Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 285, NWS Amarillo, TX

September 3, 2009Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Sep 3, 2009, 6:16 PM CDT for Cimarron County, Texas County, Oklahoma. It was in force for 89 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 3, 2009, 6:16 PM CDT (23:16 UTC)
Expired
Sep 3, 2009, 7:45 PM CDT
In force
89 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon

Counties Cimarron County, OK, Texas County, OK

The radar

The Amarillo radar (KAMA), 170 km from the middle of the area, began a volume at 23:18 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 12:00Z, 11.3 hours before the alert went out and 218 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, Dodge City, at 12:00Z on 2009-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 joules per kilogram.LCLLFCEL10008507005003002001001 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, Dodge City, at 12:00Z on 2009-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.193958Sfc1 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
46 J/kg
Mixed-layer CIN
-414 J/kg
Mixed-layer LCL
769 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 3, 5:18 PM CDT, 58 minutes earlier.

Area forecast discussion, Sep 3, 5:18 PM CDT, 58 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AMARILLO TX
518 PM CDT THU SEP 3 2009

.AVIATION...
SHOWERS AND THUNDERSTORMS LOOK TO BE A PRETTY GOOD BET ACROSS THE TAF
SITES TONIGHT. MCS OVER SOUTHEAST COLORADO DROPPING SOUTHWARD IS BEING
AIDED BY AN UPPER LEVEL TROUGH AND SURFACE CONFLUENCE ALONG A COLD
FRONT. WILL END THE SHOWERS AND STORMS FROM NORTH TO SOUTH THROUGH
THE EARLY MORNING HOURS. SOME OF THE STORMS MAY GET STRONG TONIGHT
WITH HAIL...STRONG WINDS AND VERY HEAVY RAIN. WINDS WILL BE VARIABLE
AS THIS COMPLEX OF STORMS MOVES THROUGH THE AREA...BUT WINDS SHOULD
END UP NORTHEAST OR EAST BY MID DAY FRIDAY. SKIES WILL REMAIN VFR
OUTSIDE OF THUNDERSTORMS.

&&

.PREV DISCUSSION... /ISSUED 352 PM CDT THU SEP 3 2009/

DISCUSSION...
LATEST CROP OF SHOWERS AND TSTMS FORMING IN PARTS OF THE FCST AREA
AND HIGHER TERRAIN OF NERN NM AND SERN CO. WENT WITH SCT AREAL QUALIFIERS
TONIGHT ALL SECTIONS BASED ON CURRENT TRENDS.

OTHERWISE...LINGERING FRONTAL BOUNDARY ALONG WITH FAVORABLE UPPER
LEVEL FLOW PATTERN FEATURING NW FLOW TRANSITIONING TO SW FLOW EARLY
NEXT WEEK PLUS SUFFICIENT MOISTURE SUGGESTS RETAINING AT LEAST SLGT
CHC POPS NEARLY EVERY PERIOD OF THIS PCKG AFTER TONIGHT. BOTH 12Z GFS
AND 12Z ECMWF CONTINUE TO BRING ANOTHER COLD FRONT THRU THE FCST AREA
SOMETIME WED OR WED EVENING...JUSTIFYING POPS DURG THIS TIME FRAME.
LEFT NEXT THURSDAY DRY FOR NOW BUT MEDIUM RANGE MODELS MAINTAIN THE
GENERAL WET PATTERN ON THAT DAY AS WELL. OVERALL...MAINTAINED
INTEGRITY OF PREVIOUS PCKG WITH ONLY MINOR ADJUSTMENTS MADE AT BEST.

ANDRADE

FIRE WEATHER...
NO MAJOR FIRE WEATHER CONCERNS ANTICIPATED NEXT SEVERAL DAYS.

ANDRADE

&&

.AMA WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
OK...NONE.

&&

15/05
Hazardous weather outlook, Sep 3, 2:59 PM CDT, 3 hours 17 minutes before
TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
259 PM CDT THU SEP 3 2009

OKZ001>003-TXZ001>020-041100-
ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH-
DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE-
OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER-
259 PM CDT THU SEP 3 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA
PANHANDLES.

.DAY ONE...

THUNDERSTORMS WILL BE POSSIBLE THROUGH TONIGHT ACROSS THE OKLAHOMA
AND TEXAS PANHANDLES. SOME THUNDERSTORMS MAY BECOME STRONG TO
MARGINALLY SEVERE...WITH LARGE HAIL AND DAMAGING WINDS THE MAIN
THREATS. VERY HEAVY RAINFALL MAY ALSO LEAD TO LOCALIZED FLOODING OR
FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...

THERE IS A SLIGHT CHANCE TO CHANCE OF THUNDERSTORMS ACROSS ALL OF
THE OKLAHOMA AND TEXAS PANHANDLES FRIDAY AFTERNOON THROUGH WEDNESDAY
NIGHT. SOME OF THE STORMS THAT FORM MAY BECOME MARGINALLY SEVERE...
WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREATS. IN
ADDITION...HEAVY RAIN WILL BE POSSIBLE...WHICH MAY RESULT IN
LOCALIZED FLOODING OR FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

BROST

In the hours before

Special weather statement, Sep 3, 4:33 PM CDT, 1 hour 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
433 PM CDT THU SEP 3 2009

TXZ006-011-032200-
HARTLEY TX-OLDHAM TX-
433 PM CDT THU SEP 3 2009

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY EFFECTIVE UNTIL 500 PM CDT FOR OLDHAM AND HARTLEY
COUNTIES.

AT 431 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 13 MILES WEST OF CHANNING...MOVING SOUTH AT 5
MPH.

UP TO ONE HALF INCH SIZE HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.

HEAVY RAINFALL MAY RESULT IN LOCALIZED FLOODING OF LOW LYING AND POOR
DRAINAGE AREAS. AVOID NORMAL FLOOD-PRONE AREAS AND DO NOT CROSS
FLOODED ROADS AS THEY MAY BE WASHED OUT.

LG
Special weather statement, Sep 3, 5:51 PM CDT, 25 minutes before
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Nearby

Severe Thunderstorm Warnings in Oklahoma, 2009Every severe thunderstorm warning in 2009

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.