THE THUNDERSTORMS ARE EXPECTED TO BECOME SEVERE.H SPOTTER ACTIVATION IS NOT LIKELY THIS AFTERNOON OR EVENING. DH
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 3:46 PM CDT | Severe Thunderstorm Warning | AMA | Gray | 59 min |
| Apr 21, 3:48 PM CDT | Severe Thunderstorm Warning | AMA | Randall | 25 min |
| Apr 21, 4:38 PM CDT | Severe Thunderstorm Warning | AMA | Carson | 67 min |
| Apr 21, 4:55 PM CDT | Severe Thunderstorm Warning | AMA | Hemphill, Lipscomb | 50 min |
| Apr 21, 4:59 PM CDT | Severe Thunderstorm Warning | AMA | Potter | 46 min |
| Apr 21, 5:57 PM CDT | Severe Thunderstorm Warning | AMA | Hemphill | 48 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1994Every severe thunderstorm warning in 1994
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.