Alert archive / Colorado / Red Flag Warnings in 2023
Red Flag Warning 6, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 29, 2023, 3:07 PM MDT for 12 counties in Colorado. It took effect at Mar 31, 2023, 12:00 PM MDT. It was in force for 7 hr. 60 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 29, 2023, 3:07 PM MDT (21:07 UTC)
- In effect from
- Mar 31, 2023, 12:00 PM MDT
- Expired
- Mar 31, 2023, 6:55 PM MDT
- In force
- 7 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Lincoln County, CO, Park County, CO
The radar
The Denver radar (KFTG), 36 km from the middle of the area, began a volume at 21:05 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 31, 12:00 PM MDT | NON-TSTM WND GST 55 | 3 Nnw Louviers, CO | MESONET STATION AT112 LITTLETON. |
| Mar 31, 12:00 PM MDT | NON-TSTM WND GST 57 | 3 Se Niwot, CO | MESONET STATION FW3675 LAFAYETTE. |
| Mar 31, 12:02 PM MDT | NON-TSTM WND GST 51 | 3 S Cedar Point, CO | MESONET STATION CO066 CEDAR POINT. |
| Mar 31, 12:02 PM MDT | NON-TSTM WND GST 55 | 1 Nnw Greenland, CO | MESONET STATION CO192 GREENLAND 1 NW. |
| Mar 31, 12:10 PM MDT | DUST STORM | 3 Ese Niwot, CO | MOTORISTS REPORTED DUSTSTORM ON HIGHWAY 287 SOUTH OF LONGMONT, NEAR INTERSECTION WITH HIGHWAY 52. |
| Mar 31, 12:12 PM MDT | NON-TSTM WND GST 57 | 2 Ssw Broomfield, CO | MESONET STATION CO168 WESTMINSTER US 36. |
| Mar 31, 12:15 PM MDT | NON-TSTM WND GST 52 | 1 E Limon, CO | ASOS STATION KLIC LIMON. |
| Mar 31, 12:15 PM MDT | NON-TSTM WND GST 52 | 1 Wsw Lafayette, CO | MESONET STATION AV313 LAFAYETTE. |
| Mar 31, 12:15 PM MDT | NON-TSTM WND GST 61 | 3 Sse Superior, CO | MESONET STATION GW2489 BROOMFIELD. |
| Mar 31, 12:20 PM MDT | NON-TSTM WND GST 53 | 8 Nnw Boyero, CO | MESONET STATION UP711 7.7 NW BOYERO (UPR). |
| Mar 31, 12:30 PM MDT | NON-TSTM WND GST 57 | 3 Nne Arvada, CO | MESONET STATION AT266 WESTMINSTER. |
| Mar 31, 12:30 PM MDT | NON-TSTM WND GST 73 | 3 Se Niwot, CO | MESONET STATION FW3675 LAFAYETTE. |
| Mar 31, 12:32 PM MDT | NON-TSTM WND GST 60 | 3 S Cedar Point, CO | MESONET STATION CO066 CEDAR POINT. |
| Mar 31, 12:36 PM MDT | NON-TSTM WND GST 53 | 3 E Mountain View, CO | MESONET STATION CO220 070E27305RWS1RHS AT N PECOS ST. |
| Mar 31, 12:42 PM MDT | NON-TSTM WND GST 53 | Downieville, CO | MESONET STATION CO141 DOWNIEVILLE. |
| Mar 31, 12:44 PM MDT | NON-TSTM WND GST 52 | 1 Ne Aspen Springs, CO | MESONET STATION FW0549 BLACK HAWK. |
| Mar 31, 12:45 PM MDT | NON-TSTM WND GST 50 | Hugo, CO | MESONET STATION EW0539 HUGO. |
| Mar 31, 12:45 PM MDT | NON-TSTM WND GST 56 | 2 Nne Rocky Flats, CO | MESONET STATION RFN 2 NE ROCKY FLATS. |
| Mar 31, 12:46 PM MDT | NON-TSTM WND GST 51 | 2 S Longmont, CO | MESONET STATION EW1488 LONGMONT. |
| Mar 31, 12:47 PM MDT | NON-TSTM WND GST 60 | 3 N Denver, CO | MESONET STATION CO217 DENVER I-70/PECOS. |
| Mar 31, 12:50 PM MDT | HIGH SUST WINDS 42 | 2 Wsw Federal Heights, CO | PEAK GUST 56 MPH. |
| Mar 31, 12:53 PM MDT | NON-TSTM WND GST 54 | 1 Sse Dumont, CO | MESONET STATION CO189 I-70 DUMONT. |
| Mar 31, 12:53 PM MDT | NON-TSTM WND GST 54 | 2 Ssw Boulder, CO | MESONET STATION CO040 BOULDER US 36/BASELINE RD. |
| Mar 31, 12:54 PM MDT | NON-TSTM WND GST 58 | 3 Ssw Rocky Flats, CO | MESONET STATION FW2847 ARVADA. |
| Mar 31, 12:55 PM MDT | NON-TSTM WND GST 59 | Aspen Springs, CO | MESONET STATION CW5066 ASPEN SPRINGS. |
| Mar 31, 12:55 PM MDT | NON-TSTM WND GST 66 | 1 S Hygiene, CO | AWOS STATION KLMO LONGMONT AIRPORT. |
| Mar 31, 12:55 PM MDT | NON-TSTM WND GST 70 | 3 Se Tolland, CO | AWOS STATION KC99 DAKOTA HILL. |
| Mar 31, 1:03 PM MDT | NON-TSTM WND GST 54 | 1 Nne Wheat Ridge, CO | MESONET STATION CO146 WHEAT RIDGE I-70/KIPLING. |
| Mar 31, 1:03 PM MDT | NON-TSTM WND GST 57 | 2 Se Federal Heights, CO | MESONET STATION CO178 THORNTON I-25/84TH AVE. |
| Mar 31, 1:03 PM MDT | NON-TSTM WND GST 57 | 2 Ssw Denver, CO | MESONET STATION CO148 DENVER I-25/ALAMEDA. |
| Mar 31, 1:06 PM MDT | NON-TSTM WND GST 50 | 1 Ne Aspen Springs, CO | MESONET STATION DW4381 BLACK HAWK. |
| Mar 31, 1:13 PM MDT | NON-TSTM WND GST 52 | 2 Sw Denver, CO | MESONET STATION CO173 DENVER I-25/6TH AVENUE. |
| Mar 31, 1:13 PM MDT | NON-TSTM WND GST 64 | 1 Wsw Pleasant View, CO | MESONET STATION CO008 I-70 AT C470. |
| Mar 31, 1:15 PM MDT | NON-TSTM WND GST 52 | 3 Nw Boulder, CO | MESONET STATION BLD02 BOULDER NORTH WEST. |
| Mar 31, 1:15 PM MDT | NON-TSTM WND GST 53 | 3 N Denver, CO | MESONET STATION CO210 DENVER I-70/WASHINGTON. |
| Mar 31, 1:15 PM MDT | NON-TSTM WND GST 56 | 3 Nne Denver, CO | MESONET STATION CO209 I-70/BRIGHTON BLVD. |
| Mar 31, 1:15 PM MDT | NON-TSTM WND GST 61 | 3 N Denver, CO | MESONET STATION CO212 070E27400RWS1GOR AT WASHINGTON S. |
| Mar 31, 1:15 PM MDT | NON-TSTM WND GST 63 | 3 Sw Commerce City, CO | MESONET STATION CO207 DENVER I-70/YORK ST. |
| Mar 31, 1:16 PM MDT | NON-TSTM WND GST 55 | 3 N Denver, CO | MESONET STATION CO144 DENVER I-25/51ST AVE. |
| Mar 31, 1:20 PM MDT | NON-TSTM WND GST 79 | 3 Nw Marshall, CO | NCAR MESA LAB. |
| Mar 31, 1:23 PM MDT | NON-TSTM WND GST 53 | 1 Nne Lone Tree, CO | MESONET STATION CO001 I-25 AND C470. |
| Mar 31, 1:23 PM MDT | NON-TSTM WND GST 53 | 2 S Cheesman Reservoir, CO | MESONET STATION CHRC2 CHEESMAN. |
| Mar 31, 1:23 PM MDT | NON-TSTM WND GST 53 | 5 N Northglenn, CO | MESONET STATION CO156 THORNTON I-25/NORTHWEST PKWY. |
| Mar 31, 1:23 PM MDT | NON-TSTM WND GST 67 | 3 Ne Englewood, CO | MESONET STATION CO145 DENVER I-25/UNIVERSITY BLVD. |
| Mar 31, 1:24 PM MDT | NON-TSTM WND GST 63 | 1 S Greenland, CO | MESONET STATION CO193 GREENLAND. |
| Mar 31, 1:25 PM MDT | NON-TSTM WND GST 56 | 1 S Crescent Village, CO | MESONET STATION DVI03013 CRESCENT VILLAGE. |
| Mar 31, 1:26 PM MDT | NON-TSTM WND GST 55 | 3 Ssw Commerce City, CO | MESONET STATION CO205 DENVER I-70/COLORADO. |
| Mar 31, 1:27 PM MDT | NON-TSTM WND GST 55 | 3 Nne Denver, CO | MESONET STATION CO216 DENVER I-70/WASHINGTON. |
| Mar 31, 1:27 PM MDT | NON-TSTM WND GST 57 | 3 N Denver, CO | MESONET STATION CO213 DENVER I-70/I-25. |
| Mar 31, 1:30 PM MDT | NON-TSTM WND GST 52 | 2 Nw Ken Caryl, CO | MESONET STATION FW6582 LITTLETON. |
| Mar 31, 1:30 PM MDT | NON-TSTM WND GST 57 | 1 Ne Ken Caryl, CO | MESONET STATION FW5793 LITTLETON. |
| Mar 31, 1:31 PM MDT | NON-TSTM WND GST 72 | 3 Ne Boulder, CO | MESONET STATION DW0417 BOULDER. |
| Mar 31, 1:33 PM MDT | NON-TSTM WND GST 53 | 3 N Denver, CO | MESONET STATION CO169 DENVER I-70/I-25. |
| Mar 31, 1:33 PM MDT | NON-TSTM WND GST 57 | 1 Ssw Centennial, CO | MESONET STATION CO151 DRY CREEK. |
| Mar 31, 1:34 PM MDT | NON-TSTM WND GST 53 | 3 Ssw Commerce City, CO | MESONET STATION CO003 DENVER I-70/COLORADO BLVD. |
| Mar 31, 1:35 PM MDT | NON-TSTM WND GST 54 | 2 Sse Centennial, CO | ASOS STATION KAPA CENTENNIAL AIRPORT. |
| Mar 31, 1:35 PM MDT | NON-TSTM WND GST 56 | 3 E Sunshine, CO | MESONET STATION DVI08846 BOULDER. |
| Mar 31, 1:35 PM MDT | NON-TSTM WND GST 59 | 5 Nnw Buckley Afb, CO | MESONET STATION CO221 AURORA I-70/AIRPORT BLVD. |
| Mar 31, 1:35 PM MDT | NON-TSTM WND GST 61 | 1 Nnw Boulder, CO | MESONET STATION FW9328 BOULDER. |
| Mar 31, 1:36 PM MDT | NON-TSTM WND GST 51 | 3 Sse Commerce City, CO | MESONET STATION CO200 DENVER I-70/I-270. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 9.1 hours before the alert went out and 315 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
- 2689 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 260 m²/s²
- 0-3 km storm-relative helicity
- 319 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
155 WWUS85 KBOU 292107 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 307 PM MDT Wed Mar 29 2023 COZ240-241-246-247-301200- /O.NEW.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ /O.CON.KBOU.FW.W.0005.230330T1700Z-230331T0200Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- 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- 307 PM MDT Wed Mar 29 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND MOST OF THE DENVER METRO AREA...FIRE WEATHER ZONES 240...241...246...AND 247... ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND ALL OF THE DENVER METRO AREA...FIRE WEATHER ZONES 239 THROUGH 241...246...AND 247... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 7 PM MDT Friday. A Red Flag Warning remains in effect for Thursday from 11 AM to 8 PM. * Affected Area...Fire Weather Zones 240, 241, 246 and 247. * Timing...11 AM to 8 PM MDT Thursday and Noon to 7 PM MDT Friday * Winds...Southwest 25 to 35 mph with gusts up to 55 mph Thursday. Similar speeds from the northwest on Friday. * Relative Humidity...As low as 10 percent Thursday and 15 percent on Friday. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ239-301200- /O.NEW.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 307 PM MDT Wed Mar 29 2023 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET...FIRE WEATHER ZONE 239... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 7 PM MDT Friday. * Affected Area...Fire Weather Zone 239. * Timing...Noon to 7 PM MDT Friday. * Winds...West 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 17 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Gimmestad/Barjenbruch
11 follow-up statements
709 WWUS85 KBOU 300226 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 826 PM MDT Wed Mar 29 2023 COZ240-241-246-247-301800- /O.CON.KBOU.FW.W.0005.230330T1700Z-230331T0200Z/ /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- 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- 826 PM MDT Wed Mar 29 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND MOST OF THE DENVER METRO AREA...FIRE WEATHER ZONES 240... 241...246...AND 247... ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND MOST OF THE DENVER METRO AREA...FIRE WEATHER ZONES 240... 241...246...AND 247... * Affected Area...Fire Weather Zones 240, 241, 246 and 247. * Timing...11 AM to 8 PM MDT Thursday and Noon to 7 PM MDT Friday * Winds...West 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 10 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ239-301800- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 826 PM MDT Wed Mar 29 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET...FIRE WEATHER ZONE 239... * Affected Area...Fire Weather Zone 239. * Timing...Noon to 7 PM MDT Friday. * Winds...West 30 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 17 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
000 WWUS85 KBOU 301001 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 401 AM MDT Thu Mar 30 2023 COZ240-241-246-247-301815- /O.CON.KBOU.FW.W.0005.230330T1700Z-230331T0200Z/ /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- 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- 401 AM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST...FIRE WEATHER ZONES 240...241...246...AND 247... ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST... FIRE WEATHER ZONES 240...241...246...AND 247... * Affected Area...Fire Weather Zones 240, 241, 246 and 247. * Timing...11 AM to 8 PM MDT Thursday and Noon to 7 PM MDT Friday * Winds...West 25 to 35 mph with gusts up to 50 mph. * Relative Humidity...As low as 8 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ239-301815- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 401 AM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF BOULDER AND JEFFERSON COUNTIES...FIRE WEATHER ZONE 239... * Affected Area...Fire Weather Zone 239. * Timing...Noon to 7 PM MDT Friday. * Winds...Northwest 30 to 40 mph with gusts up to 55 mph. * Relative Humidity...15 to 20 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
114 WWUS85 KBOU 301012 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 412 AM MDT Thu Mar 30 2023 COZ240-241-246-247-302100- /O.CON.KBOU.FW.W.0005.230330T1700Z-230331T0200Z/ /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- 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- 412 AM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST...FIRE WEATHER ZONES 240...241...246...AND 247... ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST... FIRE WEATHER ZONES 240...241...246...AND 247... * Affected Area...Fire Weather Zones 240, 241, 246 and 247. * Timing...11 AM to 8 PM MDT Thursday and Noon to 7 PM MDT Friday * Winds...West 25 to 35 mph with gusts up to 50 mph. * Relative Humidity...As low as 10 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ239-302100- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 412 AM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF BOULDER AND JEFFERSON COUNTIES...FIRE WEATHER ZONE 239... * Affected Area...Fire Weather Zone 239. * Timing...Noon to 7 PM MDT Friday. * Winds...Northwest 30 to 40 mph with gusts up to 55 mph. * Relative Humidity...15 to 20 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
689 WWUS85 KBOU 301814 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1214 PM MDT Thu Mar 30 2023 ...TWO CONSECUTIVE DAYS OF CRITICAL FIRE WEATHER CONDITIONS... .Strong southwest winds have developed this afternoon from Park County eastward across the Palmer Divide area, most of Denver, and some of the adjacent plains. The winds, in combination of drying fuels and very low humidity will create critical fire weather conditions that will last into this evening. Another round of strong, gusty winds can be expected on Friday. This time, those winds will be from the northwest ushering in cooler temperatures. However, the airmass will remain quite dry in the lower elevations so critical fire weather conditions can again be expected in areas that haven't seen appreciable snowfall lately. COZ240-241-246-247-310215- /O.CON.KBOU.FW.W.0005.000000T0000Z-230331T0200Z/ /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- 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- 1214 PM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST...FIRE WEATHER ZONES 240...241...246...AND 247... ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST... FIRE WEATHER ZONES 240...241...246...AND 247... * Affected Area...Fire Weather Zones 240, 241, 246 and 247. * Timing...11 AM to 8 PM MDT Thursday and Noon to 7 PM MDT Friday * Winds...Southwest 25 to 35 mph with gusts around 50 mph today. Northwest winds 20 to 30 mph with gusts around 45 mph Friday. * Relative Humidity...As low as 10 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ239-310215- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 1214 PM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF BOULDER AND JEFFERSON COUNTIES...FIRE WEATHER ZONE 239... * Affected Area...Fire Weather Zone 239. * Timing...Noon to 7 PM MDT Friday. * Winds...Northwest 30 to 40 mph with gusts up to 60 mph. * Relative Humidity...As low as 18 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
614 WWUS85 KBOU 301831 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1231 PM MDT Thu Mar 30 2023 ...TWO CONSECUTIVE DAYS OF CRITICAL FIRE WEATHER CONDITIONS... .Strong southwest winds have developed this afternoon from Park County eastward across the Palmer Divide area, most of Denver, and some of the adjacent plains. The winds, in combination of drying fuels and very low humidity will create critical fire weather conditions that will last into this evening. Another round of strong, gusty winds can be expected on Friday. This time, those winds will be from the northwest ushering in cooler temperatures. However, the airmass will remain quite dry in the lower elevations so critical fire weather conditions can again be expected in areas that haven't seen appreciable snowfall lately. COZ214-310200- /O.EXA.KBOU.FW.W.0005.000000T0000Z-230331T0200Z/ Central and Southeast Park County- 1231 PM MDT Thu Mar 30 2023 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK...FIRE WEATHER ZONE 214... 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 Zone 214. * Timing...Until 8 pm this evening. * Winds...Southwest 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 16 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ240-241-246-247-310245- /O.CON.KBOU.FW.W.0005.000000T0000Z-230331T0200Z/ /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 1231 PM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST...FIRE WEATHER ZONES 240...241...246...AND 247... ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST... FIRE WEATHER ZONES 240...241...246...AND 247... * Affected Area...Fire Weather Zones 240, 241, 246 and 247. * Timing...Until 8 PM MDT this evening, and Noon to 7 PM MDT Friday * Winds...Southwest 25 to 35 mph with gusts around 50 mph today. Northwest winds 20 to 30 mph with gusts around 45 mph Friday. * Relative Humidity...As low as 10 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ239-310245- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 1231 PM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF BOULDER AND JEFFERSON COUNTIES...FIRE WEATHER ZONE 239... * Affected Area...Fire Weather Zone 239. * Timing...Noon to 7 PM MDT Friday. * Winds...Northwest 30 to 40 mph with gusts up to 60 mph. * Relative Humidity...As low as 20 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$
737 WWUS85 KBOU 302103 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 303 PM MDT Thu Mar 30 2023 ...TWO CONSECUTIVE DAYS OF CRITICAL FIRE WEATHER CONDITIONS... .Strong southwest winds from Park County eastward across the Palmer Divide area, most of Denver, and the adjacent plains will gradually weaken this evening. Until then, the winds in combination of drying fuels and very low humidity will create critical fire weather conditions. Another round of strong, gusty winds can be expected on Friday. This time, those winds will be from the northwest ushering in cooler temperatures. However, the airmass will remain quite dry in the lower elevations so critical fire weather conditions can again be expected in areas that haven't seen appreciable snowfall lately. This also includes South Park, which has been expanded into the Red Flag Warning for Friday. COZ214-310515- /O.EXA.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ /O.CON.KBOU.FW.W.0005.000000T0000Z-230331T0200Z/ Central and Southeast Park County- 303 PM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK...FIRE WEATHER ZONE 214... ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK...FIRE WEATHER ZONE 214... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 7 PM MDT Friday. * Affected Area...Fire Weather Zone 214. * Timing...Until 8 PM MDT this evening, and Noon to 7 PM MDT Friday * Winds..Southwest 25 to 35 mph with gusts up to 55 mph today. On Friday, northwest winds 25 to 35 mph with gusts up to 50 mph. * Relative Humidity...As low as 18 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ240-241-246-247-310515- /O.CON.KBOU.FW.W.0005.000000T0000Z-230331T0200Z/ /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- 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- 303 PM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST...FIRE WEATHER ZONES 240...241...246...AND 247... ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF THE DENVER METRO AREA, PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST... FIRE WEATHER ZONES 240...241...246...AND 247... * Affected Area...Fire Weather Zones 240, 241, 246 and 247. * Timing...Until 8 PM MDT this evening, and Noon to 7 PM MDT Friday * Winds...Southwest 25 to 35 mph with gusts up to 50 mph today. On Friday, northwest 25 to 35 mph with gusts up to 50 mph. * Relative Humidity...9 to 15 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ239-310515- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 303 PM MDT Thu Mar 30 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF BOULDER AND JEFFERSON COUNTIES...FIRE WEATHER ZONE 239... * Affected Area...Fire Weather Zone 239. * Timing...Noon to 7 PM MDT Friday. * Winds...Northwest 30 to 40 mph with gusts up to 60 mph. * Relative Humidity...As low as 18 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
697 WWUS85 KBOU 310645 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1245 AM MDT Fri Mar 31 2023 ...ANOTHER DAY OF CRITICAL FIRE WEATHER CONDITIONS... Another round of strong and gusty winds, this time from the northwest. The airmass will remain quite dry in spite of cooler temperatures and the warning areas haven't seen appreciable snowfall lately. COZ214-239>241-246-247-311445- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Central and Southeast Park 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- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 1245 AM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF THE DENVER METRO AREA, THE PLAINS OF BOULDER AND JEFFERSON COUNTIES, SOUTH PARK, AND THE PALMER DIVIDE AND ADJACENT PLAINS SOUTH AND EAST... FIRE WEATHER ZONES 214...239...240...241...246...AND 247... * Affected Area...Fire Weather Zones 214, 239, 240, 241, 246 and 247. * Timing...Until 8 PM MDT this evening, and Noon to 7 PM MDT Friday * Winds...Northwest 25 to 40 mph with gusts up to 60 mph. * Relative Humidity...As low as 10 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$
405 WWUS85 KBOU 310932 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 332 AM MDT Fri Mar 31 2023 ...ANOTHER DAY OF CRITICAL FIRE WEATHER CONDITIONS... Another round of strong and gusty winds, this time from the northwest. The airmass will remain quite dry in spite of cooler temperatures and the warning areas haven't seen appreciable snowfall lately. COZ241-246-247-312100- /O.NEW.KBOU.FW.A.0004.230401T1800Z-230402T0100Z/ /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ 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- 332 AM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR AND THE PALMER DIVIDE...FIRE WEATHER ZONES ...241...246...AND 247... ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PALMER DIVIDE... FIRE WEATHER ZONES 241...246...AND 247... The National Weather Service in Denver has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Saturday afternoon through Saturday evening. * Affected Area...Fire Weather Zones 241, 246 and 247. * Timing...Noon today until 7 PM MDT this evening, and Noon to 7 PM MDT Saturday * Winds...West 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 11 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ214-239-240-312100- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Central and Southeast Park 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- 332 AM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF THE DENVER METRO AREA, THE PLAINS OF BOULDER AND JEFFERSON COUNTIES, and SOUTH PARK...FIRE WEATHER ZONES 214...239...240... * Affected Area...Fire Weather Zones 214, 239 and 240. * Timing...Noon to 7 PM * Winds...West 25 to 35 mph with gusts up to 60 mph. * Relative Humidity...As low as 15 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$
574 WWUS85 KBOU 311505 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 905 AM MDT Fri Mar 31 2023 ...ANOTHER DAY OF CRITICAL FIRE WEATHER CONDITIONS... Another round of strong and gusty winds will occur today, this time from the northwest. The airmass will remain quite dry in spite of cooler temperatures. The Red Flag Warning will be in effect for areas that haven't seen appreciable snowfall lately, and has been expanded to include the southern Front Range Foothills where south and west facing slopes will be prone to fire spread. COZ216-312315- /O.EXA.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 905 AM MDT Fri Mar 31 2023 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS...FIRE WEATHER ZONE 216... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 7 PM MDT this evening. * Affected Area...Fire Weather Zone 216. * Timing...Noon until 7 PM MDT this evening. * Winds...West 25 to 40 mph with gusts up to 55 mph. * Relative Humidity...As low as 15 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ241-246-247-312315- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ /O.CON.KBOU.FW.A.0004.230401T1800Z-230402T0100Z/ 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- 905 AM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE...FIRE WEATHER ZONES...241...246...AND 247... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE...FIRE WEATHER ZONES 241...246...AND 247... * Affected Area...Fire Weather Zones 241, 246 and 247. * Timing...Noon today until 7 PM MDT this evening, and Noon to 7 PM MDT Saturday. * Winds...Northwest 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 11 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ214-239-240-312315- /O.CON.KBOU.FW.W.0006.230331T1800Z-230401T0100Z/ Central and Southeast Park County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- 905 AM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE ENTIRE DENVER AND BOULDER METRO AREAS, AND SOUTH PARK...FIRE WEATHER ZONES 214...239...240... * Affected Area...Fire Weather Zones 214, 239 and 240. * Timing...Noon to 7 PM * Winds...West 25 to 35 mph with gusts up to 60 mph. * Relative Humidity...As low as 15 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
242 WWUS85 KBOU 312051 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 251 PM MDT Fri Mar 31 2023 ...REPEATED DAYS OF CRITICAL FIRE WEATHER CONDITIONS... Very strong and gusty west to northwest winds that we observed today will gradually diminish early this evening. However, only moderate humidity recovery will occur overnight. On Saturday, we'll turn warmer which means somewhat lower humidity readings. Fortunately winds will be lighter, but at the same time still reach Red Flag Criteria over the southern portions of our forecast area from Park County eastward across the Palmer Divide. Winds gusting to 25 to 30 mph will coincide with minimum humidity values of 10 to 16 percent. Sunday will feature increasing winds and even warmer temperatures, so more widespread critical fire weather conditions can be expected then. Monday should finally start a cooldown, but southern portions around Park County and adjacent areas toward the Palmer Divide could still stay windy and warm. COZ241-246-247-010500- /O.UPG.KBOU.FW.A.0004.230401T1800Z-230402T0100Z/ /O.NEW.KBOU.FW.W.0007.230401T1700Z-230402T0200Z/ /O.CON.KBOU.FW.W.0006.000000T0000Z-230401T0100Z/ 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- 251 PM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AREA...FIRE WEATHER ZONES 241...246...AND 247... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AREA...FIRE WEATHER ZONES 241...246...AND 247... 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 to 8 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 241, 246 and 247. * Timing...Until 7 PM MDT this evening, and then 11 am to 8 PM MDT Saturday. * Winds...West 20 to 30 mph with gusts up to 55 mph until early this evening. On Saturday, west winds 15 to 25 mph with gusts around 35 mph. * Relative Humidity...As low as 11 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ214-010500- /O.NEW.KBOU.FW.W.0007.230401T1700Z-230402T0200Z/ /O.CON.KBOU.FW.W.0006.000000T0000Z-230401T0100Z/ Central and Southeast Park County- 251 PM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK...FIRE WEATHER ZONE 214... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK...FIRE WEATHER ZONE 214... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 8 PM MDT Saturday. * Affected Area...Fire Weather Zone 214. * Timing...Until 7 PM MDT this evening, and then 11 am to 8 PM MDT Saturday. * Winds...West 20 to 30 mph with gusts up to 55 mph until early this evening. On Saturday, west winds 15 to 25 mph with gusts around 35 mph. * Relative Humidity...As low as 15 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ216-239-240-010100- /O.CON.KBOU.FW.W.0006.000000T0000Z-230401T0100Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 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- 251 PM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS AND DENVER/BOULDER METRO AREAS...FIRE WEATHER ZONES 216...239...and 240... * Affected Area...Fire Weather Zones 216, 239 and 240. * Timing...Noon until 7 PM MDT this evening. * Winds...West 25 to 35 mph with gusts up to 60 mph until early evening. * Relative Humidity...As low as 15 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$
880 WWUS85 KBOU 010055 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 655 PM MDT Fri Mar 31 2023 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED AGAIN ON SATURDAY... Very strong and gusty west to northwest winds that we observed today will gradually diminish early this evening. However, only moderate humidity recovery will occur overnight. On Saturday, we'll turn warmer which means somewhat lower humidity readings. Fortunately winds will be lighter, but at the same time still reach Red Flag Criteria over the southern portions of our forecast area from Park County eastward across the Palmer Divide. Winds gusting to 25 to 30 mph will coincide with minimum humidity values of 10 to 16 percent. Sunday will feature increasing winds and even warmer temperatures, so more widespread critical fire weather conditions can be expected then. Monday should finally start a cooldown, but southern portions around Park County and adjacent areas toward the Palmer Divide could still stay windy and warm. COZ214-241-246-247-010900- /O.CAN.KBOU.FW.W.0006.000000T0000Z-230401T0100Z/ /O.CON.KBOU.FW.W.0007.230401T1700Z-230402T0200Z/ Central and Southeast Park County- 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- 655 PM MDT Fri Mar 31 2023 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK...FIRE WEATHER ZONE 214... ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK...FIRE WEATHER ZONE 214... The National Weather Service in Denver has cancelled the Red Flag Warning. * Affected Area...Fire Weather Zones 214, 241, 246 and 247. * Timing...Until 7 PM MDT this evening, and then 11 am to 8 PM MDT Saturday. * Winds...Southwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 10 percent. * Impacts...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activities that may produce sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 can contribute to extreme fire behavior. && $$ COZ216-239-240-010200- /O.CAN.KBOU.FW.W.0006.000000T0000Z-230401T0100Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 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- 655 PM MDT Fri Mar 31 2023 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS AND DENVER/BOULDER METRO AREAS...FIRE WEATHER ZONES 216...239...AND 240... The National Weather Service in Denver has cancelled the Red Flag Warning. Critical fire weather conditions are no longer occurring so the warning has expired. $$
What forecasters said that day
The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Denver/Boulder, CO wrote its last area forecast discussion before this red flag warning went out at Mar 29, 11:43 AM MDT, 3 hours 24 minutes earlier.
Area forecast discussion, Mar 29, 11:43 AM MDT, 3 hours 24 minutes before
Area Forecast Discussion National Weather Service Denver/Boulder CO 1143 AM MDT Wed Mar 29 2023 .UPDATE... Issued at 1013 AM MDT Wed Mar 29 2023 Forecast is on track and only minor updates this morning. Lowered temperatures slightly due to status cloud seen on satellite over the far northeast plains and Fort Collins area, and snow on ground. Minor adjustments to sky cover per latest satellite observations. && .SHORT TERM...(Today and tonight) Issued at 356 AM MDT Wed Mar 29 2023 Upper level ridge axis will track across Colorado today. It will be replaced by an increasing southwest flow aloft tonight in advance of the next Pacific storm system. At the surface a cold front is just entering northeast Colorado. It will back southwest through the morning hours and bring a weak northeast wind shift with it. There are some low clouds across western Nebraska behind the front. Expect them to move into far northeast Colorado this morning. As these low clouds encounter the higher terrain, the clouds may be on the ground and result in fog. The cooler airmass behind the front will be shallow, so the mountains and higher foothills may be above the cooler air and be as warmer or warmer than the northeast plains today. Temperatures tonight will slightly warmer than last night, but readings will continue to be a little below normal. .LONG TERM...(Thursday through Tuesday) Issued at 356 AM MDT Wed Mar 29 2023 Thursday, the trough will advance and flow aloft will be turning southwesterly and increasing, as there is a roughly 100 knot jet embedded ahead. Synoptic ascent will also be increasing though northeast Colorado will be under the right exit region of that jet until probably evening, and the convergence aloft will conflict with that ascent. The southwesterly flow will regardless support orographic showers in mountains as long as it isn't too southerly, and there will be strong lapse rates, though there looks to be very modest moisture. It will dry and warming across the lower elevations especially with downsloping winds and lee troughing, though temperatures should still be moderated by snow cover on the far northeast plains. It also looks to be very breezy by afternoon due to good mixing, forecast soundings suggest mixing to around 600 mb where there should be around 40 to 50 knots. I adjusted our forecast winds down to account for the known bias in the current NBM and we don't expect winds strong enough to warrant wind highlights. Expect peak afternoon gusts generally 40 to 55 mph across much of northeast Colorado, favoring the southern mountains, foothills, Palmer Divide and adjacent plains through Lincoln County. These strong winds combined with particularly dry conditions in the same area will mean widespread critical and elevated fire weather conditions from late morning through early evening. While the higher terrain will still have snow cover by that time, much of the plains especially east and south of the Palmer Divide will not and critical fire weather conditions are likely. I upgraded to a Red Flag Warning, expanded the area to include the rest of the plains of Elbert and Lincoln Counties, and extended the timing to 8 PM MDT. Thursday evening, the jet embedded ahead of the trough should be moved across northeast Colorado such that we are under the left exit region with divergence aloft, and also with greater general synoptic ascent. Cold air will move into the mountains and the orographic flow will turn northwesterly which is much more favorable for precipitation. There should also be another, stronger front across the plains, bringing precipitation to the plains, as rain first then mix, then snow by night. Late Thursday and early Friday, with the trough axis overhead and colder air aloft, decent lapse rates, the best best synoptic ascent, and strong frontogenesis, we likely see the greatest and most widespread precipitation from the system. However, the whole event will be moisture limited especially over the plains. Event total snowfall accumulations (through Friday) will likely be generally 3 to 6 inches across the mountains, up to 9 for the favored peaks and only 1 to 3 inches for the valleys, and only about an inch on the plains, slushy. I have issued a Winter Weather Advisory for the Park Range from Thursday noon through and night. I currently agree with the previous forecaster that the impacts would likely minimal and it probably isn't worth a highlight right now. Friday, the system should be exiting and we will have rising pressure heights, northwesterly flow aloft. Should be cooler again and clearing over plains while light showers persist in mountains through evening. Models are showing strong subsidence behind this trough and strong winds by Friday afternoon, again gusting generally 40 to 55 mph again but much more widespread across northeast Colorado. We will assess the need for any wind highlights following our current set of highlights. This weekend, models have a flat ridge over Colorado with mostly zonal flow aloft as the next trough sinks toward the Pacific Northwest. Skies should be partly cloudy to mostly clear and a warming trend again. Temperatures are forecast back to near normal across the plains Saturday and a bit warm Sunday, with highs possibly approaching 70 F around the greater Denver area, while cooler air lingers across the high country. Early next week, models have the next trough moving over the western states and deepening, with increasingly more southwesterly flow aloft over Colorado and showers increasing in the mountains again and maybe getting out onto the plains a bit by Tuesday. However, ensemble forecast systems indicate lower confidence in this next system at this range. Generally, expect the next trough incoming by around mid-week, and much greater confidence once this upcoming system has passed. && .AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon) Issued at 1142 AM MDT Wed Mar 29 2023 VFR conditions expected for Denver area airports through TAF time. Stratus to the far northeast is backing slightly to the west but will not get to DIA or other airports. Winds will stay mostly east to northeast today, a Denver cyclone will develop this afternoon through the evening but timing and evolution/movement is uncertain. We do think the HRRR is too aggressive with the cyclone displacement to the northeast into the cold pool this evening, so a more northerly component could stick around across the Denver metro airports through a good portion of the night, before returning to a more southwesterly flow toward 12Z Thursday. Thursday's challenge will revolve around the timing and intensity of southwest winds. KAPA should be the first to see winds increase around 16Z-17Z, and KDEN closer to 18Z-19Z, but still some uncertainty regarding that timing. KBJC could very well wait til 21Z or even later. Once winds become gusty from the southwest, look for gusts to gradually increase to 35-40 knots at KDEN and KAPA with the strongest gusts likely at KAPA. && .FIRE WEATHER... Issued at 356 AM MDT Wed Mar 29 2023 Strong and gusty southwest winds will develop over the southern foothills, Palmer Divide, and portions of the adjacent plains Thursday. Gusts of 35 to 55 mph can be expected and minimum humidity will likely drop to 10 to 15 percent. Snow cover is mostly melted in this area. We've upgraded to a Red Flag Warning, expanded the area to include the rest of the plains of Elbert and Lincoln Counties, and extended the timing to 8 PM MDT. && .BOU WATCHES/WARNINGS/ADVISORIES... Winter Weather Advisory from noon Thursday to noon MDT Friday for COZ031. Red Flag Warning from 11 AM to 8 PM MDT Thursday for COZ240-241- 246-247. && UPDATE...Barjenbruch/Chavez SHORT TERM...Meier LONG TERM...EJD AVIATION...Barjenbruch/Chavez FIRE WEATHER...EJD
Hazardous weather outlook, Mar 29, 10:50 AM MDT, 4 hours 17 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1050 AM MDT Wed Mar 29 2023 COZ030>051-301700- Jackson County Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- Grand and Summit Counties Below 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and Southeast Park County- 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- 1050 AM MDT Wed Mar 29 2023 ...WIND AND MOUNTAIN SNOW FOR THURSDAY... This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday On Thursday, expect warm, dry and breezy weather with elevated fire weather conditions on the plains from about I-70 southward. Widespread snowfall is likely across the high country Thursday afternoon through Friday, with several inches of accumulation and slick travel conditions at times. The plains will see a chance of rain showers changing to snow showers Thursday night into Friday morning. After dry weather Saturday, snow will return to the mountains Sunday or Monday, and there will be a chance of rain or snow showers at lower elevations early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. Barjenbruch/Chavez/Gimmestad
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 3:25 AM MDT | Winter Weather Advisory | BOU | Grand, Jackson | 63 hr |
| Mar 29, 4:09 AM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 2 more | 40 hr |
Nearby
Red Flag Warnings in Colorado, 2023Every red flag warning in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.