Alert archive / Oklahoma / Red Flag Warnings in 2011
Red Flag Warning 5, NWS Tulsa, OK
NWS Tulsa, OK issued this red flag warning at Apr 17, 2011, 3:49 AM CDT for 4 counties in Oklahoma. It took effect at Apr 17, 2011, 1:00 PM CDT. It was in force for 6 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, 3:49 AM CDT (08:49 UTC)
- In effect from
- Apr 17, 2011, 1:00 PM CDT
- Expired
- Apr 17, 2011, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS Tulsa, OK
Counties Creek County, OK, Okfuskee County, OK, Okmulgee County, OK, Tulsa County, OK
The radar
The Tulsa radar (KINX), 68 km from the middle of the area, began a volume at 08:53 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, 8.8 hours before the alert went out and 129 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.
721 WWUS84 KTSA 170849 RFWTSA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TULSA OK 349 AM CDT SUN APR 17 2011 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED THIS AFTERNOON OVER PORTIONS OF NORTHEAST OKLAHOMA... .STRONG WINDS AND LOW HUMIDITY WILL COMBINE TO CREATE CONDITIONS FAVORABLE FOR THE RAPID GROWTH AND SPREAD OF WILDFIRES. OKZ060-064>066-171700- /O.NEW.KTSA.FW.W.0005.110417T1800Z-110418T0000Z/ TULSA-CREEK-OKFUSKEE-OKMULGEE- 349 AM CDT SUN APR 17 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING. FOR THE FOLLOWING COUNTIES... IN OKLAHOMA... TULSA...CREEK...OKFUSKEE AND OKMULGEE. SOUTH WINDS FROM 15 TO 25 MPH WITH GUSTS NEAR 35 MPH WILL COMBINE WITH RH VALUES IN THE 20 PERCENT RANGE IN AN AREA FROM TULSA SOUTH TO OKEMAH AND POINTS WEST. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING IS ISSUED WHEN CRITICAL FIRE WEATHER CONDITIONS ARE ONGOING OR EXPECTED TO DEVELOP WITHIN THE NEXT 24 HOURS. THESE CONDITIONS SUPPORT THE POTENTIAL RAPID GROWTH AND SPREAD OF WILDFIRES. && $$
1 follow-up statement
655 WWUS84 KTSA 171651 RFWTSA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE TULSA OK 1151 AM CDT SUN APR 17 2011 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED THIS AFTERNOON OVER PORTIONS OF NORTHEAST OKLAHOMA... .STRONG WINDS AND LOW HUMIDITY WILL COMBINE TO CREATE CONDITIONS FAVORABLE FOR THE RAPID GROWTH AND SPREAD OF WILDFIRES. OKZ060-064>066-180000- /O.CON.KTSA.FW.W.0005.110417T1800Z-110418T0000Z/ TULSA-CREEK-OKFUSKEE-OKMULGEE- 1151 AM CDT SUN APR 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... FOR THE FOLLOWING COUNTIES... IN OKLAHOMA... TULSA...CREEK...OKFUSKEE AND OKMULGEE. SOUTH WINDS FROM 15 TO 25 MPH WITH GUSTS NEAR 35 MPH WILL COMBINE WITH RELATIVE HUMIDITY VALUES IN THE 20 PERCENT RANGE IN AN AREA FROM TULSA SOUTH TO OKEMAH AND POINTS WEST. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING IS ISSUED WHEN CRITICAL FIRE WEATHER CONDITIONS ARE ONGOING OR EXPECTED TO DEVELOP WITHIN THE NEXT 24 HOURS. THESE CONDITIONS SUPPORT THE POTENTIAL RAPID GROWTH AND SPREAD OF WILDFIRES. && $$
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.