Alert archive / Nebraska / Special Weather Statements in 2019

Special Weather Statement, NWS Cheyenne, WY

August 4, 2019Dawes County, Nebraska

NWS Cheyenne, WY issued this special weather statement at Aug 4, 2019, 3:01 PM MDT for Dawes County, Nebraska. 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: Aug 4, 2019, 3:01 PM MDT (21:01 UTC)
Expired: Aug 4, 2019, 3:45 PM MDT
In force: 44 min
Issued by: NWS Cheyenne, WY

County Dawes County, NE

The radar

The Rapid City radar (KUDX), 191 km from the middle of the area, began a volume at 21:04 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

Rapid City, SD (KUNR), launched 12:00Z, 9.0 hours before the alert went out and 185 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: 286 J/kg
Mixed-layer CIN: -291 J/kg
Mixed-layer LCL: 2343 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 4 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 Aug 4, 1:57 PM MDT, 1 hour 4 minutes earlier.

Area forecast discussion, Aug 4, 1:57 PM MDT, 1 hour 4 minutes before

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Hazardous weather outlook, Aug 4, 3:39 AM MDT, 11 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
339 AM MDT Sun Aug 4 2019

WYZ103>107-109>118-050945-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
East Platte 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-
339 AM MDT Sun Aug 4 2019

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

.DAY ONE...TODAY AND TONIGHT

General, non-severe thunderstorms possible this afternoon into the
early evening. Small hail and brief gusty winds be main concern.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

General thunderstorm to marginal risk of severe weather possible
over the next couple days with hail, winds, and heavy rainfall
biggest concerns.

.Spotter information statement...

Spotters are encouraged to report their precipitation, wind
damage, and/or hail to the National Weather Service Office in
Cheyenne, Wyoming.

NEZ002-003-019>021-054-055-095-096-WYZ101-102-108-119-050945-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-Converse County Lower Elevations-
Niobrara County-Goshen County-East Laramie County-
339 AM MDT Sun Aug 4 2019

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

.DAY ONE...TODAY AND TONIGHT

Strong to severe thunderstorms possible late afternoon into the
evening. Strong, damaging winds, large hail and locally heavy rain
are the main threats.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

General thunderstorm to marginal risk of severe weather possible
over the next couple days with hail, winds, and heavy rainfall
biggest concerns.

.Spotter information statement...

Spotters are encouraged to report their precipitation, wind
damage, and/or hail to the National Weather Service Office in
Cheyenne, Wyoming.

In the hours before

Special weather statement, Aug 4, 12:40 PM MDT, 2 hours 21 minutes before

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Special weather statement, Aug 4, 2:38 PM MDT, 23 minutes before

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Special weather statement, Aug 4, 2:39 PM MDT, 22 minutes before

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Special weather statement, Aug 4, 3:01 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
301 PM MDT Sun Aug 4 2019

NEZ002-003-042145-
Box Butte NE-Dawes NE-
301 PM MDT Sun Aug 4 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN BOX BUTTE AND
SOUTHEASTERN DAWES COUNTIES UNTIL 345 PM MDT...

At 301 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Box Butte Dam to near Flahertys Corner.
Movement was northeast at 25 mph.

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

Locations impacted include...
Hemingford, Box Butte Campground, Box Butte Dam and Marsland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These storms 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.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Cheyenne.

&&

LAT...LON 4222 10294 4223 10343 4239 10343 4264 10312
      4271 10278 4245 10277 4243 10275
TIME...MOT...LOC 2101Z 246DEG 20KT 4253 10307 4230 10336

Hammer

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 6:22 PM MDT	Special Weather Statement	CYS	Platte	38 min
Aug 3, 6:45 PM MDT	Special Weather Statement	CYS	Laramie	45 min
Aug 3, 8:21 PM MDT	Special Weather Statement	CYS	Niobrara	39 min
Aug 3, 8:28 PM MDT	Special Weather Statement	CYS	Niobrara	62 min
Aug 3, 8:33 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	42 min
Aug 3, 9:28 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	32 min
Aug 4, 12:40 PM MDT	Special Weather Statement	CYS	Laramie	50 min
Aug 4, 2:38 PM MDT	Special Weather Statement	CYS	Box Butte	22 min
Aug 4, 2:39 PM MDT	Special Weather Statement	CYS	Banner	36 min
Aug 4, 3:47 PM MDT	Special Weather Statement	CYS	Dawes	43 min
Aug 4, 3:49 PM MDT	Special Weather Statement	CYS	Box Butte	41 min

Nearby

Special Weather Statements in Nebraska, 2019 Every special weather statement 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.