Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 5, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 28, 2021, 11:58 AM MDT for 7 counties in Colorado. It took effect at Mar 29, 2021, 12:00 PM MDT. It was in force for 7 hr. 15 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 28, 2021, 11:58 AM MDT (17:58 UTC)
- In effect from
- Mar 29, 2021, 12:00 PM MDT
- Expired
- Mar 29, 2021, 7:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Elbert County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 29, 1:01 PM MDT | NON-TSTM WND GST 55 | 13 Ene Kiowa, CO | MESONET STATION AR864 KIOWA. |
| Mar 29, 2:45 PM MDT | NON-TSTM WND GST 50 | 8 Nnw Boyero, CO | MESONET STATION UP711 7.7 NW BOYERO (UPR). |
| Mar 29, 3:06 PM MDT | NON-TSTM WND GST 50 | Hugo, CO | MESONET STATION EW0539 HUGO. |
| Mar 29, 3:15 PM MDT | NON-TSTM WND GST 52 | 7 Ssw Hugo, CO | MESONET STATION EW9214 HUGO. |
| Mar 29, 3:25 PM MDT | NON-TSTM WND GST 51 | 1 Sse Agate, CO | MESONET STATION UP693 0.5 SE AGATE (UPR). |
| Mar 29, 3:56 PM MDT | NON-TSTM WND GST 54 | 1 E Limon, CO | ASOS STATION KLIC LIMON. |
| Mar 29, 5:17 PM MDT | NON-TSTM WND GST 56 | 2 Nne Ovid, CO | MESONET STATION UP469 2.3 NE OVID (UPR). |
| Mar 29, 5:42 PM MDT | NON-TSTM WND GST 60 | 2 Se Julesburg, CO | MESONET STATION CO034 076W180 JULESBURG. |
| Mar 29, 6:02 PM MDT | NON-TSTM WND GST 63 | 8 S Holyoke, CO | MESONET STATION CO048 385S271 HOLYOKE. |
| Mar 29, 6:12 PM MDT | NON-TSTM WND GST 50 | 2 Ese Sterling, CO | MESONET STATION CO035 076E125 STERLING. |
| Mar 29, 6:19 PM MDT | NON-TSTM WND GST 56 | Akron, CO | ASOS STATION KAKO AKRON. |
| Mar 29, 6:32 PM MDT | NON-TSTM WND GST 53 | 2 Ene Wiggins, CO | MESONET STATION CO039 076W067 WIGGINS BIJOU CREEK. |
| Mar 29, 6:35 PM MDT | NON-TSTM WND GST 53 | Fort Morgan Airport, CO | AWOS STATION KFMM FORT MORGAN. |
| Mar 29, 6:35 PM MDT | NON-TSTM WND GST 58 | 2 Se Holyoke, CO | AWOS STATION KHEQ HOLYOKE AIRPORT. |
| Mar 29, 6:45 PM MDT | NON-TSTM WND GST 50 | North Sterling Reservoi, CO | MESONET STATION TT562 NORTH STERLING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 6.0 hours before the alert went out and 26 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
- 2414 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
722 WWUS85 KBOU 281758 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1158 AM MDT Sun Mar 28 2021 ...RED FLAG WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH EARLY MONDAY EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR LINCOLN AND EASTERN ELBERT COUNTIES... COZ246-247-290200- /O.UPG.KBOU.FW.A.0002.210329T1800Z-210330T0100Z/ /O.NEW.KBOU.FW.W.0005.210329T1800Z-210330T0100Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 1158 AM MDT Sun Mar 28 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR LINCOLN AND EASTERN ELBERT COUNTIES... 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 Monday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 246 and 247. * Timing...Monday afternoon and early evening. * Winds...West 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 11 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. 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. && $$
4 follow-up statements
565 WWUS85 KBOU 290324 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 924 PM MDT Sun Mar 28 2021 ...RED FLAG WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH EARLY MONDAY EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR LINCOLN AND EASTERN ELBERT COUNTIES... COZ246-247-291130- /O.CON.KBOU.FW.W.0005.210329T1800Z-210330T0100Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 924 PM MDT Sun Mar 28 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR LINCOLN AND EASTERN ELBERT COUNTIES... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Monday afternoon and early evening. * Winds...West 20 to 30 mph with gusts up to 45 mph. * Relative Humidity...As low as 9 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
706 WWUS85 KBOU 291114 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 514 AM MDT Mon Mar 29 2021 ...RED FLAG WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH EARLY MONDAY EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR LINCOLN AND EASTERN ELBERT COUNTIES... COZ246-247-292100- /O.CON.KBOU.FW.W.0005.210329T1800Z-210330T0100Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 514 AM MDT Mon Mar 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR LINCOLN AND EASTERN ELBERT COUNTIES... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Monday afternoon and early evening. * Winds...West 20 to 30 mph with gusts up to 45 mph. * Relative Humidity...As low as 8 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. 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. && $$ Gimmestad
637 WWUS85 KBOU 291443 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 843 AM MDT Mon Mar 29 2021 ...RED FLAG WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH EARLY MONDAY EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR PORTIONS OF EASTERN PLAINS COUNTIES... COZ244-248>251-300100- /O.EXA.KBOU.FW.W.0005.210329T1800Z-210330T0100Z/ Morgan County-Logan County-Washington County-Sedgwick County- Phillips County- 843 AM MDT Mon Mar 29 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR MORGAN, WASHINGTON, LOGAN, PHILLIPS, AND SEDGWICK COUNTIES... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 7 PM MDT this evening. * Affected Area...Fire Weather Zones 244, 248, 249, 250 and 251. * Timing...Monday afternoon and early evening. * Winds...West 25 to 35 mph with gusts up to 50 mph. * Relative Humidity...As low as 10 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ246-247-300100- /O.CON.KBOU.FW.W.0005.210329T1800Z-210330T0100Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 843 AM MDT Mon Mar 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR LINCOLN AND EASTERN ELBERT COUNTIES... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Monday afternoon and early evening. * Winds...West 20 to 30 mph with gusts up to 45 mph. * Relative Humidity...As low as 8 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. 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. && $$
979 WWUS85 KBOU 300055 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 655 PM MDT Mon Mar 29 2021 COZ244-246>251-300200- /O.EXP.KBOU.FW.W.0005.000000T0000Z-210330T0100Z/ Morgan County- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 655 PM MDT Mon Mar 29 2021 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEAST COLORADO PLAINS...FIRE WEATHER ZONES 244...AND 246 THROUGH 251... A strong cold front was pushing across east central Colorado early this evening. While it will be windy behind the front, humidities are increasing into the 40 to 50 percent range as temperatures turn much colder. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 2:08 PM MDT | High Wind Watch | BOU | Boulder, Clear Creek, Douglas, Elbert, Gilpin, Grand and 12 more | 19 hr |
Nearby
Red Flag Warnings in Colorado, 2021Every red flag warning in 2021
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.