Alert archive / Texas / Red Flag Warnings in 2011
Red Flag Warning 21, NWS Amarillo, TX
NWS Amarillo, TX issued this red flag warning at Apr 20, 2011, 3:33 PM CDT for 4 counties in Texas; Cimarron County, Oklahoma. It took effect at Apr 21, 2011, 1:00 PM CDT. It was in force for 8 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 20, 2011, 3:33 PM CDT (20:33 UTC)
- In effect from
- Apr 21, 2011, 1:00 PM CDT
- Expired
- Apr 21, 2011, 9:03 PM CDT
- In force
- 8 hr
- Issued by
- NWS Amarillo, TX
Counties Cimarron County, OK, Dallam County, TX, Deaf Smith County, TX, Hartley County, TX, Oldham County, TX
The radar
The Amarillo radar (KAMA), 105 km from the middle of the area, began a volume at 20:38 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 8.6 hours before the alert went out and 106 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
- 1286 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 268 m²/s²
- 0-3 km storm-relative helicity
- 371 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
303 WWUS84 KAMA 202033 RFWAMA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE AMARILLO TX 333 PM CDT WED APR 20 2011 OKZ001-TXZ001-006-011-016-211200- /O.NEW.KAMA.FW.W.0021.110421T1800Z-110422T0200Z/ CIMARRON-DALLAM-HARTLEY-OLDHAM-DEAF SMITH- 333 PM CDT WED APR 20 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM CDT THURSDAY FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR THE FAR WESTERN TEXAS AND OKLAHOMA PANHANDLES... THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 1 PM TO 9 PM CDT THURSDAY FOR THE FAR WESTERN TEXAS AND OKLAHOMA PANHANDLES. * AFFECTED AREA: IN OKLAHOMA...CIMARRON. IN TEXAS...DALLAM... HARTLEY...OLDHAM...DEAF SMITH. * WIND: SOUTHWESTERLY WINDS OF 15 TO 25 MPH WILL BE POSSIBLE BEHIND A DRY LINE TOMORROW. * HUMIDITY:MINIMUM RELATIVE HUMIDITY VALUES ARE EXPECTED TO RANGE FROM 10 TO 15 PERCENT TOMORROW. * TIMING: ALTHOUGH WINDS WILL INCREASE BY LATE MORNING...RELATIVE HUMIDITY VALUES WILL BE SLOW TO FALL THROUGH THE AFTERNOON. THEREFORE...CRITICAL FIRE WEATHER CONDITIONS ARE NOT EXPECTED UNTIL THE AFTERNOON CONTINUING THROUGH THE EARLY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... RELATIVE HUMIDITIES OF 15 PERCENT OR LESS...SUSTAINED 20 FOOT WINDS OF 20 MPH OR GREATER...AND AN ELEVATED FIRE DANGER RATING WILL CREATE RED FLAG CONDITIONS. && $$ JOHNSON FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE VISIT... HTTP://WWW.SRH.NOAA.GOV/AMA
3 follow-up statements
549 WWUS84 KAMA 210917 RFWAMA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE AMARILLO TX 417 AM CDT THU APR 21 2011 OKZ001-TXZ001-006-011-016-212130- /O.CON.KAMA.FW.W.0021.110421T1800Z-110422T0200Z/ CIMARRON-DALLAM-HARTLEY-OLDHAM-DEAF SMITH- 417 AM CDT THU APR 21 2011 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM CDT THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR THE FAR WESTERN TEXAS AND OKLAHOMA PANHANDLES... A RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM CDT THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR THE FAR WESTERN TEXAS AND OKLAHOMA PANHANDLES. * AFFECTED AREA: IN OKLAHOMA...CIMARRON. IN TEXAS...DALLAM... HARTLEY...OLDHAM...DEAF SMITH. * WIND: SOUTH TO SOUTHWEST WINDS OF 15 TO 30 MPH WITH GUSTS UP TO 40 MPH WILL DEVELOP BY 1 PM TODAY WEST OF A DEVELOPING DRYLINE. THESE WINDS CAN BE EXPECTED THROUGH 9 PM THIS EVENING BEFORE DIMINISHING. * HUMIDITY: MINIMUM RELATIVE HUMIDITY VALUES WILL BE BETWEEN 8 AND 15 PERCENT THIS AFTERNOON AND EARLY EVENING. * TIMING: ALTHOUGH WINDS WILL INCREASE BY LATE MORNING...RELATIVE HUMIDITY VALUES WILL BE SLOW TO FALL. THEREFORE...CRITICAL FIRE WEATHER CONDITIONS ARE NOT EXPECTED UNTIL 1 PM TODAY...CONTINUING THROUGH 9 PM THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... RELATIVE HUMIDITIES OF 15 PERCENT OR LESS...SUSTAINED 20 FOOT WINDS OF 20 MPH OR GREATER...AND AN ELEVATED FIRE DANGER RATING WILL CREATE RED FLAG CONDITIONS. && $$ MBS FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE VISIT... HTTP://WWW.SRH.NOAA.GOV/AMA
502 WWUS84 KAMA 212030 RFWAMA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE AMARILLO TX 330 PM CDT THU APR 21 2011 OKZ001-TXZ001-006-011-016-220200- /O.CON.KAMA.FW.W.0021.000000T0000Z-110422T0200Z/ CIMARRON-DALLAM-HARTLEY-OLDHAM-DEAF SMITH- 330 PM CDT THU APR 21 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR THE FAR WESTERN TEXAS AND OKLAHOMA PANHANDLES... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING. * AFFECTED AREA: IN OKLAHOMA...CIMARRON. IN TEXAS...DALLAM... HARTLEY...OLDHAM...DEAF SMITH. * WIND: SOUTH TO SOUTHWEST WINDS OF 15 TO 30 MPH WITH HIGHER GUSTS CAN BE EXPECTED THROUGH 9 PM THIS EVENING BEFORE DIMINISHING. * HUMIDITY: MINIMUM RELATIVE HUMIDITY VALUES WILL BE BETWEEN 10 AND 15 PERCENT THROUGH THIS EVENING. * TIMING: CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE THROUGH 9 PM. PRECAUTIONARY/PREPAREDNESS ACTIONS... RELATIVE HUMIDITIES OF 15 PERCENT OR LESS...SUSTAINED 20 FOOT WINDS OF 20 MPH OR GREATER...AND AN ELEVATED FIRE DANGER RATING WILL CREATE RED FLAG CONDITIONS. && $$ JACKSON FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE VISIT... HTTP://WWW.SRH.NOAA.GOV/AMA
930 WWUS84 KAMA 220203 RFWAMA URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE AMARILLO TX 903 PM CDT THU APR 21 2011 OKZ001-TXZ001-006-011-016-220315- /O.CAN.KAMA.FW.W.0021.000000T0000Z-110422T0200Z/ CIMARRON-DALLAM-HARTLEY-OLDHAM-DEAF SMITH- 903 PM CDT THU APR 21 2011 ...RED FLAG WARNING HAS BEEN ALLOWED TO EXPIRE FOR THE FAR WESTERN TEXAS AND OKLAHOMA PANHANDLES... THE NATIONAL WEATHER SERVICE IN AMARILLO HAS EXPIRED THE RED FLAG WARNING FOR THE FAR WESTERN TEXAS AND OKLAHOMA PANHANDLES. WINDS HAVE DIMINISHED BELOW CRITICAL LEVELS AND RELATIVE HUMIDITIES HAVE RISEN ABOVE CRITICAL LEVELS. $$ SCHNEIDER FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE VISIT... HTTP://WWW.SRH.NOAA.GOV/AMA
Nearby
Red Flag Warnings in Texas, 2011Red 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.