Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Jan 14, 2021, 1:25 PM MST for 8 counties in Colorado. It took effect at Jan 15, 2021, 10:00 AM MST. It was in force for 7 hr. 4 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
- Jan 14, 2021, 1:25 PM MST (20:25 UTC)
- In effect from
- Jan 15, 2021, 10:00 AM MST
- Expired
- Jan 15, 2021, 5:00 PM MST
- 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, Weld County, CO
The radar
The Denver radar (KFTG), 109 km from the middle of the area, began a volume at 20:25 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 |
|---|---|---|---|
| Jan 15, 10:07 AM MST | NON-TSTM WND GST 58 | 2 Nnw Briggsdale, CO | MESONET STATION TT567 CROW CREEK. |
| Jan 15, 10:12 AM MST | NON-TSTM WND GST 58 | 1 Nnw Briggsdale, CO | MESONET STATION CO043 014W176 BRIGGSDALE. |
| Jan 15, 10:58 AM MST | NON-TSTM WND GST 59 | 5 N Pawnee Buttes, CO | AWOS STATION K1OW OSCAR MADIS. |
| Jan 15, 11:42 AM MST | NON-TSTM WND GST 63 | 3 S Cedar Point, CO | MESONET STATION CO066 SH-86 CEDAR POINT. |
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, 8.4 hours before the alert went out and 34 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
- 1 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 2072 m above ground
- 0-6 km bulk shear
- 124 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
004 WWUS85 KBOU 142025 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 125 PM MST Thu Jan 14 2021 COZ242-244-246>251-151200- /O.NEW.KBOU.FW.W.0001.210115T1700Z-210116T0000Z/ Northeast Weld County-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- 125 PM MST Thu Jan 14 2021 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 5 PM MST FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN COLORADO... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM to 5 PM MST Friday. * Affected Area...Fire Weather Zones 242, 244, 246, 247, 248, 249, 250 and 251. * Timing...10 AM to 5 PM MST Friday. * Winds...North 25 to 35 mph with gusts up to 60 mph. * Relative Humidity...As low as 12 percent. * Impacts...The strong winds combined with low relative humidity may cause new fire starts to very 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. && $$
3 follow-up statements
958 WWUS85 KBOU 151037 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 337 AM MST Fri Jan 15 2021 COZ242-244-246>251-151845- /O.CON.KBOU.FW.W.0001.210115T1700Z-210116T0000Z/ Northeast Weld County-Morgan County- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 337 AM MST Fri Jan 15 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY ACROSS THE EASTERN COLORADO PLAINS... * Affected Area...Fire Weather Zones 242, 244, 246, 247, 248, 249, 250 and 251. * Timing...10 AM to 5 PM MST Friday. * Winds...North 35 to 45 mph with gusts up to 65 mph. * Relative Humidity...As low as 15 percent. * Impacts...The strong winds combined with low relative humidity may cause new fire starts to very rapidly spread and grow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
912 WWUS85 KBOU 151854 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1154 AM MST Fri Jan 15 2021 COZ242-244-246>251-160000- /O.CON.KBOU.FW.W.0001.000000T0000Z-210116T0000Z/ Northeast Weld County-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- 1154 AM MST Fri Jan 15 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY ACROSS THE EASTERN COLORADO PLAINS... * Affected Area...Fire Weather Zones 242, 244, 246, 247, 248, 249, 250 and 251. * Timing...Until 5 PM MST Friday. * Winds...North 30 to 40 mph with gusts up to 70 mph. * Relative Humidity...As low as 13 percent. * Impacts...The strong winds combined with low relative humidity may cause new fire starts to very 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. && $$
889 WWUS85 KBOU 160001 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 501 PM MST Fri Jan 15 2021 COZ242-244-246>251-160115- /O.EXP.KBOU.FW.W.0001.000000T0000Z-210116T0000Z/ Northeast Weld County-Morgan County- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 501 PM MST Fri Jan 15 2021 ...RED FLAG WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY ACROSS THE EASTERN COLORADO PLAINS... Winds are decreasing and humidities are beginning to recover so the Red Flag Warning has been allowed to expire. $$
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; radar from the NEXRAD Level II archive.