Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 199, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Sep 13, 2002, 3:30 PM CDT for Cimarron County, Oklahoma. It was in force for 30 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 13, 2002, 3:30 PM CDT (20:30 UTC)
- Expired
- Sep 13, 2002, 4:00 PM CDT
- In force
- 30 min
- Issued by
- NWS Amarillo, TX
- Area
- Counties, with a storm outline in the text
County Cimarron County, OK
The radar
The Amarillo radar (KAMA), 186 km from the middle of the area, began a volume at 20:32 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 |
|---|---|---|---|
| Sep 13, 3:46 PM CDT | Hail 1.75 | Felt, 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 8.5 hours before the alert went out and 187 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1768 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- -29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
476 WUUS54 KAMA 132030 SVRAMA OKC025-132100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AMARILLO TX 329 PM CDT FRI SEP 13 2002 THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN CIMARRON COUNTY IN OKLAHOMA * UNTIL 400 PM CDT * AT 327 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES WEST OF FELT...OR ABOUT 24 MILES WEST OF BOISE CITY...MOVING EAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FELT AT 345 PM CDT REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN AMARILLO. LAT...LON 3671 10298 3653 10299 3650 10266 3671 10265 SLATTERY
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 13, 3:25 PM CDT, 5 minutes earlier.
Area forecast discussion, Sep 13, 3:25 PM CDT, 5 minutes before
AREA FORECAST DISCUSSION...CORRECTED NATIONAL WEATHER SERVICE AMARILLO TX 235 PM CDT FRI 13 SEP 2002 LATEST ANALYSIS SHOWS SFC TROF ORGANIZING ALONG TX/NM STATE LINE IN ADVANCE OF A COLD FRONT PROGGED TO AFFECT THE AREA DURG NEXT 24 TO 36 HRS. TSTMS ALREADY DVLPG OVR HIGHER TERRAIN OF NRN NM AND SERN CO AS POTENT SHORTWAVE TRAVERSING SRN ROCKIES INTERACTS WITH MOISTURE... HEATING...AND ATTENDANT INSTABILITY. ISOLATED STORMS COULD BECOME SEVERE AND WILL RETAIN SUCH WORDING IN ZONES FOR TNGT. WILL ALSO HOLD ON TO AREAL QUALIFIERS BASED ON RADAR TRENDS. SOME SORT OF WIND SHIFT WILL OCCUR THIS EVENING AND TNGT AHEAD OF MAIN PUSH OF COOL AIR VIA A SURFACE HIGH WHICH IS SLATED TO BUILD INTO THE AREA LATE SAT AND SAT NIGHT. MAIN UPPER TROF AXIS SHOULD BE E OF FCST AREA BY LATE SATURDAY...AND WILL LEAVE POPS OUT FOR SAT NIGHT AT THIS TIME. SHORT RANGE MODELS ARE IN REASONABLE AGREEMENT THRU 72 HRS WITH SOME DIFFERENCES IN DETAILS AS IS TO BE EXPECTED WITH TIMING OF FRONTS AND COOL AIR SURGES. IT APPEARS WX DURG LATE WEEKEND INTO NEXT FRIDAY WILL BE FAIRLY QUIET. BUT THIS IS SAID WITH CAUTION. LATEST MEDIUM RANGE MODELS ARE NOT IN VERY GOOD AGREEMENT WITH UPPER AIR PATTERN DURG MIDDLE AND LATTER PART OF NEXT WEEK SO CONFIDENCE IS LOW. REFER TO PMDEPD FOR MORE DETAILS. FOR NOW...WILL MAINTAIN A DRY FCST WITH TEMPS NEAR CLIMATOLOGY...WHICH IS WHAT PREVIOUS PCKG HAD. PRELIM VALUES FOLLOW. FCSTID = 02 AMARILLO 58 76 54 74 / 50 20 00 00 BEAVER 60 76 53 74 / 60 20 00 00 BOISE CITY 54 73 50 72 / 50 20 00 00 BORGER 59 75 54 74 / 60 20 00 00 BOYS RANCH 57 75 53 75 / 50 20 00 00 CANYON 58 75 54 74 / 50 20 00 00 CLARENDON 64 77 57 76 / 50 20 00 00 DALHART 56 74 52 73 / 50 20 00 00 GUYMON 59 75 53 73 / 60 20 00 00 HEREFORD 57 75 54 74 / 50 20 00 00 LIPSCOMB 60 76 54 74 / 60 20 00 00 SHAMROCK 64 78 59 76 / 50 20 00 00 WELLINGTON 64 78 59 76 / 50 20 00 00 .AMA... TX...NONE. OK...NONE. ANDRADE
In the hours before
Special weather statement, Sep 13, 1:00 PM CDT, 2 hours 30 minutes before
OKZ001>003-TXZ001>020-132200- TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AMARILLO TX 100 PM CDT FRI SEP 13 2002 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE ENTIRE TEXAS AND OKLAHOMA PANHANDLES LATER THIS AFTERNOON AND TONIGHT. THIS AFTERNOON...A SURFACE LOW PRESSURE CENTER IS LOCATED OVER SOUTHWEST KANSAS BETWEEN GARDEN CITY AND LIBERAL. A PACIFIC COOL FRONT EXTENDS SOUTH OF THE LOW TO NEAR CLAUDE TEXAS. A MUCH STRONGER COOL FRONT IS EXPECTED TO MOVE ACROSS THE PANHANDLES ON SATURDAY. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP IN THE MOIST AND UNSTABLE CONDITIONS OVER THE PANHANDLES THIS AFTERNOON AND TONIGHT. THE NORTHERN AND EASTERN PANHANDLES APPEAR TO HAVE THE BEST CHANCE FOR STORMS. STORMS INITIALLY WILL MOVE TOWARDS THE EAST BUT LATER TONIGHT STORMS WILL MOVE IN A SOUTHEASTLY DIRECTION. THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL AND DAMAGING DOWNBURST WINDS. LOCALLY HEAVY RAINFALL AND DANGEROUS LIGHTNING IS ALSO EXPECTED. SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD REMAIN ALERT AND BE READY FOR POSSIBLE ACTIVATION LATER THIS AFTERNOON AND TONIGHT. SLATTERY
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 4:42 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron | 48 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2002Every severe thunderstorm warning in 2002
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.