Alert archive / Wyoming / High Wind Warnings in 2018

High Wind Warning 16, NWS Riverton, WY

November 2, 2018Johnson County, Wyoming

NWS Riverton, WY issued this high wind warning at Nov 2, 2018, 11:46 AM MDT for Johnson County, Wyoming. It took effect at Nov 3, 2018, 12:00 AM MDT. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Nov 2, 2018, 11:46 AM MDT (17:46 UTC)
In effect from
Nov 3, 2018, 12:00 AM MDT
Expired
Nov 3, 2018, 10:03 AM MDT
In force
10 hr
Issued by
NWS Riverton, WY

County Johnson County, WY

The radar

The Riverton/Lander radar (KRIW), 187 km from the middle of the area, began a volume at 17:50 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

Riverton, WY (KRIW), launched 12:00Z, 5.8 hours before the alert went out and 182 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 2018-11-02Temperature 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 2018-11-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 245 square meters per square second.1939587897117136Sfc1 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
1633 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
245 m²/s²
0-3 km storm-relative helicity
336 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

181 
WWUS75 KRIW 021746
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1146 AM MDT Fri Nov 2 2018

...Very Strong Winds in Parts of North, Central, and South-
central Wyoming This Morning Into the Evening...
...Very Strong Winds in Northern Johnson County late Tonight 
through Saturday Morning...

.An approaching weather system will bring with strong to very
strong winds to a large part of the area Today. Some areas in
from the Cody Foothills south to Sweetwater County could see very
strong winds this morning into the evening.

WYZ010-030200-
/O.UPG.KRIW.HW.A.0015.181103T0600Z-181103T2100Z/
/O.NEW.KRIW.HW.W.0016.181103T0600Z-181103T1800Z/
Northeast Johnson County-
Including the city of Buffalo
1146 AM MDT Fri Nov 2 2018

...HIGH WIND WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO NOON MDT
SATURDAY...

The National Weather Service in Riverton has issued a High Wind
Warning, which is in effect from midnight tonight to noon MDT
Saturday. The High Wind Watch is no longer in effect. 

* TIMING...Midnight tonight through Noon Saturday

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 25 and Interstate 
  90. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ016-030200-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Upper Wind River Basin-
Including the city of Dubois
1146 AM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight.

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph expected.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways including 20 26 between Crowheart and 
  Dubois. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ002-030200-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Absaroka Mountains-
Including the city of Pahaska
1146 AM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight. The strongest winds will
  likely be in the 2 pm to 5 pm timeframe. 

* WINDS...West 45 to 55 mph with gusts to 75 mph expected. Even
  stronger winds are possible between 2 pm and 5 pm this
  afternoon.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including highway 296 to Chief Joseph. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 50 mph or gusts
of 75 mph or more can lead to property damage.

&&

$$

WYZ003-030200-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Cody Foothills-
Including the cities of Cody and Meeteetse
1146 AM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight. The strongest winds will
  likely be between 2 pm and 5 pm this afternoon.

* WINDS...West 35 to 45 mph with gusts to 60 mph. Even stronger
  winds over 80 mph are possible between Cody and Clark between 2
  pm and 5 pm this afternoon.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along highway 120 between Meeteetse Rim and north to Cody and 
  Clark. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ030-030200-
/O.CON.KRIW.HW.W.0015.181102T1800Z-181103T0600Z/
East Sweetwater County-
Including the city of Wamsutter
1146 AM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Noon today through midnight tonight.

* WINDS...West 35 to 45 mph with gusts to 60 mph expected.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 80. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ019-030200-
/O.CON.KRIW.HW.W.0015.181102T1800Z-181103T0600Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
1146 AM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Noon today through midnight tonight.

* WINDS...West 30 to 40 mph with gusts to 65 mph expected.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including 287 and 789 between Sweetwater 
  Station and Muddy Gap. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$
6 follow-up statements
110 
WWUS75 KRIW 022051
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
251 PM MDT Fri Nov 2 2018

...Very Strong Winds in Parts of North, Central, and South-
central Wyoming This Morning Into the Evening... ...Very Strong
Winds in Northern Johnson County late Tonight through Saturday
Morning...

.An approaching weather system will bring with strong to very
strong winds to a large part of the area Today. Some areas in
from the Cody Foothills south to Sweetwater County could see very
strong winds this morning into the evening.

WYZ016-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Upper Wind River Basin-
Including the city of Dubois
251 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight.

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph expected.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways including 20 26 between Crowheart and 
  Dubois. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ002-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Absaroka Mountains-
Including the city of Pahaska
251 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight. The strongest winds will
  likely be through 6 pm today. 

* WINDS...West 45 to 55 mph with gusts to 75 mph expected. Even
  stronger winds are possible through 5 pm this afternoon. A peak
  wind gust to 80 mph has already been reported on Chief Joseph
  Highway at 1 pm this afternoon. 

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including highway 296 to Chief Joseph. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 50 mph or gusts
of 75 mph or more can lead to property damage.

&&

$$

WYZ003-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Cody Foothills-
Including the cities of Cody and Meeteetse
251 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight. The strongest winds will
  likely be 6 pm today. Peak winds so far have been around 50 mph
  through 230 pm.

* WINDS...West 35 to 45 mph with gusts to 60 mph. Even stronger
  winds over 80 mph are possible between Cody and Clark through 6
  pm today. 

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along highway 120 between Meeteetse Rim and north to Cody and 
  Clark. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ030-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
East Sweetwater County-
Including the city of Wamsutter
251 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Noon today through midnight tonight. Wind gusts around
  55 mph have already been reported early this afternoon.

* WINDS...West 35 to 45 mph with gusts to 60 mph expected.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 80. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ019-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
251 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight.

* WINDS...West 30 to 40 mph with gusts to 65 mph expected.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including 287 and 789 between Sweetwater 
  Station and Muddy Gap. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ010-030600-
/O.CON.KRIW.HW.W.0016.181103T0600Z-181103T1800Z/
Northeast Johnson County-
Including the city of Buffalo
251 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
NOON MDT SATURDAY...

* TIMING...Midnight tonight through Noon Saturday

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 25 and Interstate 
  90. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$
668 
WWUS75 KRIW 030031
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
631 PM MDT Fri Nov 2 2018

...Very Strong Winds in Parts of North, Central, and South-
central Wyoming through Midnight Friday Night...

...Very Strong Winds in Northern Johnson County late Tonight 
through Saturday Morning...

.A strong storm system will continue to bring strong to high winds
across across parts of the area this evening into Saturday 
morning. The strongest winds are expected from the Cody Foothills 
south to Sweetwater County through midnight, and then strongest 
winds are expected across northern Johnson County late tonight 
into Saturday morning. 

WYZ016-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Upper Wind River Basin-
Including the city of Dubois
631 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight.

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph expected.

* MEASURED WINDS...48 mph at the Dubois Airport at 10 AM Friday
  morning.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways including 20 26 between Crowheart and 
  Dubois. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ002-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Absaroka Mountains-
Including the city of Pahaska
631 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight. Wind will gradually weaken
  this evening. 

* WINDS...West 45 to 55 mph with gusts to 75 mph expected. 

* MEASURED WINDS...80 mph along the Chief Joseph Highway at 1245
  PM.  

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including highway 296 to Chief Joseph. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 50 mph or gusts
of 75 mph or more can lead to property damage.

&&

$$

WYZ003-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Cody Foothills-
Including the cities of Cody and Meeteetse
631 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight, but the strongest winds look to
  already have occurred with a gradual weakening trend in most
  areas.  

* WINDS...West 35 to 45 mph with gusts to 60 mph.

* MEASURED WIND....52 mph at the Cody Airport at 1230 PM Friday. 

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along highway 120 between Meeteetse Rim and north to Cody and 
  Clark. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ030-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
East Sweetwater County-
Including the city of Wamsutter
631 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight.  

* WINDS...West 35 to 45 mph with gusts to 60 mph expected.

* MEASURED WINDS...59 mph at the Rock Springs Airport 537 PM
  Friday.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 80. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ019-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
631 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight.

* WINDS...West 30 to 40 mph with gusts to 65 mph expected.

* MEASURED WINDS...46 mph at Jeffery City at 545 PM. 76 mph on a
  ridge top west of Muddy Gap by the Camp Creek RAWS at 250 PM.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including 287 and 789 between Sweetwater 
  Station and Muddy Gap. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ010-030845-
/O.CON.KRIW.HW.W.0016.181103T0600Z-181103T1800Z/
Northeast Johnson County-
Including the city of Buffalo
631 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
NOON MDT SATURDAY...

* TIMING...Midnight tonight through Noon Saturday

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 25 and Interstate 
  90. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

21
782 
WWUS75 KRIW 030305
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
905 PM MDT Fri Nov 2 2018

...Very Strong Winds through midnight across Southeast Fremont and
Eastern Sweetwater Counties through Midnight Friday Night...

...Very Strong Winds in Northern Johnson County late Tonight
through Saturday Morning...

.A strong storm system will continue to bring strong to high
winds across southeast Fremont and eastern Sweetwater counties
through about midnight tonight. Strong to high winds are then 
expected across northern Johnson County late tonight into 
Saturday morning.

WYZ002-003-016-030415-
/O.CAN.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Absaroka Mountains-Cody Foothills-Upper Wind River Basin-
Including the cities of Pahaska, Cody, Meeteetse, and Dubois
905 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING IS CANCELLED...

The National Weather Service in Riverton has cancelled the High
Wind Warning. Winds have weakened significantly, and the high wind
warning has been cancelled.

$$

WYZ030-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
East Sweetwater County-
Including the city of Wamsutter
905 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight.

* WINDS...West 35 to 45 mph with gusts to 60 mph expected.

* MEASURED WINDs...59 mph at the Rock Springs Airport at 537 PM 
  Friday. 

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 80. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ019-030600-
/O.CON.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
905 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* TIMING...Through midnight tonight.

* WINDS...West 30 to 40 mph with gusts to 65 mph expected.

* MEASURED WINDS...47 mph occurred along Beaver Rim at 416 PM. 76
  mph on a ridge top west of Muddy Gap measured by the Camp Creek
  RAWS at 250 PM. 

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including 287 and 789 between Sweetwater 
  Station and Muddy Gap. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

WYZ010-031115-
/O.CON.KRIW.HW.W.0016.181103T0600Z-181103T1800Z/
Northeast Johnson County-
Including the city of Buffalo
905 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
NOON MDT SATURDAY...

* TIMING...Midnight tonight through Noon Saturday

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 25 and Interstate 
  90. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$
519 
WWUS75 KRIW 030538
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1138 PM MDT Fri Nov 2 2018

...Very Strong Winds in Northern Johnson County Saturday Morning...

.A strong storm system will continue to bring strong to high
winds across northern Johnson County Saturday morning.

WYZ030-030645-
/O.EXP.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
East Sweetwater County-
Including the city of Wamsutter
1138 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING WILL EXPIRE AT MIDNIGHT MDT TONIGHT...

Winds have weakened, and the high wind warning will be allowed to
expire at midnight.

$$

WYZ019-030645-
/O.EXP.KRIW.HW.W.0015.000000T0000Z-181103T0600Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
1138 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING WILL EXPIRE AT MIDNIGHT MDT TONIGHT...

Winds have weakened, and the high wind warning will be allowed to
expire at midnight.

$$

WYZ010-031800-
/O.CON.KRIW.HW.W.0016.181103T0600Z-181103T1800Z/
Northeast Johnson County-
Including the city of Buffalo
1138 PM MDT Fri Nov 2 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY...

* TIMING...Through Noon Saturday

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 25 and Interstate 
  90. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$

21
530 
WWUS75 KRIW 030844
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
244 AM MDT Sat Nov 3 2018

...Very Strong Winds in Northern Johnson County This Morning...

.A strong storm system will continue to bring strong to high
winds across northern Johnson County this morning.

WYZ010-031800-
/O.CON.KRIW.HW.W.0016.000000T0000Z-181103T1800Z/
Northeast Johnson County-
Including the city of Buffalo
244 AM MDT Sat Nov 3 2018

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* TIMING...Through noon today. 

* WINDS...Northwest 35 to 45 mph with gusts to 60 mph.

* IMPACTS...Blowover risk to high-profile, lightweight vehicles 
  along area highways, including Interstate 25 and Interstate 
  90. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

&&

$$
433 
WWUS75 KRIW 031603
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1003 AM MDT Sat Nov 3 2018


WYZ010-031715-
/O.CAN.KRIW.HW.W.0016.000000T0000Z-181103T1800Z/
Northeast Johnson County-
Including the city of Buffalo
1003 AM MDT Sat Nov 3 2018

...HIGH WIND WARNING IS CANCELLED...

The National Weather Service in Riverton has cancelled the High
Wind Warning. 

The strongest winds have ended so the high wind warning has been
cancelled. Wind gusts to 40 to 50 mph will still be possible into
the afternoon.

$$

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 Nov 2, 11:15 AM MDT, 31 minutes earlier.

Area forecast discussion, Nov 2, 11:15 AM MDT, 31 minutes before
Area Forecast Discussion
National Weather Service Riverton WY
1115 AM MDT Fri Nov 2 2018

.SHORT TERM...Today through Sunday night
Issued at 210 AM MDT Fri Nov 2 2018

A much stronger system will move in quickly today from the northwest
and race southeast across the area this afternoon and evening. The
northwest mountains will likely see 3 to 8 inches from this storm
with the southwest mountains more in the 2 to 6 inch range. Very
strong mountain top flow, rapidly falling pressures in eastern WY
and front causing rapid rises in eastern ID will set the stage for
strong to possibly high winds across much of the area.

The Cody Foothills and east slope of the Absarokas could see a
mountain wave event with 35-40kt into the barrier and upstream
sounding showing a mountain top inversion (around H7). Models
currently look like the waves will be close to breaking but not
reflecting at the surface. Still, I don't see anything to stop the
higher winds aloft from mixing down so nearby showers could easily
bring high winds down to the surface. The Dubois area also looks
quite windy. A High Wind Warning has been issued for these areas
from 9 AM through midnight. Strongest winds will probably be mid-day
through early evening. Eastern Sweetwater up to the Green Mountains
area will also see high winds. Strong pressure gradient and 50kt H7
winds will mix down and cause high winds. So, a High Wind Warning
has been issued for today from noon until midnight.

There will probably be a few rain showers east of the divide with
trough passage Friday evening. Another southward moving upper low
will move across far western SD late Friday night into Saturday
morning with strong north wind developing around BYG. With a tight
post-frontal gradient out of a favorable direction Saturday morning
we thought a High Wind Watch was warranted. A period of rain showers
will likely drop southward ahead of this system and with frontal
passage. Temps will be mild Friday (mid 50s to lower 60s) so it'll
take quite a drop to change any showers over to snow but there could
be some transition trying early Saturday before snow chances
increase by sunrise Saturday. The showers look to taper off in most
areas Saturday morning with gusty winds continuing until mid
afternoon.

The next and possibly strongest system yet approaches Sunday with
snow rapidly developing in the northwest in the early morning and
spreading south east through noon. There will likely be some solid
advisory amounts from this storm with the potential for some warning
amounts due to steep lapse rates setting up to work on favorable jet
streak dynamics, qg forcing and very favorable dendritic growth zone
temps by Sunday evening. Many areas will be windy again with this
system. Many of the areas east of the divide will be rain during the
day Sunday but will quickly change over to snow after sunset.

.LONG TERM...Monday through Friday
Issued at 210 AM MDT Fri Nov 2 2018

Snow lingers over the mountains on Monday. Some snow to occur east
of the divide Monday morning before ending in the afternoon. Minor
snowfall accumulation is expected at this time. Cold day expected
on Monday. The unsettled weather pattern continues Monday night
through Wednesday in a moist NW flow aloft. Periods of snow for
the mountains with some valley snow at times in the west. As for
precipitation east of the divide, most places will be dry, but
some rain or snow showers could occur in the north Wednesday into
Wed evening. Brisk wind at times over the region Tue through Wed.
Precipitation decreases and ends later Wed night. Thursday looks
dry and cold for the area. Next Friday the models differ with the
GFS showing yet another weather system impacting the west. The
ECMWF model is dry next Friday in the west until late in the day.
Will go with isolated mountain snow showers for now and see how
things look in future model runs.

&&

.AVIATION...For the 12Z TAFS through 12Z Saturday morning
Issued at 210 AM MDT Fri Nov 2 2018

West of the Continental Divide...(KJAC, KRKS, KPNA, KBPI)

Another wave of mountain snow/valley rain pull across the area in
the afternoon into the overnight hours. Although the best shot for
precip will once again occur over the far west, there will be a
chance for some shower activity impacting the entire area. The
heaviest and most widespread precip is expected to impact the area
between between 21Z Friday and 03Z Saturday. MVFR conditions are
likely at times at KJAC terminal especially in the 21Z and 03Z time
frame. Very windy and/or low-level wind shear is expected for much
of the TAF period before lessening by around 12Z Saturday.

East of the Continental Divide...(KCPR, KCOD, KRIW, KLND, KWRL)

The main concern will be very windy westerly wind and/or low-level
wind shear developing over much of the area and lasting through the
night in some places.  Scattered mountain snow/valley rain showers
are expected to redevelop by mid to late afternoon, and spread
southeast across the area. These showers will aid in mixing some
very strong winds down to the surface. Although showers will
decrease by late evening, some areas especially over the east could
see some activity continue through the night. Mainly dry conditions
are expected for most of Saturday with less wind.

Please see the Aviation Weather Center and/or CWSU ZDV and ZLC for
the latest information on icing and turbulence forecasts.

&&

.FIRE WEATHER...
Issued AT 210 AM MDT Fri Nov 2 2018

Today will once again see snow in the western mountains with strong
to very strong winds developing across many areas. The strongest
winds will likely extend from the Cody Foothills south to Dubois and
in the wind corridor from  Eastern Sweetwater County through the
Green Mountains. Temperatures and minimum RHs will increase from
yesterday in most areas.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
High Wind Warning from 9 AM this morning to midnight MDT tonight
for WYZ002-003-016.

High Wind Warning from noon today to midnight MDT tonight for
WYZ019-030.

High Wind Watch from late tonight through Saturday afternoon for
WYZ010.

&&

SHORT TERM...Hulme/Skrbac
LONG TERM...AR
AVIATION...Hattings
FIRE WEATHER...Hulme
Hazardous weather outlook, Nov 2, 3:21 AM MDT, 8 hours 25 minutes before
Hazardous Weather Outlook
National Weather Service Riverton WY
321 AM MDT Fri Nov 2 2018

WYZ001>020-022>030-031100-
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-
321 AM MDT Fri Nov 2 2018

...High Wind Warning for parts of North, Central, and South-
central Wyoming this Morning through Midnight...

...High Wind Watch for Northern Johnson County from Midnight
Tonight through Saturday Afternoon...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Strong to potential high winds for parts of North, Central, and
South-Central Wyoming.

Strong wind possible in Northern Johnson County late tonight.

Snow is expected to increase across the western mountains this
evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Saturday...Snow is expected to continue across the western
mountains Saturday morning. Very windy conditions are possible in
Northern Johnson County Saturday.

Sunday and Sunday night...Snow likely in the western mountains.
A chance of rain and snow western valleys. A chance of rain and
snow east of the divide Sunday night into Monday morning.

.SPOTTER INFORMATION STATEMENT...

Spotters are urged to report snowfall amounts. Thank you.

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 2, 2:58 AM MDTHigh Wind WatchRIWJohnson9 hr
Nov 2, 2:58 AM MDTHigh Wind WarningRIWFremont, Hot Springs, Natrona, Park, Sweetwater21 hr
Nov 2, 1:17 PM MDTWinter Storm WatchRIWFremont, Hot Springs, Lincoln, Park, Sublette, Teton25 hr
Nov 2, 1:17 PM MDTWinter Weather AdvisoryRIWFremont, Lincoln, Sublette, Teton8 hr
Nov 2, 4:29 PM MDTSpecial Weather StatementRIWTeton31 min

Nearby

High Wind Warnings in Wyoming, 2018Every high wind 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.