Alert archive / Colorado / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 175, NWS Denver/Boulder, CO

July 7, 2024Morgan County, Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 7, 2024, 2:23 PM MDT for Morgan County, Weld County, Colorado. It was in force for 37 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 7, 2024, 2:23 PM MDT (20:23 UTC)
Expired
Jul 7, 2024, 3:00 PM MDT
In force
37 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Morgan County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 79 km from the middle of the area, began a volume at 20:24 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, 8.4 hours before the alert went out and 402 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 2024-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2024-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4285 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
281 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 Jul 7, 11:43 AM MDT, 2 hours 40 minutes earlier.

Area forecast discussion, Jul 7, 11:43 AM MDT, 2 hours 40 minutes before
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Hazardous weather outlook, Jul 7, 10:40 AM MDT, 3 hours 43 minutes before
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1040 AM MDT Sun Jul 7 2024

COZ030>051-081645-
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-
1040 AM MDT Sun Jul 7 2024

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

.DAY ONE...Today and Tonight

Early morning thunderstorms are possible for the northeastern
corner of Colorado. There will be scattered storms this afternoon,
initiating over the higher terrain and then drifting southeastward
into the I-25 corridor and plains. There is increasing potential
for thunderstorms to become strong to severe late this afternoon
and evening, particularly for areas east and southeast of Denver
(rural Adams/Arapahoe Counties, Elbert and Lincoln Counties).
Large hail 1-2 inches in diameter will be the biggest threat with
any stronger severe thunderstorms. Additionally, we will see a
limited threat for flash flooding on the Cameron Peak burn scar
this afternoon.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

For the early part of the coming week, it will be warmer with
scattered thunderstorms over the Front Range mountains and foothills.
The threat of severe storms is low. Later in the week it will be
hot with limited afternoon thunderstorm coverage mainly west of
the Divide. Near record temperatures in the mid 90s to around 100
are possible from Friday into the weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

In the hours before

Special weather statement, Jul 7, 2:02 PM MDT, 21 minutes before
Special Weather Statement
National Weather Service Denver CO
202 PM MDT Sun Jul 7 2024

COZ042>044-072045-
Central and South Weld County CO-Morgan County CO-
Northeast Weld County CO-
202 PM MDT Sun Jul 7 2024

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL WELD AND NORTHWESTERN
MORGAN COUNTIES THROUGH 245 PM MDT...

At 202 PM MDT, Doppler radar was tracking a strong thunderstorm 6
miles northeast of Barnesville, or 20 miles east of Greeley, moving
southeast at 30 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 hail damage to vegetation is
         possible.

Locations impacted include...
Orchard, Weldona, Jackson Reservoir, Riverside Reservoir, Briggsdale,
Goodrich, Barnesville, and Roggen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4053 10457 4067 10434 4038 10379 4012 10435
TIME...MOT...LOC 2002Z 322DEG 25KT 4053 10438

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

SCHLATTER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 6:07 PM MDTSpecial Weather StatementBOUPhillips38 min
Jul 6, 6:19 PM MDTSevere Thunderstorm WarningBOUPhillips26 min
Jul 6, 8:45 PM MDTSpecial Weather StatementBOUWeld45 min
Jul 7, 2:02 PM MDTSpecial Weather StatementBOUWeld43 min
Jul 7, 2:47 PM MDTSevere Thunderstorm WarningBOUAdams, Morgan, Washington28 min
Jul 7, 2:53 PM MDTSpecial Weather StatementBOUBoulder52 min
Jul 7, 3:11 PM MDTSpecial Weather StatementBOUMorgan49 min
Jul 7, 3:38 PM MDTSpecial Weather StatementBOULincoln52 min
Jul 7, 3:39 PM MDTSpecial Weather StatementBOUWashington36 min
Jul 7, 4:03 PM MDTSevere Thunderstorm WarningBOULincoln, Washington42 min
Jul 7, 4:10 PM MDTSpecial Weather StatementBOUAdams35 min
Jul 7, 4:14 PM MDTSevere Thunderstorm WarningBOULincoln27 min
Jul 7, 5:01 PM MDTSpecial Weather StatementBOUArapahoe29 min
Jul 7, 5:37 PM MDTSevere Thunderstorm WarningBOUElbert23 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2024Every severe thunderstorm warning 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.