Alert archive / Texas / Red Flag Warnings in 2009

Red Flag Warning 15, NWS Amarillo, TX

March 23, 200920 counties in Texas; Beaver County, Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this red flag warning at Mar 23, 2009, 4:45 AM CDT for 20 counties in Texas; Beaver County, Cimarron County, Texas County, Oklahoma. It took effect at Mar 23, 2009, 11:00 AM CDT. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 23, 2009, 4:45 AM CDT (09:45 UTC)
In effect from: Mar 23, 2009, 11:00 AM CDT
Expired: Mar 23, 2009, 9:05 PM CDT
In force: 10 hr
Issued by: NWS Amarillo, TX

All 23 counties

Beaver County, OK, Cimarron County, OK, Texas County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 66 km from the middle of the area, began a volume at 09:51 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, 9.8 hours before the alert went out and 66 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 350 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1745 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag 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 red flag warning went out at Mar 22, 11:50 PM CDT, 4 hours 55 minutes earlier.

Area forecast discussion, Mar 22, 11:50 PM CDT, 4 hours 55 minutes before

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Hazardous weather outlook, Mar 23, 12:00 AM CDT, 4 hours 45 minutes before

TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE AMARILLO TX
1200 AM CDT MON MAR 23 2009

OKZ001>003-TXZ001>020-231100-
ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH-
DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE-
OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER-
1200 AM CDT MON MAR 23 2009

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

.DAY ONE...

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ACROSS ALL OF THE OKLAHOMA
AND TEXAS PANHANDLES TONIGHT AS A STRONG UPPER LEVEL LOW PRESSURE
SYSTEM AND ITS ASSOCIATED PACIFIC COLD FRONT...MOVES ACROSS THE
AREA. EAST OF THE CAPROCK...ISOLATED STORMS THAT FORM MAY APPROACH
SEVERE STRENGTH...WITH MARGINALLY SEVERE HAIL AND STRONG GUSTY WINDS
THE PRIMARY THREATS.

IN ADDITION...CAUTION IS ADVISED ON AREA LAKES THIS AFTERNOON AND
TONIGHT DUE TO SOUTH WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS.

.DAYS TWO THROUGH SEVEN...

SOUTHWEST TO WEST WINDS OF 25 TO 35 MPH WITH HIGHER GUSTS ARE
EXPECTED ON MONDAY ACROSS THE OKLAHOMA AND TEXAS PANHANDLES...AND
A WIND ADVISORY MAY BE REQUIRED.

IN ADDITION...CRITICAL FIRE WEATHER CONDITIONS WILL BE POSSIBLE
ACROSS ALL OF THE OKLAHOMA AND TEXAS PANHANDLES ON MONDAY DUE TO THE
COMBINATION OF STRONG WINDS AND FORECAST MINIMUM RELATIVE HUMIDITIES
AT OR BELOW 15 PERCENT. THEREFORE...A FIRE WEATHER WATCH IS IN EFFECT
FOR ALL OF THE OKLAHOMA AND TEXAS PANHANDLES FROM LATE MONDAY MORNING
THROUGH EARLY MONDAY EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

NUNEZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 23, 4:58 AM CDT	Wind Advisory	AMA	Armstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 14 more	14 hr

Nearby

Red Flag Warnings in Texas, 2009 Red Flag Warnings in Oklahoma, 2009 Every red flag 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.