Alert archive / Wyoming / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 110, NWS Cheyenne, WY

July 18, 2024Goshen County, Laramie County, Wyoming; Banner County, Kimball County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 18, 2024, 6:10 PM MDT for Goshen County, Laramie County, Wyoming; Banner County, Kimball County, Nebraska. It was in force for 35 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 18, 2024, 6:10 PM MDT (00:10 UTC)
Expired
Jul 18, 2024, 6:45 PM MDT
In force
35 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Banner County, NE, Kimball County, NE, Goshen County, WY, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 72 km from the middle of the area, began a volume at 00:12 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

Rapid City, SD (KUNR), launched 00:00Z, 0.2 hours before the alert went out and 299 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, Rapid City, SD at 00:00Z on 2024-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 271 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, Rapid City, SD at 00:00Z on 2024-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.193958Sfc1 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
271 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
2939 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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 Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 5:33 PM MDT, 37 minutes earlier.

Area forecast discussion, Jul 18, 5:33 PM MDT, 37 minutes before
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Hazardous weather outlook, Jul 18, 3:55 AM MDT, 14 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Cheyenne WY
355 AM MDT Thu Jul 18 2024

NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-117>119-
191000-
Dawes County-Box Butte County-Scotts Bluff County-Banner County-
Morrill County-Kimball County-Cheyenne County-
Northern Sioux County-Southern Sioux County-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
355 AM MDT Thu Jul 18 2024

This hazardous weather outlook is for portions of panhandle
Nebraska...east central Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Severe weather potential for Thursday and Friday, with Friday
looking to be the better day.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

Cooler weather expected this weekend with daily chances of storms
through early next week.

.Spotter information statement...

Spotter activation will not be needed.

WYZ104-105-109>116-191000-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Carbon County-North Snowy Range Foothills-
Southwest Carbon County-Sierra Madre Range-
Upper North Platte River Basin-Snowy Range-Laramie Valley-
South Laramie Range-
355 AM MDT Thu Jul 18 2024

This hazardous weather outlook is for portions of south central
Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Warm today with showers possible in the afternoon across the
higher terrain.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

Cooler weather expected this weekend with daily chances of storms
through early next week.

.Spotter information statement...

Spotter activation will not be needed.

In the hours before

Special weather statement, Jul 18, 3:38 PM MDT, 2 hours 32 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
338 PM MDT Thu Jul 18 2024

WYZ116>118-182215-
South Laramie Range WY-Central Laramie County WY-
South Laramie Range Foothills WY-
338 PM MDT Thu Jul 18 2024

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN LARAMIE COUNTY
THROUGH 415 PM MDT...

At 337 PM MDT, Doppler radar was tracking a strong thunderstorm near
Table Mountain Ranches, or 17 miles west of Cheyenne, moving
southeast at 15 mph.

HAZARD...Wind gusts up to 50 mph and half inch 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...
Happy Valley, Federal, Table Mountain Ranches, Willadsen Estates,
Granite Canon, Granite Springs Reservoir, Crystal Lake Reservoir,
Curt Gowdy State Park, Pine Grove Estates, Granite Springs Retreat,
Harriman Heights, and Cheyenne Pass.

This includes the following highways...
 Interstate 25 in Wyoming between mile markers 1 and 5.
 Interstate 80 in Wyoming between mile markers 338 and 356.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4121 10528 4129 10510 4100 10479 4100 10525
TIME...MOT...LOC 2137Z 319DEG 14KT 4118 10513

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Trudel
Special weather statement, Jul 18, 4:41 PM MDT, 1 hour 29 minutes before
Special Weather Statement
National Weather Service Cheyenne WY
441 PM MDT Thu Jul 18 2024

WYZ106-116>118-182315-
South Laramie Range WY-
Central Laramie Range and Southwest Platte County WY-
Central Laramie County WY-South Laramie Range Foothills WY-
441 PM MDT Thu Jul 18 2024

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN ALBANY AND
NORTHWESTERN LARAMIE COUNTIES THROUGH 515 PM MDT...

At 441 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles north of Horse Creek, or 28 miles northeast of Laramie, moving
southeast at 15 mph.

HAZARD...Wind gusts up to 50 mph and penny 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...
Federal, Table Mountain Ranches, Whitaker, and Horse Creek.

This includes Interstate 25 in Wyoming between mile markers 28 and
41.

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 4145 10535 4165 10511 4151 10463 4121 10519
TIME...MOT...LOC 2241Z 320DEG 12KT 4153 10512

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

Trudel
Local storm report, Jul 18, 5:25 PM MDT, 45 minutes before
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Special weather statement, Jul 18, 5:29 PM MDT, 41 minutes before
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Special weather statement, Jul 18, 5:54 PM MDT, 16 minutes before
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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 19, 2:41 PM MDTSpecial Weather StatementCYSCarbon49 min
Jul 19, 2:52 PM MDTSpecial Weather StatementCYSLaramie8 min
Jul 19, 3:06 PM MDTSpecial Weather StatementCYSAlbany39 min
Jul 19, 3:27 PM MDTSpecial Weather StatementCYSAlbany48 min
Jul 19, 4:21 PM MDTSpecial Weather StatementCYSAlbany39 min
Jul 19, 5:21 PM MDTSpecial Weather StatementCYSLaramie24 min
Jul 19, 5:48 PM MDTSpecial Weather StatementCYSPlatte42 min
Jul 19, 5:55 PM MDTSevere Thunderstorm WarningCYSGoshen, Laramie, Platte50 min
Jul 18, 6:45 PM MDTSpecial Weather StatementCYSBanner45 min
Jul 18, 7:33 PM MDTSpecial Weather StatementCYSKimball42 min
Jul 19, 3:40 PM MDTSevere Thunderstorm WarningCYSDawes50 min
Jul 19, 4:29 PM MDTSevere Thunderstorm WarningCYSDawes25 min
Jul 19, 5:00 PM MDTSpecial Weather StatementCYSBox Butte30 min
Jul 19, 5:15 PM MDTSevere Thunderstorm WarningCYSBox Butte34 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2024Severe Thunderstorm Warnings in Nebraska, 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.