Alert archive / Wyoming / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 283, NWS Cheyenne, WY

July 14, 2023Albany County, Converse County, Platte County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 14, 2023, 5:41 PM MDT for Albany County, Converse County, Platte County, Wyoming. It was in force for 34 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 14, 2023, 5:41 PM MDT (23:41 UTC)
Expired: Jul 14, 2023, 6:15 PM MDT
In force: 34 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Albany County, WY, Converse County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 132 km from the middle of the area, began a volume at 23:45 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.7 hours before the alert went out and 418 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: 1423 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 1385 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

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 14, 5:26 PM MDT, 15 minutes earlier.

Area forecast discussion, Jul 14, 5:26 PM MDT, 15 minutes before

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In the hours before

Special weather statement, Jul 14, 4:17 PM MDT, 1 hour 24 minutes before

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Special weather statement, Jul 14, 4:23 PM MDT, 1 hour 18 minutes before

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Special weather statement, Jul 14, 4:27 PM MDT, 1 hour 14 minutes before

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Special weather statement, Jul 14, 5:11 PM MDT, 30 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
511 PM MDT Fri Jul 14 2023

NEZ054-055-142345-
Kimball NE-Cheyenne NE-
511 PM MDT Fri Jul 14 2023

...A strong thunderstorm will impact portions of southwestern
Cheyenne and southeastern Kimball Counties through 545 PM MDT...

At 510 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles southeast of Kimball Airport, or 14 miles south of Kimball,
moving east at 25 mph.

HAZARD...Winds in excess of 30 mph and penny size hail.

SOURCE...Radar indicated.

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

This storm will remain over mainly rural areas of southwestern
Cheyenne and southeastern Kimball Counties.

This includes Interstate 80 in Nebraska between mile markers 55 and
56.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Cheyenne.

&&

LAT...LON 4113 10356 4113 10300 4100 10312 4101 10369
TIME...MOT...LOC 2310Z 278DEG 22KT 4104 10357

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...30 MPH

Claycomb

Local storm report, Jul 14, 5:16 PM MDT, 25 minutes before

Preliminary Local Storm Report
National Weather Service Cheyenne WY
516 PM MDT Fri Jul 14 2023

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

0418 PM     Hail             6 SSW Jay Em            42.38N 104.40W
07/14/2023  E0.50 inch       Goshen             WY   Public

&&

Special weather statement, Jul 14, 5:32 PM MDT, 9 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
532 PM MDT Fri Jul 14 2023

WYZ117-118-150000-
Central Laramie County WY-South Laramie Range Foothills WY-
532 PM MDT Fri Jul 14 2023

...A strong thunderstorm will impact portions of southwestern Laramie
County through 600 PM MDT...

At 532 PM MDT, trained weather spotters reported a strong
thunderstorm near Warren AFB, or 8 miles west of Cheyenne, moving
east at 25 mph.

HAZARD...Winds in excess of 30 mph and nickel size hail.

SOURCE...Trained weather spotters.

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

Locations impacted include...
Cheyenne, South Greeley, Warren AFB, Frontier Park, Warren Af Base,
Ranchettes, Fox Farm-College and South Greeley High.

This includes the following highways...
 Interstate 25 in Wyoming between mile markers 2 and 14.
 Interstate 80 in Wyoming between mile markers 350 and 369.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Cheyenne.

&&

LAT...LON 4114 10511 4122 10499 4115 10467 4100 10486
TIME...MOT...LOC 2332Z 287DEG 23KT 4115 10496

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...30 MPH

Claycomb

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 1:20 PM MDT	Special Weather Statement	CYS	Platte	40 min
Jul 14, 1:57 PM MDT	Special Weather Statement	CYS	Platte	33 min
Jul 14, 2:07 PM MDT	Special Weather Statement	CYS	Converse	38 min
Jul 14, 2:15 PM MDT	Severe Thunderstorm Warning	CYS	Converse	30 min
Jul 14, 2:22 PM MDT	Special Weather Statement	CYS	Laramie	38 min
Jul 14, 2:33 PM MDT	Special Weather Statement	CYS	Platte	27 min
Jul 14, 2:48 PM MDT	Severe Thunderstorm Warning	CYS	Platte	42 min
Jul 14, 2:53 PM MDT	Special Weather Statement	CYS	Converse	37 min
Jul 14, 3:18 PM MDT	Special Weather Statement	CYS	Platte	27 min
Jul 14, 3:29 PM MDT	Special Weather Statement	CYS	Laramie	31 min
Jul 14, 3:33 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Platte	27 min
Jul 14, 4:00 PM MDT	Special Weather Statement	CYS	Laramie	30 min
Jul 14, 4:02 PM MDT	Special Weather Statement	CYS	Goshen	28 min
Jul 14, 4:23 PM MDT	Special Weather Statement	CYS	Laramie	37 min
Jul 14, 4:27 PM MDT	Special Weather Statement	CYS	Converse	33 min
Jul 14, 4:55 PM MDT	Severe Thunderstorm Warning	CYS	Converse	20 min
Jul 14, 5:32 PM MDT	Special Weather Statement	CYS	Laramie	28 min
Jul 13, 11:14 PM MDT	Special Weather Statement	CYS	Morrill	31 min
Jul 13, 11:26 PM MDT	Special Weather Statement	CYS	Morrill	19 min
Jul 13, 11:44 PM MDT	Severe Thunderstorm Warning	CYS	Morrill, Scotts Bluff	31 min
Jul 13, 11:51 PM MDT	Special Weather Statement	CYS	Morrill	24 min
Jul 13, 11:59 PM MDT	Special Weather Statement	CYS	Morrill	31 min
Jul 14, 12:16 AM MDT	Special Weather Statement	CYS	Morrill	29 min
Jul 14, 12:17 AM MDT	Severe Thunderstorm Warning	CYS	Morrill, Scotts Bluff	28 min
Jul 14, 3:42 AM MDT	Special Weather Statement	CYS	Dawes	33 min
Jul 14, 4:16 AM MDT	Special Weather Statement	CYS	Box Butte	29 min
Jul 14, 6:44 AM MDT	Special Weather Statement	CYS	Box Butte	31 min
Jul 14, 3:39 PM MDT	Special Weather Statement	CYS	Kimball	36 min
Jul 14, 4:17 PM MDT	Special Weather Statement	CYS	Kimball	28 min
Jul 14, 5:11 PM MDT	Special Weather Statement	CYS	Cheyenne	34 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2023 Every severe thunderstorm warning in 2023

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.