Alert archive / Colorado / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 187, NWS Denver/Boulder, CO

July 19, 2024Lincoln County, Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 19, 2024, 5:35 PM MDT for Lincoln County, Washington County, Colorado. It was in force for 25 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 19, 2024, 5:35 PM MDT (23:35 UTC)
Expired
Jul 19, 2024, 6:00 PM MDT
In force
25 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 107 km from the middle of the area, began a volume at 23:37 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 12:00Z, 11.6 hours before the alert went out and 355 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, Dodge City, at 12:00Z on 2024-07-19Temperature 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, Dodge City, at 12:00Z on 2024-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1445 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
225 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.3

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 19, 5:21 PM MDT, 14 minutes earlier.

Area forecast discussion, Jul 19, 5:21 PM MDT, 14 minutes before
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Hazardous weather outlook, Jul 19, 11:06 AM MDT, 6 hours 29 minutes before
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1106 AM MDT Fri Jul 19 2024

COZ030>051-201715-
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-
1106 AM MDT Fri Jul 19 2024

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

.DAY ONE...This Afternoon and Tonight

Scattered showers and thunderstorms are expected this afternoon
and evening across north central and northeast Colorado. There is
a slight chance of severe storms across the northeast corner of
Colorado, with hail up to the size of quarters and wind gusts to
60 mph possible with the strongest storms in the mid afternoon. A
limited threat exists for flash flooding over the burn scars.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

There will be scattered late day showers and thunderstorms across
the forecast area this weekend into early next week. Locally
heavy rainfall will be possible Sunday with a limited threat of
flash flooding across the burn scars. A gradual warming and drying
trend is expected next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected, but any reports of large hail
or gusty winds will be appreciated.

In the hours before

Special weather statement, Jul 19, 1:17 PM MDT, 4 hours 18 minutes before
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Special weather statement, Jul 19, 1:19 PM MDT, 4 hours 16 minutes before
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Special weather statement, Jul 19, 3:25 PM MDT, 2 hours 10 minutes before
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Special weather statement, Jul 19, 4:16 PM MDT, 1 hour 19 minutes before
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Special weather statement, Jul 19, 4:49 PM MDT, 46 minutes before
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Special weather statement, Jul 19, 5:28 PM MDT, 7 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 6:12 PM MDTSpecial Weather StatementBOUMorgan33 min
Jul 18, 6:36 PM MDTSpecial Weather StatementBOUElbert24 min
Jul 18, 7:00 PM MDTSpecial Weather StatementBOUElbert45 min
Jul 18, 7:05 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln, Washington40 min
Jul 18, 8:00 PM MDTSpecial Weather StatementBOULincoln30 min
Jul 18, 8:19 PM MDTSevere Thunderstorm WarningBOULincoln15 min
Jul 19, 12:09 PM MDTSevere Thunderstorm WarningBOUPhillips36 min
Jul 19, 12:58 PM MDTSpecial Weather StatementBOUBroomfield47 min
Jul 19, 1:17 PM MDTSpecial Weather StatementBOULarimer28 min
Jul 19, 1:19 PM MDTSpecial Weather StatementBOUBroomfield26 min
Jul 19, 1:21 PM MDTSevere Thunderstorm WarningBOUAdams, Weld24 min
Jul 19, 3:25 PM MDTSpecial Weather StatementBOUWeld35 min
Jul 19, 4:16 PM MDTSpecial Weather StatementBOUMorgan29 min
Jul 19, 4:49 PM MDTSpecial Weather StatementBOUMorgan, Washington41 min
Jul 19, 5:28 PM MDTSpecial Weather StatementBOUWashington47 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.