(Cheyenne - Rawlins - Sherman) County Emergency Management

06/05/2026

06/02/2026

*** THIS POST IS NO LONGER CURRENT ***

Additional showers and storms are forecast to develop overnight. Some areas of heavy rainfall are possible as well which brings the concern for some flash flooding potential through Tuesday morning. Remain aware for any flooded roads and streams overnight.

06/01/2026

...FLOOD ADVISORY IN EFFECT UNTIL 10 PM MDT THIS EVENING... Sherman County

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Portions of east central Colorado, including the following
county, Kit Carson and northwest Kansas, including the following
county, Sherman.

* WHEN...Until 1000 PM MDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS...
- At 508 PM MDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 1 and 2 inches of rain
have fallen.
- Additional rainfall amounts up to 2 inches are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
Burlington and Bethune.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

06/01/2026

**Severe Thunderstorm WARNING**
Southeastern Sherman County in northwestern Kansas...

* Until 615 PM MDT/715 PM CDT/.

* At 514 PM MDT/614 PM CDT/, a severe thunderstorm was located 8
miles west of Winona, or 21 miles south of Brewster, moving north
at 10 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
southwestern Thomas, northwestern Logan and southeastern Sherman
Counties.

This includes Interstate 70 in Kansas between mile markers 35 and 38.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This thunderstorm will produce strong winds resulting in areas of
near zero visibility in blowing dirt. Use extreme caution if you must
travel and be alert for rapidly changing visibility.

&&

06/01/2026

**Severe Thunderstorm WARNING **
Western Cheyenne
NW Sherman

* Severe Thunderstorm Warning for...
Southeastern Yuma County in northeastern Colorado...
Northeastern Kit Carson County in east central Colorado...
Western Cheyenne County in northwestern Kansas...
Northwestern Sherman County in northwestern Kansas...

* Until 615 PM MDT/715 PM CDT/.

* At 520 PM MDT/620 PM CDT/, a severe thunderstorm was located near
Bonny Reservoir, moving north at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
southeastern Yuma County in northeastern Colorado, northeastern Kit
Carson County in east central Colorado, western Cheyenne and
northwestern Sherman Counties in northwestern Kansas, including the
following locations... Wheeler, Hale, and Beecher Island.

This includes Highway 385 between mile markers 201 and 215.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

06/01/2026

**This Post Is No Longer Current**

Storms have fired up along a good portion of the area and are generally moving north/northeast. Heavy rain, large hail, blowing dust have been reported. Wind gusts to 70 mph are possible as the evening goes on.

06/01/2026

**Severe Thunderstorm WARNING **
NW Cheyenne County, KS

* Severe Thunderstorm Warning for...
Southeastern Yuma County in northeastern Colorado...
Northwestern Cheyenne County in northwestern Kansas...

* Until 600 PM MDT/700 PM CDT/.

* At 455 PM MDT/555 PM CDT/, a severe thunderstorm was located 13 miles north of Bonny Reservoir, moving northeast at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of southeastern Yuma County in northeastern Colorado and northwestern Cheyenne Counties in northwestern Kansas, including the following
locations... Beecher Island.

This includes Highway 385 between mile markers 217 and 236.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a building.

&&

06/01/2026

**Severe Thunderstorm WARNING**
NW Sherman
SW Cheyenne
Wind, Blowing Dust, and 2" hail

* Severe Thunderstorm Warning for...
Southwestern Cheyenne County in northwestern Kansas...
Northwestern Sherman County in northwestern Kansas...

* Until 545 PM MDT/645 PM CDT/.

* At 439 PM MDT/539 PM CDT/, a severe thunderstorm was located 13 miles north of Ruleton, moving northeast at 15 mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of southwestern Cheyenne and northwestern Sherman Counties in
northwestern Kansas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a building.

Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.

&&

06/01/2026

**Severe Thunderstorm WATCH**
Includes Cheyenne, Rawlins, and Sherman counties....

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
265 IN EFFECT UNTIL 11 PM MDT /MIDNIGHT CDT/ THIS EVENING

06/01/2026

Severe storms are likely across the area this afternoon and evening. On Tuesday, confidence is somewhat lower, but if storms develop they may produce hail and isolated severe wind gusts, mainly in the evening.