Alert archive / Wyoming / High Wind Warnings in 2008

High Wind Warning 1, NWS Riverton, WY

January 4, 20084 counties in Wyoming

NWS Riverton, WY issued this high wind warning at Jan 4, 2008, 12:16 PM MST for 4 counties in Wyoming. It took effect at Jan 4, 2008, 5:00 PM MST. It was in force for 19 hr. 5 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
Jan 4, 2008, 12:16 PM MST (19:16 UTC)
In effect from
Jan 4, 2008, 5:00 PM MST
Expired
Jan 5, 2008, 11:59 AM MST
In force
19 hr
Issued by
NWS Riverton, WY

Counties Fremont County, WY, Johnson County, WY, Natrona County, WY, Sweetwater County, WY

The radar

The Riverton/Lander radar (KRIW), 63 km from the middle of the area, began a volume at 19:13 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
Jan 4, 6:00 PM MSTNON-TSTM WND GST 5610 Wsw Muddy Gap, WYSUSTAINED 29
Jan 4, 7:00 PM MSTNON-TSTM WND GST 6010 Wsw Muddy Gap, WYSUSTAINED 32
Jan 4, 7:50 PM MSTNON-TSTM WND GST 6110 Wsw Muddy Gap, WYSUSTAINED 37
Jan 4, 8:50 PM MSTNON-TSTM WND GST 6410 Wsw Muddy Gap, WYSUSTAINED 30
Jan 4, 9:06 PM MSTNON-TSTM WND GST 5160 Nne Rawlins, WYSUSTAINED 40

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 57 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 2008-01-04Temperature 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 2008-01-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.19395878Sfc1 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
1714 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
261 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS75 KRIW 041916
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1216 PM MST FRI JAN 4 2008

WYZ011-050330-
/O.UPG.KRIW.HW.A.0001.080105T0000Z-080106T0000Z/
/O.NEW.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
1216 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

SOUTHWEST WINDS ARE FORECAST TO INCREASE TONIGHT TO SPEEDS OF 40
MPH WITH GUSTS OF UP TO 60 MPH IN SOUTHEAST JOHNSON COUNTY. THEREFORE
THE HIGH WIND WATCH HAS BEEN UPGRADED TO A HIGH WIND WARNING. THE
HIGH WIND WARNING IS IN EFFECT FROM 5 PM MST THIS EVENING THROUGH
5 PM MST SATURDAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS ALONG INTERSTATE 25.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-050330-
/O.UPG.KRIW.HW.A.0001.080105T0000Z-080106T0000Z/
/O.NEW.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITY OF...CASPER
1216 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

SOUTHWEST WINDS ARE EXPECTED TO INCREASE TO 40 MPH ALONG WITH
GUSTS TO 65 MPH ACROSS MUCH OF NATRONA COUNTY INCLUDING THE CITY
OF CASPER. THEREFORE...THE HIGH WIND WATCH HAS BEEN UPGRADED TO A
HIGH WIND WARNING FROM 5 PM MST THIS EVENING THROUGH 5 PM MST
SATURDAY. WYOMING BOULEVARD SURROUNDING CASPER WILL ESPECIALLY
SUSCEPTIBLE TO THESE STRONG WINDS.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WATCH AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS AND
DANGEROUS CROSS WINDS ALONG INTERSTATE 25...HIGHWAY 20 26 WEST OF
CASPER...AND HIGHWAY 220 SOUTHWEST OF CASPER.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ019-050330-
/O.UPG.KRIW.HW.A.0001.080105T0000Z-080106T0000Z/
/O.NEW.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
1216 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

SOUTHWEST WINDS ARE FORECAST TO INCREASE TONIGHT TO 40 MPH WITH
GUSTS OF UP TO 75 MPH. THEREFORE...THE HIGH WIND WATCH HAS BEEN
UPGRADED TO A HIGH WIND WARNING FOR 5 PM MST THIS EVENING THROUGH
5 PM MST SATURDAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS ALONG HIGHWAY 287 FROM SWEETWATER
STATION TO MUDDY GAP AS WELL AS HIGHWAY 135 FROM BEAVER RIM TO
SWEETWATER STATION. IN ADDITION...STRONG WINDS WILL CAUSE
CONSIDERABLE BLOWING AND DRIFTING SNOW IN SOME LOCAL AREAS WHICH
WILL LOWER THE VISIBILITY TO NEAR ZERO AT TIMES.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ022-050330-
/O.NEW.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
CASPER MOUNTAIN-
1216 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. 

SOUTHWEST WINDS ARE FORECAST TO INCREASE TONIGHT TO 40 MPH WITH
GUSTS OF UP TO 60 MPH. THEREFORE...THE HIGH WIND WATCH HAS BEEN
UPGRADED TO A HIGH WIND WARNING FOR 5 PM MST THIS EVENING THROUGH
5 PM MST SATURDAY. IN ADDITION...THESE STRONG WINDS WILL CREATE
AREAS OF BLOWING AND DRIFTING SNOW WHICH WILL LOWER THE VISIBILITY
TO NEAR ZERO AT TIMES.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ030-050330-
/O.NEW.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
1216 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. 

SOUTHWEST WINDS ARE FORECAST TO INCREASE TONIGHT TO 40 MPH WITH
GUSTS OF UP TO 60 MPH. THEREFORE...THE HIGH WIND WATCH HAS BEEN
UPGRADED TO A HIGH WIND WARNING FOR 5 PM MST THIS EVENING THROUGH
5 PM MST SATURDAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WATCH AREA. PERSONS PLANNING TRAVEL IN THE
WATCH AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS AND
DANGEROUS CROSS WINDS ALONG INTERSTATE 80 EAST OF ROCK SPRINGS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

LIPSON
5 follow-up statements
000 
WWUS75 KRIW 041925 CCA
NPWRIW

URGENT - WEATHER MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE RIVERTON WY
1220 PM MST FRI JAN 4 2008

WYZ011-050345-
/O.UPG.KRIW.HW.A.0001.080105T0000Z-080106T0000Z/
/O.NEW.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
1220 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

SOUTHWEST WINDS ARE FORECAST TO INCREASE TONIGHT TO SPEEDS OF 40
MPH WITH GUSTS OF UP TO 60 MPH IN SOUTHEAST JOHNSON COUNTY. THEREFORE
THE HIGH WIND WATCH HAS BEEN UPGRADED TO A HIGH WIND WARNING. THE
HIGH WIND WARNING IS IN EFFECT FROM 5 PM MST THIS EVENING THROUGH
5 PM MST SATURDAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS ALONG INTERSTATE 25.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-050345-
/O.UPG.KRIW.HW.A.0001.080105T0000Z-080106T0000Z/
/O.NEW.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITY OF...CASPER
1220 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

SOUTHWEST WINDS ARE EXPECTED TO INCREASE TO 40 MPH ALONG WITH
GUSTS TO 65 MPH ACROSS MUCH OF NATRONA COUNTY INCLUDING THE CITY
OF CASPER. THEREFORE...THE HIGH WIND WATCH HAS BEEN UPGRADED TO A
HIGH WIND WARNING FROM 5 PM MST THIS EVENING THROUGH 5 PM MST
SATURDAY. WYOMING BOULEVARD SURROUNDING CASPER WILL ESPECIALLY
SUSCEPTIBLE TO THESE STRONG WINDS.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WATCH AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS AND
DANGEROUS CROSS WINDS ALONG INTERSTATE 25...HIGHWAY 20 26 WEST OF
CASPER...AND HIGHWAY 220 SOUTHWEST OF CASPER.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ019-050345-
/O.UPG.KRIW.HW.A.0001.080105T0000Z-080106T0000Z/
/O.NEW.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
1220 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. 

SOUTHWEST WINDS ARE FORECAST TO INCREASE TONIGHT TO 40 MPH WITH
GUSTS OF UP TO 75 MPH. THEREFORE...THE HIGH WIND WATCH HAS BEEN
UPGRADED TO A HIGH WIND WARNING FOR 5 PM MST THIS EVENING THROUGH
5 PM MST SATURDAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS ALONG HIGHWAY 287 FROM SWEETWATER
STATION TO MUDDY GAP AS WELL AS HIGHWAY 135 FROM BEAVER RIM TO
SWEETWATER STATION. IN ADDITION...STRONG WINDS WILL CAUSE
CONSIDERABLE BLOWING AND DRIFTING SNOW IN SOME LOCAL AREAS WHICH
WILL LOWER THE VISIBILITY TO NEAR ZERO AT TIMES.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ022-050345-
/O.COR.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
CASPER MOUNTAIN-
1220 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. 

SOUTHWEST WINDS ARE FORECAST TO INCREASE TONIGHT TO 40 MPH WITH
GUSTS OF UP TO 60 MPH. THUS A HIGH WIND WARNING IS IN EFFECT FROM
5 PM THIS EVENING THROUGH 5 PM MST SATURDAY. IN ADDITION...THESE
STRONG WINDS WILL CREATE AREAS OF BLOWING AND DRIFTING SNOW WHICH
WILL LOWER THE VISIBILITY TO NEAR ZERO AT TIMES.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ030-050345-
/O.COR.KRIW.HW.W.0001.080105T0000Z-080106T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
1220 PM MST FRI JAN 4 2008

...HIGH WIND WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST
SATURDAY. 

SOUTHWEST WINDS ARE FORECAST TO INCREASE TONIGHT TO 40 MPH WITH
GUSTS OF UP TO 60 MPH. THUS A HIGH WIND WARNING IS IN EFFECT FROM 5
PM MST THIS EVENING THROUGH 5 PM MST SATURDAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WATCH AREA. PERSONS PLANNING TRAVEL IN THE
WATCH AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS AND
DANGEROUS CROSS WINDS ALONG INTERSTATE 80 EAST OF ROCK SPRINGS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

LIPSON
000 
WWUS75 KRIW 050308
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
808 PM MST FRI JAN 4 2008

WYZ011-051100-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
808 PM MST FRI JAN 4 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY. 

A SOUTHWEST WIND OF 35 TO 45 MPH WITH GUSTS OVER 60 MPH ARE 
EXPECTED OVERNIGHT AND DURING THE DAY SATURDAY. 

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS ALONG INTERSTATE 25 AND OTHER STATE
HIGHWAYS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-022-051100-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-
INCLUDING THE CITY OF...CASPER
808 PM MST FRI JAN 4 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY. 

A GUSTY SOUTHWEST WIND HAVE BEEN OCCURRING IN NATRONA COUNTY
THIS EVENING AT SPEEDS OF 30 TO 40 MPH WITH GUSTS AROUND 50 MPH.
THROUGH 8 PM MST...THE CASPER AIRPORT HAS LOGGED A PEAK WIND OF 
53 MPH. 

A SOUTHWEST OF 30 TO 40 MPH WILL CONTINUE ACROSS MUCH OF NATRONA
COUNTY OVERNIGHT AND SATURDAY. WIND GUSTS OF 60 TO 70 MPH ARE LIKELY
NEAR CASPER MOUNTAIN AND ALONG OUTER DRIVE SOUTH OF CASPER.
LOCAL WIND SPEEDS OF 50 MPH WITH GUSTS TO 75 MPH ARE EXPECTED 
IN OPEN AREAS OVER CASPER MOUNTAIN.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS WOULD INCLUDE INTERSTATE 25...
HIGHWAY 20 26 WEST OF CASPER...HIGHWAY 220 SOUTHWEST OF CASPER. 

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ019-051100-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
808 PM MST FRI JAN 4 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY. 

A SOUTHWEST WIND OF 35 TO 45 MPH WILL CONTINUE OVERNIGHT AND
SATURDAY. WIND GUSTS BETWEEN 65 AND 75 MPH ARE LIKELY IN THE
HIGHER EXPOSED AREAS. 

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS INCLUDES HIGHWAY 287 FROM
SWEETWATER STATION TO MUDDY GAP...AS WELL AS HIGHWAY 135 FROM
BEAVER RIM TO SWEETWATER STATION. 

IN ADDITION...BLOWING AND DRIFTING SNOW IN EXPECTED IN SOME LOCAL
AREAS WHICH WILL LOWER THE VISIBILITY TO NEAR ZERO AT TIMES.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ030-051100-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
808 PM MST FRI JAN 4 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY. 

A SOUTH TO SOUTHWEST WIND OF 30 TO 40 MPH WITH GUSTS AROUND 60 MPH
ARE LIKELY OVERNIGHT AND SATURDAY. 

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS INCLUDES INTERSTATE 80 EAST OF
ROCK SPRINGS AND OTHER STATE HIGHWAYS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$
000 
WWUS75 KRIW 050507
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1007 PM MST FRI JAN 4 2008

WYZ011-051100-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
1007 PM MST FRI JAN 4 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY. 

A SOUTHWEST WIND OF 35 TO 45 MPH WITH GUSTS OVER 60 MPH ARE
EXPECTED OVERNIGHT AND DURING THE DAY SATURDAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS ALONG INTERSTATE 25 AND OTHER STATE
HIGHWAYS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-022-051100-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-
INCLUDING THE CITY OF...CASPER
1007 PM MST FRI JAN 4 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY. 

A GUSTY SOUTHWEST WIND HAVE BEEN OCCURRING IN NATRONA COUNTY THIS
EVENING AT SPEEDS OF 30 TO 40 MPH WITH GUSTS AROUND 50 MPH.
THROUGH 10 PM MST...THE CASPER AIRPORT HAS LOGGED A PEAK WIND OF 63
MPH.

A SOUTHWEST OF 30 TO 40 MPH WILL CONTINUE ACROSS MUCH OF NATRONA
COUNTY OVERNIGHT AND SATURDAY. WIND GUSTS OF 60 TO 70 MPH ARE
LIKELY NEAR CASPER MOUNTAIN AND ALONG OUTER DRIVE SOUTH OF
CASPER. LOCAL WIND SPEEDS OF 50 MPH WITH GUSTS TO 75 MPH ARE
EXPECTED IN OPEN AREAS OVER CASPER MOUNTAIN.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS WOULD INCLUDE INTERSTATE 25...
HIGHWAY 20 26 WEST OF CASPER...HIGHWAY 220 SOUTHWEST OF CASPER.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ019-051100-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
1007 PM MST FRI JAN 4 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY. 

A SOUTHWEST WIND OF 35 TO 45 MPH WILL CONTINUE OVERNIGHT AND
SATURDAY. WIND GUSTS BETWEEN 65 AND 75 MPH ARE LIKELY IN THE
HIGHER EXPOSED AREAS.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS INCLUDES HIGHWAY 287 FROM
SWEETWATER STATION TO MUDDY GAP...AS WELL AS HIGHWAY 135 FROM
BEAVER RIM TO SWEETWATER STATION.

IN ADDITION...BLOWING AND DRIFTING SNOW IN EXPECTED IN SOME LOCAL
AREAS WHICH WILL LOWER THE VISIBILITY TO NEAR ZERO AT TIMES.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ030-051100-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
1007 PM MST FRI JAN 4 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY. 

A SOUTH TO SOUTHWEST WIND OF 30 TO 40 MPH WITH GUSTS AROUND
60 MPH ARE LIKELY OVERNIGHT AND SATURDAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS INCLUDES INTERSTATE 80 EAST OF
ROCK SPRINGS AND OTHER STATE HIGHWAYS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$
000 
WWUS75 KRIW 050940
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
240 AM MST SAT JAN 5 2008

WYZ011-051900-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
240 AM MST SAT JAN 5 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

A SOUTHWEST WIND OF 35 TO 45 MPH WITH GUSTS OVER 60 MPH ARE
EXPECTED TODAY.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS ALONG INTERSTATE 25 AND OTHER STATE
HIGHWAYS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ020-022-051900-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-
INCLUDING THE CITY OF...CASPER
240 AM MST SAT JAN 5 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

A GUSTY SOUTHWEST WIND HAVE BEEN OCCURRING IN NATRONA COUNTY THIS
MORNING AT SPEEDS OF 35 TO 45 MPH WITH GUSTS OVER 60 MPH AT TIMES.
THROUGH 10 PM MST...THE CASPER AIRPORT HAS LOGGED A PEAK WIND OF
63 MPH.

A SOUTHWEST WIND OF 40 TO 50 MPH WILL CONTINUE ACROSS MUCH OF
NATRONA COUNTY TODAY. WIND GUSTS OF 60 TO 70 MPH ARE LIKELY NEAR
CASPER MOUNTAIN AND ALONG OUTER DRIVE SOUTH OF CASPER. LOCAL WIND
SPEEDS OF 50 MPH WITH GUSTS TO 75 MPH ARE EXPECTED IN OPEN AREAS
OVER CASPER MOUNTAIN.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS WOULD INCLUDE INTERSTATE 25...
HIGHWAY 20 26 WEST OF CASPER...HIGHWAY 220 SOUTHWEST OF CASPER.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ019-051900-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
INCLUDING THE CITY OF...JEFFREY CITY
240 AM MST SAT JAN 5 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

A SOUTHWEST WIND OF 40 TO 50 MPH WILL CONTINUE TODAY. WIND GUSTS
BETWEEN 65 AND 75 MPH ARE LIKELY IN THE HIGHER EXPOSED AREAS.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING AREA. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS INCLUDES HIGHWAY 287 FROM
SWEETWATER STATION TO MUDDY GAP...AS WELL AS HIGHWAY 135 FROM
BEAVER RIM TO SWEETWATER STATION.

IN ADDITION...BLOWING AND DRIFTING SNOW IN EXPECTED IN SOME LOCAL
AREAS WHICH WILL LOWER THE VISIBILITY TO NEAR ZERO AT TIMES.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ030-051900-
/O.CON.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
EAST SWEETWATER COUNTY-
INCLUDING THE CITY OF...WAMSUTTER
240 AM MST SAT JAN 5 2008

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON. 

A SOUTH TO SOUTHWEST WIND OF 35 TO 45 MPH WITH GUSTS AROUND 60 MPH
ARE EXPECTED TODAY. ALSO...SOME SNOW WILL FALL TODAY...WITH
SIGNIFICANT BLOWING AND DRIFTING SNOW POSSIBLE. VISIBILITY COULD BE
REDUCED BELOW ONE QUARTER MILE AT TIMES.

LIGHT WEIGHT AND HIGH PROFILE VEHICLES SHOULD CONSIDER ALTERING
TRAVEL PLANS IN THE WARNING. PERSONS PLANNING TRAVEL IN THE
WARNING AREA SHOULD BE PREPARED FOR STRONG AND SUDDEN WIND GUSTS
AND DANGEROUS CROSS WINDS. THIS INCLUDES INTERSTATE 80 EAST OF
ROCK SPRINGS AND OTHER STATE HIGHWAYS.

REMEMBER...A HIGH WIND WARNING MEANS HAZARDOUS WEATHER CONDITIONS
ARE IMMINENT OR HIGHLY LIKELY.

$$
000 
WWUS75 KRIW 051859
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1159 AM MST SAT JAN 5 2008


WYZ011-019-020-022-030-052000-
/O.CAN.KRIW.HW.W.0001.000000T0000Z-080106T0000Z/
SOUTHEAST JOHNSON COUNTY-GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-
EAST SWEETWATER COUNTY-
INCLUDING THE CITIES OF...KAYCEE...JEFFREY CITY...CASPER...
WAMSUTTER
1159 AM MST SAT JAN 5 2008

...HIGH WIND WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELED THE HIGH
WIND WARNING. 

HIGH WINDS HAVE WEAKENED TO BELOW HIGH WIND CRITERIA THIS MORNING
ALLOWING THE HIGH WIND WARNING TO BE CANCELED. 

WHILE THE HIGH WIND WARNING HAS BEEN CANCELED.... WINDS OF 25
TO 30 MPH WITH GUSTS UP TO 50 MPH ARE STILL POSSIBLE THROUGH THE
AFTERNOON HOURS TODAY. HIGH PROFILE VEHICLES WILL NEED TO CONTINUE
TO USE CAUTION THIS AFTERNOON DURING HAZARDOUS CROSS WIND
SITUATIONS ON INTERSTATE 25 THROUGH AND NORTH OF CASPER...AS WELL
AS INTERSTATE 80 EAST OF ROCK SPRINGS. 

$$

BRANHAM

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 Jan 4, 8:09 AM MST, 4 hours 7 minutes earlier.

Area forecast discussion, Jan 4, 8:09 AM MST, 4 hours 7 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
809 AM MST FRI JAN 4 2008

.UPDATE...
SENT OUT A MINOR UPDATE TO INCREASE MAXIMUM TEMPS FOR
TODAY...MAINLY FOR THE CODY FOOTHILLS AND NORTHEAST JOHNSON
COUNTY. CODY ALREADY IN THE LOWER 40S THIS MORNING AND BUFFALO
HAVING THE POTENTIAL TO SPIKE INTO THE LOWER 50S ONCE AGAIN WITH
THE NEXT MOUNTAIN WAVE MOVING DOWN THE EAST SLOPES OF THE BIG HORN
MOUNTAINS.

&&

.PREV DISCUSSION... /ISSUED 235 AM MST FRI JAN 4 2008/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT
ACTIVE PATTERN SETTING UP FOR THE WEEKEND AS A POWERFUL UPPER LOW
DIGS TOWARDS THE WEST COAST. THIS STORM TO BRING SOME STRONG WINDS
TO THE MOUNTAINS AND WIN CORRIDORS...THEN HEAVY SNOW FOR MUCH OF
THE WEST TONIGHT INTO SATURDAY. INITIAL SHORTWAVE LIFTING
NORTHEAST OVER CENTRAL IDAHO THIS MORNING...SHEARING AS IT DOES.
SOME LIGHT ECHOS ON THE KSFX RADAR OVER THE WEST MOUNTAINS...VERY
LIGHT SNOW OVER THE HIGHER ELEVATIONS. SOME WEAK TRANSITORY
RIDGING MOVES THROUGH THIS MORNING. SOUTHWEST INCREASES BEHIND THE
RIDGE WITH A RAPIDLY TIGHTENING GRADIENT. THIS WILL MAKE FOR SOME
PRETTY STRONG WINDS THIS AFTERNOON THROUGH SATURDAY. EXPECT THE
HIGHEST WINDS TO BE OVER THE GREEN MOUNTAINS AREA INTO NATRONA
COUNTY AND EVEN SOUTHERN JOHNSON COUNTY. HIGH WIND WATCH IS IN
EFFECT FOR THIS AREA FOR TONIGHT AND TOMORROW AND WILL LET THIS
RUN. SOUTHWEST WINDS OF 40 TO 50 MPH WITH GUSTS TO 70 MPH ARE
POSSIBLE IN THESE AREAS. OTHER AREAS WILL BE VERY WINDY BUT SHOULD
STAY BELOW HIGH WIND. SHOULD START TO SEE SOME OF THE INVERSIONS
WEAKEN TODAY AS CLOUDS MOVING THROUGH HAVE ALLOWED TEMPERATURES TO
MODERATE OVER PREVIOUS NIGHTS LOWS. HAVE WARMED SOME OF THESE
BASIN/VALLEY MAX TEMPS TODAY CLOSER TO GUIDANCE.

NOW FOR THE SNOW...EXPECT LITTLE ACTIVITY TODAY AS LITTLE DYNAMICS
IN THE FLOW AND MOISTURE IS LIMITED. MODELS HAVE BEEN SHOWING AN
EXCELLENT MOISTURE PLUME FOR THE PAST SEVERAL DAYS MOVING ACROSS
THE SIERRAS AND BRINGING COPIOUS AMOUNTS OF QPF FOR WESTERN
WYOMING. NORMALLY WOULD DISCOUNT THIS...EXCEPT FOR THE STRENGTH OF
THE ASSOCIATED DYNAMICS THAT WILL ACCOMPANY THE MOISTURE. THE
MOISTURE ARRIVES EARLY THIS EVENING IN THE WEST. WILL HAVE A FEW
JET STREAKS MOVING THROUGH OVERNIGHT EACH BRINGING A PERIOD OF
HEAVY SNOW WITH GOOD CONVERGENCE/DIVERGENCE COUPLETING...AND WILL
HAVE ISENTROPIC ASCENT. FOR SATURDAY WILL HAVE BAROCLINIC LEAF
DYNAMICS MOVING ACROSS THE AREA. H7 TEMPS FALL FROM -6C TO -14C BY
00Z SUNDAY. SO EXPECT THERE TO BE A GOOD 12 TO 18 HOURS OF
SNOWFALL WHICH COULD FALL AT 1 TO 2 INCHES PER HOUR AT TIMES. THE
TETONS...GROS VENTRES...WEST WIND RIVERS...SOUTHWEST
ABSAROKAS...SOUTHERN YELLOWSTONE...AND THE SALT/WYOMING RANGES
SHOULD GET 10 TO 20 INCHES OF SNOWFALL BY SATURDAY
AFTERNOON...WHILE JACKSON HOLE...STAR VALLEY AND THE NORTHERN
UPPER GREEN RIVER BASIN SHOULD SEE 5 TO 10 INCHES. THE REMAINDER
OF THE WESTERN MOUNTAINS AND BASINS SHOULD PROBABLY SEE ADVISORY
AMOUNTS. WILL CONTINUE THE WINTER STORM WATCH FOR NOW...WHICH
STARTS AT 5 PM AND GOES THROUGH 5 PM SATURDAY FOR THE AREAS LISTED
ABOVE. SWEETWATER COUNTY SHOULD SEE A FEW HOURS SATURDAY AFTERNOON
OF SNOW BUT AT THIS POINT SHOULD BE LESS THAN ADVISORY.

MOIST UNSTABLE WEST SOUTHWEST FLOW WILL KEEP SNOW LINGERING IN THE
WEST...WITH ANOTHER WAVE APPROACHING FOR SUNDAY AND SUNDAY NIGHT.
THIS ONE WONT BE AS STRONG AS THE PREVIOUS SYSTEM...BUT SEVERAL
INCHES IN THE MOUNTAINS ARE POSSIBLE.

LONG TERM...MONDAY THROUGH FRIDAY
EXTENDED MODELS SHOW CONSIDERABLE VARIATION IN TROUGHS AND RIDGES
AND NO CLEAR FRONT RUNNER TO GO WITH. OVERALL EXTENDED FORECAST IS
A BLEND. MAIN FLOW PATTERN COULD VARY FROM NORTHWEST TO SOUTHWEST
ALOFT AND OVERALL LOOKS LIKE WHICHEVER DIRECTION HAPPENS...THERE
WILL BE A HIGH PROBABILITY OF AT LEAST LIGHT SNOWFALL IN THE WESTERN
MOUNTAINS AND VALLEYS WITH A LOW PROBABILITY EAST OF THE CONTINENTAL
DIVIDE. WIND SPEEDS SHOULD BE RATHER HIGH IN THE MOUNTAINS WITH
MUCH LESS CERTAINTY IN THE LOWER ELEVATIONS AND DIRECTIONS ARE
PROBLEMATIC. MANY AREAS THAT BLOW FROM THE SOUTHWEST DO NOT FAVOR
NORTHWEST FLOW...WHILE THOSE AREAS THAT BLOW WITH NORTHWEST FLOW
DO NOT FAVOR SOUTHWEST FLOW. INVERSIONS WILL LIKELY ALSO HAVE A
BIG IMPACT ON WHICH AREAS HAVE WIND AND WHERE THE WINDS WILL
REMAIN LIGHT AND VARIABLE. THE INVERSIONS WILL ALSO BE A PROBLEM
WITH TEMPERATURES. OVERALL KEPT TEMPERATURES ON THE COLD SIDE AND
TRIED TO KEEP WIND DOWN IN THE BASINS.  NO SIGNIFICANT CHANGES HAVE
BEEN MADE TO THE EXTENDED FORECAST AT THIS TIME DUE TO MODEL SPREAD.

AVIATION...
VFR CONDITIONS WILL PREVAIL OVER THE REGION THROUGH 00Z SATURDAY.
WINDY CONDITIONS WILL OCCUR AROUND KCPR ALL DAY INTO THE EVENING
HOURS. THE WIND WILL ALSO BE ON THE INCREASE ACROSS MUCH OF WY
FRIDAY NIGHT. CLOUDS WILL LOWER IN FAR WEST WY AFTER 00Z SATURDAY
WITH AREAS OF SNOW DEVELOPING. MVFR CONDITIONS WILL PREVAIL WITH
LOCAL IFR CONDITIONS DEVELOPING BY 06Z SATURDAY IN WESTERN WY.

FIRE WEATHER...
ACTIVE PATTERN SHAPING UP FOR THE WEEKEND AS A POWERFUL STORM
SYSTEM TO MOVE THROUGH. SIGNIFICANT SNOWFALL IS EXPECTED WITH 10
TO 20 INCHES LIKELY IN THE MOUNTAINS AND 5 TO 10 INCHES IN THE
VALLEYS OF WESTERN WYOMING. WINTER STORM WATCHES ARE IN EFFECT
FROM 5 PM TODAY THROUGH 5 PM TOMORROW FOR MUCH OF WESTERN WYOMING.  STRONG
SOUTHWEST WINDS ARE EXPECTED TO INCREASE TODAY...IN THE WIND PRONE
AREAS OF CENTRAL WYOMING. HIGH WIND WATCH IS IN EFFECT FROM 5 PM
TODAY THROUGH 5 PM SATURDAY. STRONG SOUTHWEST WINDS ARE ALSO
EXPECTED IN THE MOUNTAINS...MIXING INTO THE MUCH OF THE FORECAST
AREA TONIGHT INTO SATURDAY. ANOTHER SYSTEM IS EXPECTED TO MOVE
THROUGH SUNDAY AND SUNDAY NIGHT...THOUGH IS EXPECTED TO BE WEAKER.

RIW WATCHES/WARNINGS/ADVISORIES...
WINTER STORM WATCH FROM THIS AFTERNOON THROUGH SATURDAY
AFTERNOON FOR WYZ001-002-012>015-023-024.

HIGH WIND WATCH FROM THIS AFTERNOON THROUGH SATURDAY AFTERNOON
FOR WYZ011-019-020.

SHORT TERM...TWB
LONG TERM...C.BAKER
AVIATION...AR

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
WINTER STORM WATCH FROM 5 PM MST THIS AFTERNOON THROUGH SATURDAY
AFTERNOON FOR WYZ001-002-012>015-023-024.

HIGH WIND WATCH FROM 5 PM MST THIS AFTERNOON THROUGH SATURDAY
AFTERNOON FOR WYZ011-019-020.

&&

UPDATE...CHURCH
SHORT TERM...TWB
LONG TERM...C.BAKER
AVIATION...C.BAKER
FIRE WEATHER...TWB
Hazardous weather outlook, Jan 4, 5:01 AM MST, 7 hours 15 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
501 AM MST FRI JAN 4 2008

WYZ001>020-022>030-051201-
ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST-
BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS-
EAST SWEETWATER COUNTY-FLAMING GORGE-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS-
NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN-
NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS-
ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES-
SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN-
SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY-
TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN-
UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN-
WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST-
YELLOWSTONE NATIONAL PARK-
501 AM MST FRI JAN 4 2008

...HIGH WIND WATCH FOR PARTS OF EAST CENTRAL WYOMING LATE
5 PM THIS EVENING THROUGH 5 PM SATURDAY AFTERNOON...

...WINTER STORM WATCH FOR MOST OF WESTERN WYOMING 5 PM THIS
EVENING THROUGH 5 PM SATURDAY AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

A POWERFUL PACIFIC STORM WILL IMPACT WYOMING BEGINNING THIS EVENING
AND CONTINUE THROUGH SATURDAY.  SOUTHWEST WINDS WILL INCREASE TODAY
OVER THE WIND PRONE AREAS TODAY WITH SPEEDS OF 20 TO 30 MPH WITH
GUSTS TO 45 MPH.  THIS EVENING...THE WIND SPEEDS WILL INCREASE TO
40 TO 50 MPH WITH GUSTS TO 70 MPH OVER SOUTHEAST FREMONT...NATRONA
AND SOUTHERN JOHNSON COUNTIES.  THESE WINDS WILL CONTINUE THROUGH
MUCH OF SATURDAY.  OTHERWISE WINDS WILL MIX DOWN INTO THE REMAINDER
OF THE WEST AND CENTRAL BASINS TONIGHT INTO SATURDAY WITH SPEEDS OF
20 TO 30 MPH.

THE SECOND IMPACT WILL BE HEAVY SNOW IN WESTERN WYOMING.  THE SNOW
WILL DEVELOP BY LATE AFTERNOON...INCREASING IN INTENSITY THIS
EVENING BECOMING HEAVY AT TIMES TONIGHT CONTINUING THROUGH
SATURDAY.  SNOWFALL RATES OF 1 TO 2 INCHES ARE POSSIBLE AT TIMES.
ALSO AREAS OF BLOWING SNOW WILL FURTHER REDUCE VISIBILITY.  TRAVEL
WILL BECOME VERY DIFFICULT ACROSS THE WEST TONIGHT AS ROADS BECOME
SNOWPACKED AND DRIFTED IN SPOTS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE STRONG SOUTHWEST WINDS WILL CONTINUE SATURDAY...DIMINISHING SOME
BY SATURDAY EVENING.  THEN THEY WILL TAPER OVERNIGHT.

THE SNOWFALL IN THE WEST CONTINUES AS WELL SATURDAY WITH 10 TO 20
INCHES POSSIBLE IN THE MOUNTAINS...AND 5 TO 10 INCHES IN THE
VALLEYS AND BASINS.  TRAVEL WILL REMAIN TREACHEROUS AS ROADS WILL BE
SNOWPACKED AND SOUTH TOP SOUTHWEST WINDS OF 20 TO 30 MPH IN OPEN
AREAS WILL CAUSE SIGNIFICANT BLOWING SNOW.

ANOTHER SYSTEM WILL MOVE THROUGH SUNDAY AND SUNDAY NIGHT BRINGING
ADDITIONAL SNOWFALL TO THE WEST.  SNOWFALL IS EXPECTED TO BE MUCH
LESS THAN THE FIRST STORM.  WINDS WILL ALSO CONTINUE AS WELL.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ASKED TO REPORT STRONG WINDS...SNOWFALL AND SIGNIFICANT
BLOWING SNOW TONIGHT AND SATURDAY.

TEAM RIVERTON

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 4, 3:15 PM MSTSnow AdvisoryRIWFremont, Lincoln, Sublette, Sweetwater26 hr
Jan 4, 3:15 PM MSTWinter Storm WarningRIWFremont, Hot Springs, Lincoln, Park, Sublette, Teton26 hr

Nearby

High Wind Warnings in Wyoming, 2008Every high wind warning in 2008

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.