Alert archive / Oklahoma / Wind Advisories in 2009

Wind Advisory 17, NWS Norman, OK

April 5, 200930 counties in Oklahoma

NWS Norman, OK issued this wind advisory at Apr 5, 2009, 3:50 AM CDT for 30 counties in Oklahoma. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Apr 5, 2009, 3:50 AM CDT (08:50 UTC)
Expired: Apr 5, 2009, 8:00 PM CDT
In force: 16 hr
Issued by: NWS Norman, OK

All 30 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harper County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pottawatomie County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 105 km from the middle of the area, began a volume at 08:54 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

Norman, OK (KOUN), launched 00:00Z, 8.8 hours before the alert went out and 104 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 4273 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 152 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 wind advisory 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 wind advisory went out at Apr 5, 3:30 AM CDT, 20 minutes earlier.

Area forecast discussion, Apr 5, 3:30 AM CDT, 20 minutes before

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Hazardous weather outlook, Apr 4, 11:44 PM CDT, 4 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
1144 PM CDT SAT APR 4 2009

OKZ004>048-050>052-TXZ083>090-051200-
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-
1144 PM CDT SAT APR 4 2009

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

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS ARE EXPECTED ALONG A DRYLINE TONIGHT FROM SOUTH
CENTRAL INTO EAST CENTRAL OKLAHOMA.

DISCUSSION...
LIMITED MOISTURE HAS RETURNED EAST OF A DRYLINE LOCATED FROM
SEMINOLE TO ARDMORE. A DRYLINE WILL PROVIDE ENOUGH LIFT TO MAINTAIN
THUNDERSTORMS FOR A FEW HOURS TONIGHT. ANY THUNDERSTORMS WOULD OCCUR
NEAR AND EAST OF A LINE FROM SEMINOLE...ADA...AND ARDMORE. SMALL
HAIL AND STRONG WIND GUSTS WOULD BE THE MAIN IMPACTS...THOUGH AN
ISOLATED SEVERE STORM CANNOT BE RULED OUT.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY APR 5.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...80 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...30 PERCENT.

OTHER HAZARDOUS WEATHER...
STRONG NORTHWEST WINDS WILL OCCUR BEHIND A COLD FRONT AS IT MOVES
ACROSS OKLAHOMA AND NORTH TEXAS OVER THE NEXT SEVERAL HOURS. PERSONS
INVOLVED IN WILDFIRE CONTAINMENT EFFORTS SHOULD STAY INFORMED
REGARDING THE TIMING OF THE WIND SHIFT AT THEIR PARTICULAR LOCATION.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS ACROSS PORTIONS OF OKLAHOMA
AGAIN LATE NEXT WEEK AS A STORM SYSTEM MOVES ACROSS THE REGION.

OTHER HAZARDOUS WEATHER...
COLD WEATHER AND BREEZY CONDITIONS COULD LEAD TO WIND CHILLS IN THE
TEENS ACROSS MUCH OF OKLAHOMA SUNDAY NIGHT INTO MONDAY MORNING...
WITH WIND CHILL VALUES IN THE 20S ACROSS THE REST OF THE AREA. THE
COLD TEMPERATURES WILL CONTINUE MONDAY AND TUESDAY...BRINGING A
LATE-SEASON FREEZE TO MUCH OF OKLAHOMA AND POSSIBLY WESTERN NORTH
TEXAS. PORTIONS OF NORTHERN... WESTERN... AND CENTRAL OKLAHOMA COULD
EXPERIENCE A HARD FREEZE BOTH MONDAY AND TUESDAY MORNING.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AROUND 7
AM SUNDAY.

In the hours before

Local storm report, Apr 5, 12:13 AM CDT, 3 hours 37 minutes before

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Local storm report, Apr 5, 12:17 AM CDT, 3 hours 33 minutes before

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Special weather statement, Apr 5, 12:23 AM CDT, 3 hours 27 minutes before

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Special weather statement, Apr 5, 12:47 AM CDT, 3 hours 3 minutes before

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Special weather statement, Apr 5, 1:29 AM CDT, 2 hours 21 minutes before

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Special weather statement, Apr 5, 1:43 AM CDT, 2 hours 7 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 11:56 PM CDT	Severe Thunderstorm Warning	OUN	Johnston	38 min
Apr 5, 12:00 AM CDT	Severe Thunderstorm Warning	OUN	Hughes	45 min
Apr 5, 12:20 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Johnston	25 min
Apr 5, 12:44 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	31 min
Apr 5, 12:55 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Johnston	50 min
Apr 5, 3:50 AM CDT	Freeze Warning	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 25 more	29 hr
Apr 5, 3:50 AM CDT	Freeze Warning	OUN	Alfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more	30 hr

Nearby

Wind Advisories in Oklahoma, 2009 Every wind advisory 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.