Alert archive / Colorado / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 34, NWS Denver/Boulder, CO

June 1, 2026Arapahoe County, Denver County, Douglas County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 1, 2026, 1:28 PM MDT for Arapahoe County, Denver County, Douglas County, Colorado. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 1, 2026, 1:28 PM MDT (19:28 UTC)
Expired: Jun 1, 2026, 2:15 PM MDT
In force: 47 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Arapahoe County, CO, Denver County, CO, Douglas County, CO

The radar

The Denver radar (KFTG), 27 km from the middle of the area, began a volume at 19:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 1, 12:52 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 1, 1:16 PM MDT, 12 minutes earlier.

Area forecast discussion, Jun 1, 1:16 PM MDT, 12 minutes before

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In the hours before

Special weather statement, Jun 1, 8:22 AM MDT, 5 hours 6 minutes before

Special Weather Statement
National Weather Service Denver CO
822 AM MDT Mon Jun 1 2026

COZ042-044-048-011500-
Logan County CO-Morgan County CO-Northeast Weld County CO-
822 AM MDT Mon Jun 1 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHERN MORGAN...WEST CENTRAL
LOGAN AND EASTERN WELD COUNTIES UNTIL 9 AM MDT...

At 822 AM MDT, Doppler radar was tracking a strong thunderstorm 4
miles south of Stoneham, or 22 miles north of Fort Morgan, moving
northeast at 30 mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
  Pawnee Pass, Willard, Stoneham and Logan Corners.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 4052 10371 4059 10379 4083 10345 4063 10324
      4045 10363
TIME...MOT...LOC 1422Z 230DEG 28KT 4055 10365

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

09

Special weather statement, Jun 1, 8:58 AM MDT, 4 hours 30 minutes before

Special Weather Statement
National Weather Service Denver CO
858 AM MDT Mon Jun 1 2026

COZ048-011545-
Logan County CO-
858 AM MDT Mon Jun 1 2026

...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL LOGAN COUNTY UNTIL
945 AM MDT...

At 858 AM MDT, Doppler radar was tracking a strong thunderstorm near
Logan Corners, or 8 miles west of Sterling, moving northeast at 15
mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
  Northwestern Sterling, North Sterling Reservoir and Logan Corners.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 4058 10334 4069 10348 4084 10330 4070 10306
TIME...MOT...LOC 1458Z 225DEG 13KT 4066 10335

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

09

Local storm report, Jun 1, 1:15 PM MDT, 13 minutes before

Preliminary Local Storm Report
National Weather Service Denver CO
115 PM MDT Mon Jun 1 2026

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

0105 PM     Hail             1 E Edgewater           39.75N 105.04W
06/01/2026  M1.00 Inch       Denver             CO   Trained Spotter

0106 PM     Hail             Denver                  39.74N 104.99W
06/01/2026  M0.75 Inch       Denver             CO   Public

            Report from mPING: Dime (0.75 in.).

0107 PM     Hail             Denver                  39.74N 104.99W
06/01/2026  M1.00 Inch       Denver             CO   NWS Employee

0110 PM     Hail             1 NW Denver             39.75N 105.00W
06/01/2026  E1.75 Inch       Denver             CO   Public

0110 PM     Hail             2 W Denver              39.74N 105.02W
06/01/2026  M1.00 Inch       Denver             CO   Trained Spotter

0111 PM     Hail             1 SE Denver             39.73N 104.98W
06/01/2026  E1.00 Inch       Denver             CO   Public

            Report from mPING: Quarter (1.00 in.).

0114 PM     Hail             1 SE Denver             39.73N 104.97W
06/01/2026  M1.50 Inch       Denver             CO   Trained Spotter

&&

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 1, 5:41 AM MDT	Special Weather Statement	BOU	Washington	34 min
Jun 1, 6:38 AM MDT	Special Weather Statement	BOU	Washington	37 min
Jun 1, 8:22 AM MDT	Special Weather Statement	BOU	Logan	38 min
Jun 1, 8:58 AM MDT	Special Weather Statement	BOU	Logan	47 min
Jun 1, 1:04 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	41 min
Jun 1, 1:31 PM MDT	Severe Thunderstorm Warning	BOU	Douglas, Elbert	44 min
Jun 1, 1:35 PM MDT	Severe Thunderstorm Warning	BOU	Boulder, Weld	23 min
Jun 1, 1:38 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Adams, Arapahoe, Denver	52 min
Jun 1, 1:53 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe	37 min
Jun 1, 2:04 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Denver	3 hr
Jun 1, 2:14 PM MDT	Flash Flood Warning	BOU	Adams, Arapahoe, Denver	95 min
Jun 1, 2:21 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	39 min
Jun 1, 2:29 PM MDT	Tornado Warning	BOU	Adams, Arapahoe	46 min
Jun 1, 2:52 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Adams, Arapahoe	53 min
Jun 1, 3:02 PM MDT	Tornado Warning	BOU	Adams, Arapahoe	43 min
Jun 1, 3:07 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Larimer, Weld	38 min
Jun 1, 3:13 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Adams, Arapahoe, Washington	47 min
Jun 1, 3:24 PM MDT	Tornado Warning	BOU	Adams, Washington	39 min
Jun 1, 3:28 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Larimer, Weld	18 min
Jun 1, 3:33 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Douglas, Elbert	25 min
Jun 1, 3:34 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Adams, Weld	41 min
Jun 1, 3:40 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Adams, Morgan, Washington	50 min
Jun 1, 3:53 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Adams, Morgan, Weld	25 min
Jun 1, 4:24 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan, Washington	41 min
Jun 1, 4:37 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan, Washington	28 min
Jun 1, 4:38 PM MDT	Severe Thunderstorm Warning	BOU	Douglas, Elbert	52 min
Jun 1, 4:51 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	39 min
Jun 1, 5:00 PM MDT	Tornado Warning	BOU	Washington	45 min
Jun 1, 5:04 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Washington	41 min
Jun 1, 5:07 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	23 min
Jun 1, 5:26 PM MDT	Severe Thunderstorm Warning	BOU	Washington	34 min
Jun 1, 5:28 PM MDT	Tornado Warning	BOU	Washington	32 min
Jun 1, 5:45 PM MDT	Severe Thunderstorm Warning	BOU	Washington	15 min
Jun 1, 5:53 PM MDT	Special Weather Statement	BOU	Logan, Phillips, Sedgwick	67 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2026 Every severe thunderstorm 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.