Alert archive / Wyoming / Special Weather Statements in 2020

Special Weather Statement, NWS Cheyenne, WY

July 13, 2020Albany County, Wyoming

NWS Cheyenne, WY issued this special weather statement at Jul 13, 2020, 1:13 PM MDT for Albany 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 outline as issued.

The facts

Issued: Jul 13, 2020, 1:13 PM MDT (19:13 UTC)
Expired: Jul 13, 2020, 1:30 PM MDT
In force: 17 min
Issued by: NWS Cheyenne, WY

County Albany County, WY

The radar

The Cheyenne radar (KCYS), 100 km from the middle of the area, began a volume at 19:13 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

Riverton, WY (KRIW), launched 12:00Z, 7.2 hours before the alert went out and 270 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3867 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 13, 12:03 PM MDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jul 13, 12:03 PM MDT, 1 hour 10 minutes before

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Hazardous weather outlook, Jul 13, 4:24 AM MDT, 8 hours 49 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
424 AM MDT Mon Jul 13 2020

NEZ002-003-019>021-054-055-095-096-WYZ101>103-105>108-115>119-
141030-
Dawes-Box Butte-Scotts Bluff County-Banner County-Morrill-
Kimball County-Cheyenne-North Sioux-South Sioux-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Shirley Basin-
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-
424 AM MDT Mon Jul 13 2020

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

.DAY ONE...TODAY AND TONIGHT

Scattered to numerous showers and thunderstorms are expected over
the area this afternoon and tonight. Some thunderstorms may
become strong to severe mainly over the Panhandle with hail and
gusty winds the main threat.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

The probability for widespread hazardous weather is low.

.Spotter information statement...

Spotter activation is not expected.

WYZ104-109>114-141030-
Ferris/Seminoe/Shirley Mountains-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
424 AM MDT Mon Jul 13 2020

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

.DAY ONE...TODAY AND TONIGHT

Widely scattered showers and thunderstorms are possible this
afternoon and evening.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

The probability for widespread hazardous weather is low.

.Spotter information statement...

Spotter activation will not be needed.

In the hours before

Special weather statement, Jul 13, 12:00 PM MDT, 1 hour 13 minutes before

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Special weather statement, Jul 13, 12:29 PM MDT, 44 minutes before

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Special weather statement, Jul 13, 12:41 PM MDT, 32 minutes before

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Special weather statement, Jul 13, 12:52 PM MDT, 21 minutes before

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Special weather statement, Jul 13, 1:13 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
113 PM MDT Mon Jul 13 2020

WYZ110-115-131930-
North Snowy Range Foothills WY-Laramie Valley WY-
113 PM MDT Mon Jul 13 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ALBANY COUNTY UNTIL 130
PM MDT...

At 113 PM MDT, Doppler radar was tracking a strong thunderstorm 13
miles southwest of Bosler, or 21 miles northwest of Laramie, moving
east at 35 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

This storm will remain over mainly rural areas of central Albany
County.

This includes Interstate 80 in Wyoming between mile markers 285 and
293.

LAT...LON 4144 10597 4146 10603 4153 10603 4157 10576
      4141 10575
TIME...MOT...LOC 1913Z 269DEG 31KT 4149 10592

Mokry

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 6:16 PM MDT	Special Weather Statement	CYS	Laramie	29 min
Jul 12, 6:46 PM MDT	Special Weather Statement	CYS	Laramie	29 min
Jul 13, 12:00 PM MDT	Special Weather Statement	CYS	Albany	30 min
Jul 13, 12:29 PM MDT	Special Weather Statement	CYS	Albany	16 min
Jul 13, 12:41 PM MDT	Special Weather Statement	CYS	Laramie	19 min
Jul 13, 12:52 PM MDT	Special Weather Statement	CYS	Laramie	23 min
Jul 13, 1:15 PM MDT	Special Weather Statement	CYS	Laramie	30 min
Jul 13, 1:16 PM MDT	Special Weather Statement	CYS	Laramie	14 min
Jul 13, 1:29 PM MDT	Special Weather Statement	CYS	Albany	16 min
Jul 13, 1:39 PM MDT	Special Weather Statement	CYS	Laramie	21 min
Jul 13, 2:26 PM MDT	Severe Thunderstorm Warning	CYS	Carbon	19 min
Jul 13, 2:45 PM MDT	Special Weather Statement	CYS	Laramie	30 min
Jul 13, 3:04 PM MDT	Special Weather Statement	CYS		26 min
Jul 13, 3:16 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Carbon	29 min
Jul 13, 3:27 PM MDT	Special Weather Statement	CYS	Laramie	48 min
Jul 13, 3:41 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Laramie, Platte	49 min
Jul 13, 4:05 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie, Platte	40 min
Jul 13, 4:44 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	31 min
Jul 13, 3:18 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Kimball	42 min

Nearby

Special Weather Statements in Wyoming, 2020 Every special weather statement in 2020

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.