Alert archive / Colorado / Red Flag Warnings in 2012
Red Flag Warning 32, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Sep 9, 2012, 3:43 AM MDT for 10 counties in Colorado. It took effect at Sep 9, 2012, 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
- Sep 9, 2012, 3:43 AM MDT (09:43 UTC)
- In effect from
- Sep 9, 2012, 11:00 AM MDT
- Expired
- Sep 9, 2012, 7:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Elbert 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), 90 km from the middle of the area, began a volume at 09:45 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, 9.7 hours before the alert went out and 36 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
- 3577 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- -46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
967 WWUS85 KBOU 090943 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 343 AM MDT SUN SEP 9 2012 ...CRITICAL FIRE WEATHER CONDITIONS POSSIBLE ON SUNDAY FOR THE EASTERN PLAINS OF COLORADO... .A STRENGTHENING PRESSURE GRADIENT WILL INCREASE SOUTHERLY WINDS ACROSS THE PLAINS SUNDAY. HUMIDITIES NEAR 15 PERCENT COMBINING WITH THE GUSTY WINDS MAY RESULT IN CRITICAL FIRE WEATHER CONDITIONS INTO THE EARLY EVENING. COZ240-241-243-091045- /O.CAN.KBOU.FW.A.0014.120909T1700Z-120910T0100Z/ NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- CENTRAL AND SOUTH WELD COUNTY- 343 AM MDT SUN SEP 9 2012 ...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS ALONG AND EAST OF INTERSTATE 25... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE FIRE WEATHER WATCH. WINDS ARE EXPECTED TO REMAIN BELOW 25 MPH...THEREFORE THE FIRE WEATHER WATCH HAS BEEN CANCELLED. $$ COZ242-244>251-092200- /O.UPG.KBOU.FW.A.0014.120909T1700Z-120910T0100Z/ /O.NEW.KBOU.FW.W.0032.120909T1700Z-120910T0100Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 343 AM MDT SUN SEP 9 2012 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF EASTERN COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE WEATHER ZONES 242...244...245...246... 247...248...249...250 AND 251. * TIMING...LATE MORNING THROUGH EARLY SUNDAY EVENING * WINDS...SOUTH 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. * RELATIVE HUMIDITY...10-15 PERCENT. * IMPACTS...THE DRY AND BREEZY WEATHER CONDITIONS WILL COMBINE WITH DRY FUELS TO INCREASE THE POTENTIAL FOR RAPID FIRE GROWTH AND EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$
2 follow-up statements
992 WWUS85 KBOU 091644 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1044 AM MDT SUN SEP 9 2012 ...CRITICAL FIRE WEATHER CONDITIONS FOR THE EASTERN PLAINS OF COLORADO... .A STRENGTHENING PRESSURE GRADIENT WILL INCREASE SOUTHERLY WINDS ACROSS THE PLAINS BY EARLY AFTERNOON. LOW HUMIDITIES COMBINING WITH THE GUSTY WINDS WILL RESULT IN CRITICAL FIRE WEATHER CONDITIONS INTO THE EARLY EVENING. COZ242-244>251-100100- /O.CON.KBOU.FW.W.0032.120909T1700Z-120910T0100Z/ NORTHEAST 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- 1044 AM MDT SUN SEP 9 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF EASTERN COLORADO... * AFFECTED AREA...FIRE WEATHER ZONES 242...244...245...246... 247...248...249...250 AND 251. * TIMING...HUMIDITY WILL BEGIN TO RECOVER BY 7 PM THOUGH WINDS ARE EXPECTED TO REMAIN ELEVATED FOR A FEW HOURS LATER. * WINDS...SOUTH 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. * RELATIVE HUMIDITY...10-15 PERCENT. * IMPACTS...THE DRY AND BREEZY WEATHER CONDITIONS WILL COMBINE WITH DRY FUELS TO INCREASE THE POTENTIAL FOR RAPID FIRE GROWTH AND EXTREME FIRE BEHAVIOR. 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. && $$
631 WWUS85 KBOU 100058 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 658 PM MDT SUN SEP 9 2012 COZ242-244>251-100200- /O.EXP.KBOU.FW.W.0032.000000T0000Z-120910T0100Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 658 PM MDT SUN SEP 9 2012 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF EASTERN COLORADO... $$
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.