Severe Thunderstorm Warning 262, NWS Cheyenne, WY

894 
WWUS55 KCYS 172012
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
212 PM MDT FRI AUG 17 2018

WYC001-021-172100-
/O.CON.KCYS.SV.W.0262.000000T0000Z-180817T2100Z/
Albany WY-Laramie WY-
212 PM MDT FRI AUG 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM MDT
FOR SOUTHEASTERN ALBANY AND SOUTHWESTERN LARAMIE COUNTIES...

At 211 PM MDT, a severe thunderstorm was located 4 miles southeast 
of Buford, or 23 miles west of Cheyenne, moving southeast at 10 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of
southeastern Albany and southwestern Laramie Counties.

This includes Interstate 80 in Wyoming between mile markers 337 and
347.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4109 10533 4115 10520 4109 10506 4100 10519
      4100 10528
TIME...MOT...LOC 2011Z 324DEG 8KT 4106 10523 

HAIL...1.00IN
WIND...<50MPH
 
$$

Rubin

579 
WWUS55 KCYS 172025
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
225 PM MDT FRI AUG 17 2018

WYC001-021-172100-
/O.CON.KCYS.SV.W.0262.000000T0000Z-180817T2100Z/
Albany WY-Laramie WY-
225 PM MDT FRI AUG 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM MDT
FOR SOUTHEASTERN ALBANY AND SOUTHWESTERN LARAMIE COUNTIES...

At 224 PM MDT, a severe thunderstorm was located 7 miles southeast 
of Buford, or 22 miles west southwest of Cheyenne, moving southeast 
at 5 mph.

HAZARD...Ping pong ball size hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe thunderstorm will remain over mainly rural areas of
southeastern Albany and southwestern Laramie Counties.

This includes Interstate 80 in Wyoming between mile markers 337 and
347.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4109 10533 4115 10519 4109 10506 4100 10519
      4100 10528
TIME...MOT...LOC 2024Z 308DEG 6KT 4105 10521 

HAIL...1.50IN
WIND...<50MPH
 
$$

Rubin

423 
WWUS55 KCYS 172044
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
244 PM MDT FRI AUG 17 2018

WYC001-172054-
/O.CAN.KCYS.SV.W.0262.000000T0000Z-180817T2100Z/
Albany WY-
244 PM MDT FRI AUG 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ALBANY COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4111 10527 4115 10519 4109 10506 4100 10519
      4100 10527
TIME...MOT...LOC 2044Z 306DEG 8KT 4102 10516 

$$

WYC021-172100-
/O.CON.KCYS.SV.W.0262.000000T0000Z-180817T2100Z/
Laramie WY-
244 PM MDT FRI AUG 17 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM MDT
FOR SOUTHWESTERN LARAMIE COUNTY...

At 244 PM MDT, a severe thunderstorm was located 9 miles south of
Crystal Lake Campground, or 21 miles southwest of Cheyenne, moving
southeast at 10 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of
southwestern Laramie County.

This includes Interstate 80 in Wyoming between mile markers 338 and
347.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4111 10527 4115 10519 4109 10506 4100 10519
      4100 10527
TIME...MOT...LOC 2044Z 306DEG 8KT 4102 10516 

HAIL...1.00IN
WIND...<50MPH
 
$$

Rubin

298 
WWUS55 KCYS 172056
SVSCYS

Severe Weather Statement
National Weather Service Cheyenne WY
256 PM MDT FRI AUG 17 2018

WYC021-172106-
/O.EXP.KCYS.SV.W.0262.000000T0000Z-180817T2100Z/
Laramie WY-
256 PM MDT FRI AUG 17 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LARAMIE COUNTY
WILL EXPIRE AT 300 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 4111 10527 4115 10519 4109 10506 4100 10519
      4100 10527
TIME...MOT...LOC 2056Z 308DEG 6KT 4101 10514 

$$

Rubin

Area Forecast Discussion
National Weather Service Cheyenne WY
111 PM MDT Fri Aug 17 2018

.SHORT TERM...(This evening through Sunday Night)
Issued at 107 PM MDT Fri Aug 17 2018

Tonight...Expecting isolated to widely scattered thunderstorms
through early evening mainly along and east of I-25. With CAPES from
1000 to 2000 J/kg and some weak shear, we may see a few strong to
severe thunderstorms develop before storms dissipate by late evening.

Saturday...Rather potent shortwave trough aloft moves over eastern
Wyoming in the afternoon, and with adequate low and mid level
moisture, we expect scattered showers and thunderstorms to form in
the morning and continue in the afternoon. A few strong to severe
storms possible with expected shear and instability. Cooler
temperatures with more cloud cover and precipitation.

Saturday night...Even in the wake of the cold front, we expect
scattered showers and a few thunderstorms as the atmosphere nears
saturation under cyclonic flow aloft.

Sunday...Autumnal like day in the wake of the cold front with
scattered showers and a few thunderstorms in the moist cyclonic flow
aloft. Maximum temperatures only in the mid 60s to near 70 degrees.
Breezy as well based on low and mid level gradients.

.LONG TERM...(Monday through Friday)
Issued at 107 PM MDT Fri Aug 17 2018

Monday...Slow warming trend under northwest flow aloft and the day
looks dry with limited low and mid level moisture.

Tuesday...Flow aloft remains northwest. With adequate moisture,
expect isolated late day thunderstorms over and near the southern
mountains near the Colorado state line.

Wednesday...Although ridging aloft continues, it looks like enough
low and mid level moisture for at least isolated late day
thunderstorms over and near the mountains near the Colorado state
line.

Thursday...Drier westerly flow aloft develops, producing a day with
near zero chance of thunderstorms. Warmer temperatures expected with
less cloud cover and precipitation coverage.

Friday...Heights slowly decrease and flow turns west southwest as a
fast moving shortwave trough aloft moves eastward across Montana.
Mostly dry day except for a few thunderstorms over the mountains.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 107 PM MDT Fri Aug 17 2018

No changes made from the 12Z TAFs. Still looking like we could see
some afternoon thunderstorms around KCYS and KLAR in southeast
Wyoming as well as our southern Nebraska Panhandle airports. Most
convective activity looks to stay in Colorado today however...so
will only continue VCTS wording.

&&

.FIRE WEATHER...
Issued at 107 PM MDT Fri Aug 17 2018

Minimal concerns as winds and humidities remain below critical
thresholds.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.
&&

SHORT TERM...RUBIN
LONG TERM...RUBIN
AVIATION...GCC
FIRE WEATHER...RUBIN

Hazardous Weather Outlook
National Weather Service Cheyenne WY
643 AM MDT Fri Aug 17 2018

NEZ002-003-019>021-054-055-095-096-WYZ101>113-181245-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-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-
643 AM MDT Fri Aug 17 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

Isolated to scattered showers and thunderstorms are possible this
afternoon.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Isolated to scattered showers and thunderstorms are possible over
the weekend and in the early half of the week.

.Spotter information statement...

Spotter activation will likely not be needed today.

WYZ114>119-181245-
Snowy Range-Laramie Valley-South Laramie Range-
South Laramie Range Foothills-Central Laramie County-
East Laramie County-
643 AM MDT Fri Aug 17 2018

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

.DAY ONE...TODAY AND TONIGHT

Isolated to scattered showers and thunderstorms are possible this
afternoon. A couple storms may be strong to severe.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Isolated to scattered showers and thunderstorms are possible over
the weekend and in the early half of the week.

.Spotter information statement...

Spotter activation may be needed later this afternoon.

Special Weather Statement
National Weather Service Cheyenne WY
147 PM MDT FRI AUG 17 2018

WYZ116-117-172030-
South Laramie Range WY-South Laramie Range Foothills WY-
147 PM MDT FRI AUG 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ALBANY AND
SOUTHWESTERN LARAMIE COUNTIES UNTIL 230 PM MDT...

At 146 PM MDT, Doppler radar was tracking a strong thunderstorm over
Buford, or 21 miles southeast of Laramie, moving south at 15 mph.

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

This storm will remain over mainly rural areas of southeastern Albany
and southwestern Laramie Counties.

This includes Interstate 80 in Wyoming between mile markers 335 and
344.

LAT...LON 4112 10534 4118 10522 4100 10505 4100 10533
TIME...MOT...LOC 1946Z 339DEG 11KT 4110 10527

Rubin