Alert archive / Oklahoma / Red Flag Warnings in 2009

Red Flag Warning 19, NWS Norman, OK

March 23, 200913 counties in Oklahoma; Foard County, Hardeman County, Knox County, Texas

NWS Norman, OK issued this red flag warning at Mar 23, 2009, 4:44 AM CDT for 13 counties in Oklahoma; Foard County, Hardeman County, Knox County, Texas. It took effect at Mar 23, 2009, 12:00 PM CDT. It was in force for 9 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, 4:44 AM CDT (09:44 UTC)
In effect from
Mar 23, 2009, 12:00 PM CDT
Expired
Mar 23, 2009, 9:00 PM CDT
In force
9 hr
Issued by
NWS Norman, OK

Counties Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Foard County, TX, Hardeman County, TX, Knox County, TX

The radar

The Altus AFB radar (KFDR), 123 km from the middle of the area, began a volume at 09:49 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, 9.7 hours before the alert went out and 209 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 2009-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 350 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, Amarillo Airport, TX at 00:00Z on 2009-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 square meters per square second.1939587897Sfc1 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
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 Norman, OK wrote its last area forecast discussion before this red flag warning went out at Mar 23, 3:51 AM CDT, 53 minutes earlier.

Area forecast discussion, Mar 23, 3:51 AM CDT, 53 minutes before
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Hazardous weather outlook, Mar 22, 12:00 PM CDT, 16 hours 44 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1200 PM CDT SUN MAR 22 2009

OKZ004>048-050>052-TXZ083>090-231200-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1200 PM CDT SUN MAR 22 2009

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
THE CHANCE OF SEVERE THUNDERSTORMS WILL REMAIN LOW THROUGH TONIGHT.

DISCUSSION...
A FEW THUNDERSTORMS WILL BE POSSIBLE THROUGH TONIGHT AS A
DISTURBANCE MOVES ACROSS THE REGION AND THE LOW-LEVEL JET
STRENGTHENS TONIGHT. HOWEVER...WEAK INSTABILITY AND A MODERATELY
STRONG CAP WILL LIMIT THUNDERSTORM DEVELOPMENT...BUT WITH STRONG
WIND SHEAR IN PLACE...A FEW SEVERE STORMS COULD OCCUR. THE MOST
LIKELY LOCATION FOR SEVERE STORMS WILL BE WESTERN AND NORTHERN
OKLAHOMA. IF SEVERE STORMS DO OCCUR...ONE-INCH DIAMETER HAIL AND
DAMAGING WIND GUSTS WILL BE THE MAIN CONCERNS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY MAR 23.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...40 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...20 PERCENT.

OTHER HAZARDOUS WEATHER...
STRONG SOUTH WINDS WILL CONTINUE OVERNIGHT...ESPECIALLY ACROSS
WESTERN OKLAHOMA AND WESTERN NORTH TEXAS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
A STRONG STORM SYSTEM WILL MOVE INTO THE PLAINS MONDAY...ALONG WITH
A SHARPENING DRYLINE THAT WILL MOVE EAST INTO WESTERN OKLAHOMA AND
WESTERN NORTH TEXAS. THERE IS A RISK OF SEVERE THUNDERSTORMS ACROSS
OKLAHOMA AND WESTERN NORTH TEXAS LATE MONDAY THROUGH EARLY
TUESDAY...WITH THE GREATEST RISK OVER CENTRAL AND NORTH-CENTRAL
OKLAHOMA. SEVERE STORMS WILL BE POSSIBLE DUE TO THE STRONG WIND
SHEAR THAT IS EXPECTED TO DEVELOP ACROSS THE AREA. HOWEVER... THE
QUALITY OF MOISTURE AVAILABLE MAY BE SOMEWHAT LIMITED. THE MAIN
CONCERNS WILL BE LARGE HAIL AND DAMAGING WINDS. TORNADOES ALSO CAN
NOT BE RULED OUT... ESPECIALLY WITH ANY DISCRETE STORMS THAT MAY
DEVELOP. THUNDERSTORMS WILL REMAIN POSSIBLE INTO TUESDAY AS A COLD
FRONT MOVES ACROSS THE REGION. STORM SPOTTER GROUPS AND EMERGENCY
MANAGERS ARE ENCOURAGED TO LISTEN FOR FURTHER UPDATES... AND TO BE
PREPARED FOR THE POSSIBILITY OF AN ACTIVE PERIOD OF SEVERE WEATHER
LATE MONDAY.

AFTER A BRIEF BREAK WEDNESDAY... THUNDERSTORM CHANCES WILL RETURN
THURSDAY AND CONTINUE INTO EARLY THIS WEEKEND.

OTHER HAZARDOUS WEATHER...
STRONG WINDS ARE EXPECTED ON MONDAY. IN ADDITION...WEATHER
CONDITIONS WILL BE STRONGLY SUPPORTIVE FOR THE RAPID SPREAD OF ANY
WILDFIRES BEHIND THE DRYLINE MONDAY AFTERNOON AND EVENING...MAINLY
ACROSS WESTERN OKLAHOMA AND WESTERN NORTH TEXAS.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 7 AM
MONDAY.

MAXWELL

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 23, 3:23 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant37 min
Mar 23, 3:58 PM CDTSevere Thunderstorm WarningOUNGrant47 min
Mar 23, 4:31 PM CDTSevere Thunderstorm WarningOUNKay19 min
Mar 23, 5:42 PM CDTSevere Thunderstorm WarningOUNKingfisher48 min
Mar 23, 6:27 PM CDTSevere Thunderstorm WarningOUNKingfisher, Logan48 min
Mar 23, 6:40 PM CDTTornado WarningOUNLogan35 min
Mar 23, 6:47 PM CDTSevere Thunderstorm WarningOUNHarmon, Jackson43 min
Mar 23, 6:51 PM CDTSevere Thunderstorm WarningOUNComanche, Kiowa, Tillman39 min

Nearby

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