Alert archive / Oklahoma / Red Flag Warnings in 2011
Red Flag Warning 2, NWS Norman, OK
NWS Norman, OK issued this red flag warning at Feb 19, 2011, 3:04 PM CST for 24 counties in Oklahoma; 6 counties in Texas. It took effect at Feb 20, 2011, 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
- Feb 19, 2011, 3:04 PM CST (21:04 UTC)
- In effect from
- Feb 20, 2011, 11:00 AM CST
- Expired
- Feb 20, 2011, 6:00 PM CST
- In force
- 7 hr
- Issued by
- NWS Norman, OK
All 30 counties
Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Baylor County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 104 km from the middle of the area, began a volume at 21:07 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 12:00Z, 9.1 hours before the alert went out and 143 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.
- Mixed-layer CAPE
- 157 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 616 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
294 WWUS84 KOUN 192104 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 304 PM CST SAT FEB 19 2011 OKZ004-005-009-010-014-021-033-034-036-TXZ083-084-087-200515- /O.UPG.KOUN.FW.A.0002.110220T1700Z-110221T0100Z/ /O.NEW.KOUN.FW.W.0002.110220T1700Z-110221T0100Z/ HARPER-WOODS-ELLIS-WOODWARD-ROGER MILLS-BECKHAM-HARMON-GREER- JACKSON-HARDEMAN-FOARD-KNOX- 304 PM CST SAT FEB 19 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 7 PM CST SUNDAY... THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 11 AM TO 7 PM CST SUNDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...VERY WARM AIR...AND STRONG WESTERLY WIND INTO FAR WESTERN OKLAHOMA AND ADJACENT PORTIONS OF NORTH TEXAS BY LATE SUNDAY MORNING. SUSTAINED WIND SPEEDS 20 TO 25 MPH AND SOME GUSTS OF 30 TO 40 MPH WILL BE POSSIBLE. MINIMUM RELATIVE HUMIDITIES OF 10 TO 20 PERCENT ARE LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. && $$ OKZ007-017-023-038-200515- /O.EXA.KOUN.FW.A.0002.110220T1700Z-110221T0100Z/ GRANT-BLAINE-CADDO-COMANCHE- 304 PM CST SAT FEB 19 2011 ...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A FIRE WEATHER WATCH...WHICH IS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...VERY WARM AIR...AND STRONG WESTERLY WIND INTO FAR WESTERN OKLAHOMA AND ADJACENT PORTIONS OF NORTH TEXAS BY LATE SUNDAY MORNING. IF THE DRIER AIR AND STRONGER WIND LOOKS LIKE IT WILL SPREAD FARTHER EAST...THIS WATCH WILL BE ELEVATED TO A RED FLAG WARNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... MONITOR WEATHER FORECASTS AND INFORMATION. && $$ OKZ006-011-015-016-022-035-037-TXZ085-088-200515- /O.CON.KOUN.FW.A.0002.110220T1700Z-110221T0100Z/ ALFALFA-MAJOR-DEWEY-CUSTER-WASHITA-KIOWA-TILLMAN-WILBARGER-BAYLOR- 304 PM CST SAT FEB 19 2011 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... A FIRE WEATHER WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...VERY WARM AIR...AND STRONG WESTERLY WIND INTO FAR WESTERN OKLAHOMA AND ADJACENT PORTIONS OF NORTH TEXAS BY LATE SUNDAY MORNING. IF THE DRIER AIR AND STRONGER WIND LOOKS LIKE IT WILL SPREAD FARTHER EAST...THIS WATCH WILL BE ELEVATED TO A RED FLAG WARNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... MONITOR WEATHER FORECASTS AND INFORMATION. && $$
4 follow-up statements
574 WWUS84 KOUN 200314 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 914 PM CST SAT FEB 19 2011 OKZ006-011-015-016-022-035-037-TXZ085-201115- /O.UPG.KOUN.FW.A.0002.110220T1700Z-110221T0100Z/ /O.EXA.KOUN.FW.W.0002.110220T1700Z-110221T0100Z/ ALFALFA-MAJOR-DEWEY-CUSTER-WASHITA-KIOWA-TILLMAN-WILBARGER- 914 PM CST SAT FEB 19 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 7 PM CST SUNDAY... THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 11 AM TO 7 PM CST SUNDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...VERY WARM AIR...AND STRONG WESTERLY WINDS INTO WESTERN OKLAHOMA AND ADJACENT PORTIONS OF NORTH TEXAS BY LATE SUNDAY MORNING. SUSTAINED WIND SPEEDS 20 TO 25 MPH AND SOME GUSTS OF 30 TO 40 MPH WILL BE POSSIBLE. MINIMUM RELATIVE HUMIDITIES OF 10 TO 20 PERCENT ARE LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. && $$ OKZ004-005-009-010-014-021-033-034-036-TXZ083-084-087-201115- /O.CON.KOUN.FW.W.0002.110220T1700Z-110221T0100Z/ HARPER-WOODS-ELLIS-WOODWARD-ROGER MILLS-BECKHAM-HARMON-GREER- JACKSON-HARDEMAN-FOARD-KNOX- 914 PM CST SAT FEB 19 2011 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 7 PM CST SUNDAY... A RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 7 PM CST SUNDAY. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...VERY WARM AIR...AND STRONG WESTERLY WIND INTO FAR WESTERN OKLAHOMA AND ADJACENT PORTIONS OF NORTH TEXAS BY LATE SUNDAY MORNING. SUSTAINED WIND SPEEDS 20 TO 25 MPH AND SOME GUSTS OF 30 TO 40 MPH WILL BE POSSIBLE. MINIMUM RELATIVE HUMIDITIES OF 10 TO 20 PERCENT ARE LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. && $$ OKZ012-018-024-044-TXZ086-201115- /O.EXA.KOUN.FW.A.0002.110220T1700Z-110221T0100Z/ GARFIELD-KINGFISHER-CANADIAN-COTTON-WICHITA- 914 PM CST SAT FEB 19 2011 ...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A FIRE WEATHER WATCH...WHICH IS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...VERY WARM AIR...AND STRONG WESTERLY WIND INTO FAR WESTERN OKLAHOMA AND ADJACENT PORTIONS OF NORTH TEXAS BY LATE SUNDAY MORNING. IF THE DRIER AIR AND STRONGER WIND LOOKS LIKE IT WILL SPREAD FARTHER EAST...THIS WATCH WILL BE ELEVATED TO A RED FLAG WARNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... MONITOR WEATHER FORECASTS AND INFORMATION. && $$ OKZ007-017-023-038-TXZ088-201115- /O.CON.KOUN.FW.A.0002.110220T1700Z-110221T0100Z/ GRANT-BLAINE-CADDO-COMANCHE-BAYLOR- 914 PM CST SAT FEB 19 2011 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... A FIRE WEATHER WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...VERY WARM AIR...AND STRONG WESTERLY WIND INTO FAR WESTERN OKLAHOMA AND ADJACENT PORTIONS OF NORTH TEXAS BY LATE SUNDAY MORNING. IF THE DRIER AIR AND STRONGER WIND LOOKS LIKE IT WILL SPREAD FARTHER EAST...THIS WATCH WILL BE ELEVATED TO A RED FLAG WARNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... MONITOR WEATHER FORECASTS AND INFORMATION. && $$
522 WWUS84 KOUN 200912 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 312 AM CST SUN FEB 20 2011 OKZ007-012-017-018-023-024-038-044-TXZ086-088-201715- /O.UPG.KOUN.FW.A.0002.110220T1700Z-110221T0100Z/ /O.EXB.KOUN.FW.W.0002.110220T1900Z-110221T0100Z/ GRANT-GARFIELD-BLAINE-KINGFISHER-CADDO-CANADIAN-COMANCHE-COTTON- WICHITA-BAYLOR- 312 AM CST SUN FEB 20 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CST THIS EVENING... A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...AN UNSEASONABLY WARM AIR MASS...AND STRONG WESTERLY WINDS INTO CENTRAL OKLAHOMA BY EARLY AFTERNOON. SUSTAINED WIND SPEEDS 20 TO 25 MPH AND SOME GUSTS TO 30 MPH WILL BE POSSIBLE. MINIMUM RELATIVE HUMIDITY OF 15 TO 20 PERCENT IS LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. && $$ OKZ004>006-009>011-014>016-021-022-033>037-TXZ083>085-087-201715- /O.CON.KOUN.FW.W.0002.110220T1700Z-110221T0100Z/ HARPER-WOODS-ALFALFA-ELLIS-WOODWARD-MAJOR-ROGER MILLS-DEWEY- CUSTER-BECKHAM-WASHITA-HARMON-GREER-KIOWA-JACKSON-TILLMAN- HARDEMAN-FOARD-WILBARGER-KNOX- 312 AM CST SUN FEB 20 2011 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM CST THIS EVENING... A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...AN UNSEASONABLY HOT AIR MASS...AND STRONG WESTERLY WINDS INTO WESTERN OKLAHOMA AND ADJACENT PORTIONS OF NORTH TEXAS BY LATE MORNING. SUSTAINED WIND SPEEDS 20 TO 25 MPH AND SOME GUSTS OF 30 TO 40 MPH WILL BE POSSIBLE. MINIMUM RELATIVE HUMIDITY OF 10 TO 20 PERCENT IS LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. && $$
911 WWUS84 KOUN 201716 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 1116 AM CST SUN FEB 20 2011 OKZ012-018-023-024-038-044-201830- /O.CAN.KOUN.FW.W.0002.110220T1900Z-110221T0100Z/ GARFIELD-KINGFISHER-CADDO-CANADIAN-COMANCHE-COTTON- 1116 AM CST SUN FEB 20 2011 ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN NORMAN HAS CANCELLED THE RED FLAG WARNING. ALTHOUGH VERY HIGH FIRE DANGER IS STILL EXPECTED... AFTERNOON RELATIVE HUMIDITY IS NOW FORECAST TO BE ABOVE 20 PERCENT. THEREFORE THE RED FLAG WARNING HAS BEEN CANCELLED FOR GARFIELD.. KINGFISHER.. CADDO.. CANADIAN.. COMANCHE AND COTTON COUNTIES IN OKLAHOMA. HOWEVER.. CAUTION SHOULD STILL BE USED TO PREVENT THE START OR SPREAD OF WILDFIRES. $$ OKZ004>006-009>011-014>016-021-022-033>037-TXZ083>085-087-210100- /O.CON.KOUN.FW.W.0002.000000T0000Z-110221T0100Z/ HARPER-WOODS-ALFALFA-ELLIS-WOODWARD-MAJOR-ROGER MILLS-DEWEY- CUSTER-BECKHAM-WASHITA-HARMON-GREER-KIOWA-JACKSON-TILLMAN- HARDEMAN-FOARD-WILBARGER-KNOX- 1116 AM CST SUN FEB 20 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CST THIS EVENING... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CST THIS EVENING. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...AN UNSEASONABLY WARM AIR MASS...AND STRONG WESTERLY WINDS INTO WESTERN OKLAHOMA AND WESTERN PORTIONS OF NORTH TEXAS THIS AFTERNOON. SUSTAINED WIND SPEEDS 20 TO 25 MPH AND SOME GUSTS OF 30 TO 40 MPH WILL BE POSSIBLE. MINIMUM RELATIVE HUMIDITY OF 10 TO 20 PERCENT IS LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. && $$ OKZ007-017-TXZ086-088-210100- /O.CON.KOUN.FW.W.0002.110220T1900Z-110221T0100Z/ GRANT-BLAINE-WICHITA-BAYLOR- 1116 AM CST SUN FEB 20 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CST THIS EVENING... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CST THIS EVENING. A DRY LINE WILL BRING LOW RELATIVE HUMIDITY...AN UNSEASONABLY WARM AIR MASS...AND GUSTY WESTERLY WINDS INTO THE AREA AFTERNOON. SUSTAINED WIND SPEEDS 20 TO 25 MPH AND SOME GUSTS TO 30 MPH WILL BE POSSIBLE. MINIMUM RELATIVE HUMIDITY OF 15 TO 20 PERCENT IS LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. && $$
542 WWUS84 KOUN 202051 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 251 PM CST SUN FEB 20 2011 OKZ007-017-TXZ086-202200- /O.CAN.KOUN.FW.W.0002.000000T0000Z-110221T0100Z/ GRANT-BLAINE-WICHITA- 251 PM CST SUN FEB 20 2011 ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN NORMAN HAS CANCELLED THE RED FLAG WARNING. ALTHOUGH RED FLAG WARNING CONDITIONS ARE NO LONGER EXPECTED...WARM AND BREEZY CONDITIONS WILL CONTINUE THROUGH LATE AFTERNOON. OUTDOOR BURNING OR OTHER ACTIVITY THAT COULD LEAD TO WILDFIRES IS STILL STRONGLY DISCOURAGED. $$ OKZ004>006-009>011-014>016-021-022-033>037-TXZ083>085-087-088- 210000- /O.EXT.KOUN.FW.W.0002.000000T0000Z-110221T0000Z/ HARPER-WOODS-ALFALFA-ELLIS-WOODWARD-MAJOR-ROGER MILLS-DEWEY- CUSTER-BECKHAM-WASHITA-HARMON-GREER-KIOWA-JACKSON-TILLMAN- HARDEMAN-FOARD-WILBARGER-KNOX-BAYLOR- 251 PM CST SUN FEB 20 2011 ...RED FLAG WARNING NOW IN EFFECT UNTIL 6 PM CST THIS EVENING... LOW RELATIVE HUMIDITY...VERY WARM AIR...AND MODERATE TO STRONG WEST AND SOUTHWEST WINDS WILL CONTINUE ACROSS WESTERN OKLAHOMA AND PORTIONS OF WESTERN NORTH TEXAS THROUGH 6 PM. SUSTAINED WIND SPEEDS 20 TO 25 MPH AND SOME GUSTS TO 30 MPH WILL BE POSSIBLE. MINIMUM RELATIVE HUMIDITY OF 15 TO 20 PERCENT IS LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. AVOID ALL OUTDOOR BURNING AND OTHER ACTIVITIES THAT COULD START A WILDFIRE. && $$
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 19, 4:49 AM CST | Fire Weather Watch | OUN | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 18 more | 22 hr |
Nearby
Red Flag Warnings in Oklahoma, 2011Red Flag Warnings in Texas, 2011Every red flag warning in 2011
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.