Alert archive / Colorado / Flash Flood Warnings in 2026

Flash Flood Warning 87, NWS Pueblo, CO

August 31, 2026Kiowa County, Colorado

NWS Pueblo, CO issued this flash flood warning at Aug 31, 2026, 7:45 PM MDT for Kiowa County, Colorado. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 31, 2026, 7:45 PM MDT (01:45 UTC)
Expired
Aug 31, 2026, 10:27 PM MDT
In force
3 hr
Issued by
NWS Pueblo, CO
Area
Storm-based polygon
Flood severity
None

County Kiowa County, CO

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 1.8 hours before the alert went out and 225 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.

Skew-T log-pSkew-T log-p diagram, Dodge City, at 00:00Z on 2026-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 190 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 00:00Z on 2026-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
190 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
3208 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

412 
WGUS55 KPUB 010145
FFWPUB
COC061-010445-
/O.NEW.KPUB.FF.W.0087.260901T0145Z-260901T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
745 PM MDT Mon Aug 31 2026

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  Southeastern Kiowa County in southeastern Colorado...

* Until 1045 PM MDT.

* At 745 PM MDT, Doppler radar indicated thunderstorms producing
  heavy rain in Big Sandy and Buffalo Creek Drainages south of
  Brandon and Sheridan Lake. Between 1.5 and 3 inches of rain have
  fallen. The expected rainfall rate is 1 to 3 inches in 1 hour.
  Additional rainfall amounts up to 1 inch are possible in portions
  of the warned area. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flash flooding of small creeks and streams, highways,
           rural roads, streets and underpasses as well as other poor
           drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Sheridan Lake, Brandon and Chivington.

This includes the following streams and drainages...
  Big Sandy Creek and Rush Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3849 10215 3837 10215 3832 10224 3831 10247
      3834 10255 3843 10255 3850 10249 3851 10229

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-3 INCHES IN 1 HOUR

$$

KT
2 follow-up statements
796 
WGUS75 KPUB 010216
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
816 PM MDT Mon Aug 31 2026

COC061-010445-
/O.CON.KPUB.FF.W.0087.000000T0000Z-260901T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kiowa CO-
816 PM MDT Mon Aug 31 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM MDT THIS
EVENING FOR SOUTHEASTERN KIOWA COUNTY...

At 816 PM MDT, Doppler radar indicated the thunderstorms that
produced heavy rain in Big Sandy and Buffalo Creek Drainages south of
Brandon and Sheridan Lake have moved east of the area. Between 1.5
and 3 inches of rain have fallen. Additional rainfall amounts are
expected to remain under 0.25 inches from additional showers over the
area. However, flash flooding will continue until the water has a
chance to recede.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, highways, rural
         roads, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Sheridan Lake, Brandon and Chivington.

This includes the following streams and drainages...
  Big Sandy Creek and Rush Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3849 10215 3837 10215 3832 10224 3831 10247
      3834 10255 3843 10255 3850 10249 3851 10229

FLASH FLOOD...RADAR INDICATED

$$
407 
WGUS75 KPUB 010427
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
1027 PM MDT Mon Aug 31 2026

COC061-010437-
/O.CAN.KPUB.FF.W.0087.000000T0000Z-260901T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kiowa CO-
1027 PM MDT Mon Aug 31 2026

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN KIOWA COUNTY...

The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.

&&

LAT...LON 3849 10215 3837 10215 3832 10224 3831 10247
      3834 10255 3843 10255 3850 10249 3851 10229

$$

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Aug 31, 5:41 PM MDT, 2 hours 4 minutes earlier. Its key messages:

  • Shortwave will move across the region bring showers and thunderstorms to the area late this afternoon and evening; some of the activity will move across during the late evening/early AM hours.
  • Drier weather Tuesday through Thursday
  • Better monsoon flow pattern returns late this week into the weekend.
Area forecast discussion, Aug 31, 5:41 PM MDT, 2 hours 4 minutes before
Area Forecast Discussion
National Weather Service Pueblo CO
541 PM MDT Mon Aug 31 2026

.KEY MESSAGES...

- Shortwave will move across the region bring showers and
thunderstorms to the area late this afternoon and evening; some of
the activity will move across during the late evening/early AM
hours.

- Drier weather Tuesday through Thursday

- Better monsoon flow pattern returns late this week into the
weekend.

&&

.SHORT TERM /THROUGH TONIGHT/...
Issued at 1253 PM MDT Mon Aug 31 2026

Overall, most of the region, especially the higher terrain, should
see precip between now and late night tonight. The least amount of
precip will be over the far southeast part of the plains. flash
flooding will be possible along the Divide.

The I-25 corridor may see 2 rounds of precip today. The first will
be the normal showers and storms coming through during the normal
late afternoon and early evening time period. Best activity is
expected to from along the Raton Mesa later this afternoon and move
north-northeat. Activity farther north during this time period will
be more isolated. Later this evening, a more pronounced short wave
will move across and this will likely bring a better chance of
showers and some tsra to the I-25 corridor region.

Looking at the weather for the mountains, we will see a better
chance of showers and storms later this afternoon, this evening and
into the early morning hours. The better chance for heavier rain
will be over the central mountains, and areas such as the Chalk
Bluffs and Willow burn scar will have to be watched carefully for
flash flooding through this period.

&&

.LONG TERM /TUESDAY THROUGH MONDAY/...
Issued at 1253 PM MDT Mon Aug 31 2026

Although the monsoon plume will stay over the region this week, the
quality of the moisture will be less. Likewise, showers and storms
will be possible over the region, but there will be less activity
Tuesday through the Thursday time period. Overall, expect scattered
storms in the mtns, and isolated activity over the plains.

From Friday into the weekend, Deterministic guidance shows moisture
increasing through the column during this period. and showers and
storms should become more prevalent over the region during this time
period. This same overall pattern is indicated by the statistical
guidance. Warmest temps should occur late in the week. 100s may come
back to parts of the far east plains Friday and Saturday. A bit of a
cooling pattern possible by early next week, but there is
disagreement in the guidance about this outcome.

Checking the fire weather parameters during this forecast period, we
may see some spotty conditions on Thursday across a small part of
the region.

&&

.AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/...
Issued at 535 PM MDT Mon Aug 31 2026

VFR TAFs are expected to persist outside some temporary reduced
vis within evening convection. Monsoon moisture will remain
across the area through the evening so kept chances for storms
across the terminals into late this evening. Diurnal wind
patterns should become commonplace outside of storm outflows
this evening.

&&

.PUB WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch until midnight MDT tonight for COZ059>061.

&&

SHORT TERM...HODANISH
LONG TERM...HODANISH
AVIATION...GRIESEMER
Hazardous weather outlook, Aug 31, 11:35 AM MDT, 8 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Pueblo CO
1135 AM MDT Mon Aug 31 2026

COZ058>089-093>099-011745-
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-
1135 AM MDT Mon Aug 31 2026

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

.DAY ONE...This Afternoon and Tonight

Showers and thunderstorms will develop over the mountains this
afternoon and spread into the adjacent valleys and plains through
the late afternoon and evening hours. Some of the activity over
the region will last into the overnight hours.

The main risks with thunderstorms over the mountains will be
heavy rainfall capable of producing flash flooding, especially
over the central mountain region.

Elsewhere over the plains, a few strong storms will be possible
across the lower elevations east of a line from Rocky Ford to
Trinidad. Small hail under 1 inch in diameter, wind gusts up to 50
mph, and locally heavy rainfall will be possible with the
stronger storms.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Isolated to scattered thunderstorms will be possible on Tuesday,
especially across the mountains.  Brief heavy rainfall, lightning
and gusty outflow winds up to 40 mph will be possible.  After a dry
period for Wednesday and Thursday, scattered thunderstorms will
return to the forecast for Friday into next weekend, with locally
heavy rainfall and gusty outflow winds possible with the stronger
storms.

.SPOTTER INFORMATION STATEMENT...

Weather spotters will not be needed today or tonight.

Hodanish

In the hours before

Local storm report, Aug 31, 6:45 PM MDT, 1 hour before
Preliminary Local Storm Report
National Weather Service Pueblo CO
645 PM MDT Mon Aug 31 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0630 PM     Tstm Wnd Gst     7 SE Lamar              38.02N 102.53W
08/31/2026  M77 MPH          Prowers            CO   Public

            PWS.

&&

ng
Local storm report, Aug 31, 6:46 PM MDT, 59 minutes before
Preliminary Local Storm Report
National Weather Service Pueblo CO
646 PM MDT Mon Aug 31 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0640 PM     Tstm Wnd Gst     6 SE Mcclave            38.07N 102.76W
08/31/2026  M60 MPH          Bent               CO   Public

            PWS.

&&

ng
Local storm report, Aug 31, 6:47 PM MDT, 58 minutes before
Preliminary Local Storm Report
National Weather Service Pueblo CO
647 PM MDT Mon Aug 31 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0644 PM     Tstm Wnd Gst     5 S Sheridan Lake       38.40N 102.29W
08/31/2026  M63 MPH          Kiowa              CO   Public

            PWS.

&&

ng
Special weather statement, Aug 31, 6:47 PM MDT, 58 minutes before
Special Weather Statement
National Weather Service Pueblo CO
647 PM MDT Mon Aug 31 2026

COZ097>099-010115-
Springfield Vicinity/Baca County CO-Lamar Vicinity/Prowers County CO-
Las Animas Vicinity/Bent County CO-
647 PM MDT Mon Aug 31 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN PROWERS...
NORTHWESTERN BACA AND SOUTHEASTERN BENT COUNTIES THROUGH 715 PM
MDT...

At 647 PM MDT, Doppler radar was tracking a strong thunderstorm 18
miles north of Pritchett, or 24 miles northwest of Springfield,
moving northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

This storm will remain over mainly rural areas of southwestern
Prowers, northwestern Baca and southeastern Bent Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3751 10290 3761 10307 3786 10297 3771 10266
TIME...MOT...LOC 0047Z 208DEG 21KT 3763 10295

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

kam
Special weather statement, Aug 31, 6:52 PM MDT, 53 minutes before
Special Weather Statement
National Weather Service Pueblo CO
652 PM MDT Mon Aug 31 2026

COZ069-070-072-073-078-010115-
Alamosa  Vicinity/Central San Luis Valley Below 8500 Ft CO-
Wet Mountain Valley Below 8500 Ft CO-
Del Norte Vicinity/Northern San Luis Valley Below 8500 Ft CO-
Northern Sangre de Cristo Mountains Between 8500 And 11000 Ft CO-
Northern Sangre de Cristo Mountains above 11000 Ft CO-
652 PM MDT Mon Aug 31 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN ALAMOSA...
NORTHWESTERN HUERFANO...SOUTH CENTRAL CUSTER AND SOUTHEASTERN
SAGUACHE COUNTIES THROUGH 715 PM MDT...

At 652 PM MDT, Doppler radar was tracking a strong thunderstorm over
Great Sand Dunes, or 27 miles northeast of Alamosa, moving north at
30 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Great Sand Dunes and Crestone Peak.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3775 10557 3777 10569 3803 10568 3798 10537
TIME...MOT...LOC 0052Z 195DEG 25KT 3781 10562

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
Local storm report, Aug 31, 7:04 PM MDT, 41 minutes before
Preliminary Local Storm Report
National Weather Service Pueblo CO
704 PM MDT Mon Aug 31 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0615 PM     Rain             6 SW Higbee             37.71N 103.52W
08/31/2026  M2.20 Inch       Otero              CO   Public

            PWS.

&&

ng

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 6:11 PM MDTSpecial Weather StatementPUBAlamosa34 min
Aug 31, 6:26 PM MDTSevere Thunderstorm Warning Considerable damage threatPUBBent, Kiowa, Prowers49 min
Aug 31, 6:41 PM MDTSevere Thunderstorm Warning Considerable damage threatPUBBent, Kiowa, Prowers49 min
Aug 31, 6:47 PM MDTSpecial Weather StatementPUBBent28 min
Aug 31, 6:50 PM MDTSevere Thunderstorm WarningPUBKiowa25 min
Aug 31, 6:52 PM MDTSpecial Weather StatementPUBCuster23 min
Aug 31, 7:13 PM MDTSevere Thunderstorm Warning Considerable damage threatPUBBent, Kiowa, Prowers62 min
Aug 31, 7:28 PM MDTSevere Thunderstorm WarningPUBProwers32 min
Aug 31, 7:56 PM MDTSpecial Weather StatementPUBProwers34 min
Sep 1, 3:59 PM MDTSpecial Weather StatementPUBProwers46 min
Sep 1, 4:06 PM MDTSpecial Weather StatementPUBBaca39 min
Sep 1, 4:09 PM MDTSpecial Weather StatementPUB51 min
Sep 1, 5:00 PM MDTSpecial Weather StatementPUBBaca30 min
Sep 1, 5:23 PM MDTSpecial Weather StatementPUBSaguache52 min

Nearby

Flash Flood Warnings in Colorado, 2026Every flash flood 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; the sounding from the Mesonet's radiosonde archive.