Alert archive / Oklahoma / Red Flag Warnings in 2021
Red Flag Warning 2, NWS Norman, OK
NWS Norman, OK issued this red flag warning at Mar 10, 2021, 2:38 AM CST for 18 counties in Oklahoma; Foard County, Hardeman County, Texas. It took effect at Mar 10, 2021, 11:00 AM CST. 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
- Mar 10, 2021, 2:38 AM CST (08:38 UTC)
- In effect from
- Mar 10, 2021, 11:00 AM CST
- Expired
- Mar 10, 2021, 9:00 PM CST
- In force
- 10 hr
- Issued by
- NWS Norman, OK
Counties Alfalfa County, OK, Beckham County, OK, Blaine 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, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Foard County, TX, Hardeman County, TX
The radar
The Vance AFB radar (KVNX), 147 km from the middle of the area, began a volume at 08:35 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, 8.6 hours before the alert went out and 163 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
- 1309 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 277 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
992 WWUS84 KOUN 100838 RFWOUN URGENT - FIRE WEATHER MESSAGE National Weather Service Norman OK 238 AM CST Wed Mar 10 2021 OKZ004-005-009-010-014>016-021-022-033-034-110000- /O.UPG.KOUN.FW.A.0001.210310T1700Z-210311T0300Z/ /O.NEW.KOUN.FW.W.0002.210310T1700Z-210311T0300Z/ Harper-Woods-Ellis-Woodward-Roger Mills-Dewey-Custer-Beckham- Washita-Harmon-Greer- 238 AM CST Wed Mar 10 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM CST THIS EVENING FOR strong winds and low relative humidities FOR western and northwestern Oklahoma and parts of western north Texas... * WINDS...Southwest 15 to 25 mph with gusts of 35 to 40 mph. * RELATIVE HUMIDITY...As low as 6 percent. * TEMPERATURES...Up to 85 degrees. * IMPACTS...Any fires that start in this environment will be very difficult to control. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures will contribute to extreme fire behavior. && $$ OKZ006-007-011-012-017-035-036-TXZ083-084-110000- /O.NEW.KOUN.FW.W.0002.210310T1700Z-210311T0300Z/ Alfalfa-Grant-Major-Garfield-Blaine-Kiowa-Jackson-Hardeman-Foard- 238 AM CST Wed Mar 10 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM CST THIS EVENING FOR strong winds and low relative humidities FOR western and northwestern Oklahoma and parts of western north Texas... * WINDS...South 15 to 25 mph with gusts of 35 to 40 mph. * RELATIVE HUMIDITY...As low as 9 percent. * TEMPERATURES...Up to 86 degrees. * IMPACTS...Any fires that start in this environment will be very difficult to control. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures will contribute to extreme fire behavior. && $$
1 follow-up statement
594 WWUS84 KOUN 110116 RFWOUN URGENT - FIRE WEATHER MESSAGE National Weather Service Norman OK 716 PM CST Wed Mar 10 2021 OKZ007-012-035-036-TXZ083-084-110230- /O.CAN.KOUN.FW.W.0002.000000T0000Z-210311T0300Z/ Grant-Garfield-Kiowa-Jackson-Hardeman-Foard- 716 PM CST Wed Mar 10 2021 ...RED FLAG WARNING IS CANCELLED FOR portions of north Texas and southwestern, central and north central Oklahoma.... The National Weather Service in Norman has cancelled the Red Flag Warning for areas for Grant, Garfield, Kiowa and Jackson Counties in Oklahoma, and Hardeman and Foard Counties in Texas. Humidity has increased in these areas. $$ OKZ004>006-009>011-014>017-021-022-033-034-110300- /O.CON.KOUN.FW.W.0002.000000T0000Z-210311T0300Z/ Harper-Woods-Alfalfa-Ellis-Woodward-Major-Roger Mills-Dewey- Custer-Blaine-Beckham-Washita-Harmon-Greer- 716 PM CST Wed Mar 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CST THIS EVENING FOR WARM TEMPERATURES AND LOW RELATIVE HUMIDITY FOR WESTERN OKLAHOMA... * WINDS...South 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...10 to 20 percent. * TEMPERATURES...Mid to upper 60s. * IMPACTS...Any fires that start in this environment will be very difficult to control. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures will contribute to extreme fire behavior. && $$
Nearby
Red Flag Warnings in Oklahoma, 2021Red Flag Warnings in Texas, 2021Every red flag warning in 2021
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.