Alert archive / Colorado / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 86, NWS Denver/Boulder, CO

July 10, 2022Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 10, 2022, 2:47 PM MDT for Weld County, Colorado. It was in force for 43 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 10, 2022, 2:47 PM MDT (20:47 UTC)
Expired
Jul 10, 2022, 3:30 PM MDT
In force
43 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 75 km from the middle of the area, began a volume at 20:47 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.8 hours before the alert went out and 325 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, N. Platte/Lee Bi, NE at 12:00Z on 2022-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 587 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, N. Platte/Lee Bi, NE at 12:00Z on 2022-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 295 square meters per square second.193958Sfc1 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
587 J/kg
Mixed-layer CIN
-475 J/kg
Mixed-layer LCL
2392 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
295 m²/s²
0-3 km storm-relative helicity
247 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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 10, 8:09 AM MDT, 6 hours 38 minutes earlier.

Area forecast discussion, Jul 10, 8:09 AM MDT, 6 hours 38 minutes before
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Hazardous weather outlook, Jul 10, 9:38 AM MDT, 5 hours 9 minutes before
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
938 AM MDT Sun Jul 10 2022

COZ030>051-111545-
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-
938 AM MDT Sun Jul 10 2022

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

Hot temperatures are expected across the forecast area today;
especially over the plains where readings will be well above
seasonal normals. Over the northeast corner, the hottest
temperatures are expected with readings just over 100 degrees. A
Heat Advisory will be in effect there until 8 PM MDT.

Isolated to scattered showers and thunderstorms are expected this
afternoon into this evening, more numerous over northern border
areas with Wyoming and Nebraska and over the mountains, especially
along and south of the Interstate 70 corridor. The storms will
produce limited rainfall but wind gusts up around 55 mph with the
stronger storms. There is a low threat of alpine burn scar
flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A cold front arrives Monday which will slightly decrease
temperatures across the region. Slow moving thunderstorms are
possible Monday and Tuesday afternoon which could bring a limited
threat of flash flooding to the burn areas. These storms will begin
in the mountains and valleys pushing eastward near the Palmer
Divide, I-25 corridor, and plains. Wednesday, drier conditions
should decrease thunderstorm coverage across the region meaning an
isolated thunderstorm cannot be ruled out mainly for areas south
of I-70. An unsettle pattern of scattered to widespread
thunderstorms begins Friday through next weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

In the hours before

Special weather statement, Jul 10, 1:24 PM MDT, 1 hour 23 minutes before
Special Weather Statement
National Weather Service Denver CO
124 PM MDT Sun Jul 10 2022

COZ046-102015-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County CO-
124 PM MDT Sun Jul 10 2022

...A strong thunderstorm will impact portions of east central Elbert
County through 215 PM MDT...

At 124 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Matheson, or 14 miles west of Limon, moving east at 15
mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

This storm will remain over mainly rural areas of east central Elbert
County, which includes Cedar Point.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3923 10399 3924 10403 3923 10405 3924 10406
      3931 10407 3931 10404 3933 10403 3935 10404
      3933 10405 3932 10407 3935 10408 3943 10375
      3922 10371 3922 10400
TIME...MOT...LOC 1924Z 259DEG 11KT 3930 10395

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

RODRIGUEZ
Special weather statement, Jul 10, 2:07 PM MDT, 40 minutes before
Special Weather Statement
National Weather Service Denver CO
207 PM MDT Sun Jul 10 2022

COZ038-102045-
Larimer County Below 6000 Feet/Northwest Weld County CO-
207 PM MDT Sun Jul 10 2022

...A strong thunderstorm will impact portions of north central Weld
County through 245 PM MDT...

At 206 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles northeast of Rockport, or 15 miles southeast of Cheyenne,
moving east at 25 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Hereford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare for sudden gusty winds. Secure loose objects and move to a
safe shelter inside a building or vehicle.

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4096 10428 4078 10436 4074 10441 4084 10472
      4100 10471 4100 10428
TIME...MOT...LOC 2006Z 274DEG 23KT 4097 10460

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

RODRIGUEZ
Special weather statement, Jul 10, 2:35 PM MDT, 12 minutes before
Special Weather Statement
National Weather Service Denver CO
235 PM MDT Sun Jul 10 2022

COZ041-046-047-102115-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County CO-
Southeast Elbert County Below 6000 Feet/South Lincoln County CO-
235 PM MDT Sun Jul 10 2022

...A strong thunderstorm will impact portions of southeastern Elbert
County through 315 PM MDT...

At 233 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Simla, or 22 miles southwest of Limon, moving
northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph and pea 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...
Simla and Matheson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3913 10405 3913 10410 3931 10381 3904 10371
      3888 10405
TIME...MOT...LOC 2033Z 231DEG 21KT 3905 10401

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

RODRIGUEZ
Special weather statement, Jul 10, 2:41 PM MDT, 6 minutes before
Special Weather Statement
National Weather Service Denver CO
241 PM MDT Sun Jul 10 2022

COZ038-042-102130-
Northeast Weld County CO-
Larimer County Below 6000 Feet/Northwest Weld County CO-
241 PM MDT Sun Jul 10 2022

...A strong thunderstorm will impact portions of northeastern Weld
County through 330 PM MDT...

At 241 PM MDT, Doppler radar was tracking a strong thunderstorm near
Hereford, or 30 miles southeast of Cheyenne, moving east at 25 mph.

HAZARD...Wind gusts up to 50 mph and pea 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...
Grover, Pawnee Buttes and Hereford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4074 10387 4079 10442 4100 10436 4100 10377
TIME...MOT...LOC 2041Z 278DEG 24KT 4092 10429

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

RODRIGUEZ

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 6:23 PM MDTSpecial Weather StatementBOUArapahoe22 min
Jul 9, 6:46 PM MDTSpecial Weather StatementBOUDenver44 min
Jul 9, 7:34 PM MDTSpecial Weather StatementBOUAdams, Arapahoe41 min
Jul 9, 7:55 PM MDTSevere Thunderstorm WarningBOUAdams35 min
Jul 9, 8:18 PM MDTSpecial Weather StatementBOUArapahoe27 min
Jul 10, 4:46 AM MDTHeat AdvisoryBOUPhillips, Sedgwick15 hr
Jul 10, 1:24 PM MDTSpecial Weather StatementBOUElbert51 min
Jul 10, 2:07 PM MDTSpecial Weather StatementBOUWeld38 min
Jul 10, 2:35 PM MDTSpecial Weather StatementBOUElbert40 min
Jul 10, 2:41 PM MDTSpecial Weather StatementBOUWeld49 min
Jul 10, 3:15 PM MDTSevere Thunderstorm WarningBOULogan, Weld45 min
Jul 10, 3:58 PM MDTSevere Thunderstorm WarningBOULogan47 min
Jul 10, 4:17 PM MDTSpecial Weather StatementBOUMorgan43 min
Jul 10, 4:30 PM MDTSevere Thunderstorm WarningBOULogan, Weld26 min
Jul 10, 4:43 PM MDTSevere Thunderstorm WarningBOULogan24 min
Jul 10, 5:18 PM MDTSpecial Weather StatementBOUPhillips42 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2022Every 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.