Alert archive / Oklahoma / Red Flag Warnings in 2011
Red Flag Warning 4, NWS Tulsa, OK
NWS Tulsa, OK issued this red flag warning at Apr 10, 2011, 4:18 AM CDT for 8 counties in Oklahoma. It took effect at Apr 10, 2011, 11:00 AM CDT. It was in force for 10 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 10, 2011, 4:18 AM CDT (09:18 UTC)
- In effect from
- Apr 10, 2011, 11:00 AM CDT
- Expired
- Apr 10, 2011, 9:00 PM CDT
- In force
- 10 hr
- Issued by
- NWS Tulsa, OK
Counties Creek County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Pawnee County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 44 km from the middle of the area, began a volume at 09:21 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, 9.3 hours before the alert went out and 137 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
- 3252 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
188 WWUS84 KTSA 100918 RFWTSA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TULSA OK 418 AM CDT SUN APR 10 2011 ...CRITICAL FIRE DANGER LIKELY IN PARTS OF NORTHEAST OKLAHOMA TODAY... .A DRYLINE WILL MOVE EAST ACROSS CENTRAL INTO NORTHEAST OKLAHOMA TODAY. BY AFTERNOON...SOUTHWEST WINDS WILL INCREASE AND RELATIVE HUMIDITIES WILL BECOME VERY LOW BEHIND THE DRYLINE...POTENTIALLY CREATING VERY DANGEROUS CONDITIONS FOR THE GROWTH AND SPREAD OF WILDFIRES. OKZ054>056-059>061-064>066-110300- /O.UPG.KTSA.FW.A.0004.110410T1600Z-110411T0300Z/ /O.NEW.KTSA.FW.W.0004.110410T1600Z-110411T0300Z/ OSAGE-WASHINGTON OK-NOWATA-PAWNEE-TULSA-ROGERS-CREEK-OKFUSKEE- OKMULGEE- 418 AM CDT SUN APR 10 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 10 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM CDT THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. FOR THE FOLLOWING COUNTIES... IN OKLAHOMA... OSAGE...WASHINGTON...NOWATA...PAWNEE...TULSA...ROGERS...CREEK... OKFUSKEE AND OKMULGEE. A DRYLINE WILL MOVE EAST TO AN OKMULGEE TO CLAREMORE TO NOWATA LINE BY THIS AFTERNOON. SOUTHWEST WINDS WILL INCREASE...GUSTING TO AROUND 35 MILES AN HOUR WITH RELATIVE HUMIDITY VALUES OF NEAR OR JUST BELOW 25 PERCENT TO THE WEST OF THE DRYLINE. SPREAD INDEX VALUES WILL BE NEAR 60 IN THE WARNING AREA WHICH INDICATES THE POTENTIAL FOR RAPID WILDFIRE GROWTH AND SPREAD. OSAGE...PAWNEE...CREEK...OKFUSKEE...TULSA AND OKMULGEE COUNTIES ARE CURRENTLY IN A BURN BAN. OUTDOOR BURNING OF ANY KIND IS PROHIBITED IN THESE AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT A DANGEROUS COMBINATION OF WEATHER CONDITIONS AND DRY VEGETATION IS EXPECTED WITHIN 24 HOURS...FAVORING RAPID GROWTH AND SPREAD OF ANY WILDFIRES. THE PRIMARY WEATHER FACTORS INCLUDE STRONGER WINDS...LOWER HUMIDITIES...AND WARMER TEMPERATURES. && $$
2 follow-up statements
122 WWUS84 KTSA 102028 RFWTSA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TULSA OK 328 PM CDT SUN APR 10 2011 ...CRITICAL FIRE DANGER LIKELY IN PARTS OF NORTHEAST OKLAHOMA TODAY... .A DRYLINE CONTINUES TO PUSH ACROSS CENTRAL AND EASTERN OKLAHOMA THIS AFTERNOON...WITH GUSTY SOUTHWEST WINDS AND LOW RELATIVE HUMIDITIES BEING OBSERVED BEHIND THE BOUNDARY. THESE CONDITIONS WILL CONTINUE TO POTENTIALLY CREATE VERY DANGEROUS CONDITIONS FOR THE GROWTH AND SPREAD OF WILDFIRES. OKZ054>056-059>061-064>066-110300- /O.CON.KTSA.FW.W.0004.000000T0000Z-110411T0300Z/ OSAGE-WASHINGTON OK-NOWATA-PAWNEE-TULSA-ROGERS-CREEK-OKFUSKEE- OKMULGEE- 328 PM CDT SUN APR 10 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... FOR THE FOLLOWING COUNTIES... IN OKLAHOMA... OSAGE...WASHINGTON...NOWATA...PAWNEE...TULSA...ROGERS...CREEK... OKFUSKEE AND OKMULGEE. A DRYLINE WILL MOVE CONTINUE TO PUSH EAST ACROSS NORTHEAST OKLAHOMA THIS AFTERNOON AND EVENING. WEST TO SOUTHWEST WINDS...GUSTING TO AROUND 25 MILES AN HOUR WITH RELATIVE HUMIDITY VALUES OF NEAR OR JUST BELOW 25 PERCENT TO THE WEST OF THE DRYLINE. HIGH SPREAD INDEX VALUES IN THE WARNING AREA INDICATES THE POTENTIAL FOR RAPID WILDFIRE GROWTH AND SPREAD. OSAGE...PAWNEE...CREEK...OKFUSKEE...TULSA AND OKMULGEE COUNTIES ARE CURRENTLY IN A BURN BAN. OUTDOOR BURNING OF ANY KIND IS PROHIBITED IN THESE AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT A DANGEROUS COMBINATION OF WEATHER CONDITIONS AND DRY VEGETATION IS EXPECTED WITHIN 24 HOURS... FAVORING RAPID GROWTH AND SPREAD OF ANY WILDFIRES. THE PRIMARY WEATHER FACTORS INCLUDE STRONGER WINDS...LOWER HUMIDITIES...AND WARMER TEMPERATURES. && $$
702 WWUS84 KTSA 110200 RFWTSA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TULSA OK 900 PM CDT SUN APR 10 2011 .FIRE WEATHER CONDITIONS HAVE IMPROVED THIS EVENING AS WINDS HAVE BECOME LIGHT. THEREFORE...THE RED FLAG WARNING WILL BE CANCELLED EARLY. OKZ054>056-059>061-064>066-110300- /O.CAN.KTSA.FW.W.0004.000000T0000Z-110411T0300Z/ OSAGE-WASHINGTON OK-NOWATA-PAWNEE-TULSA-ROGERS-CREEK-OKFUSKEE- OKMULGEE- 900 PM CDT SUN APR 10 2011 ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN TULSA HAS CANCELLED THE RED FLAG WARNING. FOR THE FOLLOWING COUNTIES... IN OKLAHOMA... OSAGE...WASHINGTON...NOWATA...PAWNEE...TULSA...ROGERS...CREEK... OKFUSKEE AND OKMULGEE. WINDS HAVE DECREASED BELOW 10 MPH...WHILE RELATIVE HUMIDITIES RECOVER AS TEMPERATURES COOL. THUS...THE RED FLAG WARNING WILL BE CANCELLED. $$ LACY
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 9:58 AM CDT | Wind Advisory | TSA | Craig, Delaware, Mayes, Nowata, Ottawa | 6 hr |
Nearby
Red Flag Warnings in Oklahoma, 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.