Alert archive / Colorado / Red Flag Warnings in 2024
Red Flag Warning 21, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Jul 14, 2024, 4:25 AM MDT for 11 counties in Colorado. It took effect at Jul 14, 2024, 12:00 PM MDT. It was in force for 9 hr. 1 report 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
- Jul 14, 2024, 4:25 AM MDT (10:25 UTC)
- In effect from
- Jul 14, 2024, 12:00 PM MDT
- Expired
- Jul 14, 2024, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 86 km from the middle of the area, began a volume at 10:25 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 |
|---|---|---|---|
| Jul 14, 2:09 PM MDT | LANDSPOUT | 3 Ene Shamballa, CO | Relayed through media. |
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 00:00Z, 10.4 hours before the alert went out and 270 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
- 5081 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
498 WWUS85 KBOU 141025 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 425 AM MDT Sun Jul 14 2024 COZ211>218-238-150300- /O.UPG.KBOU.FW.A.0010.240714T1800Z-240715T0300Z/ /O.NEW.KBOU.FW.W.0021.240714T1800Z-240715T0300Z/ Jackson County Below 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Grand and Summit Counties Below 9000 Feet- Central and Southeast Park County- 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- West Jackson and West Grand Counties Above 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- Larimer County Below 6000 Feet/Northwest Weld County- 425 AM MDT Sun Jul 14 2024 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR THUNDERSTORMS WITH DRY LIGHTNING FOR THE MOUNTAINS, FOOTHILLS, AND EASTERN LARIMER COUNTY... The National Weather Service in Denver has issued a Red Flag Warning for thunderstorms, which is in effect from noon today to 9 PM MDT this evening. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 211, 212, 213, 214, 215, 216, 217, 218 and 238. * Timing...12 PM to 9 PM MDT Sunday. * Winds...Gusty winds up to 45 mph near showers and storms. * Relative Humidity...As low as 13 percent. * Impacts...Conditions will be favorable for lightning-induced ignitions from mostly dry thunderstorms. Locally erratic outflow winds near thunderstorms could promote rapid wildfire spread in the event of a new start. If a fire were to become established, conditions could be favorable for large vertical plume growth. * Thunderstorms...Isolated to scattered (15-25% coverage) of mostly dry thunderstorms is expected Sunday afternoon, potentially extending into early evening. Thunderstorms will be high-based, producing little, if any, precipitation, and thus resulting in an increased threat of lightning-induced ignitions. 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. && $$
1 follow-up statement
509 WWUS85 KBOU 150253 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 853 PM MDT Sun Jul 14 2024 COZ211>218-238-150400- /O.EXP.KBOU.FW.W.0021.000000T0000Z-240715T0300Z/ Jackson County Below 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Grand and Summit Counties Below 9000 Feet- Central and Southeast Park County- Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- Larimer County Below 6000 Feet/Northwest Weld County- 853 PM MDT Sun Jul 14 2024 ...RED FLAG WARNING FOR DRY THUNDERSTORMS WILL EXPIRE AT 9 PM MDT THIS EVENING... High-based shower and thunderstorm coverage has diminished significantly this evening. Isolated showers will remain possible across the mountains through about midnight, but lightning coverage should be minimal, so the Red Flag Warning will be allowed to expire. $$ Rodriguez
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 7:59 PM MDT | Fire Weather Watch | BOU | Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 5 more | 8 hr |
| Jul 13, 8:54 PM MDT | Special Weather Statement | BOU | Boulder | 51 min |
| Jul 13, 9:38 PM MDT | Special Weather Statement | BOU | Denver | 52 min |
| Jul 13, 10:27 PM MDT | Special Weather Statement | BOU | Adams, Arapahoe | 48 min |
| Jul 14, 5:25 PM MDT | Special Weather Statement | BOU | Logan | 50 min |
Nearby
Red Flag Warnings in Colorado, 2024Every red flag warning in 2024
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.