Alert archive / Wyoming / Red Flag Warnings in 2017
Red Flag Warning 2, NWS Riverton, WY
NWS Riverton, WY issued this red flag warning at Sep 2, 2017, 8:20 PM MDT for 7 counties in Wyoming. It took effect at Sep 3, 2017, 1:16 PM MDT. 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
- Sep 2, 2017, 8:20 PM MDT (02:20 UTC)
- In effect from
- Sep 3, 2017, 1:16 PM MDT
- Expired
- Sep 3, 2017, 9:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Johnson County, WY, Lincoln County, WY, Natrona County, WY, Sublette County, WY, Sweetwater County, WY, Uinta County, WY
The radar
The Riverton/Lander radar (KRIW), 63 km from the middle of the area, began a volume at 02:21 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
Riverton, WY (KRIW), launched 00:00Z, 2.3 hours before the alert went out and 67 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
- 7 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 3714 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
489 WWUS85 KRIW 030220 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 820 PM MDT Sat Sep 2 2017 WYZ277>279-414-030800- /O.UPG.KRIW.FW.A.0001.170903T2000Z-170904T0300Z/ /O.NEW.KRIW.FW.W.0002.170903T2000Z-170904T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Salt and Wyoming Ranges/West Zone Bridger Teton NF- 820 PM MDT Sat Sep 2 2017 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 9 PM MDT SUNDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 2 PM to 9 PM MDT Sunday. the Fire Weather Watch is no longer in effect. * IMPACTS: Low Humidities, Hot Temperatures, and Extreme Instability will create erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zones...278...414. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * HUMIDITY: As low as 9 percent. * TEMPERATURES: In the lower to mid 80s in the mountains...mid 80s to lower 90s across the lower elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions will occur. A combination of low relative humidity...very warm temperatures...and extreme instability will contribute to extreme fire behavior. && $$ WYZ280-283-289-300-030800- /O.UPG.KRIW.FW.A.0001.170903T2000Z-170904T0300Z/ /O.NEW.KRIW.FW.W.0002.170903T2000Z-170904T0300Z/ Natrona County/Casper BLM-Upper Wind River Basin/Wind River Basin- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 820 PM MDT Sat Sep 2 2017 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 9 PM MDT SUNDAY... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 2 PM to 9 PM MDT Sunday. the Fire Weather Watch is no longer in effect. * IMPACTS: Low Humidities, Hot Temperatures, and Extreme Instability will create erratic fire behavior. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...283...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * HUMIDITY: As low as 6 percent. * TEMPERATURES: In the lower to mid 80s in the mountains...upper 80s to upper 90s across the lower elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions will occur. A combination of low relative humidity...very warm temperatures...and extreme instability will contribute to extreme fire behavior. && $$ http://weather.gov/riverton
3 follow-up statements
011 WWUS85 KRIW 030604 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 1204 AM MDT Sun Sep 3 2017 WYZ277>279-414-032200- /O.CON.KRIW.FW.W.0002.170903T2000Z-170904T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Salt and Wyoming Ranges/West Zone Bridger Teton NF- 1204 AM MDT Sun Sep 3 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities, Hot Temperatures, and Extreme Instability will create erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zones...278...414. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * HUMIDITY: As low as 9 percent. * TEMPERATURES: In the lower to mid 80s in the mountains...mid 80s to lower 90s across the lower elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions will occur. A combination of low relative humidity...very warm temperatures...and extreme instability will contribute to extreme fire behavior. && $$ WYZ280-283-289-300-032200- /O.CON.KRIW.FW.W.0002.170903T2000Z-170904T0300Z/ Natrona County/Casper BLM-Upper Wind River Basin/Wind River Basin- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 1204 AM MDT Sun Sep 3 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities, Hot Temperatures, and Extreme Instability will create erratic fire behavior. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...283...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * HUMIDITY: As low as 6 percent. * TEMPERATURES: In the lower to mid 80s in the mountains...upper 80s to upper 90s across the lower elevations. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions will occur. A combination of low relative humidity...very warm temperatures...and extreme instability will contribute to extreme fire behavior. && $$ http://weather.gov/riverton
194 WWUS85 KRIW 031916 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 116 PM MDT Sun Sep 3 2017 WYZ281-040300- /O.EXB.KRIW.FW.W.0002.170903T1916Z-170904T0300Z/ Johnson County/Casper BLM- 116 PM MDT Sun Sep 3 2017 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING... The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect until 9 PM MDT this evening. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In North Central WY...Fire Weather Zone 281. * COUNTIES AFFECTED: In North Central WY...Johnson. * HUMIDITY: as low as 11 percent. * TEMPERATURES: In the mid 80s. * WIND: North 15 to 20 mph with gusts up to 30 mph. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Fires may spread rapidly. 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 can contribute to extreme fire behavior. && $$ WYZ277>279-414-040300- /O.EXT.KRIW.FW.W.0002.170903T1916Z-170904T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Salt and Wyoming Ranges/West Zone Bridger Teton NF- 116 PM MDT Sun Sep 3 2017 ...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...Gusty Winds and a very unstable air mass, haines index 6, will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zones...278...414. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * HUMIDITY: as low as 9 percent. * TEMPERATURES: In the upper 70s to mid 80s. * HAINES INDEX: 6. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Fires may spread rapidly. A Red Flag Warning means that critical fire weather conditions will occur. A combination of low relative humidity...very warm temperatures...and extreme instability will contribute to extreme fire behavior. && $$ WYZ280-283-289-300-040300- /O.EXT.KRIW.FW.W.0002.170903T1916Z-170904T0300Z/ Natrona County/Casper BLM-Upper Wind River Basin/Wind River Basin- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- 116 PM MDT Sun Sep 3 2017 ...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low Humidities...Hot Temperatures...Gusty Winds and a very unstable air mass, Haines Index 6, will create erratic fire behavior and new fire starts. * AFFECTED AREA: In Central WY...Fire Weather Zones 280...283...289 and 300. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * HUMIDITY: as low as 10 percent. * TEMPERATURES: In the mid 80s to mid 90s. * HAINES INDEX: 6. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Fires may spread rapidly. A Red Flag Warning means that critical fire weather conditions will occur. A combination of low relative humidity...very warm temperatures...and extreme instability will contribute to extreme fire behavior. && $$ http://weather.gov/riverton
113 WWUS85 KRIW 040308 RFWRIW URGENT - FIRE WEATHER MESSAGE National Weather Service Riverton WY 908 PM MDT Sun Sep 3 2017 WYZ277>281-283-289-300-414-040415- /O.EXP.KRIW.FW.W.0002.000000T0000Z-170904T0300Z/ Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Natrona County/Casper BLM-Johnson County/Casper BLM- Upper Wind River Basin/Wind River Basin- Granite/Green/Ferris/Rattlesnake Mountains-Casper Mountain- Salt and Wyoming Ranges/West Zone Bridger Teton NF- 908 PM MDT Sun Sep 3 2017 ...RED FLAG WARNING HAS EXPIRED... Red Flag conditions have ended over the area and thus the Red Flag Warning has been allowed to expire as of 900 PM MDT this evening. $$ http://weather.gov/riverton
Nearby
Red Flag Warnings in Wyoming, 2017Every red flag warning in 2017
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.