Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 50, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Apr 30, 2001, 8:15 PM CDT for Beaver County, Oklahoma. It was in force for 60 min. No storm report in the archive falls 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.
The facts
- Issued
- Apr 30, 2001, 8:15 PM CDT (01:15 UTC)
- Expired
- Apr 30, 2001, 9:15 PM CDT
- In force
- 60 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), 126 km from the middle of the area, began a volume at 01:15 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
Dodge City, (KDDC), launched 00:00Z, 1.3 hours before the alert went out and 129 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
- 85 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 3013 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KAMA 010116 SVRAMA OKC007-010215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AMARILLO TX 815 PM CDT MON APR 30 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL BEAVER COUNTY IN THE OKLAHOMA PANHANDLE * UNTIL 915 PM CDT * AT 815 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES SOUTH OF BEAVER...MOVING SOUTH AT 10 MPH. * SOME LOCATIONS AFFECTED BY THE STORM INCLUDE... ELMWOOD LARGE HAIL...DAMAGING WINDS...AND TORRENTIAL RAINS ARE EXPECTED WITH THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER. LAT...LON 3678 10036 3676 10062 3651 10064 3651 10g029
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 Apr 30, 4:25 PM CDT, 3 hours 50 minutes earlier.
Area forecast discussion, Apr 30, 4:25 PM CDT, 3 hours 50 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 425 PM CDT MON APR 30 2001 MAIN MID LEVEL SHORTWAVE PASSING WELL TO THE NORTH OF RGN TODAY HAS BEEN UNDERGOING SHEAR ALONG ITS BASE WITH ENERGY BEING DRAWN BACK SW OVER THE PNHDLS. MEANWHILE...WEAK SFC TROUGH HAS REMAINED NEARLY STATIONARY MOST OF THE DAY...MEANDERING FROM N CNTRL KS...SSWWD ACROSS THE PNHDLS AND INTO SERN NM. ABOVE FACTORS COMBINED WITH MODERATE INSTABILITY...HAVE DECIDED TO CONTINUE FIRST PERIOD FCST ALONG SAME LINES AS AFTN UPDATE...I.E. SLIGHT CHANCE/CHANCE OF EARLY EVENG SHRA AND TSRA. INCREASING SWLY DOWNSLOPE FLOW WILL COMBINE WITH MID-LVL THERMAL RIDGE OVER HIER TRRN OF NM ON TUE TO CREATE VERY WARM DAY FOR THE PNHDLS. HOWEVER... WARM TEMPS WILL BE SHORT-LIVED AS ANOTHER COLD FRONT IS EXPECTED TO REVISIT THE AREA BY LATE WED. SHORT RANGE MODELS FCST THIS SCENARIO TO VARYING DEGREES WITH THE ETA FARTHEST SOUTH FRONTAL MOVEMENT. THEREFORE...CONFIDENCE REMAINS MODERATE AT BEST REGARDING FRONT/S MOVEMENT. AT THIS TIME...BELIEVE THAT FRONT WILL PUSH SOUTH ACROSS THE OK PNHDL WED MORNG AND THE TX PNHDL WED AFTN. MEANWHILE... SHORTWAVE MOVING E ACROSS THE NERN PACIFIC WILL DIVE SE AND DEEPEN IN WAKE OF CURRENT NRN STREAM WAVE. BY EARLY THU...SAID WAVE SHOULD BE CUTOFF OVER NRN AZ. MOVEMENT OF CLOSED LOW WILL BE RATHER SLOW... PERHAPS NOT LIFTING OUT UNTIL LATE SAT. THIS MAY VERY WELL SET THE STAGE FOR THE MOST SIGNIFICANT WIDESPREAD RAINFALL THE TX/OK PNHDLS HAS EXPERIENCED IN A WHILE...PARTICULARLY IF SFC FRONT STALLS ACROSS THE FAR SRN TX PNHDL. COLD FRONT MAY LIFT BACK N AS WARM FRONT BY FRI WITH DRYLINE DEVELOPING BY MID-DAY WITH CHANCE FOR STRONG CONVECTION. CONFIDENCE DIMINISHES CONSIDERABLY DURING THE SECOND HALF FO THE EXTENDED AS LATEST MEDIUM RANGE MODELS BEGIN TO DIVERGE BY SAT. ASIDE FROM MAINTAINING PERSISTENCE INTO MON...LITTLE CHANGE IN THE FCST. .AGMA... TX...NONE. OK...NONE. JH
In the hours before
Special weather statement, Apr 30, 5:41 PM CDT, 2 hours 34 minutes before
TXZ012-017-010300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 541 PM CDT MON APR 30 2001 TXZ012-017-010300- THE NATIONAL WEATHER SERVICE IN AMARILLO HAS CLEARED THE FOLLOWING COUNTIES FROM SEVERE THUNDERSTORM WATCH 181. COUNTIES CLEARED INCLUDE: IN THE TEXAS PANHANDLE: POTTER...RANDALL... THIS INCLUDES THE CITIES OF...AMARILLO...CANYON... SCHNEIDER
Nearby
Severe Thunderstorm Warnings in Oklahoma, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.