Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 163, NWS Cheyenne, WY

July 24, 2018Morrill County, Scotts Bluff County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 24, 2018, 6:17 PM MDT for Morrill County, Scotts Bluff County, Nebraska. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 24, 2018, 6:17 PM MDT (00:17 UTC)
Expired: Jul 24, 2018, 7:00 PM MDT
In force: 43 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Morrill County, NE, Scotts Bluff County, NE

The radar

The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 00:19 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, 0.3 hours before the alert went out and 213 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: 765 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 2504 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 24, 6:00 PM MDT, 17 minutes earlier.

Area forecast discussion, Jul 24, 6:00 PM MDT, 17 minutes before

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Hazardous weather outlook, Jul 24, 4:09 AM MDT, 14 hours 8 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
409 AM MDT Tue Jul 24 2018

NEZ020-054-055-WYZ117>119-251030-
Banner-Kimball-Cheyenne-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
409 AM MDT Tue Jul 24 2018

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

.DAY ONE...TODAY AND TONIGHT

Isolated thunderstorms are possible this afternoon into early this
evening. Any storms could produce some small hail and gusty winds.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Chances for showers and thunderstorms will exist Wednesday
through Sunday.

.Spotter information statement...

Spotter activation will not be needed.

NEZ019-021-WYZ101-103>116-251030-
Scotts Bluff-Morrill-Converse County Lower Elevations-
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-
409 AM MDT Tue Jul 24 2018

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

.DAY ONE...TODAY AND TONIGHT

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Chances for showers and thunderstorms will exist Wednesday
through Sunday.

.Spotter information statement...

Spotter activation will not be needed.

NEZ002-003-095-096-WYZ102-251030-
Dawes-Box Butte-North Sioux-South Sioux-Niobrara County-
409 AM MDT Tue Jul 24 2018

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

.DAY ONE...TODAY AND TONIGHT

Scattered showers and thunderstorms are expected mainly tonight.
A few stronger storms are possible with gusty winds and hail the
main threat.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Chances for showers and thunderstorms will exist Wednesday
through Sunday.

.Spotter information statement...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jul 24, 4:52 PM MDT, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
452 PM MDT TUE JUL 24 2018

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

0336 PM     HAIL             20 WSW WARREN AF BASE   41.04N 105.22W
07/24/2018  M1.25 INCH       LARAMIE            WY   COCORAHS

            LATE REPORT FROM COCORAHS.

&&

TTRUDEL

Special weather statement, Jul 24, 5:19 PM MDT, 58 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
519 PM MDT TUE JUL 24 2018

WYZ118-119-250000-
Central Laramie County WY-East Laramie County WY-
519 PM MDT TUE JUL 24 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LARAMIE COUNTY UNTIL
600 PM MDT...

At 519 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Ranchettes, or 9 miles northeast of Cheyenne, moving
southeast at 20 mph.

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

Locations impacted include...
Burns, Hillsdale, Carpenter and Ranchettes.

This includes Interstate 80 in Wyoming between mile markers 369 and
394.

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.

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 4117 10474 4134 10464 4124 10413 4100 10429
      4100 10435
TIME...MOT...LOC 2319Z 297DEG 17KT 4121 10463

Trudel

Local storm report, Jul 24, 5:34 PM MDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
534 PM MDT TUE JUL 24 2018

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

0530 PM     HAIL             5 N LUSK                42.83N 104.45W
07/24/2018  E1.75 INCH       NIOBRARA           WY   LAW ENFORCEMENT

&&

BCHAPMAN

Local storm report, Jul 24, 5:44 PM MDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
544 PM MDT TUE JUL 24 2018

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

0542 PM     HAIL             4 W HILLSDALE           41.21N 104.55W
07/24/2018  E0.50 INCH       LARAMIE            WY   TRAINED SPOTTER

&&

BCHAPMAN

Local storm report, Jul 24, 5:55 PM MDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
555 PM MDT TUE JUL 24 2018

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

0541 PM     HAIL             3 S HILLSDALE           41.17N 104.48W
07/24/2018  M1.25 INCH       LARAMIE            WY   STORM CHASER

            REPORTED BY STORM CHASER ALONG INTERSTATE 80 EAST OF
            CHEYENNE

&&

TTRUDEL

Special weather statement, Jul 24, 6:08 PM MDT, 9 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
608 PM MDT TUE JUL 24 2018

NEZ019-020-250100-
Scotts Bluff NE-Banner NE-
608 PM MDT TUE JUL 24 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SCOTTS BLUFF AND
NORTHWESTERN BANNER COUNTIES UNTIL 700 PM MDT...

At 607 PM MDT, Doppler radar was tracking a strong thunderstorm near
Hubbard Hill, or 11 miles southwest of Scottsbluff, moving east at 30
mph.

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

Locations impacted include...
Scottsbluff, Gering, Terrytown, Minatare, Wildcat Hills State
Recreation Area, Hubbard Hill, Scottsbluff Airport, Wildcat Hills
Campground, Scotts Bluff National Monument and Melbeta.

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.

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 4164 10404 4186 10403 4191 10344 4168 10345
TIME...MOT...LOC 0007Z 262DEG 24KT 4179 10387

Claycomb

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, 2:01 PM MDT	Special Weather Statement	CYS	Albany	44 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, 6:51 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

Severe Thunderstorm Warnings in Nebraska, 2018 Every severe thunderstorm warning 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.