Alert archive / Colorado / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 224, NWS Denver/Boulder, CO

August 7, 2024Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 7, 2024, 6:44 PM MDT for Lincoln County, Colorado. It was in force for 31 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 7, 2024, 6:44 PM MDT (00:44 UTC)
Expired: Aug 7, 2024, 7:15 PM MDT
In force: 31 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.0 in
Wind: 70.0 mph

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 82 km from the middle of the area, began a volume at 00:44 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: 1647 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 2447 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.9

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 7, 5:18 PM MDT, 1 hour 26 minutes earlier.

Area forecast discussion, Aug 7, 5:18 PM MDT, 1 hour 26 minutes before

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Hazardous weather outlook, Aug 7, 11:08 AM MDT, 7 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1108 AM MDT Wed Aug 7 2024

COZ030>051-081715-
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-
1108 AM MDT Wed Aug 7 2024

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

.DAY ONE...Today and Tonight

Scattered afternoon and evening thunderstorms are expected again.
There will be an elevated threat of flash flooding on the recent
burn areas as storms that form will produce heavy rainfall. A few
severe thunderstorms will be possible over the northeast plains
with hail up to one inch in diameter and 60 mph wind gusts.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thursday through this weekend, scattered to numerous showers and
thunderstorms can be expected each afternoon. The primary threat
from these storms will be locally heavy rainfall and flash flooding
over recent burn areas. Isolated storms could also become strong
to severe producing hail and strong wind gusts mainly along the
plains, mainly Friday into early next week. It will be much cooler
Thursday, then a gradual warming trend through the middle of next
week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

In the hours before

Local storm report, Aug 7, 4:04 PM MDT, 2 hours 40 minutes before

Preliminary Local Storm Report...Summary
National Weather Service Denver CO
404 PM MDT Wed Aug 7 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0333 PM     Non-Tstm Wnd Gst 1 W Masters             40.29N 104.26W
08/07/2024  M63 MPH          Weld               CO   Mesonet

            Mesonet station CO222 Dearfield.

0225 PM     Hail             Nunn                    40.70N 104.78W
08/07/2024  M1.75 Inch       Weld               CO   Public

0208 PM     Non-Tstm Wnd Gst Nunn                    40.71N 104.78W
08/07/2024  M61 MPH          Weld               CO   Mesonet

            Mesonet station CO171 Nunn.

0206 PM     Non-Tstm Wnd Gst 5 NNW Nunn              40.77N 104.81W
08/07/2024  M62 MPH          Weld               CO   Mesonet

            Mesonet station UP718 4.9 N Nunn (UPR).

&&

Local storm report, Aug 7, 4:18 PM MDT, 2 hours 26 minutes before

Preliminary Local Storm Report...Summary
National Weather Service Denver CO
418 PM MDT Wed Aug 7 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0405 PM     Hail             3 NE Roggen             40.20N 104.33W
08/07/2024  E0.75 Inch       Weld               CO   Public

            Report from mPING: Dime (0.75 in.).

0333 PM     Tstm Wnd Gst     1 W Masters             40.29N 104.26W
08/07/2024  M63 MPH          Weld               CO   Mesonet

            Corrects previous non-tstm wnd gst report
            from 1 W Masters. Mesonet station CO222
            Dearfield.

0225 PM     Hail             Nunn                    40.70N 104.78W
08/07/2024  M1.75 Inch       Weld               CO   Public

0208 PM     Tstm Wnd Gst     Nunn                    40.71N 104.78W
08/07/2024  M61 MPH          Weld               CO   Mesonet

            Corrects previous non-tstm wnd gst report
            from Nunn. Mesonet station CO171 Nunn.

0206 PM     Tstm Wnd Gst     5 NNW Nunn              40.77N 104.81W
08/07/2024  M62 MPH          Weld               CO   Mesonet

            Corrects previous non-tstm wnd gst report
            from 5 NNW Nunn. Mesonet station UP718 4.9 N
            Nunn (UPR).

&&

Local storm report, Aug 7, 4:52 PM MDT, 1 hour 52 minutes before

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Local storm report, Aug 7, 5:12 PM MDT, 1 hour 32 minutes before

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Local storm report, Aug 7, 5:21 PM MDT, 1 hour 23 minutes before

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Local storm report, Aug 7, 5:24 PM MDT, 1 hour 20 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
Aug 7, 6:54 PM MDT	Areal Flood Advisory	BOU	Elbert, Lincoln	2 hr
Aug 8, 5:07 PM MDT	Flash Flood Warning Considerable damage threat	BOU	Jefferson	2 hr

Nearby

Severe Thunderstorm Warnings in Colorado, 2024 Every 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.