Alert archive / Oklahoma / Tornado Warnings in 2001
Tornado Warning 3, NWS Amarillo, TX
NWS Amarillo, TX issued this tornado warning at Apr 11, 2001, 12:18 AM CDT for Beaver County, Oklahoma. It was in force for 27 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
- Apr 11, 2001, 12:18 AM CDT (05:18 UTC)
- Expired
- Apr 11, 2001, 12:45 AM CDT
- In force
- 27 min
- Issued by
- NWS Amarillo, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Beaver County, OK
The radar
The Dodge City radar (KDDC), 109 km from the middle of the area, began a volume at 05:17 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 11, 12:20 AM CDT | Thunderstorm Wind 50 M | Slapout, OK |
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 |
|---|---|---|---|
| Apr 10, 8:30 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 11, 12:00 AM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Dodge City, (KDDC), launched 00:00Z, 5.3 hours before the alert went out and 111 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
- 27 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 2242 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 205 m²/s²
- 0-3 km storm-relative helicity
- 327 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS54 KAMA 110520 TORAMA OKC007-110545- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE AMARILLO TX 1218 AM CDT WED APR 11 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * TORNADO WARNING FOR... EASTERN BEAVER COUNTY IN THE OKLAHOMA PANHANDLE * UNTIL 1245 AM CDT * AT 1214 AM CDT...A TORNADO WAS REPORTED 2 MILES WEST OF ELMWOOD. THE MOST DANGEROUS PART OF THE STORM WAS NOW 2 MILES WEST OF SLAPOUT...MOVING NORTHEAST AT 55 MPH. * SOME LOCATIONS AFFECTED BY THE STORM INCLUDE... KNOWLES AND SLAPOUT TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU SEE OR HEAR THE TORNADO-IT MAY BE TOO LATE. TAKE COVER NOW LAT...LON 3699 10035 3652 10036 3653 10003 3700 10010 GOEHRING
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 7:55 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron | 35 min |
| Apr 10, 8:31 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron | 44 min |
| Apr 10, 11:06 PM CDT | Severe Thunderstorm Warning | AMA | Beaver, Texas | 54 min |
| Apr 10, 11:37 PM CDT | Severe Thunderstorm Warning | AMA | Beaver | 68 min |
Nearby
Tornado Warnings in Oklahoma, 2001Every tornado warning in 2001Tornadoes 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.