Alert archive / Colorado / Red Flag Warnings in 2018
Red Flag Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 4, 2018, 9:49 AM MST for 16 counties in Colorado. It took effect at Mar 5, 2018, 10:00 AM MST. It was in force for 8 hr. 25 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 4, 2018, 9:49 AM MST (16:49 UTC)
- In effect from
- Mar 5, 2018, 10:00 AM MST
- Expired
- Mar 5, 2018, 6:00 PM MST
- 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 16:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 5, 10:22 AM MST | NON-TSTM WND GST 55 | 1 Se Julesburg, CO | MESONET STATION CO034, 1 SE JULESBURG. |
| Mar 5, 10:47 AM MST | NON-TSTM WND GST 55 | Jeffco Airport, CO | AWOS STATION BJC, JEFFCO AIRPORT. |
| Mar 5, 10:52 AM MST | NON-TSTM WND GST 58 | 2 Se Sterling, CO | MESONET STATION CO035, 2 SE STERLING. |
| Mar 5, 11:02 AM MST | NON-TSTM WND GST 56 | Briggsdale, CO | MESONET STATION CO043, BRIGGSDALE. |
| Mar 5, 11:10 AM MST | NON-TSTM WND GST 56 | Sterling, CO | AWOS STATION STK, STERLING. |
| Mar 5, 12:02 PM MST | NON-TSTM WND GST 59 | 1 Ssw Bennett, CO | MESONET STATION CO072, 1 SSW BENNETT. |
| Mar 5, 12:03 PM MST | NON-TSTM WND GST 58 | Limon Municipal Airport, CO | ASOS STATION LIC, LIMON MUNICIPAL AIRPORT. |
| Mar 5, 12:32 PM MST | NON-TSTM WND GST 57 | 2 Nne Natural Fort Rest, CO | MESONET STATION CO041, 2 NNE NATURAL FORT REST. |
| Mar 5, 12:35 PM MST | NON-TSTM WND GST 71 | 4 E Buckeye, CO | MESONET STATION BEYC2, 4 E BUCKEYE. |
| Mar 5, 12:42 PM MST | NON-TSTM WND GST 61 | 8 S Holyoke, CO | MESONET STATION CO048, 8 S HOLYOKE. |
| Mar 5, 12:45 PM MST | NON-TSTM WND GST 63 | Akron-Washington County, CO | ASOS STATION AKO, AKRON-WASHINGTON COUNTY AIRPORT. |
| Mar 5, 12:47 PM MST | NON-TSTM WND GST 60 | Denver International Ai, CO | ASOS STATION DEN, DENVER INTERNATIONAL AIRPORT. |
| Mar 5, 1:03 PM MST | NON-TSTM WND GST 55 | 8 Ssw Grover, CO | MESONET STATION C5040, 8 SSW GROVER. |
| Mar 5, 1:12 PM MST | NON-TSTM WND GST 62 | Virginia Dale, CO | MESONET STATION CO036, VIRGINIA DALE. |
| Mar 5, 1:32 PM MST | NON-TSTM WND GST 56 | Briggsdale, CO | MESONET STATION CO043, BRIGGSDALE. |
| Mar 5, 1:32 PM MST | NON-TSTM WND GST 59 | 2 Nne Natural Fort Rest, CO | MESONET STATION CO041, 2 NNE NATURAL FORT REST. |
| Mar 5, 1:40 PM MST | HIGH SUST WINDS 56 | 4 Nnw Nunn, CO | MESONET STATION UP718, 4 NNW NUNN. |
| Mar 5, 1:42 PM MST | NON-TSTM WND GST 56 | 4 Wnw Woodlin School, CO | MESONET STATION CO046, 4 WNW WOODLIN SCHOOL. |
| Mar 5, 1:52 PM MST | NON-TSTM WND GST 60 | 1 Ssw Bennett, CO | MESONET STATION CO072, 1 SSW BENNETT. |
| Mar 5, 1:53 PM MST | NON-TSTM WND GST 64 | 8 Ssw Grover, CO | MESONET STATION C5040, 8 SSW GROVER. |
| Mar 5, 2:04 PM MST | NON-TSTM WND GST 61 | Limon Municipal Airport, CO | ASOS STATION LIC, LIMON MUNICIPAL AIRPORT. |
| Mar 5, 2:06 PM MST | NON-TSTM WND GST 58 | Fort Collins-Loveland M, CO | AWOS STATION FNL, FORT COLLINS-LOVELAND MUNICIPAL AIRPORT. |
| Mar 5, 2:47 PM MST | NON-TSTM WND GST 63 | Akron-Washington County, CO | ASOS STATION AKO, AKRON-WASHINGTON COUNTY AIRPORT. |
| Mar 5, 3:22 PM MST | NON-TSTM WND GST 61 | 2 Se Sterling, CO | MESONET STATION CO035, 2 SE STERLING. |
| Mar 5, 3:35 PM MST | NON-TSTM WND GST 58 | Akron, CO | MESONET STATION E7755, AKRON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 4.8 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
- 4203 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
490 WWUS85 KBOU 041649 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver CO 949 AM MST Sun Mar 4 2018 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED THROUGH MONDAY... .Warm, dry and very windy conditions during the afternoon and early evening hours today ahead of and behind a strong cold front will again produce critical wildfire conditions. A cold front will drop temperatures but increase the northwest winds on Monday, leading to another day of critical fire weather conditions. Today southwest winds ahead of the front will shift to the west/northwest and increase with gusts to around 45 mph as the front sweeps across the plains late in the afternoon. The shifting winds may produce erratic fire behavior and growth of any existing fires. On Monday despite cooler temperatures, very strong and gusty northwest winds combined with low relative humidity will again produce high fire danger on the plains. The strongest winds should occur across the northeast quarter of Colorado, generally east of a Greeley to Limon line. Winds all across the Plains will be strong enough to meet red flag criteria and as a result, a red flag warning has been issued for the plains of northeast Colorado. COZ239-240-050100- /O.UPG.KBOU.FW.A.0005.180305T1700Z-180306T0000Z/ /O.NEW.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ /O.CON.KBOU.FW.W.0006.180304T1800Z-180305T0200Z/ 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- 949 AM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR STRONG GUSTY WINDS AND VERY LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 239 AND 240... ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR VERY STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 239 AND 240... The National Weather Service in Denver has issued a Red Flag Warning, which is in effect from 10 AM to 6 PM MST Monday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 238...239...240...242... 243...244 and 248. * Timing...This afternoon into the evening and again Monday afternoon and evening. * Winds...Southwest winds 15 to 25 mph with gusts increasing to 35 mph shifting to the west 20 to 30 mph with gusts up to 45 mph late in the afternoon. On Monday Northwest 25 to 40 mph with gusts from 50 to 60 mph. * Relative Humidity...As low as 10 percent this afternoon. 10 to 15 percent Monday afternoon. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. 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. && $$ COZ241-247-050100- /O.UPG.KBOU.FW.A.0005.180305T1700Z-180306T0000Z/ /O.NEW.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ /O.CON.KBOU.FW.W.0006.180304T1800Z-180305T0200Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- Southeast Elbert County Below 6000 Feet/South Lincoln County- 949 AM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR STRONG GUSTY WINDS AND VERY LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 241 AND 247... ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR VERY STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 241 AND 247... The National Weather Service in Denver has issued a Red Flag Warning, which is in effect from 10 AM to 6 PM MST Monday. The Fire Weather Watch is no longer in effect. * Timing...This afternoon into the evening and again Monday afternoon and evening. * Winds...Southwest winds 15 to 25 mph with gusts increasing to 35 mph shifting to the west 20 to 30 mph with gusts up to 45 mph late in the afternoon. On Monday Northwest 25 to 40 mph with gusts from 50 to 60 mph. * Relative Humidity...As low as 8 percent this afternoon. 10 percent to 15 percent Monday afternoon. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ238-242>244-248-050100- /O.UPG.KBOU.FW.A.0005.180305T1700Z-180306T0000Z/ /O.NEW.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ /O.CON.KBOU.FW.W.0006.180304T1800Z-180305T0200Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Central and South Weld County-Morgan County- Logan County- 949 AM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR STRONG GUSTY WINDS AND VERY LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 238, 242, 243, 244, AND 248... ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR VERY STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 238, 242, 243, 244, AND 248... The National Weather Service in Denver has issued a Red Flag Warning, which is in effect from 10 AM to 6 PM MST Monday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 238...239...240...242... 243...244 and 248. * Timing...This afternoon into the evening and again Monday afternoon and evening. * Winds...Southwest winds 15 to 25 mph with gusts increasing to 35 mph shifting to the west 20 to 30 mph with gusts up to 45 mph late in the afternoon. On Monday Northwest 30 to 45 mph with gusts from 55 to 65 mph. * Relative Humidity...As low as 10 percent this afternoon. 10 to 15 percent Monday afternoon. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. 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. && $$ COZ245-246-249-050100- /O.UPG.KBOU.FW.A.0005.180305T1700Z-180306T0000Z/ /O.NEW.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ /O.CON.KBOU.FW.W.0006.180304T1800Z-180305T0200Z/ Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Washington County- 949 AM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR STRONG GUSTY WINDS AND VERY LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 245, 246, AND 249... ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR VERY STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 245, 246, AND 249... The National Weather Service in Denver has issued a Red Flag Warning, which is in effect from 10 AM to 6 PM MST Monday. The Fire Weather Watch is no longer in effect. * Timing...This afternoon into the evening and again Monday afternoon and evening. * Winds...Southwest winds 15 to 25 mph with gusts increasing to 35 mph shifting to the west 20 to 30 mph with gusts up to 45 mph late in the afternoon. On Monday Northwest 25 to 40 mph with gusts from 50 to 60 mph. * Relative Humidity...As low as 8 percent this afternoon. 10 percent to 15 percent Monday afternoon. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ250-251-050100- /O.UPG.KBOU.FW.A.0005.180305T1700Z-180306T0000Z/ /O.NEW.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ Sedgwick County-Phillips County- 949 AM MST Sun Mar 4 2018 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR VERY STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 250 AND 251... The National Weather Service in Denver has issued a Red Flag Warning, which is in effect from 10 AM to 6 PM MST Monday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 250 and 251. * Timing...Monday afternoon into the evening. * Winds...Northwest 40 to 55 mph with gusts up to 70 mph. * Relative Humidity...As low as 15 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. 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. && $$ COZ216-050100- /O.CON.KBOU.FW.W.0006.180304T1800Z-180305T0200Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 949 AM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR SRONG GUSTY WINDS AND VERY LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 216... * Affected Area...Fire Weather Zone 216. * Timing...This afternoon into early evening. * Winds...West 20 to 30 mph with gusts up to 50 mph. * Relative Humidity...As low as 10 percent. * Impacts...Gusty, shifting winds and low relative humidity during the afternoon will produce conditions favorable for fire starts and rapid growth. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
5 follow-up statements
745 WWUS85 KBOU 050100 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 600 PM MST Sun Mar 4 2018 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED THROUGH MONDAY... .A cold front will continue to push southeast across the plains early this evening with wind shifting to the northwest but remaining gusty up to 45 mph. Humidities have improved significantly as colder temperatures were arriving behind the front, so today's Red Flag Warning will be allowed to expire at 7 PM. On Monday, despite cooler temperatures, very strong and gusty northwest winds combined with low relative humidity will again produce very high if not extreme fire danger on the plains. The strongest winds should occur across the northeast quarter of Colorado, generally east of a Greeley to Limon line where gusts will push to near 60 mph. Winds across all of the Plains will be strong enough to meet red flag criteria and as a result, a Red Flag Warning has been issued for the plains of Colorado. COZ239-240-050900- /O.CON.KBOU.FW.W.0006.000000T0000Z-180305T0200Z/ /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ 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- 600 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR DENVER AND BOULDER METRO AREA... ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR DENVER AND BOULDER METRO AREA... * Affected Area...Fire Weather Zones 239 and 240. * Timing...Early this evening, and again late Monday morning through the afternoon. * Winds...Northwest 25 to 35 mph with gusts up to 50 mph. * Relative Humidity...As low as 12 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. 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. && $$ COZ241-247-050900- /O.CON.KBOU.FW.W.0006.000000T0000Z-180305T0200Z/ /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- Southeast Elbert County Below 6000 Feet/South Lincoln County- 600 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AREA... ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AREA...... * Timing...Early this evening, and again late Monday morning through the afternoon. * Winds...Northwest 25 to 35 mph with gusts up to 50 mph. * Relative Humidity...10 to 15 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ238-242>244-248-050900- /O.CON.KBOU.FW.W.0006.000000T0000Z-180305T0200Z/ /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Central and South Weld County-Morgan County- Logan County- 600 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF THE NORTHEAST PLAINS OF COLORADO... ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF THE NORTHEAST PLAINS OF COLORADO... * Affected Area...Fire Weather Zones 238...242...243...244 and 248. * Timing...Early this evening, and again late Monday morning through the afternoon. * Winds...Northwest 35 to 45 mph with gusts up to 65 mph. * Relative Humidity...As low as 13 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. 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. && $$ COZ245-246-249-050900- /O.CON.KBOU.FW.W.0006.000000T0000Z-180305T0200Z/ /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Washington County- 600 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF THE NORTHEAST PLAINS OF COLORADO... ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF THE NORTHEAST PLAINS OF COLORADO... * Timing...Early this evening, and then again late Monday morning through Monday afternoon. * Winds...Northwest 30 to 40 mph with gusts up to 60 mph. * Relative Humidity...As low as 12 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ216-050200- /O.CON.KBOU.FW.W.0006.000000T0000Z-180305T0200Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 600 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS... * Affected Area...Fire Weather Zone 216. * Timing...Ending early this evening. * Winds...West 20 to 30 mph with gusts up to 55 mph. * Relative Humidity...Improving to around 30 percent. * Impacts...Gusty, shifting winds and low relative humidity will produce conditions favorable for fire starts and rapid growth. 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. && $$ COZ250-251-050900- /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ Sedgwick County-Phillips County- 600 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF THE NORTHEAST PLAINS OF COLORADO.... * Affected Area...Fire Weather Zones 250 and 251. * Timing...Late Monday morning through the afternoon. * Winds...Northwest 35 to 45 mph with gusts up to 65 mph. * Relative Humidity...As low as 18 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
544 WWUS85 KBOU 050209 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 709 PM MST Sun Mar 4 2018 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED THROUGH MONDAY... .Humidities have improved significantly as colder temperatures were arriving behind the front, so today's Red Flag Warning has been allowed to expire. However, it will still be windy overnight so any existing burns will need to be monitored closely. On Monday, despite cooler temperatures, very strong and gusty northwest winds combined with low relative humidity will again produce very high if not extreme fire danger on the plains. The strongest winds should occur across the northeast quarter of Colorado, generally east of a Greeley to Limon line where gusts will push to near 60 mph. A Red Flag Warning remains in effect for all of the plains of Colorado. COZ239>241-247-051015- /O.EXP.KBOU.FW.W.0006.000000T0000Z-180305T0200Z/ /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ 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- Southeast Elbert County Below 6000 Feet/South Lincoln County- 709 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR INTO THE PALMER DIVIDE... ...TODAY'S RED FLAG WARNING HAS EXPIRED... * Affected Area...Fire Weather Zones 239...240...241 and 247. * Timing...Late Monday morning through Monday afternoon. * Winds...Northwest 25 to 35 mph with gusts up to 50 mph. * Relative Humidity...As low as 12 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. 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. && $$ COZ238-242>246-248-249-051015- /O.EXP.KBOU.FW.W.0006.000000T0000Z-180305T0200Z/ /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Logan County-Washington County- 709 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEAST PLAINS OF COLORADO... ...TODAY'S RED FLAG WARNING HAS EXPIRED... * Affected Area...Fire Weather Zones 238...242...243...244... 245...246...248 and 249. * Timing...Late Monday morning through Monday afternoon. * Winds...Northwest 35 to 45 mph with gusts up to 60 mph. * Relative Humidity...10 to 15 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ216-050315- /O.EXP.KBOU.FW.W.0006.000000T0000Z-180305T0200Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- 709 PM MST Sun Mar 4 2018 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS... It will be windy overnight with only moderate humidity recovery. Winds will continue to be gusty through Monday, but humidities will be above Red Flag criteria. $$ COZ250-251-051015- /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ Sedgwick County-Phillips County- 709 PM MST Sun Mar 4 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 6 PM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEAST PLAINS OF COLORADO... * Affected Area...Fire Weather Zones 250 and 251. * Timing...Late Monday morning through Monday afternoon. * Winds...Northwest 35 to 45 mph with gusts up to 65 mph. * Relative Humidity...As low as 18 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
327 WWUS85 KBOU 051131 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 431 AM MST Mon Mar 5 2018 ...CRITICAL FIRE WEATHER CONDITIONS TODAY... .Despite much cooler temperatures, very strong and gusty northwest winds combined with low relative humidity will again produce extreme fire danger on the plains. The strongest winds will occur generally east of a Greeley to Denver line and extend towards Limon. Gusts up to 60 mph will be possible. Thus a Red Flag Warning remains in effect for all of the plains of Colorado. COZ239>241-247-051945- /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ 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- Southeast Elbert County Below 6000 Feet/South Lincoln County- 431 AM MST Mon Mar 5 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR INTO THE PALMER DIVIDE... * Affected Area...Fire Weather Zones 239...240...241 and 247. * Timing...Late this morning through this afternoon. * Winds...Northwest 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 10 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. 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. && $$ COZ238-242>246-248>251-051945- /O.CON.KBOU.FW.W.0007.180305T1700Z-180306T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Logan County-Washington County-Sedgwick County- Phillips County- 431 AM MST Mon Mar 5 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEAST PLAINS OF COLORADO... * Affected Area...Fire Weather Zones 238...242...243...244... 245...246...248...249...250 and 251. * Timing...Late this morning through this afternoon. * Winds...Northwest 30 to 40 mph with gusts up to 60 mph. * Relative Humidity...As low as 13 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
311 WWUS85 KBOU 051743 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1043 AM MST Mon Mar 5 2018 ...CRITICAL FIRE WEATHER CONDITIONS TODAY... .Despite much cooler temperatures, very strong and gusty northwest winds combined with low relative humidity will again produce extreme fire danger on the plains. Wind gusts are currently gusting in the 40 to 55 mph range across much of the plains. Humidities are currently in the 18 to 25 percent range and will continue to drop this afternoon. The strongest winds will occur generally east of a Greeley to Denver line and extend towards Limon. Gusts up to 60 mph will be possible late morning through the afternoon. Red Flag Warning remains in effect for all of the plains of Colorado. COZ239>241-247-060100- /O.CON.KBOU.FW.W.0007.000000T0000Z-180306T0100Z/ 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- Southeast Elbert County Below 6000 Feet/South Lincoln County- 1043 AM MST Mon Mar 5 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE I-25 CORRIDOR INTO THE PALMER DIVIDE... * Affected Area...Fire Weather Zones 239...240...241 and 247. * Timing...Late this morning through this afternoon. * Winds...Northwest 25 to 35 mph with gusts up to 55 mph. * Relative Humidity...As low as 10 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. 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. && $$ COZ238-242>246-248>251-060100- /O.CON.KBOU.FW.W.0007.000000T0000Z-180306T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Logan County-Washington County-Sedgwick County- Phillips County- 1043 AM MST Mon Mar 5 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEAST PLAINS OF COLORADO... * Affected Area...Fire Weather Zones 238...242...243...244... 245...246...248...249...250 and 251. * Timing...Late this morning through this afternoon. * Winds...Northwest 30 to 40 mph with gusts up to 60 mph. * Relative Humidity...As low as 13 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. Outdoor burning is prohibited. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
731 WWUS85 KBOU 060114 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 614 PM MST Mon Mar 5 2018 COZ238>251-060215- /O.EXP.KBOU.FW.W.0007.000000T0000Z-180306T0100Z/ 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- 614 PM MST Mon Mar 5 2018 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR ALL OF NORTHEAST COLORADO... Humidities are slowly increasing with values reaching the 15 to 25 percent range early this evening, and winds are slowly decreasing. Only moderate humidity recovery will occur overnight. Fire danger will be elevated on Tuesday, with gusty winds on the eastern plains and only a slight increase in humidity. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 4, 5:22 AM MST | High Wind Watch | BOU | Adams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 3 more | 9 hr |
| Mar 4, 5:22 AM MST | High Wind Warning | BOU | Adams, Arapahoe, Elbert, Larimer, Lincoln, Logan and 5 more | 36 hr |
Nearby
Red Flag Warnings in Colorado, 2018Every red flag warning in 2018
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.