Alert archive / Colorado / Red Flag Warnings in 2026

Red Flag Warning 77, NWS Pueblo, CO

August 4, 2026Chaffee County, Lake County, Colorado

NWS Pueblo, CO issued this red flag warning at Aug 4, 2026, 12:33 PM MDT for Chaffee County, Lake County, Colorado. It took effect at Aug 5, 2026, 12:00 PM MDT. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 4, 2026, 12:33 PM MDT (18:33 UTC)
In effect from
Aug 5, 2026, 12:00 PM MDT
Expired
Aug 5, 2026, 7:00 PM MDT
In force
7 hr
Issued by
NWS Pueblo, CO

Counties Chaffee County, CO, Lake County, CO

The radar

The Grand Junction radar (KGJX), 168 km from the middle of the area, began a volume at 18:33 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.

The text

As transmitted.

107 
WWUS85 KPUB 041833
RFWPUB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pueblo CO
1233 PM MDT Tue Aug 4 2026


COZ220-051045-
/O.NEW.KPUB.FW.W.0077.260805T1800Z-260806T0100Z/
/O.NEW.KPUB.FW.A.0067.260806T1800Z-260807T0100Z/
Upper Arkansas River Valley Including Lake County and Chaffee
County-
1233 PM MDT Tue Aug 4 2026

...RED FLAG WARNING HAS BEEN ISSUED FROM NOON TO 7 PM MDT 
WEDNESDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE 
WEATHER ZONE 220... ...FIRE WEATHER WATCH HAS BEEN ISSUED FROM 
THURSDAY AFTERNOON THROUGH THURSDAY EVENING FOR GUSTY WINDS AND 
LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 220...

The National Weather Service in Pueblo has issued a Red Flag
Warning for gusty winds and low relative humidity, which is in
effect from noon to 7 PM MDT Wednesday. A Fire Weather Watch has
also been issued. This Fire Weather Watch for gusty winds and low
relative humidity is in effect from Thursday afternoon through
Thursday evening.

* AFFECTED AREA...Fire Weather Zone 220.

* WINDS...West 10 to 20 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 6 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise 
  extreme caution with any outdoor burning.

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.

&&

$$

COZ223-051045-
/O.NEW.KPUB.FW.A.0067.260806T1800Z-260807T0100Z/
Eastern San Juan Mountains and La Garita Mountains Including Wolf
Creek Pass and Creede-
1233 PM MDT Tue Aug 4 2026

...FIRE WEATHER WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH
THURSDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONE 223...

The National Weather Service in Pueblo has issued a Fire Weather
Watch for gusty winds and low relative humidity, which is in
effect from Thursday afternoon through Thursday evening.

* AFFECTED AREA...Fire Weather Zone 223.

* WINDS...Northwest 10 to 15 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 7 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise 
  extreme caution with any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$
3 follow-up statements
268 
WWUS85 KPUB 050626
RFWPUB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pueblo CO
1226 AM MDT Wed Aug 5 2026

COZ220-052230-
/O.CON.KPUB.FW.W.0077.260805T1800Z-260806T0100Z/
/O.CON.KPUB.FW.A.0067.260806T1800Z-260807T0100Z/
Upper Arkansas River Valley Including Lake County and Chaffee
County-
1226 AM MDT Wed Aug 5 2026

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT
THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONE 220...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH THURSDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE
HUMIDITY FOR FIRE WEATHER ZONE 220...

* AFFECTED AREA...Fire Weather Zone 220.

* WINDS...West 10 to 20 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 6 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise 
  extreme caution with any outdoor burning.

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.

&&

$$

COZ223-052230-
/O.CON.KPUB.FW.A.0067.260806T1800Z-260807T0100Z/
Eastern San Juan Mountains and La Garita Mountains Including Wolf
Creek Pass and Creede-
1226 AM MDT Wed Aug 5 2026

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH THURSDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE
HUMIDITY FOR FIRE WEATHER ZONE 223...

* AFFECTED AREA...Fire Weather Zone 223.

* WINDS...Northwest 5 to 15 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 7 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise 
  extreme caution with any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$
754 
WWUS85 KPUB 051839
RFWPUB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pueblo CO
1239 PM MDT Wed Aug 5 2026


COZ220-061045-
/O.UPG.KPUB.FW.A.0067.260806T1800Z-260807T0100Z/
/O.NEW.KPUB.FW.W.0078.260806T1800Z-260807T0100Z/
/O.CON.KPUB.FW.W.0077.000000T0000Z-260806T0100Z/
Upper Arkansas River Valley Including Lake County and Chaffee
County-
1239 PM MDT Wed Aug 5 2026

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING
FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE
220...
...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT THURSDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 220...

The National Weather Service in Pueblo has issued a Red Flag
Warning for gusty winds and low relative humidity, which is in
effect from noon to 7 PM MDT Thursday. The Fire Weather Watch is
no longer in effect.

* AFFECTED AREA...Fire Weather Zone 220.

* WINDS...West 10 to 20 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 7 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise 
  extreme caution with any outdoor burning.

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.

&&

$$

COZ223-061045-
/O.UPG.KPUB.FW.A.0067.260806T1800Z-260807T0100Z/
/O.NEW.KPUB.FW.W.0078.260806T1800Z-260807T0100Z/
Eastern San Juan Mountains and La Garita Mountains Including Wolf
Creek Pass and Creede-
1239 PM MDT Wed Aug 5 2026

...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT THURSDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 223...

The National Weather Service in Pueblo has issued a Red Flag
Warning for gusty winds and low relative humidity, which is in
effect from noon to 7 PM MDT Thursday. The Fire Weather Watch is
no longer in effect.

* AFFECTED AREA...Fire Weather Zone 223.

* WINDS...Northwest 10 to 20 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 8 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise 
  extreme caution with any outdoor burning.

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.

&&

$$
386 
WWUS85 KPUB 060049
RFWPUB

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pueblo CO
649 PM MDT Wed Aug 5 2026

COZ220-061700-
/O.EXP.KPUB.FW.W.0077.000000T0000Z-260806T0100Z/
/O.CON.KPUB.FW.W.0078.260806T1800Z-260807T0100Z/
Upper Arkansas River Valley Including Lake County and Chaffee
County-
649 PM MDT Wed Aug 5 2026

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT
THURSDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONE 220...

...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 220...

* AFFECTED AREA...Fire Weather Zone 220.

* WINDS...West 5 to 15 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 7 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise 
  extreme caution with any outdoor burning.

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.

&&

$$

COZ223-061700-
/O.CON.KPUB.FW.W.0078.260806T1800Z-260807T0100Z/
Eastern San Juan Mountains and La Garita Mountains Including Wolf
Creek Pass and Creede-
649 PM MDT Wed Aug 5 2026

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT
THURSDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONE 223...

* AFFECTED AREA...Fire Weather Zone 223.

* WINDS...Northwest 5 to 15 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 8 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise 
  extreme caution with any outdoor burning.

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.

&&

$$

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 Pueblo, CO wrote its last area forecast discussion before this red flag warning went out at Aug 4, 11:18 AM MDT, 1 hour 15 minutes earlier. Its key messages:

  • Much cooler today, with areas of low clouds on the plains this morning. Hazy conditions expected today.
  • Scattered Showers and thunderstorms along the mtns/plains interface this afternoon. We could see thunderstorms over the Aspen burn scar.
  • Warming up starting WED (but WED will still be pretty nice); temps in the 100s by Friday lasting until at least the end of this fcst period.
  • Some monsoon moisture in the mtns possible next week.
Area forecast discussion, Aug 4, 11:18 AM MDT, 1 hour 15 minutes before
Area Forecast Discussion
National Weather Service Pueblo CO
1118 AM MDT Tue Aug 4 2026

.KEY MESSAGES...

- Much cooler today, with areas of low clouds on the plains this
  morning. Hazy conditions expected today.

- Scattered Showers and thunderstorms along the mtns/plains interface
  this afternoon. We could see thunderstorms over the Aspen
  burn scar.

- Warming up starting WED (but WED will still be pretty nice);
  temps in the 100s by Friday lasting until at least the end of
  this fcst period.

- Some monsoon moisture in the mtns possible next week.

&&

.SHORT TERM /THROUGH TONIGHT/...
Issued at 1201 AM MDT Tue Aug 4 2026

A cool front was pushing across the plains very early this morning.
This front will bring much cooler air (and areas of morning stratus
clouds over the plains) to the lower elevations today. It will also
bring some gusty winds to parts of the plains very early this
morning. Later on today, Max temps over the plains will be in the
upper 70s across N El Paso county and L/M 80s over the rest of the
plains. Unfortunately, this cool air is relatively shallow an the
San Luis Valley will likely remain around 90 for tomorrow afternoon.
We will see some scattered showers and thunderstorms along the
mtns/plains interface by later this afternoon, and we could see some
locally heavy rain, and this could cause some issued for the Aspen
Acres (AA) burn scar. The rain is not expected to be excessively
heavy, but any locally heavy rain the wrong area could cause issues.
We may also see some stronger convection over the greater southern
Sangres/W Raton Mesa region tomorrow afternoon. Storms may linger
over the Raton Mesa area through the mid evening hours.

Along the CONTDVD, Elevated fire weather conditions will occur this
afternoon due to marginal gusty winds and RH values in the 15-20%
range

&&

.LONG TERM /WEDNESDAY THROUGH MONDAY/...
Issued at 1201 AM MDT Tue Aug 4 2026

From Wednesday into the weekend, it looks very dry over the area as
the 500-700 mb charts are showing little if any moisture in this
layer through this period. If we see any precip, it will be along
the CO/NM border areas during this time period. Spotty critical fire
weather conditions will be possible along the Divide. These spotty
critical fire weather conditions may migrate to the plains by the
weekend.

Unfortunately, temps will be gradually warming up from Wednesday
onwards, and temps will be in the 100s once again by Friday over the
plains. 100s are forecast from Friday through the end of this fcst
period (TUE)

By Sunday into early next week, we may see some monsoon moisture
increase over the higher terrain. \/Hodanish.

&&

.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 1118 AM MDT Tue Aug 4 2026

VFR conditions are mostly expected at KALS, KCOS, and KPUB through
24 hours.

Breezy winds will develop at the terminals this afternoon, southwest
at KALS and southeast over KCOS and KPUB. Along with increased mid-
level clouds, showers and passing thunderstorms are expected late
this afternoon into the evening. While chances for precipitation at
the terminals are low, gusty outflow winds will likely move across
the area around this time, leading to variable, gusty winds 35-40
knots. Given the scattered coverage of convection today, left as
PROB30s for now. Winds weaken overnight across the terminals, with
some mid to low-level clouds lingering at KCOS and KPUB.

&&

.PUB WATCHES/WARNINGS/ADVISORIES...
None.

&&

SHORT TERM...HODANISH
LONG TERM...HODANISH
AVIATION...GARBEROGLIO
Hazardous weather outlook, Aug 4, 11:19 AM MDT, 1 hour 14 minutes before
Hazardous Weather Outlook
National Weather Service Pueblo CO
1119 AM MDT Tue Aug 4 2026

COZ058>089-093>099-051730-
Western Mosquito Range/East Lake County Above 11000 Feet-
Leadville Vicinity/Lake County Below 11000 Feet-
Eastern Sawatch Mountains Above 11000 Feet-
Western Chaffee County Between 9000 and 11000 Feet-
Central Chaffee County Below 9000 Feet-
Western Mosquito Range/East Chaffee County Above 9000 Feet-
Saguache County West of Continental Divide Below 10000 Feet-
Saguache County East of Continental Divide Below 10000 Feet-
La Garita Mountains Above 10000 Feet-
Upper Rio Grande Valley/Eastern San Juan Mountains Below
10000 Feet-Eastern San Juan Mountains Above 10000 Feet-
Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet-
Alamosa  Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Feet-
Southern Sangre de Cristo Mountains Above 11000 Feet-
Northwestern Fremont County Above 8500 Feet-
Western/Central Fremont County Below 8500 Feet-
Wet Mountain Valley Below 8500 Feet-
Wet Mountains between 6300 and 10000 Feet-
Wet Mountains Above 10000 Feet-
Teller County/Rampart Range Above 7500 Feet/Pikes Peak Between
7500 And 11000 Feet-Pikes Peak Above 11000 Feet-
Canon City Vicinity/Eastern Fremont County-
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Feet-
Colorado Springs Vicinity/Southern El Paso County/Rampart Range
Below 7400 Feet-Pueblo Vicinity/Pueblo County Below 6300 Feet-
Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Feet-
Trinidad Vicinity/Western Las Animas County Below 7500 Feet-
Crowley County-La Junta Vicinity/Otero County-
Eastern Las Animas County-Western Kiowa County-
Eastern Kiowa County-Las Animas Vicinity/Bent County-
Lamar Vicinity/Prowers County-Springfield Vicinity/Baca County-
1119 AM MDT Tue Aug 4 2026

This hazardous weather outlook is for portions of central...east
central...south central and southeast Colorado.

.DAY ONE...This Afternoon and Tonight

One or two strong thunderstorms will be possible across the southern
Sangre De Cristo mountains and adjacent areas. Winds gusts to 50 to
60 mph will be possible along with hail ranging from nickels to
quarters.

Showers and thunderstorms will be possible across the southern
mountains today, including the Aspen Acres burn scar. If a strong
storm should develop over the burn scar, then flash flooding could
occur, especially over the central part of the burn scar.

Elevated fire weather conditions will be possible along the
Continental Divide today.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Elevated fire weather conditions will be possible along the
Continental Divide through the rest of this week. These elevated
fire weather conditions will then be possible across parts of the
plains this upcoming weekend.

Temperatures will once again become hot by Friday and last into the
weekend. Readings in the 100s will be likely across a good part of
the plains Friday through Monday.

.SPOTTER INFORMATION STATEMENT...

Weather conditions that meet reporting criteria for spotters will
be possible over portions of the region.

GARBEROGLIO/GARBEROGLIO

The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 3, 8:42 PM MDTSpecial Weather StatementPUB33 min
Aug 4, 12:33 PM MDTFire Weather WatchPUBChaffee, Conejos, Lake, Mineral, Rio Grande, Saguache24 hr
Aug 4, 1:53 PM MDTSpecial Weather StatementPUBSaguache37 min
Aug 4, 2:25 PM MDTSpecial Weather StatementPUBTeller35 min
Aug 4, 3:10 PM MDTSpecial Weather StatementPUBCostilla35 min
Aug 4, 3:48 PM MDTSpecial Weather StatementPUB27 min
Aug 4, 5:39 PM MDTSpecial Weather StatementPUBHuerfano36 min
Aug 4, 5:59 PM MDTSpecial Weather StatementPUBHuerfano31 min

Nearby

Red Flag Warnings in Colorado, 2026Every red flag warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.