Alert archive / Wyoming / Special Weather Statements in 2018

Special Weather Statement, NWS Cheyenne, WY

July 25, 2018Albany County, Wyoming

NWS Cheyenne, WY issued this special weather statement at Jul 25, 2018, 2:01 PM MDT for Albany County, Wyoming. It was in force for 44 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 25, 2018, 2:01 PM MDT (20:01 UTC)
Expired: Jul 25, 2018, 2:45 PM MDT
In force: 44 min
Issued by: NWS Cheyenne, WY

County Albany County, WY

The radar

The Cheyenne radar (KCYS), 93 km from the middle of the area, began a volume at 20:02 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, 8.0 hours before the alert went out and 272 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: 2088 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 109 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 25, 11:50 AM MDT, 2 hours 11 minutes earlier.

Area forecast discussion, Jul 25, 11:50 AM MDT, 2 hours 11 minutes before

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<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Jul 25, 4:01 AM MDT, 10 hours before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
401 AM MDT Wed Jul 25 2018

NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119-
261030-
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-South Laramie Range-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
401 AM MDT Wed Jul 25 2018

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

.DAY ONE...TODAY AND TONIGHT

Scattered thunderstorms will develop over the area this afternoon
and continue through this evening. A few strong storms are
possible with gusty winds and hail the main threats.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Scattered to numerous showers and thunderstorms are expected
Thursday through Sunday. Heavy rain is possible along with some
potential for strong storms Thursday and Friday.

.Spotter information statement...

Spotter activation is not expected at this time.

WYZ104-105-109>115-261030-
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-
401 AM MDT Wed Jul 25 2018

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

.DAY ONE...TODAY AND TONIGHT

Scattered thunderstorms will develop over the area this afternoon
and continue through early this evening. Severe storms are not
anticipated.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Scattered showers and thunderstorms are expected Thursday through
Sunday. Heavy rain is possible with stronger storms.

.Spotter information statement...

Spotter activation will not be needed.

In the hours before

Special weather statement, Jul 25, 1:07 PM MDT, 54 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
107 PM MDT WED JUL 25 2018

WYZ114-115-251945-
Laramie Valley WY-Snowy Range WY-
107 PM MDT WED JUL 25 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL ALBANY COUNTY UNTIL
145 PM MDT...

At 107 PM MDT, Doppler radar was tracking a strong thunderstorm near
Lake Hattie Reservoir, or 15 miles west of Laramie, moving southeast
at 25 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Lake Hattie Reservoir, Hutton Lake and The Buttes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4122 10598 4135 10591 4123 10552 4107 10572
TIME...MOT...LOC 1907Z 299DEG 21KT 4126 10587

Cox

Special weather statement, Jul 25, 1:48 PM MDT, 13 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
148 PM MDT WED JUL 25 2018

WYZ115-116-252030-
South Laramie Range WY-Laramie Valley WY-
148 PM MDT WED JUL 25 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ALBANY COUNTY UNTIL
230 PM MDT...

At 148 PM MDT, Doppler radar was tracking a strong thunderstorm near
Hutton Lake, or 10 miles south of Laramie, moving southeast at 20
mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Pumpkin Vine, Vedauwoo, The Buttes, Vedauwoo Campground and Tie
Siding.

This includes Interstate 80 in Wyoming between mile markers 328 and
333.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

A Severe Thunderstorm Watch remains in effect until 700 PM MDT for
southeastern Wyoming.

LAT...LON 4110 10576 4126 10564 4115 10532 4099 10548
      4100 10549
TIME...MOT...LOC 1948Z 297DEG 18KT 4116 10564

Cox

Special weather statement, Jul 25, 2:01 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
201 PM MDT WED JUL 25 2018

WYZ106-115-116-252045-
South Laramie Range WY-
Central Laramie Range and Southwest Platte County WY-
Laramie Valley WY-
201 PM MDT WED JUL 25 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ALBANY COUNTY UNTIL 245
PM MDT...

At 201 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles north of Bosler, or 28 miles north of Laramie, moving southeast
at 20 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Bosler and Baldy Peak.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

A Severe Thunderstorm Watch remains in effect until 700 PM MDT for
southeastern Wyoming.

LAT...LON 4171 10586 4182 10567 4158 10541 4147 10567
TIME...MOT...LOC 2001Z 324DEG 18KT 4171 10571

Cox

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 10:08 PM MDT	Special Weather Statement	CYS	Niobrara	37 min
Jul 25, 10:11 AM MDT	Flash Flood Watch	CYS	Albany, Carbon, Laramie	11 hr
Jul 25, 1:07 PM MDT	Special Weather Statement	CYS	Albany	38 min
Jul 25, 2:46 PM MDT	Special Weather Statement	CYS	Albany	44 min
Jul 25, 3:10 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Laramie	50 min
Jul 25, 3:17 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	43 min
Jul 25, 3:44 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	46 min
Jul 25, 4:12 PM MDT	Flash Flood Warning	CYS	Laramie	117 min
Jul 25, 4:24 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	38 min
Jul 24, 6:08 PM MDT	Special Weather Statement	CYS	Scotts Bluff	52 min
Jul 24, 6:17 PM MDT	Severe Thunderstorm Warning	CYS	Morrill, Scotts Bluff	43 min
Jul 24, 6:51 PM MDT	Special Weather Statement	CYS	Dawes	39 min
Jul 24, 7:35 PM MDT	Special Weather Statement	CYS	Box Butte	40 min
Jul 24, 11:34 PM MDT	Special Weather Statement	CYS	Dawes	41 min
Jul 25, 12:12 AM MDT	Special Weather Statement	CYS	Dawes	48 min
Jul 25, 2:53 AM MDT	Special Weather Statement	CYS	Dawes	52 min
Jul 25, 3:44 AM MDT	Special Weather Statement	CYS	Box Butte	46 min
Jul 25, 4:52 AM MDT	Special Weather Statement	CYS	Dawes	53 min

Nearby

Special Weather Statements in Wyoming, 2018 Every special weather statement in 2018

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.