Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 55, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at May 9, 2001, 10:56 PM CDT for Hemphill County, Texas. It was in force for 44 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 9, 2001, 10:56 PM CDT (03:56 UTC)
- Expired
- May 9, 2001, 11:40 PM CDT
- In force
- 44 min
- Issued by
- NWS Amarillo, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Hemphill County, TX
The radar
The Amarillo radar (KAMA), 148 km from the middle of the area, began a volume at 03:57 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 9, 11:15 PM CDT | Hail 0.75 | Canadian, 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, 3.9 hours before the alert went out and 147 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
- 1245 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 2294 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KAMA 100357 SVRAMA TXC211-100440- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AMARILLO TX 1056 PM CDT WED MAY 9 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN HEMPHILL COUNTY IN THE TEXAS PANHANDLE * UNTIL 1140 PM CDT * AT 1056 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES WEST OF CANADIAN...MOVING EAST AT 35 MPH. * SOME LOCATIONS AFFECTED BY THE STORM INCLUDE... CANADIAN...GLAZIER AND LAKE MARVIN DESTRUCTIVE WINDS CAN BE EXPECTED. IF YOU CANNOT GET UNDERGROUND...GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS LAT...LON 3605 10054 3576 10052 3576 10001 3605 10001
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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 9, 6:29 PM CDT, 4 hours 27 minutes earlier.
Area forecast discussion, May 9, 6:29 PM CDT, 4 hours 27 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 629 PM CDT WED MAY 9 2001 UPDATED ZNS TO INCREASE POPS TO AREAL COVERAGE TERMS IN NE ZNS. LINE OF STORMS ACROSS OK PNHDL STEADILY MOVING E INTO THAT AREA. LATEST HAND/OBJ ANLYS SHOWS SECONDARY N/S CONVERGENCE LINE ACROSS ERN ZNS WITH HIGHEST SFC BASED INSTABILITY TO THE E IN WRN OK. EXPECT STORMS TO MAINTAIN INTENSITY OR STRENGTHEN AS THEY MOVE E INTO BEAVER CO. SO FAR ONLY GUSTY WINDS AND SMALL HAIL HV BEEN REPORTED. OTHER MORE SCT STORMS ACROSS ERN NM MOVING E INTO WRN ZNS...CURRENT POP COVERAGE IN W LOOKS GOOD. .AMA... TX...NONE. OK...NONE. COBB
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 7:18 PM CDT | Severe Thunderstorm Warning | AMA | Dallam, Hartley | 42 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001
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.