Alert archive / Colorado / Special Weather Statements in 2024

Special Weather Statement, NWS Denver/Boulder, CO

August 6, 2024Arapahoe County, Colorado

NWS Denver/Boulder, CO issued this special weather statement at Aug 6, 2024, 5:46 PM MDT for Arapahoe County, Colorado. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 6, 2024, 5:46 PM MDT (23:46 UTC)
Expired
Aug 6, 2024, 6:30 PM MDT
In force
44 min
Issued by
NWS Denver/Boulder, CO
Hail
0.25 in
Wind
55

County Arapahoe County, CO

The radar

The Denver radar (KFTG), 18 km from the middle of the area, began a volume at 23:49 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, 11.8 hours before the alert went out and 352 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 2024-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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 2024-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
12 J/kg
Mixed-layer CIN
-375 J/kg
Mixed-layer LCL
2072 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 6, 3:21 PM MDT, 2 hours 25 minutes earlier.

Area forecast discussion, Aug 6, 3:21 PM MDT, 2 hours 25 minutes before
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Hazardous weather outlook, Aug 6, 10:41 AM MDT, 7 hours 5 minutes before
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In the hours before

Special weather statement, Aug 6, 4:01 PM MDT, 1 hour 45 minutes before
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Special weather statement, Aug 6, 4:13 PM MDT, 1 hour 33 minutes before
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Special weather statement, Aug 6, 4:25 PM MDT, 1 hour 21 minutes before
Special Weather Statement
National Weather Service Denver CO
425 PM MDT Tue Aug 6 2024

COZ037-062315-
Central and Southeast Park County CO-
425 PM MDT Tue Aug 6 2024

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN PARK COUNTY THROUGH
515 PM MDT...

At 425 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Elevenmile Canyon Reservoir, or 29 miles west of
Colorado Springs, moving east at 20 mph.

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

SOURCE...Radar indicated.

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

This storm will remain over mainly rural areas of southeastern Park
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3871 10541 3888 10548 3893 10533 3872 10533
TIME...MOT...LOC 2225Z 252DEG 16KT 3882 10536

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

MENSCH
Special weather statement, Aug 6, 4:43 PM MDT, 1 hour 3 minutes before
Special Weather Statement
National Weather Service Denver CO
443 PM MDT Tue Aug 6 2024

COZ040-062330-
North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
443 PM MDT Tue Aug 6 2024

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN ARAPAHOE...CENTRAL
DENVER AND SOUTHWESTERN ADAMS COUNTIES THROUGH 530 PM MDT...

At 443 PM MDT, Doppler radar was tracking a strong thunderstorm near
Commerce City, or 10 miles north of Denver, moving southeast at 20
mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Northeastern Denver, northwestern Aurora, Thornton, Commerce City,
eastern Northglenn, Federal Heights, Denver International Airport,
and D.I.A Terminal and Concourses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3983 10502 3993 10495 3984 10462 3967 10478
TIME...MOT...LOC 2243Z 296DEG 17KT 3987 10491

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

MENSCH
Special weather statement, Aug 6, 5:35 PM MDT, 11 minutes before
Special Weather Statement
National Weather Service Denver CO
535 PM MDT Tue Aug 6 2024

COZ040-041-070015-
Elbert/Central and East Douglas Counties Above 6000 Feet CO-
North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe
Counties/East Broomfield County CO-
535 PM MDT Tue Aug 6 2024

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN DOUGLAS AND WESTERN
ARAPAHOE COUNTIES THROUGH 615 PM MDT...

At 535 PM MDT, Doppler radar was tracking a cluster of strong
thunderstorms over Arapahoe Park, or 15 miles east of Denver, moving
south at 15 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Southern Aurora, eastern Centennial, eastern Parker, and Arapahoe
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3966 10480 3971 10460 3955 10448 3949 10474
TIME...MOT...LOC 2335Z 341DEG 12KT 3964 10468

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

MENSCH
Special weather statement, Aug 6, 5:46 PM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 6:33 PM MDTSpecial Weather StatementBOUArapahoe42 min
Aug 6, 2:35 PM MDTSpecial Weather StatementBOUPark25 min
Aug 6, 3:16 PM MDTSpecial Weather StatementBOUBoulder44 min
Aug 6, 4:01 PM MDTSpecial Weather StatementBOUBroomfield44 min
Aug 6, 4:13 PM MDTSpecial Weather StatementBOUElbert47 min
Aug 6, 4:25 PM MDTSpecial Weather StatementBOUTeller50 min
Aug 6, 4:43 PM MDTSpecial Weather StatementBOUDenver47 min
Aug 6, 5:35 PM MDTSpecial Weather StatementBOUArapahoe40 min
Aug 6, 5:52 PM MDTSpecial Weather StatementBOUArapahoe38 min

Nearby

Special Weather Statements in Colorado, 2024Every special weather statement in 2024

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.