Alert archive / Colorado / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 131, NWS Denver/Boulder, CO

August 14, 2022Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 14, 2022, 4:00 PM MDT for Weld County, Colorado. It was in force for 30 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
Aug 14, 2022, 4:00 PM MDT (22:00 UTC)
Expired
Aug 14, 2022, 4:30 PM MDT
In force
30 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Damage threat
Considerable
Hail
1.0 in
Wind
70.0 mph

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 75 km from the middle of the area, began a volume at 22:00 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

Grand Junction, CO (KGJT), launched 12:00Z, 10.0 hours before the alert went out and 385 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, Grand Junction, CO at 12:00Z on 2022-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Grand Junction, CO at 12:00Z on 2022-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
1 J/kg
Mixed-layer CIN
-240 J/kg
Mixed-layer LCL
2206 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Aug 14, 3:49 PM MDT, 11 minutes earlier.

Area forecast discussion, Aug 14, 3:49 PM MDT, 11 minutes before
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Hazardous weather outlook, Aug 14, 10:36 AM MDT, 5 hours 24 minutes before
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1036 AM MDT Sun Aug 14 2022

COZ030>051-151645-
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-
1036 AM MDT Sun Aug 14 2022

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

.DAY ONE...Today and Tonight

Late day showers and thunderstorms are likely in the mountains
and foothills. Some of the storms may produce heavy rainfall.
Flash flooding is possible, especially over the burned areas.
Scattered showers and storms can be expected over the plains.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There will be a higher risk of storms with locally heavy rainfall
and flash flooding Monday afternoon and evening. While burn areas
would be most at risk, the threat of flash flooding may also
spread into portions of the I-25 Urban Corridor and Palmer
Divide. The stronger storms could produce 2 inches of rain in 45
minutes. There is more uncertainty in the forecast roughly along
and northeast of a line from Estes Park to Boulder and Denver, as
instability may be limited in those areas.

A gradual drying trend is expected late Tuesday through Wednesday.
The weather looks mostly dry and warm Thursday and Friday, but
storm chances could increase next weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

In the hours before

Special weather statement, Aug 14, 1:25 PM MDT, 2 hours 35 minutes before
Special Weather Statement
National Weather Service Denver CO
125 PM MDT Sun Aug 14 2022

COZ035-142015-
Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
125 PM MDT Sun Aug 14 2022

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

At 125 PM MDT, Doppler radar was tracking a strong thunderstorm near
Rustic, or 27 miles northwest of Fort Collins, moving south at 5 mph.

HAZARD...Winds in excess of 30 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...
Rustic and Red Feather Lakes.

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 4082 10542 4063 10542 4065 10560 4066 10559
      4067 10561 4067 10562 4068 10562 4067 10563
      4082 10557
TIME...MOT...LOC 1925Z 003DEG 6KT 4074 10554

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

BOWEN
Special weather statement, Aug 14, 2:13 PM MDT, 1 hour 47 minutes before
Special Weather Statement
National Weather Service Denver CO
213 PM MDT Sun Aug 14 2022

COZ033-035-142100-
Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
South and East Jackson/Larimer/North and Northeast Grand/Northwest
Boulder Counties Above 9000 Feet CO-
213 PM MDT Sun Aug 14 2022

...A strong thunderstorm will impact portions of south central
Larimer and northwestern Boulder Counties through 300 PM MDT...

At 213 PM MDT, Doppler radar was tracking a strong thunderstorm near
Estes Park, or 27 miles southwest of Fort Collins, moving north at 10
mph.

HAZARD...Winds in excess of 30 mph and nickel 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...
Estes Park, Meeker Park, Longs Peak, Raymond and Allenspark.

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 4038 10538 4014 10534 4014 10550 4016 10550
      4018 10549 4018 10551 4017 10553 4019 10554
      4018 10557 4016 10558 4016 10559 4017 10568
      4039 10562
TIME...MOT...LOC 2013Z 200DEG 10KT 4034 10550

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...30 MPH

BOWEN
Special weather statement, Aug 14, 3:10 PM MDT, 50 minutes before
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Special weather statement, Aug 14, 3:17 PM MDT, 43 minutes before
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Special weather statement, Aug 14, 3:40 PM MDT, 20 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 6:23 PM MDTFlash Flood WarningBOULarimer3 hr
Aug 13, 6:59 PM MDTSpecial Weather StatementBOUDenver31 min
Aug 14, 11:45 AM MDTAreal Flood AdvisoryBOULarimer17 min
Aug 14, 12:02 PM MDTFlash Flood WarningBOULarimer3 hr
Aug 14, 1:25 PM MDTSpecial Weather StatementBOULarimer50 min
Aug 14, 1:37 PM MDTFlood WatchBOUArapahoe, Boulder, Clear Creek, Douglas, Elbert, Gilpin and 6 more30 hr
Aug 14, 2:01 PM MDTAreal Flood AdvisoryBOULarimer3 hr
Aug 14, 2:13 PM MDTSpecial Weather StatementBOUBoulder47 min
Aug 14, 2:29 PM MDTFlash Flood WarningBOULarimer3 hr
Aug 14, 3:10 PM MDTSpecial Weather StatementBOUDouglas50 min
Aug 14, 3:17 PM MDTSpecial Weather StatementBOUWeld58 min
Aug 14, 3:22 PM MDTSevere Thunderstorm WarningBOUWeld23 min
Aug 14, 3:40 PM MDTSpecial Weather StatementBOUBroomfield35 min
Aug 14, 4:57 PM MDTAreal Flood AdvisoryBOUWeld93 min
Aug 14, 5:03 PM MDTSpecial Weather StatementBOUWeld42 min
Aug 14, 5:54 PM MDTSpecial Weather StatementBOUAdams36 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.