Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 138, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Jun 20, 2001, 6:04 PM CDT for Deaf Smith County, Texas. It was in force for 56 min. 2 reports 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
- Jun 20, 2001, 6:04 PM CDT (23:04 UTC)
- Expired
- Jun 20, 2001, 7:00 PM CDT
- In force
- 56 min
- Issued by
- NWS Amarillo, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Deaf Smith County, TX
The radar
The Amarillo radar (KAMA), 87 km from the middle of the area, began a volume at 23:05 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 |
|---|---|---|---|
| Jun 20, 6:23 PM CDT | Hail 0.88 | Hereford, TX | |
| Jun 20, 7:08 PM CDT | Hail 0.75 | Hereford, TX |
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
Amarillo Airport, TX (KAMA), launched 12:00Z, 11.1 hours before the alert went out and 87 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
- 37 J/kg
- Mixed-layer CIN
- -336 J/kg
- Mixed-layer LCL
- 1550 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -63 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jun 20, 3:15 PM CDT, 2 hours 49 minutes earlier.
Area forecast discussion, Jun 20, 3:15 PM CDT, 2 hours 49 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 315 PM CDT WED JUN 20 2001 FRONTAL BNDRY HAS ONCE AGAIN MOVD ACRS AMA...MOST RECENTLY AS A WMFNT. WMFNT EXTDS FM SWRN TX PNHDL TO NWRN OK. EXPC THIS BNDRY TO BCM SHARPER WITH CNVGN INCRG UPON IT DURG THE NGT AS IT MOVS FARTHER NWD TO NRN SXNS OF FCST AREA...AND THEN BGNS SURGING SWD AS A CDFNT BFR SR. CNVGNC...DEEP UPSLP COMPONENT INCRG...SFC DWPTS POOLING ON N SIDE OF FNT ALL POINT TWD GOOD OPPORTUNITY FOR TSTMS ACRS PNHDLS TNGT. UPR LVL DVGNC WL BE STRONGEST ACRS NRN ZNS AS H5 VOT MAX DROPS SEWD ACRS AREA. THICKNESS DIFFLUENCE BEING FCST INDCS ADDED POTENTIAL FOR ORGANIZED TSTMS SUPPORTED BY WAA. H8 CDFNT WL MOV SWD ACRS PNHDLS BTN 04Z AND 12Z...WITH ADDITIONAL CNVGNC ALG IT. HVY RAINS TNGT PSBL ACRS NERN ZNS IF MCS DVLPS OVR ERN CO AND MOVS SEWD. NMRS TSTMS FCST TNGT IN NERN ZNS WITH SCT TSTMS FCST ELSEWHERE. ON THU...CLDS WL LINGER OVR SRN ZNS DURG MRNG AS UPSLP FLOW PVLS. GREATEST INSTBY WL BE OVR WRN AND SRN ZNS IN AREA MOST REMOVED FM INCOMING SFC RDG BHND CDNFT. WL KEEP SLGT CHC TSTMS IN WRN ZNS THU AFTN AND EVE...AND WL REMOVE FM OTHER SXNS. SLY FLOW RESUMES ON FRI WITH WARMUP BGNG. INSTBY RETURNS AND WL RETAIN SLGT CHC TSTMS FRI AND FRI NGT. DURG EXTDD...NO MAJOR DEPARTURE FM PREVIOUS FCST. WM CONDS WITH RESIDUAL LOW-LVL MSTR WITH SLGT CHC DIURNAL TSTMS. 03 .AMA... TX...NONE. O?K...NONE. COCKRELL
In the hours before
Special weather statement, Jun 20, 1:25 PM CDT, 4 hours 39 minutes before
OKZ001>003-TXZ001>020-202100- TEXAS/OKLAHOMA PANHANDLES THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE AMARILLO TX 125 PM CDT WED JUN 20 2001 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM LATE THIS AFTERNOON THROUGH TONIGHT ACROSS ALL OF THE TEXAS AND OKLAHOMA PANHANDLES. A STATIONARY FRONT STRETCHED ACROSS THE CENTRAL TEXAS PANHANDLE THIS AFTERNOON IS EXPECTED TO LIFT NORTH AS A WARM FRONT THIS EVENING. MEANWHILE...THE AIRMASS ACROSS THE PANHANDLES IS BECOMING MODERATELY UNSTABLE DUE TO INCREASING LOW-LEVEL MOISTURE AND DAYTIME HEATING. IN ADDITION...A WEAK UPPER LEVEL DISTURBANCE WILL BE MOVING INTO THE AREA LATE TONIGHT. THE PRIMARY SEVERE WEATHER THREAT WILL BE DAMAGING WINDS AND LARGE HAIL. HEAVY RAIN AND LOCALIZED FLOODING WILL ALSO BE A THREAT GENERALLY EAST OF A LINE EXTENDING FROM GUYMON OKLAHOMA TO SHAMROCK TEXAS. AN ISOLATED TORNADO IS POSSIBLE LATE TONIGHT AS WINDS BECOME FAVORABLE FOR ROTATING STORMS. SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS ACROSS THE TEXAS AND OKLAHOMA PANHANDLES SHOULD MONITOR WEATHER DEVELOPMENTS AND REMAIN ALERT FOR POSSIBLE ACTIVATION. PLATT
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 5:09 PM CDT | Severe Thunderstorm Warning | AMA | Potter, Randall | 36 min |
| Jun 20, 5:44 PM CDT | Severe Thunderstorm Warning | AMA | Potter, Randall | 31 min |
| Jun 20, 6:15 PM CDT | Severe Thunderstorm Warning | AMA | Randall | 30 min |
| Jun 20, 6:59 PM CDT | Severe Thunderstorm Warning | AMA | Deaf Smith | 46 min |
Nearby
Severe Thunderstorm Warnings in Texas, 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; radar from the NEXRAD Level II archive.