Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 61, NWS Amarillo, TX

May 20, 2000Armstrong County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at May 20, 2000, 10:40 PM CDT for Armstrong County, Texas. It was in force for 50 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
May 20, 2000, 10:40 PM CDT (03:40 UTC)
Expired
May 20, 2000, 11:30 PM CDT
In force
50 min
Issued by
NWS Amarillo, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Armstrong County, TX

The radar

The Amarillo radar (KAMA), 52 km from the middle of the area, began a volume at 03:40 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 3.7 hours before the alert went out and 51 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.

Skew-T log-pSkew-T log-p diagram, Amarillo Airport, TX at 00:00Z on 2000-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 203 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2000-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
203 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
2824 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

244 
WUUS54 KAMA 210339
SVRAMA
TXC011-210430-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
1040 PM CDT SAT MAY 20 2000

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ARMSTRONG COUNTY IN THE TEXAS PANHANDLE

* UNTIL 1130 PM CDT

* AT 1040 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM ABOUT 15 MILES SOUTHWEST OF CLAUDE...MOVING    
  SOUTHEAST AT 20 MPH.

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL.
GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 3504 10147 3493 10164 3453 10132 3468 10109

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 May 20, 2:10 PM CDT, 8 hours 30 minutes earlier.

Area forecast discussion, May 20, 2:10 PM CDT, 8 hours 30 minutes before
TEXAS/OKLAHOMA PANHANDLES FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AMARILLO TX
210 PM CDT SAT MAY 20 2000

WIND SHIFT/COOL FRONT IS A AHEAD OF SCHEDULE...WITH NONE OF THE
MODELS HAVING A GOOD HANDLE ON ITS POSITION OR SPEED. JUDGING FROM
SATELLITE IT SHOULD MOVE INTO THE NORTHWESTERN ZONES LATE
AFTERNOON/EARLY THIS EVENING AND ACROSS THE ENTIRE CWA OVERNIGHT.
BEST LLM AND INSTABILITY WILL STILL BE IN THE EASTERN ZONES SO WILL
KEEP SEVERE STORMS MENTION THERE. HOWEVER WITH FRONT HAVING ALREADY
BECOME ACTIVE ACROSS WRN KS/SE CO AND WITH THE EARLIER TIMING...THEIR
WILL BE INCREASED INSTABILITY SO WILL INCREASE POPS ACROSS FA
TONIGHT.

THE AIR MASS BEHIND THE FRONT IS QUITE MODIFIED AND TEMPS TOMORROW
WILL NOT BE MUCH COOLER. THIS ALONG WITH A LLJ FORECASTED OVER THE
PANHANDLES COULD SUPPORT ADDITIONAL TSTMS LATE SUNDAY
AFTERNOON/EVENING MAINLY EASTERN ZONES. BY MONDAY A STRENGTHENING CAP
SHOULD KEEP MOST CONVECTION CHANCES SUPPRESSED.

IN THE EXTENDED...TUESDAY AND WEDNESDAY HIGH PRESSURE WILL BE IN
PLACE FOR WARM AND DRY CONDITIONS. THURSDAY THE MODELS ARE NOT IN
AGREEMENT AND THE MRF IS INDICATING A SYSTEM DEVELOPING AND MOVING
INTO THE WESTERN U.S. WITH A SHORT WAVE MOVING OVER THE REGION FOR
SLIGHTLY COOLER TEMPS. ATTM NOT IMPRESSED WITH MOISTURE OR DYNAMICS
SO WILL LEAVE POPS OUT.

SOME PRELIMINARY NUMBERS:
AMA 52/82 55/92 58 520
DHT 51/82 52/91 53 500

.AMA...
TX...NONE.
OK...NONE.

ND

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 8:32 PM CDTSevere Thunderstorm WarningAMALipscomb43 min
May 20, 9:21 PM CDTSevere Thunderstorm WarningAMAPotter54 min
May 20, 9:36 PM CDTSevere Thunderstorm WarningAMARandall54 min
May 20, 9:49 PM CDTSevere Thunderstorm WarningAMAArmstrong, Carson56 min

Nearby

Severe Thunderstorm Warnings in Texas, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.