Alert archive / Wyoming / High Wind Warnings in 2020

High Wind Warning 16, NWS Riverton, WY

October 13, 20208 counties in Wyoming

NWS Riverton, WY issued this high wind warning at Oct 13, 2020, 1:20 PM MDT for 8 counties in Wyoming. It took effect at Oct 13, 2020, 6:00 PM MDT. It was in force for 25 hr. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Oct 13, 2020, 1:20 PM MDT (19:20 UTC)
In effect from
Oct 13, 2020, 6:00 PM MDT
Expired
Oct 14, 2020, 7:00 PM MDT
In force
25 hr
Issued by
NWS Riverton, WY

Counties Fremont County, WY, Hot Springs County, WY, Johnson County, WY, Lincoln County, WY, Natrona County, WY, Park County, WY, Sublette County, WY, Sweetwater County, WY

The radar

The Riverton/Lander radar (KRIW), 18 km from the middle of the area, began a volume at 19:24 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.

What was reported inside it

TimeReportWhereRemark
Oct 14, 9:34 AM MDTNON-TSTM WND GST 592 N Marbleton, WYASOS STATION KBPI BIG PINEY AIRPORT.
Oct 14, 1:12 PM MDTNON-TSTM WND GST 595 Nw Riverton, WYASOS STATION KRIW RIVERTON AIRPORT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 7.3 hours before the alert went out and 24 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-pSkew-T log-p diagram, Riverton, WY at 12:00Z on 2020-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2020-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2305 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

770 
WWUS75 KRIW 131920
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
120 PM MDT Tue Oct 13 2020

WYZ002-003-014-015-141200-
/O.UPG.KRIW.HW.A.0009.201014T0000Z-201014T1500Z/
/O.NEW.KRIW.HW.W.0016.201014T0000Z-201014T1500Z/
Absaroka Mountains-Cody Foothills-Wind River Mountains West-
Wind River Mountains East-
Including the cities of Clark, Cody, and Meeteetse
120 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 AM MDT
WEDNESDAY...

* WHAT...West winds 40 to 50 mph with gusts up to 75 mph expected
  in the mountains, and 30 to 40 mph with gusts up to 65 mph in
  the Cody Foothills expected.

* WHERE...Absaroka Mountains, Cody Foothills, Wind River 
  Mountains West, and Wind River Mountains East.

* WHEN...From 6 PM this evening to 9 AM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...The strongest winds are likely from about 9
  PM Tuesday through 6 AM Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ010-141200-
/O.UPG.KRIW.HW.A.0009.201014T1200Z-201015T0100Z/
/O.NEW.KRIW.HW.W.0016.201014T1200Z-201015T0100Z/
Northeast Johnson County-
Including the city of Buffalo
120 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING IN EFFECT FROM 6 AM TO 7 PM MDT WEDNESDAY...

* WHAT...Northwest winds 35 to 45 mph with gusts up to 65 mph 
  expected.

* WHERE...Northeast Johnson County.

* WHEN...From 6 AM to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Widespread power outages are possible. Travel will be difficult,
  especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ018-141200-
/O.UPG.KRIW.HW.A.0009.201014T0000Z-201014T1500Z/
/O.NEW.KRIW.HW.W.0016.201014T0000Z-201014T1500Z/
Lander Foothills-
Including the city of Lander
120 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 AM MDT
WEDNESDAY...

* WHAT...West winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Lander Foothills.

* WHEN...From 6 PM this evening to 9 AM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...Strong northwest winds are also possible
  from 9 AM to 6 PM Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ019-020-027>030-141200-
/O.UPG.KRIW.HW.A.0009.201014T1500Z-201015T0100Z/
/O.NEW.KRIW.HW.W.0016.201014T1500Z-201015T0100Z/
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Jeffrey City, Casper, Kemmerer, 
Cokeville, Rock Springs, Green River, and Wamsutter
120 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING IN EFFECT FROM 9 AM TO 7 PM MDT WEDNESDAY...

* WHAT...West winds 25 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Green Mountains and Rattlesnake Range, Natrona County 
  Lower Elevations, South Lincoln County, Rock Springs and Green 
  River, Flaming Gorge, and East Sweetwater County.

* WHEN...From 9 AM to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ016-141200-
/O.UPG.KRIW.HW.A.0009.201014T0000Z-201015T0100Z/
/O.NEW.KRIW.HW.W.0016.201014T0000Z-201015T0100Z/
Upper Wind River Basin-
Including the city of Dubois
120 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING IN EFFECT FROM 6 PM THIS EVENING TO 7 PM MDT
WEDNESDAY...

* WHAT...West winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Upper Wind River Basin.

* WHEN...From 6 PM this evening to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ017-141200-
/O.NEW.KRIW.HW.W.0016.201014T1500Z-201015T0100Z/
Wind River Basin-
Including the cities of Riverton and Shoshoni
120 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING IN EFFECT FROM 9 AM TO 7 PM MDT WEDNESDAY...

* WHAT...Northwest winds 25 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Wind River Basin.

* WHEN...From 9 AM to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines.
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/riw
6 follow-up statements
480 
WWUS75 KRIW 140256
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
856 PM MDT Tue Oct 13 2020

WYZ002-003-014-015-141200-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201014T1500Z/
Absaroka Mountains-Cody Foothills-Wind River Mountains West-
Wind River Mountains East-
Including the cities of Clark, Cody, and Meeteetse
856 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT WEDNESDAY...

* WHAT...West winds 40 to 50 mph with gusts up to 75 mph 
  expected in the mountains, and 30 to 40 mph with gusts up to 
  65 mph in the Cody Foothills expected.

* WHERE...Absaroka Mountains, Cody Foothills, Wind River 
  Mountains West, and Wind River Mountains East.

* WHEN...Until 9 AM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...The strongest winds are likely from about 
  9 PM Tuesday through 6 AM Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ010-141200-
/O.CON.KRIW.HW.W.0016.201014T1200Z-201015T0100Z/
Northeast Johnson County-
Including the city of Buffalo
856 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING REMAINS IN EFFECT FROM 6 AM TO 7 PM MDT
WEDNESDAY...

* WHAT...Northwest winds 35 to 45 mph with gusts up to 65 mph 
  expected.

* WHERE...Northeast Johnson County.

* WHEN...From 6 AM to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ018-141200-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201014T1500Z/
Lander Foothills-
Including the city of Lander
856 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT WEDNESDAY...

* WHAT...West winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Lander Foothills.

* WHEN...Until 9 AM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...Strong northwest winds are also possible 
  from 9 AM to 6 PM Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ017-019-020-027>030-141200-
/O.CON.KRIW.HW.W.0016.201014T1500Z-201015T0100Z/
Wind River Basin-Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Riverton, Shoshoni, Jeffrey City, Casper,
Kemmerer, Cokeville, Rock Springs, Green River, and Wamsutter
856 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING REMAINS IN EFFECT FROM 9 AM TO 7 PM MDT
WEDNESDAY...

* WHAT...West winds 25 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Green Mountains and Rattlesnake Range, Natrona County 
  Lower Elevations, South Lincoln County, Rock Springs and Green 
  River, Flaming Gorge, and East Sweetwater County.

* WHEN...From 9 AM to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ016-141200-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Upper Wind River Basin-
Including the city of Dubois
856 PM MDT Tue Oct 13 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT WEDNESDAY...

* WHAT...West winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Upper Wind River Basin.

* WHEN...Until 7 PM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/riw
134 
WWUS75 KRIW 140809
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
209 AM MDT Wed Oct 14 2020

WYZ025-026-141615-
/O.EXA.KRIW.HW.W.0016.201014T1500Z-201015T0100Z/
Upper Green River Basin Foothills-Upper Green River Basin-
Including the cities of Pinedale, La Barge, Big Piney, and Farson
209 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING IN EFFECT FROM 9 AM THIS MORNING TO 7 PM MDT
THIS EVENING...

* WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Upper Green River Basin Foothills and Upper Green 
  River Basin.

* WHEN...From 9 AM to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are possible. Travel will be 
  difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ002-003-014-015-141500-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201014T1500Z/
Absaroka Mountains-Cody Foothills-Wind River Mountains West-
Wind River Mountains East-
Including the cities of Clark, Cody, and Meeteetse
209 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS
MORNING...

* WHAT...West winds 40 to 50 mph with gusts up to 75 mph 
  expected in the mountains, and 30 to 40 mph with gusts up to 
  65 mph in the Cody Foothills expected.

* WHERE...Absaroka Mountains, Cody Foothills, Wind River 
  Mountains West, and Wind River Mountains East.

* WHEN...Until 9 AM MDT Wednesday.

* IMPACTS...Damaging winds may blow down trees and power lines. Travel
  will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ010-141615-
/O.CON.KRIW.HW.W.0016.201014T1200Z-201015T0100Z/
Northeast Johnson County-
Including the city of Buffalo
209 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT FROM 6 AM THIS MORNING TO
7 PM MDT THIS EVENING...

* WHAT...Northwest winds 35 to 45 mph with gusts up to 65 mph 
  expected.

* WHERE...Northeast Johnson County.

* WHEN...From 6 AM to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds may blow down trees and power lines.
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ017-019-020-027>030-141615-
/O.CON.KRIW.HW.W.0016.201014T1500Z-201015T0100Z/
Wind River Basin-Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Riverton, Shoshoni, Jeffrey City, Casper,
Kemmerer, Cokeville, Rock Springs, Green River, and Wamsutter
209 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT FROM 9 AM THIS MORNING TO
7 PM MDT THIS EVENING...

* WHAT...West winds 25 to 40 mph with gusts up to 65 mph 
  expected.

* WHERE...Green Mountains and Rattlesnake Range, Natrona County 
  Lower Elevations, South Lincoln County, Rock Springs and Green 
  River, Flaming Gorge, and East Sweetwater County.

* WHEN...From 9 AM to 7 PM MDT Wednesday.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ018-141500-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201014T1500Z/
Lander Foothills-
Including the city of Lander
209 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS
MORNING...

* WHAT...West winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Lander Foothills.

* WHEN...Until 9 AM MDT Wednesday.

* IMPACTS...Damaging winds may blow down trees and power lines. Travel
  will be difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...Strong northwest winds are also possible 
  from 9 AM to 6 PM Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ016-141615-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Upper Wind River Basin-
Including the city of Dubois
209 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...West winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Upper Wind River Basin.

* WHEN...Until 7 PM MDT Wednesday.

* IMPACTS...Damaging winds may blow down trees and power lines.
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/riw
018 
WWUS75 KRIW 141205
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
605 AM MDT Wed Oct 14 2020

WYZ002-003-014-015-141500-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201014T1500Z/
Absaroka Mountains-Cody Foothills-Wind River Mountains West-
Wind River Mountains East-
Including the cities of Clark, Cody, and Meeteetse
605 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS
MORNING...

* WHAT...West winds 40 to 50 mph with gusts up to 75 mph 
  expected in the mountains, and 30 to 40 mph with gusts up to 
  65 mph in the Cody Foothills expected.

* WHERE...Absaroka Mountains, Cody Foothills, Wind River 
  Mountains West, and Wind River Mountains East.

* WHEN...Until 9 AM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ010-150100-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Northeast Johnson County-
Including the city of Buffalo
605 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...Northwest winds 35 to 45 mph with gusts up to 65 mph 
  expected.

* WHERE...Northeast Johnson County.

* WHEN...Until 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ017-019-020-025>030-150100-
/O.CON.KRIW.HW.W.0016.201014T1500Z-201015T0100Z/
Wind River Basin-Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Riverton, Shoshoni, Jeffrey City, Casper,
Pinedale, La Barge, Big Piney, Farson, Kemmerer, Cokeville, 
Rock Springs, Green River, and Wamsutter
605 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...West winds 25 to 40 mph with gusts up to 65 mph 
  expected.

* WHERE...Green Mountains and Rattlesnake Range, Natrona County 
  Lower Elevations, South Lincoln County, Rock Springs and Green 
  River, Flaming Gorge, and East Sweetwater County.

* WHEN...From 9 AM to 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ018-141500-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201014T1500Z/
Lander Foothills-
Including the city of Lander
605 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS
MORNING...

* WHAT...West winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Lander Foothills.

* WHEN...Until 9 AM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.

* ADDITIONAL DETAILS...Strong northwest winds are also possible
  from 9 AM to 6 PM today.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ016-150100-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Upper Wind River Basin-
Including the city of Dubois
605 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...West winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Upper Wind River Basin.

* WHEN...Until 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/riw
457 
WWUS75 KRIW 141508
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
908 AM MDT Wed Oct 14 2020

WYZ002-150100-
/O.EXP.KRIW.HW.W.0016.000000T0000Z-201014T1500Z/
/O.NEW.KRIW.HW.W.0017.201014T1508Z-201015T0100Z/
Absaroka Mountains-
908 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING IN EFFECT UNTIL 7 PM MDT THIS EVENING...

* WHAT...West winds 35 to 50 mph with gusts up to 75 mph.

* WHERE...Absaroka Mountains.

* WHEN...Until 7 PM MDT this evening.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ003-014-015-018-141615-
/O.EXP.KRIW.HW.W.0016.000000T0000Z-201014T1500Z/
Cody Foothills-Wind River Mountains West-
Wind River Mountains East-Lander Foothills-
Including the cities of Clark, Cody, Meeteetse, and Lander
908 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING HAS EXPIRED...

Strong winds have subsided this morning, but could still remain
high during the day in some areas, especially South Pass.

$$

WYZ010-150100-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Northeast Johnson County-
Including the city of Buffalo
908 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...Northwest winds 35 to 45 mph with gusts up to 65 mph 
  expected.

* WHERE...Northeast Johnson County.

* WHEN...Until 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ017-019-020-025>030-150100-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Wind River Basin-Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Riverton, Shoshoni, Jeffrey City, Casper,
Pinedale, La Barge, Big Piney, Farson, Kemmerer, Cokeville, 
Rock Springs, Green River, and Wamsutter
908 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...West winds 25 to 40 mph with gusts 55 to 65 mph 
  expected, particularly at the higher elevations.

* WHERE...Green Mountains and Rattlesnake Range, Natrona County 
  Lower Elevations, South Lincoln County, Rock Springs and Green 
  River, Flaming Gorge, and East Sweetwater County.

* WHEN...From 9 AM to 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ016-150100-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Upper Wind River Basin-
Including the city of Dubois
908 AM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...West winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Upper Wind River Basin.

* WHEN...Until 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/riw
873 
WWUS75 KRIW 141856
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1256 PM MDT Wed Oct 14 2020

WYZ020-142000-
/O.CAN.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Natrona County Lower Elevations-
Including the city of Casper
1256 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING IS CANCELLED...

Winds across Natrona County are not as strong as anticipated
today. Thus, the warning has been cancelled. Wind gusts up to 45
mph from the northwest can still be expected in many locations
through the rest of the afternoon.

$$

WYZ010-150100-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Northeast Johnson County-
Including the city of Buffalo
1256 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...Northwest winds 35 to 45 mph with gusts up to 65 mph 
  expected.

* WHERE...Northeast Johnson County.

* WHEN...Until 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ017-019-025>030-150100-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Wind River Basin-Green Mountains and Rattlesnake Range-
Upper Green River Basin Foothills-Upper Green River Basin-
South Lincoln County-Rock Springs and Green River-Flaming Gorge-
East Sweetwater County-
Including the cities of Riverton, Shoshoni, Jeffrey City, 
Pinedale, La Barge, Big Piney, Farson, Kemmerer, Cokeville, 
Rock Springs, Green River, and Wamsutter
1256 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...West winds 25 to 40 mph with gusts 55 to 65 mph 
  expected, particularly at the higher elevations.

* WHERE...Green Mountains and Rattlesnake Range, Natrona County 
  Lower Elevations, South Lincoln County, Rock Springs and Green 
  River, Flaming Gorge, and East Sweetwater County.

* WHEN...From 9 AM to 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines.
  Travel will be difficult, especially for high profile vehicles.
  Visibility may be reduced as well by blowing dust.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ016-150100-
/O.CON.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Upper Wind River Basin-
Including the city of Dubois
1256 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...West winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Upper Wind River Basin.

* WHEN...Until 7 PM MDT today.

* IMPACTS...Damaging winds may blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

WYZ002-150100-
/O.CON.KRIW.HW.W.0017.000000T0000Z-201015T0100Z/
Absaroka Mountains-
1256 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS
EVENING...

* WHAT...West winds 35 to 50 mph with gusts up to 75 mph.

* WHERE...Absaroka Mountains.

* WHEN...Until 7 PM MDT this evening.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Travel will be difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/riw
091 
WWUS75 KRIW 150039
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
639 PM MDT Wed Oct 14 2020

WYZ010-150145-
/O.EXP.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Northeast Johnson County-
Including the city of Buffalo
639 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING...

Winds have decreased below high wind warning criteria, thus the
high wind warning will be allowed to expire at 7 PM.

$$

WYZ017-019-025>030-150145-
/O.EXP.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Wind River Basin-Green Mountains and Rattlesnake Range-
Upper Green River Basin Foothills-Upper Green River Basin-
South Lincoln County-Rock Springs and Green River-Flaming Gorge-
East Sweetwater County-
Including the cities of Riverton, Shoshoni, Jeffrey City, 
Pinedale, La Barge, Big Piney, Farson, Kemmerer, Cokeville, 
Rock Springs, Green River, and Wamsutter
639 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING...

Winds have decreased below high wind warning criteria, thus the
high wind warning will be allowed to expire at 7 PM.

$$

WYZ016-150145-
/O.EXP.KRIW.HW.W.0016.000000T0000Z-201015T0100Z/
Upper Wind River Basin-
Including the city of Dubois
639 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING...

Winds have decreased below high wind warning criteria, thus the
high wind warning will be allowed to expire at 7 PM.

$$

WYZ002-150145-
/O.EXP.KRIW.HW.W.0017.000000T0000Z-201015T0100Z/
Absaroka Mountains-
639 PM MDT Wed Oct 14 2020

...HIGH WIND WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING...

Winds have decreased below high wind warning criteria, thus the
high wind warning will be allowed to expire at 7 PM.

$$

For more information from the National Weather Service visit
https://weather.gov/riw

What forecasters said that day

The local office's own words before this high wind warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Riverton, WY wrote its last area forecast discussion before this high wind warning went out at Oct 13, 11:15 AM MDT, 2 hours 5 minutes earlier.

Area forecast discussion, Oct 13, 11:15 AM MDT, 2 hours 5 minutes before
Area Forecast Discussion
National Weather Service Riverton WY
1115 AM MDT Tue Oct 13 2020

.SHORT TERM...Today through Wednesday

A cold front will begin to sag toward the area today. Northwest
Wyoming should be the area strongest hit. With snow levels at 9000
feet most areas will see rain, with just a skiff of snow near the
peaks for today. Winds will also become gusty this afternoon, but
thankfully not quite as strong as the last few days.

Things change tonight as the jet pushes the cold front south into
the area. The front right quad of a 140+ knot jet max will enter
northern Wyoming with the front this evening. Boundary layer winds
in the Absarokas and Winds are showing 60-75 knots across several
models starting around 00Z through 15Z Wednesday. Ahead of the
front, winds will be at a favorable direction for downslope gusts
into the Cody and Lander Foothills. This has led us to issue a
High Wind Watch for these areas starting this evening and going
through mid morning Wednesday. The Upper Wind River Basin has also
been included in this watch but wind look to remain strong in
this area through Wednesday evening.

As the front continues to move through the area Wednesday, winds
will begin to mix to the surface from north to south. Northern
Johnson County will be first to shift to its favorite northwest
flow, so the High Wind Watch for this area will start near sunrise
Wednesday. By mid morning Wednesday the Wind Corridor from Lincoln
to Natrona Counties will join the watch. High winds will be possible
for these areas through Wednesday evening. Currently, Models do
not reflect winds mixing strong enough to include the rest of the
Wind River Basin or Northern Bighorn Basin. These areas will need
to be looked at again with the next model run.

On top of all the winds, Wednesday will still see some showers in
the northwest as the front pushes through. Most of the activity will
be in the mountains, and any snow accumulation will be Wednesday
morning above 9000 ft.

.LONG TERM...Wednesday night to Monday

Strong northwesterly flow is projected for Thursday, as the jet
will remain over the region. The core of the jet will remain strong
(140+ kt) as well. This will translate to another likely day of
high to strong winds across the forecast area. However, these
winds are not reflected at 700mb and only show 20 to 35 kt. For
now, have left surface winds at ~25 kt. The ridge will nudge
eastward over the West Coast Friday, which will shift the jet over
eastern MT and the Plains. High winds will likely continue over
northern Johnson County as a result and gusty winds continuing
elsewhere.

Precipitation looks to be confined to northern and eastern
portions of WY Thursday. The temperatures at 700mb look to be
cold enough for any precipitation to be in the form of snow,
however accumulations in the lower elevations will be little to
none. A few inches will be possible on the northern end of the
Bighorns Wednesday night into Thursday morning.

Another cold front is projected to move in from the north on
Saturday with more precipitation possible. Models differ on how
far south the cold front and the associated cold air will get.
The ECMWF is showing the most benign option with the least amount
of gradient and the highest heights and the Canadian being the
most robust in the cold air push. The GFS shows 700mb temperatures
falling throughout Saturday, with -12C degrees for the
northeastern portions and -8C degrees around Riverton, by Saturday
night. The forecast continue to be highly variable for this period
and will come into better forecast in the next day or two. The
source for this airmass is coming down from northern Canada, which
is contributing to this variability.

Temperatures for the period look to start off within a few
degrees of climatology on Wednesday. A bit cooler conditions are
expected for Thursday. The end of the work week should see a bit
of a rebound before temperatures turn significantly cooler by
Sunday and Monday. MOS guidance on the GFS shows a high on Sunday
of 45 at RIW and 35 for Monday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 1114 AM MDT Tue Oct 13 2020

VFR visibilities will exist across all TAF sites through the period.
Winds will be the main issue at all sites as sustained winds will be
above 20 knots and wind gusts could gust up to and over 40 knots
through the TAF period. Ahead of a cold front, VCSH exist at KJAC
from 18Z today through 12Z tomorrow and KCOD from 06Z through 12Z
tomorrow which could lead to some MVFR visibilities until showers
dissipate.

&&

.FIRE WEATHER...

Another cold front will move toward the area today and bring a
chance of showers to northern Wyoming, most numerous in the
afternoon and again Wednesday. Mainly dry conditions will continue
in southern Wyoming. Winds will again be gusty for most areas, but
not as strong as previous days. Critical fire weather is not
expected at this time, but locally elevated fire weather will be
possible in the afternoon in southern Wyoming. Winds will decrease
overnight in the lower elevations, however winds in the mountains
will continue to see strong to possibly high gusts. A High Wind
Watch has been issued for the Absaroka, Wind River Mountains, Cody
and Lander Foothills.

Winds will continue to be an issue Wednesday as the cold front moves
through the area. While winds will slow a bit in the mountains and
foothills Wednesday morning, expect an increase in northern Johnson
County, Upper Wind River Basin, and for the Wind Corridor from
Lincoln to Natrona County through Wednesday evening. A High Wind
Watch has also been issued for these areas.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
High Wind Watch from Wednesday morning through Wednesday evening
for WYZ019-020-027>030.

High Wind Watch from 6 PM MDT this evening through Wednesday
morning for WYZ002-003-014-015-018.

High Wind Watch from Wednesday morning through Wednesday evening
for WYZ010.

High Wind Watch from 6 PM MDT this evening through Wednesday
evening for WYZ016.

&&

SHORT TERM...Hulme
LONG TERM...LaVoie/Clayton
AVIATION...Vorst
FIRE WEATHER...Hulme
Hazardous weather outlook, Oct 13, 5:11 AM MDT, 8 hours 9 minutes before
Hazardous Weather Outlook
National Weather Service Riverton WY
511 AM MDT Tue Oct 13 2020

WYZ001>020-022>030-141115-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
511 AM MDT Tue Oct 13 2020

...High Wind Watch in effect for much of the area tonight into
Wednesday...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

A slight chance for rain showers across the north. Breezy to
windy conditions return this afternoon, but not as strong as
previous days.

Winds will increase significantly tonight in the Absaroka and
Wind River Mountains, as well as in the Upper Wind River Basin.
Strong to high downslope winds are also possible in the Cody and
Lander Foothills.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...High to strong winds will continue across the area.

Wednesday night...A slight chance of rain showers over the north,
with a chance of snow in the northern mountains.

Saturday...A chance for rain showers and mountain snow across all
but southern portions.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 13, 3:54 AM MDTHigh Wind WatchRIWFremont, Hot Springs, Johnson, Lincoln, Natrona, Park and 2 more9 hr

Nearby

High Wind Warnings in Wyoming, 2020Every high wind warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.