Alert archive / Colorado / Red Flag Warnings in 2012
Red Flag Warning 9, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Apr 7, 2012, 1:49 AM MDT for 5 counties in Colorado. It took effect at Apr 7, 2012, 10:00 AM MDT. It was in force for 5 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 7, 2012, 1:49 AM MDT (07:49 UTC)
- In effect from
- Apr 7, 2012, 10:00 AM MDT
- Expired
- Apr 7, 2012, 3:18 PM MDT
- In force
- 5 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 150 km from the middle of the area, began a volume at 07:51 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
Denver, CO (KDNR), launched 00:00Z, 7.8 hours before the alert went out and 76 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
- 5117 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
388 WWUS85 KBOU 070749 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 149 AM MDT SAT APR 7 2012 COZ242-248>251-071800- /O.NEW.KBOU.FW.W.0009.120407T1600Z-120407T2200Z/ NORTHEAST WELD COUNTY-LOGAN COUNTY-WASHINGTON COUNTY- SEDGWICK COUNTY-PHILLIPS COUNTY- 149 AM MDT SAT APR 7 2012 ...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 4 PM MDT THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEASTERN CORNER OF COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 10 AM THIS MORNING TO 4 PM MDT THIS AFTERNOON. * AFFECTED AREA...FIRE WEATHER ZONES 242...248...249...250 AND 251. * TIMING...NORTHWEST WINDS WILL INCREASE AGAIN BY MID MORNING AND REMAIN GUSTY INTO EARLY AFTERNOON. THE WINDS WILL THEN GRADUALLY DECREASE DURING THE MID AND LATE AFTERNOON HOURS. * WINDS...NORTHWEST 20 TO 25 MPH WITH GUSTS AROUND 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 9 PERCENT. * IMPACTS...THE GUSTY WINDS AND VERY LOW HUMIDITY WILL ALLOW RAPID SPREAD OF ANY GRASSLAND WILDFIRES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ BARJENBRUCH
1 follow-up statement
021 WWUS85 KBOU 072118 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 318 PM MDT SAT APR 7 2012 COZ242-248>251-072230- /O.CAN.KBOU.FW.W.0009.000000T0000Z-120407T2200Z/ NORTHEAST WELD COUNTY-LOGAN COUNTY-WASHINGTON COUNTY- SEDGWICK COUNTY-PHILLIPS COUNTY- 318 PM MDT SAT APR 7 2012 ...RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY FOR ZONES 242...248...249...250...251 IS CANCELLED. THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE RED FLAG WARNING. WINDS OVER THE NORTHEAST CORNER OF COLORADO HAVE DECREASED AND WILL CONTINUE TO DECREASE THROUGH THE REMAINDER OF THE AFTERNOON. RELATIVE HUMIDITIES STILL REMAIN BELOW 20 PERCENT IN MANY PLACES SO ELEVATED FIRE DANGER WILL CONTINUE UNTIL TEMPERATURES COOL DURING THE EVENING. $$
Nearby
Red Flag Warnings in Colorado, 2012Every red flag warning in 2012
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.