Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 158, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Jul 20, 2000, 11:08 PM CDT for Beaver County, Oklahoma. It was in force for 37 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
- Jul 20, 2000, 11:08 PM CDT (04:08 UTC)
- Expired
- Jul 20, 2000, 11:45 PM CDT
- In force
- 37 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), 117 km from the middle of the area, began a volume at 04:12 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 |
|---|---|---|---|
| Jul 20, 11:20 PM CDT | Thunderstorm Wind 60 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 nearest sounding before it
Dodge City, (KDDC), launched 00:00Z, 4.1 hours before the alert went out and 120 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
- 2430 J/kg
- Mixed-layer CIN
- -117 J/kg
- Mixed-layer LCL
- 1215 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 531 m²/s²
- Significant tornado parameter
- 3.8
- Supercell composite
- 54.8
The text
As transmitted, in the capitals the NWS used until 2016.
743 WUUS54 KAMA 210410 SVRAMA OKC007-210445- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AMARILLO TX 1108 PM CDT THU JUL 20 2000 THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BEAVER COUNTY IN THE OKLAHOMA PANHANDLE * UNTIL 1145 PM CDT * AT 1105 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES EAST OF BEAVER...MOVING EAST AT 20 MPH. * SOME LOCATIONS AFFECTED BY THE STORM INCLUDE... BEAVER...BALKO...ELMWOOD...FORGAN...GRAY...KNOWLES...MOCANE AND SLAPOUT LARGE HAIL...DAMAGING WINDS...AND TORRENTIAL RAINS ARE EXPECTED WITH THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER. LAT...LON 3697 10048 3655 10088 3651 10004 3681 10003
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 Jul 20, 8:45 PM CDT, 2 hours 23 minutes earlier.
Area forecast discussion, Jul 20, 8:45 PM CDT, 2 hours 23 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 845 PM CDT THU JUL 20 2000 ISSUED UPDT TO ZONE FCSTS FOR OKLA PNHDL. INCRSD PERCENTAGES OF AREAL QUALIFIERS WEST...AND REPLACED LIKELY POPS IN WRN AND CNTRL SXNS WITH CATEGORICAL RAIN AND TSTMS. THIS WAS DONE DUE TO RADAR TRENDS...AND STG CNVGNC OF SFC WNDS AND SFC THETA-E CONTG OVR THIS AREA. INCLUDED MENTION OF SVR IN WRN...IN ADDITION TO CNTRL AND ERN SXNS ALREADY COVERED FM 345 PM ZONES. ADJUSTED 1ST PD WNDS ALSO. NO CHANGES TO LATER PDS. 03 .AMA... TX...NONE. OK...NONE. COCKRELL/SLATTERY
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 10:21 PM CDT | Severe Thunderstorm Warning | AMA | Beaver, Texas | 54 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2000Every severe thunderstorm warning in 2000
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.