Alert archive / Texas / Red Flag Warnings in 2010

Red Flag Warning 21, NWS Norman, OK

December 20, 20108 counties in Texas; 5 counties in Oklahoma

NWS Norman, OK issued this red flag warning at Dec 20, 2010, 4:32 AM CST for 8 counties in Texas; 5 counties in Oklahoma. It took effect at Dec 20, 2010, 11:00 AM 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
Dec 20, 2010, 4:32 AM CST (10:32 UTC)
In effect from
Dec 20, 2010, 11:00 AM CST
Expired
Dec 20, 2010, 6:00 PM CST
In force
7 hr
Issued by
NWS Norman, OK

Counties Cotton County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Tillman 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 Altus AFB radar (KFDR), 32 km from the middle of the area, began a volume at 10:38 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, 10.5 hours before the alert went out and 197 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, Norman, OK at 00:00Z on 2010-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2010-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 193 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1705 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
193 m²/s²
0-3 km storm-relative helicity
302 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

429 
WWUS84 KOUN 201032
RFWOUN

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORMAN OK
432 AM CST MON DEC 20 2010

.WINDY...DRY...AND VERY WARM CONDITIONS ARE FORECAST THIS
AFTERNOON...WHICH WILL LEAD TO EXTREME WILDFIRE DANGERS ACROSS
WESTERN NORTH TEXAS AND PORTIONS OF SOUTHWEST OKLAHOMA.

OKZ044-TXZ090-201145-
/O.CAN.KOUN.FW.A.0018.101220T1700Z-101221T0000Z/
COTTON-CLAY-
432 AM CST MON DEC 20 2010

...FIRE WEATHER WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN NORMAN HAS CANCELLED THE FIRE
WEATHER WATCH. 

WILDFIRE DANGERS WILL BE ELEVATED...BUT RED FLAG WARNING LEVELS
ARE NOT FORECAST.

$$

OKZ033-036-037-TXZ083>089-201845-
/O.UPG.KOUN.FW.A.0018.101220T1700Z-101221T0000Z/
/O.NEW.KOUN.FW.W.0021.101220T1700Z-101221T0000Z/
HARMON-JACKSON-TILLMAN-HARDEMAN-FOARD-WILBARGER-WICHITA-KNOX-
BAYLOR-ARCHER-
432 AM CST MON DEC 20 2010

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 6 PM CST
THIS EVENING...

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 6 PM CST
THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. 

AFTERNOON TEMPERATURES ARE FORECAST TO BE IN THE MID 70S TO LOWER
80S...WITH WEST TO SOUTHWEST WINDS REACHING SUSTAINED SPEEDS OF 20
TO 25 MPH. GUSTS OF 30 MPH ARE ALSO EXPECTED. THE WESTERLY WINDS
WILL BRING DRIER AIR OVER WESTERN NORTH TEXAS AND SOUTHWEST
OKLAHOMA...WHICH WILL LOWER AFTERNOON HUMIDITY VALUES TO BETWEEN
15 AND 20 PERCENT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE
TO YOUR LOCAL FIRE DEPARTMENT.

&&

$$
1 follow-up statement
517 
WWUS84 KOUN 201941
RFWOUN

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORMAN OK
141 PM CST MON DEC 20 2010

.WINDY...DRY...AND VERY WARM CONDITIONS WILL CONTINUE THIS
AFTERNOON... WHICH WILL LEAD TO EXTREME WILDFIRE DANGERS ACROSS
WESTERN NORTH TEXAS AND PORTIONS OF SOUTHWEST OKLAHOMA.

OKZ044-045-TXZ090-210000-
/O.EXA.KOUN.FW.W.0021.000000T0000Z-101221T0000Z/
COTTON-JEFFERSON-CLAY-
141 PM CST MON DEC 20 2010

...RED FLAG WARNING IN EFFECT UNTIL 6 PM CST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT UNTIL 6 PM CST THIS EVENING. 

AFTERNOON TEMPERATURES IN THE MID 70S TO NEAR 80 WITH SOUTHWEST
WINDS REACHING SUSTAINED SPEEDS OF 20 TO 25 MPH WILL OCCUR OVER
THE REGION. GUSTS OF 30 MPH ARE ALSO EXPECTED ALONG WITH AFTERNOON
HUMIDITY VALUES TO BETWEEN 15 AND 20 PERCENT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE
TO YOUR LOCAL FIRE DEPARTMENT.

&&

$$

OKZ033-036-037-TXZ083>089-210000-
/O.CON.KOUN.FW.W.0021.000000T0000Z-101221T0000Z/
HARMON-JACKSON-TILLMAN-HARDEMAN-FOARD-WILBARGER-WICHITA-KNOX-
BAYLOR-ARCHER-
141 PM CST MON DEC 20 2010

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS
EVENING...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING.

AFTERNOON TEMPERATURES IN THE MID 70S TO LOWER 80S AND WEST TO SOUTHWEST
WINDS REACHING SUSTAINED SPEEDS OF 20 TO 25 MPH WILL OCCUR OVER
THE REGION. GUSTS OF 30 MPH ARE ALSO EXPECTED ALONG WITH AFTERNOON
HUMIDITY VALUES TO BETWEEN 15 AND 20 PERCENT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE
TO YOUR LOCAL FIRE DEPARTMENT.

&&

$$

Nearby

Red Flag Warnings in Texas, 2010Red Flag Warnings in Oklahoma, 2010Every red flag warning in 2010

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.