Alert archive / Oklahoma / Red Flag Warnings in 2011
Red Flag Warning 21, NWS Norman, OK
NWS Norman, OK issued this red flag warning at Apr 17, 2011, 4:47 AM CDT for 8 counties in Texas; 42 counties in Oklahoma. It took effect at Apr 17, 2011, 11:00 AM CDT. It was in force for 9 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
- Apr 17, 2011, 4:47 AM CDT (09:47 UTC)
- In effect from
- Apr 17, 2011, 11:00 AM CDT
- Expired
- Apr 17, 2011, 8:00 PM CDT
- In force
- 9 hr
- Issued by
- NWS Norman, OK
All 50 counties
Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland 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, Jackson County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major 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), 97 km from the middle of the area, began a volume at 09:46 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, 9.8 hours before the alert went out and 85 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 4264 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
537 WWUS84 KOUN 170947 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 447 AM CDT SUN APR 17 2011 OKZ004>031-033>042-044>046-050-TXZ083>090-171800- /O.UPG.KOUN.FW.A.0022.110417T1600Z-110418T0100Z/ /O.NEW.KOUN.FW.W.0021.110417T1600Z-110418T0100Z/ 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-HARMON-GREER-KIOWA-JACKSON- TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COTTON-JEFFERSON- CARTER-LOVE-HARDEMAN-FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER- CLAY- 447 AM CDT SUN APR 17 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM CDT THIS EVENING FOR ALL OF WESTERN NORTH TEXAS AND MOST OF WESTERN AND CENTRAL OKLAHOMA... THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM CDT THIS EVENING FOR WESTERN NORTH TEXAS AND ALL OF WESTERN AND CENTRAL OKLAHOMA. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * WINDS... SOUTH TO SOUTHWEST 15 TO 30 MPH WITH HIGHER GUSTS. * HUMIDITY...12 TO 20 PERCENT. * TEMPERATURES...LOW 80S EAST AND NORTH...TO LOW 90S SOUTHWEST. * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. OUTDOOR BURNING IS NOT RECOMMENDED. * WILDFIRE POTENTIAL REMAIN VERY HIGH TO EXTREME ON MONDAY AND TUESDAY. ADDITIONAL FIRE WEATHER HEADLINES WILL LIKELY BE ISSUED ON BOTH DAYS FOR PARTS OF THE AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. MONITOR FOR FURTHER UPDATES AND POSSIBLE FIRE WEATHER WATCHES OR RED FLAG WARNINGS ON MONDAY AND TUESDAY. && $$
4 follow-up statements
801 WWUS84 KOUN 171519 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 1019 AM CDT SUN APR 17 2011 OKZ004>031-033>042-044>046-050-TXZ083>090-180100- /O.CON.KOUN.FW.W.0021.110417T1600Z-110418T0100Z/ HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD- NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE- BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN- CLEVELAND-POTTAWATOMIE-SEMINOLE-HARMON-GREER-KIOWA-JACKSON- TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COTTON-JEFFERSON- CARTER-LOVE-HARDEMAN-FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER- CLAY- 1019 AM CDT SUN APR 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WINDS... SOUTH TO SOUTHWEST 15 TO 30 MPH WITH HIGHER GUSTS. * HUMIDITY...12 TO 20 PERCENT. * TEMPERATURES...LOW 80S TO LOW 90S. * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. OUTDOOR BURNING IS NOT RECOMMENDED. * WILDFIRE POTENTIAL IN THE VERY HIGH TO EXTREME CATEGORY IS EXPECTED ON MONDAY AND TUESDAY. ADDITIONAL FIRE WEATHER HEADLINES WILL LIKELY BE ISSUED ON BOTH DAYS FOR PARTS OF THE AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. MONITOR FOR FURTHER UPDATES AND POSSIBLE FIRE WEATHER WATCHES OR RED FLAG WARNINGS ON MONDAY AND TUESDAY. && $$
886 WWUS84 KOUN 171956 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 256 PM CDT SUN APR 17 2011 OKZ033>038-044-TXZ083>090-180400- /O.NEW.KOUN.FW.A.0023.110418T1600Z-110419T0100Z/ /O.CON.KOUN.FW.W.0021.000000T0000Z-110418T0100Z/ HARMON-GREER-KIOWA-JACKSON-TILLMAN-COMANCHE-COTTON-HARDEMAN-FOARD- WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY- 256 PM CDT SUN APR 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR WESTERN NORTH TEXAS AND MUCH OF OKLAHOMA... ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WESTERN NORTH TEXAS AND PARTS OF SOUTHWEST OKLAHOMA... * WINDS... SOUTH TO SOUTHWEST 15 TO 30 MPH WITH HIGHER GUSTS. * HUMIDITY...12 TO 20 PERCENT. * TEMPERATURES...LOW 80S TO LOW 90S. * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. OUTDOOR BURNING IS NOT RECOMMENDED. * WILDFIRE POTENTIAL IN THE VERY HIGH TO EXTREME CATEGORY IS EXPECTED ON MONDAY AND TUESDAY. ADDITIONAL FIRE WEATHER HEADLINES WILL LIKELY BE ISSUED ON BOTH DAYS FOR PARTS OF THE AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. MONITOR FOR FURTHER UPDATES AND POSSIBLE FIRE WEATHER WATCHES OR RED FLAG WARNINGS ON MONDAY AND TUESDAY. MONITOR WEATHER FORECASTS AND INFORMATION. && $$ OKZ004>031-039>042-045-046-050-180100- /O.CON.KOUN.FW.W.0021.000000T0000Z-110418T0100Z/ HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD- NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE- BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN- CLEVELAND-POTTAWATOMIE-SEMINOLE-STEPHENS-GARVIN-MURRAY-PONTOTOC- JEFFERSON-CARTER-LOVE- 256 PM CDT SUN APR 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WINDS... SOUTH TO SOUTHWEST 15 TO 30 MPH WITH HIGHER GUSTS. * HUMIDITY...12 TO 20 PERCENT. * TEMPERATURES...LOW 80S TO LOW 90S. * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. OUTDOOR BURNING IS NOT RECOMMENDED. * WILDFIRE POTENTIAL IN THE VERY HIGH TO EXTREME CATEGORY IS EXPECTED ON MONDAY AND TUESDAY. ADDITIONAL FIRE WEATHER HEADLINES WILL LIKELY BE ISSUED ON BOTH DAYS FOR PARTS OF THE AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. MONITOR FOR FURTHER UPDATES AND POSSIBLE FIRE WEATHER WATCHES OR RED FLAG WARNINGS ON MONDAY AND TUESDAY. && $$
867 WWUS84 KOUN 172312 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 612 PM CDT SUN APR 17 2011 OKZ033>038-044-TXZ083>090-180715- /O.CON.KOUN.FW.W.0021.000000T0000Z-110418T0100Z/ /O.CON.KOUN.FW.A.0023.110418T1600Z-110419T0100Z/ HARMON-GREER-KIOWA-JACKSON-TILLMAN-COMANCHE-COTTON-HARDEMAN-FOARD- WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY- 612 PM CDT SUN APR 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS... * WINDS...THIS EVENING SOUTHWEST 20 TO 25...GUSTING 35 MPH. MONDAY SOUTHWEST 20...GUSTING 35 MPH. * HUMIDITY...THIS EVENING 12 TO 20 PERCENT. MONDAY 7 TO 11 PERCENT. * TEMPERATURES...THIS EVENING 84 TO 90. MONDAY 95 TO 99. * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. OUTDOOR BURNING IS NOT RECOMMENDED. * OUTLOOK...WILDFIRE POTENTIAL IN THE VERY HIGH TO EXTREME CATEGORY IS ALSO EXPECTED ON TUESDAY...WHEN AN ADDITIONAL FIRE WEATHER HEADLINE WILL LIKELY BE ISSUED. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. MONITOR FOR FURTHER UPDATES AND POSSIBLE FIRE WEATHER WATCHES OR RED FLAG WARNINGS ON MONDAY AND TUESDAY. MONITOR WEATHER FORECASTS AND INFORMATION. && $$ OKZ021>023-180715- /O.EXA.KOUN.FW.A.0023.110418T1600Z-110419T0100Z/ /O.CON.KOUN.FW.W.0021.000000T0000Z-110418T0100Z/ BECKHAM-WASHITA-CADDO- 612 PM CDT SUN APR 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR WESTERN OKLAHOMA... ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WESTERN OKLAHOMA... * WINDS...THIS EVENING SOUTHWEST 20 TO 25...GUSTING 35 MPH. MONDAY SOUTHWEST 20...GUSTING 30 MPH. * HUMIDITY...THIS EVENING 12 TO 15 PERCENT. MONDAY 8 TO 12 PERCENT. * TEMPERATURES...THIS EVENING 82 TO 86. MONDAY 93 TO 97. * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. OUTDOOR BURNING IS NOT RECOMMENDED. * OUTLOOK...WILDFIRE POTENTIAL IN THE VERY HIGH TO EXTREME CATEGORY IS ALSO EXPECTED ON TUESDAY...WHEN AN ADDITIONAL FIRE WEATHER HEADLINE WILL LIKELY BE ISSUED. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. MONITOR FOR FURTHER UPDATES AND POSSIBLE FIRE WEATHER WATCHES OR RED FLAG WARNINGS ON MONDAY AND TUESDAY. MONITOR WEATHER FORECASTS AND INFORMATION. && $$ OKZ004>020-024>031-039>042-045-046-050-180100- /O.CON.KOUN.FW.W.0021.000000T0000Z-110418T0100Z/ HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD- NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE- CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-POTTAWATOMIE- SEMINOLE-STEPHENS-GARVIN-MURRAY-PONTOTOC-JEFFERSON-CARTER-LOVE- 612 PM CDT SUN APR 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR NORTHERN...WESTERN...CENTRAL...AND MUCH OF SOUTHERN OKLAHOMA... * WINDS... SOUTHWEST 20 TO 25...GUSTING 35 MPH. * HUMIDITY...15 TO 20 PERCENT. * TEMPERATURES...80S. * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. OUTDOOR BURNING IS NOT RECOMMENDED. * OUTLOOK...WILDFIRE POTENTIAL IN THE VERY HIGH TO EXTREME CATEGORY IS ALSO EXPECTED ON TUESDAY...WHEN AN ADDITIONAL FIRE WEATHER HEADLINE WILL LIKELY BE ISSUED. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. MONITOR FOR FURTHER UPDATES AND POSSIBLE FIRE WEATHER WATCHES OR RED FLAG WARNINGS ON MONDAY AND TUESDAY. && $$
215 WWUS84 KOUN 180106 RFWOUN URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORMAN OK 806 PM CDT SUN APR 17 2011 OKZ021>023-033>038-044-TXZ083>090-181000- /O.EXP.KOUN.FW.W.0021.000000T0000Z-110418T0100Z/ /O.CON.KOUN.FW.A.0023.110418T1600Z-110419T0100Z/ BECKHAM-WASHITA-CADDO-HARMON-GREER-KIOWA-JACKSON-TILLMAN-COMANCHE- COTTON-HARDEMAN-FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY- 806 PM CDT SUN APR 17 2011 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS... ...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT THIS EVENING FOR SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS... * WINDS...TONIGHT 10 TO 20...GUSTING 25 MPH. MONDAY SOUTHWEST AROUND 20...GUSTING 35 MPH. * HUMIDITY...IMPROVING TO 60 TO 70 PERCENT TONIGHT MOST AREAS...40 TO 60 PERCENT FAR WEST. DROPPING MONDAY TO 7 TO 11 PERCENT. * TEMPERATURES...LOWS TONIGHT 52 TO 64. HIGHS MONDAY 95 TO 99. * IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. OUTDOOR BURNING IS NOT RECOMMENDED. * OUTLOOK...WILDFIRE POTENTIAL IN THE VERY HIGH TO EXTREME CATEGORY IS ALSO EXPECTED ON TUESDAY...WHEN AN ADDITIONAL FIRE WEATHER HEADLINE WILL LIKELY BE ISSUED. PRECAUTIONARY/PREPAREDNESS ACTIONS... FIRES MAY START EASILY AND SPREAD RAPIDLY. REPORT SMOKE OR FIRE TO YOUR LOCAL FIRE DEPARTMENT. MONITOR FOR FURTHER UPDATES AND POSSIBLE FIRE WEATHER WATCHES OR RED FLAG WARNINGS ON MONDAY AND TUESDAY. && $$ OKZ004>020-024>031-039>042-045-046-050-180215- /O.EXP.KOUN.FW.W.0021.000000T0000Z-110418T0100Z/ HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD- NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE- CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-POTTAWATOMIE- SEMINOLE-STEPHENS-GARVIN-MURRAY-PONTOTOC-JEFFERSON-CARTER-LOVE- 806 PM CDT SUN APR 17 2011 ...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT THIS EVENING FOR NORTHERN AND CENTRAL OKLAHOMA AND PARTS OF NORTHWEST AND SOUTH CENTRAL OKLAHOMA... * OUTLOOK...GULF MOISTURE WILL IMPROVE HUMIDITY OVERNIGHT...ESTABLISHING A DRYLINE IN FAR WESTERN OKLAHOMA. THE DRYLINE IS FORECAST TO PUSH BACK THROUGH THE MAIN BODY OF OKLAHOMA ON TUESDAY. ADDITIONAL RED FLAG HEADLINES MAY BE ISSUED FOR TUESDAY. $$
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 11:57 AM CDT | Wind Advisory | OUN | Archer, Clay, Wichita | 8 hr |
| Apr 17, 2:56 PM CDT | Fire Weather Watch | OUN | Archer, Baylor, Clay, Foard, Hardeman, Knox and 2 more | 14 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.