Alert archive / Colorado / Red Flag Warnings in 2007
Red Flag Warning 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Oct 20, 2007, 4:50 AM MDT for 4 counties in Colorado. It took effect at Oct 20, 2007, 11:00 AM 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
- Oct 20, 2007, 4:50 AM MDT (10:50 UTC)
- In effect from
- Oct 20, 2007, 11:00 AM MDT
- Expired
- Oct 20, 2007, 7:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Arapahoe County, CO, Douglas County, CO, Elbert County, CO, Lincoln County, CO
The radar
The Denver radar (KFTG), 59 km from the middle of the area, began a volume at 10:48 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, 10.8 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
- 15 J/kg
- Mixed-layer CIN
- -264 J/kg
- Mixed-layer LCL
- 2789 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS85 KBOU 201050 RFWBOU RED FLAG WARNING NATIONAL WEATHER SERVICE DENVER CO 450 AM MDT SAT OCT 20 2007 COZ241-246-247-201900- /O.UPG.KBOU.FW.A.0001.071020T1700Z-071021T0100Z/ /O.NEW.KBOU.FW.W.0002.071020T1700Z-071021T0100Z/ ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- INCLUDING...CASTLE ROCK...ELBERT...FONDIS...KIOWA...LARKSPUR... AGATE...HUGO...LIMON...MATHESON...FORDER...KARVAL...KUTCH... PUNKIN CENTER 450 AM MDT SAT OCT 20 2007 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING ACROSS THE PALMER DIVIDE FOR STRONG AND GUSTY SOUTHWEST WINDS AND VERY LOW HUMIDITY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING. THIS REPLACES THE FIRE WEATHER WATCH WHICH WAS PREVIOUSLY IN EFFECT. SOUTHWEST WINDS WILL INCREASE TO 20 TO 30 MPH GUSTS UP TO 40 MPH ACROSS DOUGLAS...ELBERT...AND LINCOLN COUNTIES BY LATE THIS MORNING. IN ADDITION...RELATIVE HUMIDITY READINGS WILL DROP INTO THE 10 TO 15 PERCENT RANGE. THIS WILL RESULT IN CRITICAL FIRE WEATHER CONDITIONS AS GRASSES ARE DRY AND CURED. 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. CONDITIONS WILL RAPIDLY IMPROVE THIS EVENING WITH THE PASSAGE OF A STRONG COLD FRONT. $$ BARJENBRUCH
1 follow-up statement
000 WWUS85 KBOU 210103 RFWBOU RED FLAG WARNING NATIONAL WEATHER SERVICE DENVER CO 703 PM MDT SAT OCT 20 2007 COZ241-246-247-210215- /O.EXP.KBOU.FW.W.0002.000000T0000Z-071021T0100Z/ ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- INCLUDING...CASTLE ROCK...ELBERT...FONDIS...KIOWA...LARKSPUR... AGATE...HUGO...LIMON...MATHESON...FORDER...KARVAL...KUTCH... PUNKIN CENTER 703 PM MDT SAT OCT 20 2007 ...RED FLAG WARNING HAS EXPIRED... THE RED FLAG WARNING IS NO LONGER IN EFFECT. $$ SWE
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 20, 4:14 PM MDT | Snow and Blowing Snow Advisory | BOU | Arapahoe, Douglas, Elbert | 7 hr |
| Oct 20, 4:14 PM MDT | Winter Storm Warning | BOU | Arapahoe, Boulder, Clear Creek, Douglas, Elbert, Gilpin and 6 more | 23 hr |
Nearby
Red Flag Warnings in Colorado, 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.