Alert archive / Wyoming / Special Weather Statements in 2017

Special Weather Statement, NWS Cheyenne, WY

July 3, 2017Albany County, Wyoming

NWS Cheyenne, WY issued this special weather statement at Jul 3, 2017, 7:45 PM MDT for Albany County, Wyoming. It was in force for 45 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 3, 2017, 7:45 PM MDT (01:45 UTC)
Expired: Jul 3, 2017, 8:30 PM MDT
In force: 45 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 01:46 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

Denver, CO (KDEN), launched 00:00Z, 1.8 hours before the alert went out and 278 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: 37 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 3327 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 196 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 3, 5:40 PM MDT, 2 hours 5 minutes earlier.

Area forecast discussion, Jul 3, 5:40 PM MDT, 2 hours 5 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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>
      <p class="small" id="detail">
        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 3, 4:09 AM MDT, 15 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
409 AM MDT Mon Jul 3 2017

WYZ101>119-041015-
Converse County Lower Elevations-Niobrara County-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-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-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
409 AM MDT Mon Jul 3 2017

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

.DAY ONE...TODAY AND TONIGHT

Widely scattered thunderstorms are expected once again this
afternoon. A few storms may become strong but widespread severe
weather is not expected.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Isolated to widely scattered showers and thunderstorms are
possible especially Friday through Sunday. At this time widespread
severe weather is not expected.

.Spotter information statement...

Spotter activation will not be needed at this time.

NEZ002-003-019>021-054-055-095-096-041015-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-
409 AM MDT Mon Jul 3 2017

This hazardous weather outlook is for portions of western
Nebraska.

.DAY ONE...TODAY AND TONIGHT

Widely scattered thunderstorms are expected once again this
afternoon. A few storms may become strong but widespread severe
weather is not expected.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Isolated to widely scattered showers and thunderstorms are
possible especially Friday through Sunday. At this time widespread
severe weather is not expected.

.Spotter information statement...

Spotter activation will not be needed at this time.

In the hours before

Special weather statement, Jul 3, 4:14 PM MDT, 3 hours 31 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
414 PM MDT MON JUL 3 2017

NEZ055-032300-
Cheyenne NE-
414 PM MDT MON JUL 3 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHEYENNE COUNTY
UNTIL 500 PM MDT...

At 413 PM MDT, Doppler radar was tracking a strong thunderstorm near
Twin Buttes, or 11 miles southeast of Sidney, moving east at 15 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

This storm will remain over mainly rural areas of southeastern
Cheyenne County.

LAT...LON 4104 10262 4100 10263 4101 10290 4104 10290
      4106 10261
TIME...MOT...LOC 2213Z 277DEG 13KT 4100 10282

Rubin

Special weather statement, Jul 3, 4:43 PM MDT, 3 hours 2 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
443 PM MDT MON JUL 3 2017

NEZ055-032330-
Cheyenne NE-
443 PM MDT MON JUL 3 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHEYENNE COUNTY
UNTIL 530 PM MDT...

At 442 PM MDT, Doppler radar was tracking a strong thunderstorm over
Colton, or 8 miles east of Sidney, moving east at 45 mph.

Another strong thunderstorm was just southeast of Sunol, moving
northeast at 45 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

This strong thunderstorm will be near...
  Sunol around 445 PM MDT.
  Lodgepole around 455 PM MDT.

This includes Interstate 80 in Nebraska between mile markers 62 and
77.

LAT...LON 4100 10262 4101 10284 4115 10296 4122 10294
      4122 10261
TIME...MOT...LOC 2242Z 287DEG 40KT 4115 10282

Rubin

Special weather statement, Jul 3, 4:51 PM MDT, 2 hours 54 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
451 PM MDT MON JUL 3 2017

NEZ021-032330-
Morrill NE-
451 PM MDT MON JUL 3 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MORRILL COUNTY UNTIL
530 PM MDT...

At 451 PM MDT, Doppler radar was tracking a strong thunderstorm near
Richardson Lake, or 27 miles south of Alliance. This storm was nearly
stationary.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

This storm will remain over mainly rural areas of northeastern
Morrill County.

LAT...LON 4162 10287 4191 10288 4192 10268 4179 10268
      4174 10266 4174 10264 4162 10263
TIME...MOT...LOC 2251Z 015DEG 4KT 4172 10270

Rubin

Special weather statement, Jul 3, 4:52 PM MDT, 2 hours 53 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
452 PM MDT MON JUL 3 2017

NEZ055-032345-
Cheyenne NE-
452 PM MDT MON JUL 3 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL CHEYENNE COUNTY
UNTIL 545 PM MDT...

At 452 PM MDT, Doppler radar was tracking a strong thunderstorm over
Gurley, or 15 miles north of Sidney, moving east at 10 mph.

Dime size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Gurley.

LAT...LON 4131 10306 4140 10300 4137 10290 4124 10291
TIME...MOT...LOC 2252Z 285DEG 8KT 4136 10297

Cox

Local storm report, Jul 3, 5:00 PM MDT, 2 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
500 PM MDT MON JUL 03 2017

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

0454 PM     HAIL             8 NE SIDNEY             41.22N 102.86W
07/03/2017  E1.00 INCH       CHEYENNE           NE   TRAINED SPOTTER

&&

KC

Nearby

Special Weather Statements in Wyoming, 2017 Every special weather statement in 2017

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.