Alert archive / Wyoming / Special Weather Statements in 2018

Special Weather Statement, NWS Cheyenne, WY

August 5, 2018Niobrara County, Wyoming

NWS Cheyenne, WY issued this special weather statement at Aug 5, 2018, 6:35 PM MDT for Niobrara County, Wyoming. It was in force for 40 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: Aug 5, 2018, 6:35 PM MDT (00:35 UTC)
Expired: Aug 5, 2018, 7:15 PM MDT
In force: 40 min
Issued by: NWS Cheyenne, WY

County Niobrara County, WY

The radar

The Rapid City radar (KUDX), 159 km from the middle of the area, began a volume at 00:38 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 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 Aug 5, 6:20 PM MDT, 15 minutes earlier.

Area forecast discussion, Aug 5, 6:20 PM MDT, 15 minutes before

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Hazardous weather outlook, Aug 5, 7:38 AM MDT, 10 hours 57 minutes before

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In the hours before

Special weather statement, Aug 5, 5:59 PM MDT, 36 minutes before

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Special weather statement, Aug 5, 6:01 PM MDT, 34 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
601 PM MDT SUN AUG 5 2018

WYZ101-102-060030-
Converse County Lower Elevations WY-Niobrara County WY-
601 PM MDT SUN AUG 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN NIOBRARA AND
SOUTHEASTERN CONVERSE COUNTIES UNTIL 630 PM MDT...

At 601 PM MDT, Doppler radar was tracking a strong thunderstorm near
Keeline, or 20 miles west of Lusk, moving northeast at 40 mph.

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

Locations impacted include...
Manville, Keeline, Lance Creek and Lost Springs.

LAT...LON 4264 10487 4278 10501 4304 10456 4282 10447
TIME...MOT...LOC 0001Z 233DEG 33KT 4276 10486

Braun

Special weather statement, Aug 5, 6:05 PM MDT, 30 minutes before

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Special weather statement, Aug 5, 6:15 PM MDT, 20 minutes before

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Local storm report, Aug 5, 6:26 PM MDT, 9 minutes before

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Special weather statement, Aug 5, 6:35 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
635 PM MDT SUN AUG 5 2018

WYZ102-060115-
Niobrara County WY-
635 PM MDT SUN AUG 5 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL NIOBRARA COUNTY UNTIL 715
PM MDT...

At 634 PM MDT, Doppler radar was tracking a strong thunderstorm near
Lance Creek, or 15 miles northwest of Lusk, moving northeast at 45
mph.

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

Locations impacted include...
Mule Creek Junction, Redbird and Lance Creek.

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.

&&

LAT...LON 4336 10405 4316 10405 4279 10461 4289 10485
      4348 10424
TIME...MOT...LOC 0034Z 217DEG 40KT 4297 10457

Braun

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 6:01 PM MDT	Special Weather Statement	CYS	Niobrara	29 min
Aug 5, 8:32 PM MDT	Special Weather Statement	CYS	Laramie	43 min
Aug 6, 12:21 AM MDT	Special Weather Statement	CYS	Laramie	24 min
Aug 6, 1:51 PM MDT	Special Weather Statement	CYS	Laramie	39 min
Aug 6, 1:58 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	47 min
Aug 6, 2:17 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	43 min
Aug 6, 2:49 PM MDT	Special Weather Statement	CYS	Laramie	41 min
Aug 6, 3:42 PM MDT	Special Weather Statement	CYS	Laramie	48 min
Aug 6, 3:59 PM MDT	Special Weather Statement	CYS	Converse	46 min
Aug 6, 4:42 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara, Platte	33 min
Aug 6, 5:11 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Platte	16 min
Aug 5, 6:05 PM MDT	Special Weather Statement	CYS	Banner	25 min
Aug 5, 6:15 PM MDT	Special Weather Statement	CYS	Kimball	45 min
Aug 5, 7:09 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Kimball	36 min
Aug 5, 7:33 PM MDT	Special Weather Statement	CYS	Dawes	42 min
Aug 5, 9:54 PM MDT	Special Weather Statement	CYS	Dawes	51 min
Aug 6, 12:41 AM MDT	Special Weather Statement	CYS	Kimball	34 min
Aug 6, 3:26 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Sioux	49 min
Aug 6, 3:40 PM MDT	Special Weather Statement	CYS	Box Butte	50 min
Aug 6, 3:56 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	49 min
Aug 6, 4:33 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	42 min
Aug 6, 5:08 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	26 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; radar from the NEXRAD Level II archive.