Alert archive / Wyoming / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 203, NWS Cheyenne, WY

July 5, 2019Goshen County, Wyoming

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 5, 2019, 6:26 PM MDT for Goshen County, Wyoming. It was in force for 17 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 5, 2019, 6:26 PM MDT (00:26 UTC)
Expired: Jul 5, 2019, 6:43 PM MDT
In force: 17 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Goshen County, WY

The radar

The Cheyenne radar (KCYS), 111 km from the middle of the area, began a volume at 00:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 5, 1:15 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.4 hours before the alert went out and 264 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: 1859 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1778 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 284 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 12.4

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 5, 5:57 PM MDT, 29 minutes earlier.

Area forecast discussion, Jul 5, 5:57 PM MDT, 29 minutes before

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Hazardous weather outlook, Jul 5, 3:36 PM MDT, 2 hours 50 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
336 PM MDT Fri Jul 5 2019

WYZ104-105-109>114-062145-
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-
336 PM MDT Fri Jul 5 2019

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

Severe Thunderstorm Watch remains in effect till 9 PM MDT this
evening. Isolated marginally severe thunderstorms are expected
this afternoon, mainly between 1 and 9 PM MDT. Some storms will
be capable of producing strong winds, small hail and heavy rain.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Chances for afternoon and evening thunderstorms will continue each
day, with strong to severe thunderstorms possible through the
weekend. Pattern change expected by mid next week.

.Spotter information statement...

Spotter activation will not be needed.

NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-115>119-
062145-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-Converse County Lower Elevations-
Niobrara County-North Laramie Range-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Laramie Valley-
South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
336 PM MDT Fri Jul 5 2019

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

Severe Thunderstorm Watch remains in effect till 9 PM MDT this
evening.

Isolated to scattered severe thunderstorms are expected this
afternoon, mainly between 1 and 8 PM MDT, east of the Laramie
Range. The main focus will be along the I-80 corridor. Severe
storms will be capable of producing large hail up to golf ball
size and damaging winds. A tornado or two cannot be ruled out.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Severe thunderstorms expected again Saturday over a similar are of
the region. Timing will be similar to today's. Chances for
afternoon and evening thunderstorms will continue into the
weekend. Pattern change expected by mid next week.

.Spotter information statement...

Spotters are asked to report hail, precipitation, and thunderstorm
wind damage to the Cheyenne, Wyoming National Weather Service.

In the hours before

Local storm report, Jul 5, 5:27 PM MDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
527 PM MDT FRI JUL 5 2019

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

0527 PM     HAIL             5 W LINGLE              42.14N 104.44W
07/05/2019  M2.00 INCH       GOSHEN             WY   LAW ENFORCEMENT

&&

WM

Local storm report, Jul 5, 5:40 PM MDT, 46 minutes before

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Special weather statement, Jul 5, 6:01 PM MDT, 25 minutes before

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Special weather statement, Jul 5, 6:02 PM MDT, 24 minutes before

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Local storm report, Jul 5, 6:14 PM MDT, 12 minutes before

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Local storm report, Jul 5, 6:25 PM MDT, 1 minute before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 6:02 PM MDT	Special Weather Statement	CYS	Goshen	28 min
Jul 5, 6:46 PM MDT	Special Weather Statement	CYS	Goshen	44 min
Jul 5, 7:28 PM MDT	Special Weather Statement	CYS	Laramie	47 min
Jul 5, 7:58 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	47 min
Jul 5, 8:19 PM MDT	Special Weather Statement	CYS	Laramie	41 min
Jul 5, 9:25 PM MDT	Special Weather Statement	CYS	Laramie	50 min
Jul 5, 9:53 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	52 min
Jul 5, 10:39 PM MDT	Special Weather Statement	CYS	Laramie	51 min
Jul 6, 12:54 PM MDT	Special Weather Statement	CYS		36 min
Jul 6, 2:52 PM MDT	Special Weather Statement	CYS		23 min
Jul 6, 2:56 PM MDT	Special Weather Statement	CYS		34 min
Jul 6, 4:05 PM MDT	Special Weather Statement	CYS		25 min
Jul 6, 4:30 PM MDT	Special Weather Statement	CYS		30 min
Jul 6, 4:39 PM MDT	Special Weather Statement	CYS	Albany	36 min
Jul 6, 4:54 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Carbon	37 min
Jul 6, 5:14 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Carbon	46 min
Jul 6, 5:41 PM MDT	Special Weather Statement	CYS	Platte	34 min
Jul 6, 5:58 PM MDT	Severe Thunderstorm Warning	CYS	Albany	47 min
Jul 5, 6:01 PM MDT	Special Weather Statement	CYS	Dawes	59 min
Jul 5, 7:14 PM MDT	Special Weather Statement	CYS	Box Butte	46 min
Jul 5, 8:42 PM MDT	Special Weather Statement	CYS	Scotts Bluff	48 min
Jul 5, 9:01 PM MDT	Special Weather Statement	CYS	Kimball	44 min
Jul 5, 10:30 PM MDT	Special Weather Statement	CYS	Cheyenne	45 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2019 Every severe thunderstorm warning in 2019

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.