Alert archive / Wyoming / Red Flag Warnings in 2007
Red Flag Warning 13, NWS Riverton, WY
NWS Riverton, WY issued this red flag warning at Sep 28, 2007, 1:35 PM MDT for Fremont County, Natrona County, Sweetwater County, Wyoming. It was in force for 4 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 28, 2007, 1:35 PM MDT (19:35 UTC)
- Expired
- Sep 28, 2007, 6:00 PM MDT
- In force
- 4 hr
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Natrona County, WY, Sweetwater County, WY
The radar
The Riverton/Lander radar (KRIW), 65 km from the middle of the area, began a volume at 19:38 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
Riverton, WY (KRIW), launched 12:00Z, 7.6 hours before the alert went out and 62 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
- 2941 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS85 KRIW 281935 RFWRIW RED FLAG WARNING NATIONAL WEATHER SERVICE RIVERTON WY 135 PM MDT FRI SEP 28 2007 ...WINDY...WARM AND DRY CONDITIONS COUPLED WITH THE DRY VEGETATION WILL PRODUCE CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON... .WINDY...WARM AND DRY CONDITIONS COUPLED WITH THE DRY VEGETATION WILL PRODUCE CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON. WYZ280-289-290000- /O.NEW.KRIW.FW.W.0013.070928T1935Z-070929T0000Z/ NATRONA COUNTY / CASPER BLM- GRANITE / GREEN / FERRIS / RATTLESNAKE MOUNTAINS- 135 PM MDT FRI SEP 28 2007 ...RED FLAG WARNING IN EFFECT UNTIL 6 PM MDT THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 6 PM MDT THIS AFTERNOON. SOUTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO 40 MPH AND RELATIVE HUMIDITY IN THE LOWER TEENS WILL COMBINE WITH THE DRY VEGETATION TO CREATE CRITICAL FIRE WEATHER CONDITIONS. THE RELATIVE HUMIDITY WILL INCREASE AFTER 1800 WHICH WILL DECREASE THE CRITICAL FIRE WEATHER CONDITIONS AFTER THAT TIME. 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 CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. $$ LIPSON
1 follow-up statement
000 WWUS85 KRIW 282355 RFWRIW RED FLAG WARNING NATIONAL WEATHER SERVICE RIVERTON WY 555 PM MDT FRI SEP 28 2007 WYZ280-289-290100- /O.EXP.KRIW.FW.W.0013.000000T0000Z-070929T0000Z/ NATRONA COUNTY / CASPER BLM- GRANITE / GREEN / FERRIS / RATTLESNAKE MOUNTAINS- 555 PM MDT FRI SEP 28 2007 ...RED FLAG WARNING WILL EXPIRE AT 6 PM MDT THIS AFTERNOON... THE RED FLAG WARNING WILL EXPIRE AT 6 PM MDT THIS AFTERNOON. RELATIVE HUMIDITY IS NOW GENERALLY BETWEEN 15 AND 20 PERCENT ACROSS THE AREA...AND THE RELATIVE HUMIDITY IS EXPECTED TO GRADUALLY INCREASE DURING THE EVENING HOURS. THEREFORE...THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER...STRONG SOUTHWEST WINDS BETWEEN 15 AND 25 MPH...WITH GUSTS TO AROUND 30 MPH...ARE EXPECTED TO CONTINUE THROUGH EARLY EVENING. $$
Nearby
Red Flag Warnings in Wyoming, 2007Every red flag warning in 2007
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.