Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 179, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Sep 17, 2001, 9:23 PM CDT for Beaver County, Texas County, Oklahoma. It was in force for 97 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 17, 2001, 9:23 PM CDT (02:23 UTC)
- Expired
- Sep 17, 2001, 11:00 PM CDT
- In force
- 97 min
- Issued by
- NWS Amarillo, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Beaver County, OK, Texas County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 17, 9:43 PM CDT | Hail 0.75 | Hardesty, 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, 2.4 hours before the alert went out and 149 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
- 732 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1890 m above ground
- 0-6 km bulk shear
- 106 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
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.
NWS Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 17, 4:45 PM CDT, 4 hours 38 minutes earlier.
Area forecast discussion, Sep 17, 4:45 PM CDT, 4 hours 38 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 445 PM CDT MON SEP 17 2001 MODERATELY STRONG SHORTWAVE BEGINNING TO MOVE ACROSS THE CENTRAL ROCKIES THIS AFTERNOON PER LATEST WV/IR IMAGERY. AT THE SURFACE... STATIONARY FRONT WAS STRETCHED FROM NORTHERN KANSAS WESTWARD INTO EAST CENTRAL COLORADO...WITH MESO-LOW LOCATED IN SOUTHWESTERN KANSAS. CONVECTION INCREASING ALONG AND TO THE NORTH OF STATIONARY FRONT AS WELL AS THE HIGHER TERRAIN ALONG THE EASTERN SLOPES OF COLORADO AND NORTHEASTERN NEW MEXICO. EXPECT STATIONARY FRONT TO BEGIN MOVING SOUTH...PARTIALLY MASKED BY CONVECTIVE OUTFLOW...LATE THIS AFTERNOON...ENTERING THE OKLAHOMA PANHANDLE DURING THE EARLY EVENING. SHORT RANGE MODELS...AVN AND MORE SO NGM...APPEAR TOO SLOW AND TOO FAR NORTH WITH THE FRONT. ETA SEEMS A BIT MORE REALISTIC... HOWEVER...THIS IS BECAUSE IT MAY BE TOO FAST WITH THE SHORTWAVE. THEREFORE...MUCH OF PACKAGE IS BASED UPON A MESHING OF THE AVN/S MID AND UPPER LEVEL FEATURES...AND THE ETA/S LOW-LEVEL FEATURES. STEEP LAPSE RATES...STRONG DAYTIME INSOLATION...AND INCREASING SPEED/DIRECTIONAL SHEAR HAS CREATED VERY FAVORABLE CONDITIONS FOR SEVERE TSRA...WITH MAIN THREAT BEING LARGE HAIL AND DAMAGING DOWNBURST WINDS. EARLY ISOLATED CELLS MIGHT PRODUCE A TORNADO...BUT AS THE EVENING PROGRESSES...CONVECTION LIKELY TO MERGE INTO LARGE CLUSTERS...EVENTUALLY EVOLVING INTO MCS. THIS WILL CREATE CONDITIONS FAVORABLE FOR LOCALLY HEAVY RAINFALL AND WILL BE MENTIONED IN A UPCOMING UPDATE TO FORECAST. SFC FRONT WILL SHIFT EAST TONIGHT AND ALLOW COLD FRONT TO PUSH SOUTH ACROSS THE REMAINDER OF THE CWFA. COOLER TEMPS FOR TUESDAY AND TUESDAY NIGHT DUE TO /SLIGHTLY/ DRIER AIRMASS AND WEAK UPSLOPE LOW-LEVEL FLOW. DESPITE DIMINISHING SYNOPTIC SCALE LIFT FROM EXITING SHORTWAVE...WILL RETAIN CHANCE POPS FOR TUESDAY AND TUESDAY NIGHT AS AFTERNOON CONVECTIVE SNACKS SEEM TO SOMEHOW EMERGE ACROSS THE HIGHER TERRAIN UNDER WEST TO NORTHWEST FLOW ALOFT AND UPSLOPE FLOW NEAR THE SURFACE. PRECIPITATION CHANCES LOOK TO WANE THROUGH THURSDAY WITH NORTHWEST FLOW ALOFT WEAKENING AND LOW LEVEL FOCUSING MECHANISMS APPARENTLY ABSENT. WEAK SHORTWAVE MAY PASS TO THE NORTH OF THE AREA FRIDAY AND FRIDAY NIGHT...PULLING ANOTHER FRONT SOUTH ACROSS THE AREA...SO DECIDED TO RETAIN LOW POPS THEN. LOW CONFIDENCE FOR PRECIPITATION POTENTIAL SUNDAY AND MONDAY AS MEDIUM RANGE MODELS ARE TRENDING TOWARD UPPER LEVEL RIDGING. THEREFORE...WILL KEEP DRY AND WARM FOR NOW. .AMA... TX...NONE. OK...NONE. JH
In the hours before
Local storm report, Sep 17, 7:30 PM CDT, 1 hour 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
730 PM CDT MON SEP 17 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0440 PM 14 SW BOISE CITY OK 1.50 INCH HAIL
09/17/01 CIMARRON REPORTED BY NWS SPOTTER.
TASLocal storm report, Sep 17, 8:47 PM CDT, 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
730 PM CDT MON SEP 17 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0440 PM 14 SW BOISE CITY OK 1.50 INCH HAIL
09/17/01 CIMARRON REPORTED BY NWS SPOTTER.
0829 PM TEXHOMA OK 0.88 INCH HAIL
09/17/01 TEXAS REPORTED BY F.D.
TAS
@ RUKWBCe /KDENNWUS54 KAMA 180147
LSRAMA
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
847 PM CDT MON SEP 17 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0440 PM 14 SW BOISE CITY OK 1.50 INCH HAIL
09/17/01 CIMARRON REPORTED BY NWS SPOTTER.
0829 PM TEXHOMA OK 0.88 INCH HAIL
09/17/01 TEXAS REPORTED BY F.D.
TASThe office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 10:03 PM CDT | Severe Thunderstorm Warning | AMA | Ochiltree | 87 min |
| Sep 17, 8:00 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 90 min |
| Sep 17, 9:30 PM CDT | Flash Flood Warning | AMA | Beaver, Texas | 4 hr |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.