Alert archive / Colorado / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 103, NWS Denver/Boulder, CO

July 26, 2022Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 26, 2022, 6:41 PM MDT for Lincoln County, Colorado. It was in force for 34 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: Jul 26, 2022, 6:41 PM MDT (00:41 UTC)
Expired: Jul 26, 2022, 7:15 PM MDT
In force: 34 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 82 km from the middle of the area, began a volume at 00:43 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 nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 0.7 hours before the alert went out and 343 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1158 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 2267 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 256 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.7

Open this sounding in Storm Lab

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 Jul 26, 6:20 PM MDT, 21 minutes earlier.

Area forecast discussion, Jul 26, 6:20 PM MDT, 21 minutes before

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Hazardous weather outlook, Jul 26, 9:52 AM MDT, 8 hours 49 minutes before

Hazardous Weather Outlook
National Weather Service Denver CO
952 AM MDT Tue Jul 26 2022

COZ030>051-271600-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-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-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
952 AM MDT Tue Jul 26 2022

This Hazardous Weather Outlook is for portions of central
Colorado, east central Colorado, north central Colorado, and
northeast Colorado.

.DAY ONE...Today and Tonight

Scattered thunderstorms will develop this afternoon, primarily
from the Front Range to South Park, then eastward across the
plains. The stronger storms will produce brief moderate to heavy
rainfall, wind gusts to 50 mph and frequent cloud-to-ground
lightning. Localized flooding may impact the burn scars as well,
but at this time it looks like the stronger storms should develop
south and east of those areas.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There will be a chance of thunderstorms mainly over the plains on
Wednesday. A few storms may become severe by late afternoon into
the evening hours. In addition heavy rainfall will be possible.
For Thursday and Friday it will be cooler with showers and
thunderstorms. Locally heavy rainfall will be possible with a risk
of flash flooding in the burn scars.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

In the hours before

Special weather statement, Jul 26, 3:44 PM MDT, 2 hours 57 minutes before

Special Weather Statement
National Weather Service Denver CO
344 PM MDT Tue Jul 26 2022

COZ039-040-262215-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-
North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
344 PM MDT Tue Jul 26 2022

...A strong thunderstorm will impact portions of Broomfield,
northwestern Adams and east central Boulder Counties through 415 PM
MDT...

At 343 PM MDT, Doppler radar was tracking a strong thunderstorm near
Lafayette, or 20 miles north of Denver, moving southeast at 20 mph.

HAZARD...Winds in excess of 40 mph and half inch 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...
Thornton, Broomfield, Northglenn, Lafayette, Louisville, Erie,
Federal Heights.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4000 10505 4001 10499 4002 10500 4003 10497
      4004 10498 4005 10497 4004 10496 4000 10496
      4000 10492 3995 10486 3985 10504 4001 10514
      4007 10506
TIME...MOT...LOC 2143Z 316DEG 16KT 4001 10507

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

SCHLATTER

Special weather statement, Jul 26, 4:40 PM MDT, 2 hours 1 minute before

Special Weather Statement
National Weather Service Denver CO
440 PM MDT Tue Jul 26 2022

COZ040-262330-
North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
440 PM MDT Tue Jul 26 2022

...A strong thunderstorm will impact portions of western Arapahoe,
central Denver and southwestern Adams Counties through 530 PM MDT...

At 440 PM MDT, Doppler radar was tracking a strong thunderstorm over
northwestern Aurora, or 6 miles east of Denver, moving southeast at
20 mph.

HAZARD...Winds in excess of 40 mph and half inch 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...
Eastern Denver, Aurora, eastern Centennial, southwestern Commerce
City, Arapahoe Park and Buckley AFB.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3979 10496 3984 10479 3966 10455 3961 10468
      3961 10473 3959 10474 3956 10482
TIME...MOT...LOC 2240Z 320DEG 18KT 3976 10483

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

SCHLATTER

Special weather statement, Jul 26, 5:09 PM MDT, 1 hour 32 minutes before

Special Weather Statement
National Weather Service Denver CO
509 PM MDT Tue Jul 26 2022

COZ036-039-040-270000-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County
CO-
North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
Jefferson and West Douglas Counties Above  6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet CO-
509 PM MDT Tue Jul 26 2022

...A strong thunderstorm will impact portions of north central
Douglas, southwestern Denver and central Jefferson Counties through
600 PM MDT...

At 509 PM MDT, Doppler radar was tracking a strong thunderstorm over
Tiny Town, or 17 miles southwest of Denver, moving east at 10 mph.

HAZARD...Winds in excess of 40 mph and half inch 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...
Southwestern Denver, southern Lakewood, northwestern Highlands Ranch,
Littleton, western Englewood, Evergreen, Roxborough Park, Sheridan,
Morrison, Idledale, Tiny Town, Chatfield Reservoir, Kittredge, Red
Rocks Park, Indian Hills and Aspen Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3954 10535 3969 10534 3967 10500 3946 10504
TIME...MOT...LOC 2309Z 269DEG 9KT 3960 10523

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

SCHLATTER

Local storm report, Jul 26, 6:16 PM MDT, 25 minutes before

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Local storm report, Jul 26, 6:26 PM MDT, 15 minutes before

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Special weather statement, Jul 26, 6:29 PM MDT, 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 6:29 PM MDT	Special Weather Statement	BOU	Lincoln	46 min
Jul 26, 6:50 PM MDT	Areal Flood Advisory	BOU	Douglas	115 min
Jul 26, 7:24 PM MDT	Special Weather Statement	BOU	Lincoln	66 min
Jul 26, 8:28 PM MDT	Special Weather Statement	BOU	Broomfield	32 min
Jul 26, 8:45 PM MDT	Special Weather Statement	BOU	Denver	30 min
Jul 26, 9:37 PM MDT	Areal Flood Advisory	BOU	Douglas, Jefferson	3 hr
Jul 26, 10:48 PM MDT	Areal Flood Advisory	BOU	Adams, Denver, Jefferson	87 min
Jul 26, 11:12 PM MDT	Areal Flood Advisory	BOU	Douglas	2 hr
Jul 26, 11:22 PM MDT	Areal Flood Advisory	BOU	Arapahoe, Denver, Jefferson	113 min
Jul 26, 11:30 PM MDT	Areal Flood Advisory	BOU	Boulder, Weld	105 min
Jul 27, 2:27 PM MDT	Areal Flood Advisory	BOU	Larimer	3 hr
Jul 27, 2:35 PM MDT	Special Weather Statement	BOU	Arapahoe	115 min
Jul 27, 2:43 PM MDT	Flash Flood Watch	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	31 hr
Jul 27, 4:15 PM MDT	Special Weather Statement	BOU	Arapahoe	45 min
Jul 27, 4:24 PM MDT	Severe Thunderstorm Warning	BOU	Weld	51 min
Jul 27, 5:10 PM MDT	Special Weather Statement	BOU	Weld	50 min
Jul 27, 5:25 PM MDT	Severe Thunderstorm Warning	BOU	Weld	50 min
Jul 27, 5:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Weld	29 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2022 Every severe thunderstorm warning in 2022

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; radar from the NEXRAD Level II archive.