Alert archive / Oklahoma / Ice Storm Warnings in 2007

Ice Storm Warning 2, NWS Norman, OK

December 9, 200748 counties in Oklahoma; 8 counties in Texas

NWS Norman, OK issued this ice storm warning at Dec 9, 2007, 3:49 AM CST for 48 counties in Oklahoma; 8 counties in Texas. It was in force for 56 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
Dec 9, 2007, 3:49 AM CST (09:49 UTC)
Expired
Dec 11, 2007, 12:00 PM CST
In force
56 hr
Issued by
NWS Norman, OK
All 56 counties

Alfalfa County, OK, Atoka County, OK, Beckham County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 81 km from the middle of the area, began a volume at 09:52 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, 9.8 hours before the alert went out and 179 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, Lamont, OK at 00:00Z on 2007-12-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLEL10008507005003002001001 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, Lamont, OK at 00:00Z on 2007-12-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 223 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
10 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
414 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
223 m²/s²
0-3 km storm-relative helicity
367 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 ice storm 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 ice storm warning went out at Dec 8, 8:45 PM CST, 7 hours 4 minutes earlier.

Area forecast discussion, Dec 8, 8:45 PM CST, 7 hours 4 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
845 PM CST SAT DEC 8 2007

.DISCUSSION...
DRY-BULB TEMPERATURES HAVE BEEN FALLING FASTER THAN EXPECTED WHICH
TAKES THE SURFACE FREEZING LINE FARTHER SOUTH. LIGHT RAIN HAS
RECENTLY BEEN REPORTED AT KWPA AND RADAR INDICATES NARROW LINES
AND SMALL AREAS OF LIGHT RAIN/DRIZZLE IN NORTH CENTRAL AND CENTRAL
OKLHAOMA. ACROSS SOUTHEAST OKLAHOMA SHOWERS HAVE FORMED AND WILL
LIKELY INCREASE IN NUMBER INTO THE NIGHT WITH THE MORE FAVORABLE
THERMODYNAMIC PROFILE ABOVE THE SURFACE LAYER. MORE THAN A GLAZING
WILL OCCUR WHERE THE FREEZING LINE INTRUDES INTO THE AREA OF
DEVELOPING SHOWERS LATER TONIGHT. THE GREATEST COLD ADVECTION AT
THE SURFACE HAS BEEN OCCURING NORTH OF I-44 THROUGH THE EVENING,
SO SOUTH CENTRAL OKLAHOMA STILL APPEARS TO BE OUT OF THE THREAT OF
FREEZING RAIN/DRIZZLE TONIGHT, BUT THIS WILL BE MONITORED CLOSELY.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  30  33  29  32 /  80  60  40  70
HOBART OK         28  32  27  31 /  70  50  40  70
WICHITA FALLS TX  33  36  31  34 /  70  60  60  70
GAGE OK           22  28  23  29 /  70  40  10  70
PONCA CITY OK     26  30  25  32 /  80  60  10  70
DURANT OK         41  41  34  42 /  70  80  70  70

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...FREEZING RAIN ADVISORY UNTIL 6 AM CST SUNDAY FOR OKZ004>031-
     033>040-044.

     WINTER STORM WATCH FROM 6 AM CST SUNDAY THROUGH LATE MONDAY
     NIGHT FOR OKZ004>047-050-051.

TX...FREEZING RAIN ADVISORY UNTIL 6 AM CST SUNDAY FOR TXZ083>088.

     WINTER STORM WATCH FROM 6 AM CST SUNDAY THROUGH LATE MONDAY
     NIGHT FOR TXZ083>090.

&&

99/99
Hazardous weather outlook, Dec 8, 7:55 PM CST, 7 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
755 PM CST SAT DEC 8 2007

OKZ004>048-050>052-TXZ083>090-091200-
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-
755 PM CST SAT DEC 8 2007

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

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS THE SOUTHEAST HALF OF
OKLAHOMA AND WESTERN NORTH TEXAS.

DISCUSSION...
WARM AIR ABOVE THE COLD SURFACE LAYER WILL EXPERIENCE INCREASING
LIFT WITH THE INFLUENCE OF THE UPPER STORM WAVE APPROACHING FROM THE
SOUTHWEST. THE INCREASED LAPSE RATES MAY RESULT IN STRONG
THUNDERSTORMS CAPABLE OF PRODUCING HAIL BELOW SEVERE SIZE.

THUNDERSTORM PROBABILITY TABLE...
VALID THROUGH 700 AM CST SUNDAY DEC 9.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...60 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR... 5 PERCENT.

OTHER HAZARDOUS WEATHER...
LIGHT FREEZING DRIZZLE AND LIGHT FREEZING RAIN WILL FURTHER DEVELOP
TONIGHT ALONG AND NORTH OF INTERSTATE 44...WHERE A FREEZING
RAIN ADVISORY IS IN EFFECT.

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

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT CHANCE OF NON-SEVERE THUNDERSTORMS SUNDAY MORNING
ACROSS FAR SOUTHEAST OKLAHOMA.

OTHER HAZARDOUS WEATHER...
LIGHT FREEZING RAIN MAY BE ONGOING EARLY SUNDAY MAINLY NEAR AND JUST
SOUTH OF INTERSTATE 44 BEFORE ENDING BY MID-MORNING. FREEZING RAIN IS
EXPECTED TO REDEVELOP ACROSS THE RED RIVER VALLEY SUNDAY NIGHT
BEFORE EXPANDING NORTH AND INCREASING MONDAY AND MONDAY NIGHT.
SIGNIFICANT ACCUMULATIONS OF ICE ARE LIKELY.

ICE STORM PROBABILITY TABLE...
VALID THROUGH 700 AM CST TUESDAY DEC 11.
PROBABILITY OF ICE OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF ICE TOTALS EXCEEDING 1/4 INCH...80 PERCENT.
PROBABILITY OF ICE TOTALS EXCEEDING 1/2 INCH...60 PERCENT.

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

JAMES/WR

In the hours before

Special weather statement, Dec 8, 11:12 PM CST, 4 hours 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1112 PM CST SAT DEC 8 2007

OKZ024>030-038>040-090615-
LINCOLN OK-CANADIAN OK-OKLAHOMA OK-POTTAWATOMIE OK-CLEVELAND OK-
GRADY OK-MCCLAIN OK-COMANCHE OK-GARVIN OK-STEPHENS OK-
1112 PM CST SAT DEC 8 2007

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR CANADIAN...CLEVELAND...
COMANCHE...GARVIN...GRADY...LINCOLN...MCCLAIN...OKLAHOMA...
POTTAWATOMIE AND STEPHENS COUNTIES.

SHOWERS OF MODERATE RAIN AND FREEZING RAIN HAD INCREASED FROM
SOUTHWEST INTO CENTRAL OKLAHOMA. WARM AND WEAKLY UNSTABLE AIR ALOFT
WILL CONTRIBUTE TO NUMEROUS SHOWERS...AND OCCASIONAL THUNDER FROM
LAWTON TO CHICKASHA...AND OVER MUCH OF THE OKLAHOMA CITY METRO AREA.

SURFACE TEMPERATURES WERE VERY NEAR OR JUST BELOW FREEZING IN THIS
AREA...LEADING TO INCREASED POTENTIAL FOR ICE ACCUMULATION ON
EXPOSED SURFACES...INCLUDING ROADS AND BRIDGES. MOST OF THE ICE WILL
FORM DURING BRIEF PERIODS OF MODERATE FREEZING RAIN. STRONGER
THUNDERSTORMS WILL ALSO PRODUCE SMALL HAIL.

BURKE
Special weather statement, Dec 9, 12:32 AM CST, 3 hours 17 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>
Special weather statement, Dec 9, 12:41 AM CST, 3 hours 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1241 AM CST SUN DEC 9 2007

OKZ025>030-090745-
LINCOLN OK-OKLAHOMA OK-POTTAWATOMIE OK-CLEVELAND OK-GRADY OK-
MCCLAIN OK-
1241 AM CST SUN DEC 9 2007

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR CLEVELAND...GRADY...
LINCOLN...MCCLAIN...OKLAHOMA AND POTTAWATOMIE COUNTIES.

A LINE OF THUNDERSTORMS WILL PRODUCE MODERATE FREEZING RAIN IN
CENTRAL OKLAHOMA THROUGH 2 AM. THE HEAVIEST ICING WILL OCCUR FROM
BRIDGE CREEK THROUGH THE SOUTHERN AND EASTERN HALF OF OKLAHOMA
CITY...AND ON INTO LINCOLN COUNTY. ROADS...AND PARTICULARLY
BRIDGES...WILL BECOME SLICK AND HAZARDOUS. ICE WILL ALSO ACCUMULATE
ON ANY EXPOSED SURFACES...INCLUDING SOME TREES AND POWER LINES.

OTHER SCATTERED DOWNPOURS OF FREEZING RAIN WILL OCCUR FARTHER SOUTH
TOWARD SHAWNEE AND NORMAN. ALTHOUGH NOT AS WIDESPREAD...THESE AREAS
WILL SEE SLICK SPOTS...AND MINOR ICE ACCUMULATIONS.

BURKE

Nearby

Ice Storm Warnings in Oklahoma, 2007Ice Storm Warnings in Texas, 2007Every ice storm warning in 2007

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.