Alert archive / Colorado / Red Flag Warnings in 2012
Red Flag Warning 14, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at May 18, 2012, 4:05 AM MDT for 16 counties in Colorado. It took effect at May 18, 2012, 12:00 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
- May 18, 2012, 4:05 AM MDT (10:05 UTC)
- In effect from
- May 18, 2012, 12:00 PM MDT
- Expired
- May 18, 2012, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 42 km from the middle of the area, began a volume at 10:11 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, 10.1 hours before the alert went out and 80 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
- 3918 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
131 WWUS85 KBOU 181005 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 405 AM MDT FRI MAY 18 2012 COZ215-238>240-242-243-181115- /O.CAN.KBOU.FW.A.0006.120518T1800Z-120519T0200Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-NORTHEAST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY- 405 AM MDT FRI MAY 18 2012 ...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF NORTHEAST COLORADO AND NORTHERN FRONT RANGE FOOTHILLS... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE FIRE WEATHER WATCH. AT WILL BE DRY AND BREEZY AT TIMES TODAY...HOWEVER FREQUENT WIND GUSTS GREATER THAN 25 MPH COMBINED WITH RELATIVE HUMIDITIES BELOW 15 PERCENT ARE NOT EXPECT TO LAST LONGER THAN 3 HOURS. THEREFORE THE FIRE WEATHER HAS BEEN CANCEL. ISOLATED SHOWERS AND THUNDERSTORM ARE EXPECTED THIS AFTERNOON. THEY WILL PRODUCE GUSTY OUTFLOW WINDS UP TO 50 MPH. WHERE IT DOES RAIN...RAINFALL WILL LIGHT. $$ COZ241-244>251-182100- /O.UPG.KBOU.FW.A.0006.120518T1800Z-120519T0200Z/ /O.NEW.KBOU.FW.W.0014.120518T1800Z-120519T0200Z/ ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 405 AM MDT FRI MAY 18 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND THE PLAINS OF NORTHEAST COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE WEATHER ZONES 241...244...245...246... 247...248...249...250 AND 251. * TIMING...THE HUMIDITIES WILL DECREASE SIGNIFICANTLY DURING THE AFTERNOON. SOUTH-SOUTHWESTERLY WINDS WILL PICK UP AFTER 12 NOON MDT. * WINDS...SOUTH 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. * RELATIVE HUMIDITY...WILL RANGE FROM 7 TO 14 PERCENT. * THUNDERSTORMS...ISOLATED SHOWERS AND THUNDERSTORMS WILL FORM THIS AFTERNOON. MOST OF THEM WILL BE DRY AND PRODUCE WIND GUSTS UP TO 50 MPH. * IMPACTS...THE STRONG WINDS...LOW HUMIDITIES...AND ISOLATED DRY THUNDERSTORMS COULD CAUSE RAPID SPREAD OF WILDFIRES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$
2 follow-up statements
424 WWUS85 KBOU 182023 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 223 PM MDT FRI MAY 18 2012 COZ215-238>240-242-243-190200- /O.EXA.KBOU.FW.W.0014.000000T0000Z-120519T0200Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-NORTHEAST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY- 223 PM MDT FRI MAY 18 2012 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY HAS BEEN EXPANDED TO COVER ALL OF THE PLAINS OF NORTHEAST AND EAST CENTRAL COLORADO AND THE NORTHERN FRONT RANGE FOOTHILLS... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT UNTIL 8 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONES 215...238...239...240... 242 AND 243. * TIMING...CRITICAL FIRE WEATHER CONDITIONS CAN BE EXPECTED THROUGH EARLY EVENING. WINDS WILL DECREASE A BIT BY 8 PM WITH SLIGHTLY HIGHER HUMIDITY LEVELS. WINDS WILL THEN SHIFT NORTHERLY WITH MUCH HIGHER HUMIDITIES LATE IN THE EVENING. * WINDS...SOUTHWEST 15 TO 25 MPH WITH GUSTS AROUND 30 MPH. SOME GUSTS UP TO 50 MPH WILL BE POSSIBLE NEAR SHOWERS AND STORMS. * RELATIVE HUMIDITY...AS LOW AS 11 PERCENT. * THUNDERSTORMS...ISOLATED SHOWERS AND THUNDERSTORMS WILL FORM THIS AFTERNOON. MOST OF THEM WILL BE DRY AND PRODUCE ERRATIC WIND GUSTS UP TO 50 MPH. * IMPACTS...THE STRONG WINDS...LOW HUMIDITIES...AND ISOLATED DRY THUNDERSTORMS COULD CAUSE RAPID SPREAD OF 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. && $$ COZ241-244>251-190200- /O.CON.KBOU.FW.W.0014.000000T0000Z-120519T0200Z/ ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 223 PM MDT FRI MAY 18 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND THE PLAINS OF NORTHEAST COLORADO... * AFFECTED AREA...FIRE WEATHER ZONES 241...244...245...246... 247...248...249...250 AND 251. * TIMING...CRITICAL FIRE WEATHER CONDITIONS CAN BE EXPECTED THROUGH EARLY EVENING. WINDS WILL DECREASE A BIT BY 8 PM WITH SLIGHTLY HIGHER HUMIDITY LEVELS. * WINDS...SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 9 PERCENT. * THUNDERSTORMS...ISOLATED SHOWERS AND THUNDERSTORMS WILL FORM THIS AFTERNOON. MOST OF THEM WILL BE DRY AND PRODUCE ERRATIC WIND GUSTS UP TO 50 MPH. * IMPACTS...THE STRONG WINDS...LOW HUMIDITIES...AND ISOLATED DRY THUNDERSTORMS COULD CAUSE RAPID SPREAD OF WILDFIRES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$
742 WWUS85 KBOU 190204 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 804 PM MDT FRI MAY 18 2012 COZ215-238>251-190315- /O.EXP.KBOU.FW.W.0014.000000T0000Z-120519T0200Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 804 PM MDT FRI MAY 18 2012 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEAST PLAINS AND NORTHERN FRONT RANGE FOOTHILLS... WINDS WERE DECREASING AND HUMIDITIES WERE INCREASING ACROSS MOST OF THE REGION THIS EVENING. WINDS WILL SHIFT MORE NORTHERLY LATE THIS EVENING ALLOWING COOLER TEMPERATURES AND ADDITIONAL MOISTURE TO RETURN TO NORTHEAST AND NORTH CENTRAL COLORADO. $$
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.