Alert archive / Oklahoma / Red Flag Warnings in 2009

Red Flag Warning 10, NWS Norman, OK

February 6, 20095 counties in Oklahoma

NWS Norman, OK issued this red flag warning at Feb 6, 2009, 4:29 AM CST for 5 counties in Oklahoma. It took effect at Feb 6, 2009, 12:00 PM CST. It was in force for 7 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: Feb 6, 2009, 4:29 AM CST (10:29 UTC)
In effect from: Feb 6, 2009, 12:00 PM CST
Expired: Feb 6, 2009, 7:00 PM CST
In force: 7 hr
Issued by: NWS Norman, OK

Counties Ellis County, OK, Harper County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 125 km from the middle of the area, began a volume at 10:33 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

Lamont, OK (KLMN), launched 00:00Z, 10.5 hours before the alert went out and 178 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: 2300 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 305 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 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 Feb 6, 4:16 AM CST, 13 minutes earlier.

Area forecast discussion, Feb 6, 4:16 AM CST, 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
416 AM CST FRI FEB 6 2009

.AVIATION...
LOW CLOUDS DEVELOPING OVER SOUTHEASTERN OK THIS MORNING. MAINLY SCT
LOW CLOUDS MAY WORK INTO SPS/OKC EARLY THIS MORNING BUT VEERED WINDS
JUST OFF THE SURFACE SHOULD KEEP BULK OF THE CLOUDS SOUTHEAST OF THE
AREA. STRONG SOUTH TO SOUTHWEST WINDS PERSIST THROUGH THE DAY BEFORE
DIMINISHING SLOWLY THIS EVENING. LOW CLOUDS LIKELY TO SPREAD BACK
FARTHER NORTH AND WEST TONIGHT AND WILL INDICATE MVFR CIGS ALONG A
SPS-OKC-PNC CORRIDOR LATE TONIGHT.

&&

.PREV DISCUSSION...ISSUED 416 AM CST FRI FEB 6 2009/

.DISCUSSION...ACTIVE WEATHER PATTERN EXPECTED ACROSS THE FA DURING
MUCH OF THE FORECAST PERIOD. MAIN ISSUE FOR TODAY WILL BE STRONG
WINDS AND FIRE WX. LEAD S/W EJECTING FROM THE SOUTHWESTERN U.S.
IS EXPECTED TO LIFT NORTH OF THE AREA TODAY. THIS WILL DEEPEN
SURFACE LOW OVER THE CENTRAL/NORTHERN PLAINS AND TIGHTEN PRESSURE
GRADIENT ACROSS OUR AREA. AS A RESULT WILL ISSUE WIND ADVISORY FOR
MUCH OF THE NORTHWESTERN TWO THIRDS OF THE AREA FOR TODAY. IN
ADDITIONS TO THE STRONG WINDS...WARM TEMPS ARE EXPECTED WITH HIGHS
EXPECTED TO RISE INTO THE 70S IN MOST AREAS TODAY. ALTHOUGH WARM
TEMPS AND STRONG WINDS ARE EXPECTED THIS AFTERNOON...ADVECTION OF
HIGHER DEWPOINT AIR INTO THE AREA IS EXPECTED TO KEEP RH VALUES
ABOVE RED FLAG CRITERIA. THE EXCEPTION WILL BE IN THE FAR NW WHERE
DRIER AIR IS EXPECTED TO FILTER IN THIS AFTERNOON AS WINDS VEER.
THUS WILL UPGRADE FIRE WX WATCH TO RED FLAG IN THAT AREA THIS
AFTERNOON. FRONTAL BOUNDARY EXPECTED TO STALL VICINITY OF THE KANSAS
BORDER LATE SATURDAY. WITH BOUNDARY IN THE VICINITY WILL GO WITH LOW
POPS FOR SATURDAY NIGHT NORTHERN OK AS FLOW BACKS AHEAD OF
APPROACHING UPPER TROUGH. THUNDERSTORM CHANCES INCREASE LATE SUNDAY
INTO SUNDAY NIGHT AS STRONG UPPER TROUGH EJECTS FROM THE SOUTHERN
ROCKIES. ALTHOUGH DYNAMICS WILL BE STRONG WITH THIS SYSTEM...RATHER
WEAK INSTABILITY MAY LIMIT SEVERE POTENTIAL. INITIAL BATCH OF
SHOWERS AND THUNDERSTORMS IS EXPECTED TO EXIT THE SOUTHEASTERN PART
OF THE FA EARLY MONDAY WITH A BRIEF BREAK IN THE ACTION INTO MONDAY
NIGHT BEFORE THE NEXT SYSTEM BEGINS TO IMPACT THE AREA TUESDAY. LOW
LEVEL MOISTURE WILL NOT BE PUSHES VERY FAR SOUTH WITH THE SUNDAY
SYSTEM AND WILL BE POISED TO SURGE BACK NORTHWARD IN ADVANCE OF THE
NEXT SYSTEM. WITH BETTER MOISTURE IN PLACE AND UPPER LOW TRACKING
OVER THE AREA WILL KEEP POPS HIGH TUESDAY INTO WEDNESDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  70  54  69  50 /   0   0  10  10
HOBART OK         73  50  71  50 /   0   0   0  10
WICHITA FALLS TX  75  53  73  52 /   0   0  10  10
GAGE OK           79  39  69  44 /   0   0   0  20
PONCA CITY OK     72  52  69  47 /   0   0  10  20
DURANT OK         69  55  71  55 /   0   0  10  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...WIND ADVISORY FROM 10 AM THIS MORNING TO 6 PM CST THIS
AFTERNOON      FOR OKZ004>029-033>039-044-045.

     RED FLAG WARNING FROM NOON TODAY TO 7 PM CST THIS EVENING FOR
     OKZ004-005-009-010-014.

TX...WIND ADVISORY FROM 10 AM THIS MORNING TO 6 PM CST THIS
AFTERNOON      FOR TXZ083>090.

&&

26/02

Hazardous weather outlook, Feb 5, 11:30 AM CST, 16 hours 59 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 6, 4:37 AM CST	Wind Advisory	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 29 more	13 hr

Nearby

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.