Winter Storm Warning 2, NWS Riverton, WY

000 
WWUS45 KRIW 171923
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1223 PM MST THU JAN 17 2008

...A SIGNIFICANT WINTER STORM TO IMPACT THE BIG HORN MOUNTAINS AND 
ADJACENT LOWER ELEVATIONS OF JOHNSON COUNTY THROUGH FRIDAY MORNING...

.A DEVELOPING UPPER LEVEL STORM SYSTEM IN MONTANA IS EXPECTED TO DROP
SOUTH INTO FAR NORTHERN WYOMING THIS AFTERNOON AND LINGER INTO FRIDAY.
THE COMBINATION OF SNOWFALL AND STRONG NORTH WINDS WILL CREATE A
SIGNIFICANT WINTER STORM FOR THE BIG HORN MOUNTAINS AND LOWER
ELEVATIONS OF JOHNSON COUNTY IN AND NEAR BUFFALO...INCLUDING
INTERSTATE 90 EAST OF BUFFALO AND INTERSTATE 25 SOUTH OF BUFFALO
TODAY THROUGH FRIDAY MORNING.

WYZ008-009-172330-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
1223 PM MST THU JAN 17 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST
FRIDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW IS EXPECTED TO INTENSIFY ACROSS THE BIG HORN MOUNTAINS THIS
AFTERNOON AND CONTINUE THROUGH FRIDAY MORNING BEFORE DECREASING.
TOTAL SNOW ACCUMULATIONS OF 8 TO 16 INCHES COMBINED WITH
SUSTAINED NORTH TO NORTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO
45 MPH AT PASS LEVEL WILL CREATE AREAS OF BLOWING AND DRIFTING SNOW...
ESPECIALLY TONIGHT. THE HEAVIEST SNOWFALL WILL OCCUR ACROSS THE
NORTH END OF THE BIG HORN MOUNTAINS...ESPECIALLY ON NORTH AND
NORTHWEST FACING SLOPES. TRAVELERS AND OTHER INTERESTED PARTIES
SHOULD STAY TUNED FOR THE LATEST STATEMENTS AND FORECASTS FROM THE
NATIONAL WEATHER SERVICE REGARDING THIS SIGNIFICANT WINTER STORM.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ010-172330-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...BUFFALO
1223 PM MST THU JAN 17 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST
FRIDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW IS EXPECTED TO INTENSIFY ACROSS NORTHERN JOHNSON COUNTY THIS
AFTERNOON AND CONTINUE INTO FRIDAY MORNING BEFORE DECREASING.
TOTAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES COMBINED WITH NORTH
WINDS OF 25 TO 35 MPH WITH GUSTS TO 50 MPH WILL CREATE AREAS OF
BLOWING AND DRIFTING SNOW...ESPECIALLY TONIGHT. THIS WINTER STORM 
WARNING INCLUDES THE CITY OF BUFFALO. TRAVELERS AND OTHER
INTERESTED PARTIES SHOULD STAY TUNED FOR THE LATEST STATEMENTS AND
FORECASTS FROM THE NATIONAL WEATHER SERVICE REGARDING THIS
SIGNIFICANT WINTER STORM. PLEASE CHECK THE LATEST ROAD CONDITIONS
IF YOU MUST TRAVEL LATER TODAY OR TONIGHT.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

TEAM RIVERTON

000 
WWUS45 KRIW 172128
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
228 PM MST THU JAN 17 2008

...A SIGNIFICANT WINTER STORM TO IMPACT THE BIG HORN MOUNTAINS
AND ADJACENT LOWER ELEVATIONS OF JOHNSON COUNTY THROUGH FRIDAY
MORNING...

.A DEVELOPING STORM SYSTEM WILL CONTINUE TO ORGANIZE THIS EVENING
AND BRING STEADY SNOWFALL...HEAVY AT TIMES...TO THE BIG HORN
MOUNTAINS AND LOWER ELEVATIONS OF JOHNSON COUNTY TONIGHT INTO FRIDAY
MORNING. THE COMBINATION OF SNOWFALL AND INCREASING NORTH WINDS TONIGHT
WILL CREATE A SIGNIFICANT WINTER STORM FOR THE BIG HORN MOUNTAINS
AND LOWER ELEVATIONS OF JOHNSON COUNTY IN AND NEAR BUFFALO...
INCLUDING INTERSTATE 90 EAST OF BUFFALO AND INTERSTATE 25 SOUTH OF
BUFFALO TODAY THROUGH FRIDAY MORNING. SNOWFALL AMOUNTS WILL
DECREASE ACROSS FAR SOUTHERN JOHNSON COUNTY.

WYZ008-009-181100-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
228 PM MST THU JAN 17 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST
FRIDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS THE BIG HORN MOUNTAINS 
THROUGH FRIDAY MORNING BEFORE DECREASING. TOTAL SNOW ACCUMULATIONS
OF 8 TO 16 INCHES...WITH LOCAL AMOUNTS NEAR 2 FEET. SNOWFALL
AMOUNTS AS OF 2 PM THIS AFTERNOON VARIED FROM ONLY AN INCH OR TWO
IN THE SOUTHERN PART OF THE BIG HORN RANGE WITH 4 TO 8 INCHES
ACROSS THE NORTHERN BIG HORN MOUNTAINS WITH LOCAL AMOUNTS UP TO 10
INCHES. THE SNOWFALL COMBINED WITH SUSTAINED NORTH TO NORTHWEST
WINDS OF 20 TO 30 MPH WITH GUSTS TO 45 MPH AT PASS LEVEL WILL
CREATE AREAS OF BLOWING AND DRIFTING SNOW...ESPECIALLY TONIGHT.
THE HEAVIEST SNOWFALL WILL OCCUR ACROSS THE NORTH END OF THE BIG
HORN MOUNTAINS... ESPECIALLY ON NORTH AND NORTHWEST FACING SLOPES.
TRAVELERS AND OTHER INTERESTED PARTIES SHOULD STAY TUNED FOR THE
LATEST STATEMENTS AND FORECASTS FROM THE NATIONAL WEATHER SERVICE
REGARDING THIS SIGNIFICANT WINTER STORM.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ010-181100-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...BUFFALO
228 PM MST THU JAN 17 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST
FRIDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS NORTHERN JOHNSON COUNTY
THROUGH FRIDAY MORNING BEFORE DECREASING. TOTAL SNOW ACCUMULATIONS OF 4
TO 8 INCHES WILL FALL BY NOON FRIDAY. NORTH WINDS OF 25 TO 35 MPH
WITH GUSTS TO 50 MPH WILL DEVELOP THIS EVENING AND CONTINUE
OVERNIGHT AS A STRONG COLD FRONT MOVES THROUGH THE AREA. CONSIDERABLE
BLOWING AND DRIFTING SNOW WILL LIKELY DEVELOP BEHIND THIS COLD
FRONT TONIGHT. THIS WINTER STORM WARNING INCLUDES THE CITY OF BUFFALO.
TRAVELERS AND OTHER INTERESTED PARTIES SHOULD STAY TUNED FOR THE
LATEST STATEMENTS AND FORECASTS FROM THE NATIONAL WEATHER SERVICE
REGARDING THIS SIGNIFICANT WINTER STORM. PLEASE CHECK THE LATEST
ROAD CONDITIONS IF YOU MUST TRAVEL TONIGHT OR FRIDAY.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ011-181100-
/O.NEW.KRIW.SN.Y.0005.080117T2128Z-080118T1900Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
228 PM MST THU JAN 17 2008

...SNOW ADVISORY IN EFFECT UNTIL 12 PM MST FRIDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A SNOW
ADVISORY...WHICH IS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW IS EXPECTED ACROSS SOUTHERN JOHNSON COUNTY...INCLUDING THE
KAYCEE AREA THROUGH FRIDAY MORNING WITH TOTAL SNOWFALL OF 3 TO 5
INCHES. NORTH WINDS WILL INCREASE TONIGHT TO 15 TO 25 MPH WITH
GUSTS UP TO 40 MPH CAUSING SOME BLOWING AND DRIFTING SNOW AND
REDUCED VISIBILITIES. USE CAUTION IF YOU MUST TRAVEL TONIGHT AND
PLEASE CHECK THE LATEST FORECAST AND ROAD CONDITIONS BEFORE
VENTURING OUT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

TEAM RIVERTON

000 
WWUS45 KRIW 180436
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
936 PM MST THU JAN 17 2008

...A SIGNIFICANT WINTER STORM TO IMPACT THE BIG HORN MOUNTAINS
AND ADJACENT LOWER ELEVATIONS OF JOHNSON COUNTY THROUGH FRIDAY
MORNING...

.THE FIRST OF TWO UPPER LEVEL DISTURBANCES THAT BROUGHT SEVERAL
INCHES OF SNOW TO NORTHEAST WYOMING AND THE BIG HORN MOUNTAINS
WILL MOVE INTO THE HIGH PLAINS OVERNIGHT. THIS WILL RESULT IN A
BRIEF LULL IN SNOWFALL LATE THIS EVENING THROUGH EARLY FRIDAY
MORNING. SNOW WILL PICK BACK UP AROUND 3 AM AS A SECOND CLIPPER
SYSTEM BEARS DOWN ON THE BIG HORN MOUNTAINS AND EASTERN JOHNSON
COUNTY. THIS SYSTEM WILL BRING WIDESPREAD SNOWFALL TO THE AREA
THROUGH FRIDAY MORNING WITH SNOW TAPERING OFF FRIDAY AFTERNOON.
WINDS WILL ALSO SUBSIDE OVERNIGHT BUT PICK BACK UP SHORTLY AFTER
SUNRISE FRIDAY MORNING. 

WYZ008-009-181245-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
936 PM MST THU JAN 17 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST
FRIDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS THE BIG HORN MOUNTAINS
THROUGH FRIDAY MORNING BEFORE DECREASING. AT 9 PM...4 TO 5 INCHES
HAD FALLEN OVER THE NORTHERN BIG HORN RANGE...NORTH OF HIGHWAY 16
OVER POWDER RIVER PASS.  TOTAL SNOW ACCUMULATIONS OF 8 TO 16
INCHES...WITH LOCAL AMOUNTS NEAR 2 FEET ARE EXPECTED BY FRIDAY
AFTERNOON. THE SNOWFALL COMBINED WITH SUSTAINED NORTH TO
NORTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO 45 MPH AT PASS LEVEL
WILL CREATE AREAS OF BLOWING AND DRIFTING SNOW... ESPECIALLY
TONIGHT. THE HEAVIEST SNOWFALL WILL OCCUR ACROSS THE NORTH END OF
THE BIG HORN MOUNTAINS... ESPECIALLY ON NORTH AND NORTHWEST FACING
SLOPES. TRAVELERS AND OTHER INTERESTED PARTIES SHOULD STAY TUNED
FOR THE LATEST STATEMENTS AND FORECASTS FROM THE NATIONAL WEATHER
SERVICE REGARDING THIS SIGNIFICANT WINTER STORM.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ010-181245-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...BUFFALO
936 PM MST THU JAN 17 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST
FRIDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW WILL TAPER OFF LATE THIS EVENING THROUGH AROUND 2 AM FRIDAY
MORNING BEFORE A SECOND ROUND OF SNOWFALL HITS THE AREA EARLY
FRIDAY MORNING.  SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS
NORTHERN JOHNSON COUNTY AFTER 2 AM...CONTINUING THROUGH FRIDAY
MORNING BEFORE DECREASING. AT 9 PM...2 TO 3 INCHES OF SNOW HAD
FALLEN IN THE BUFFALO AREA WITH NORTHWEST WIND OF 30 TO 40 MPH
CAUSING SIGNIFICANT BLOWING AND DRIFTING SNOW AND LIMITED
VISIBILITY. THESE WINDS WILL DECREASE TO 20 TO 30 MPH OVERNIGHT
BEFORE PICKING BACK UP SHORTLY AFTER SUNRISE FRIDAY MORNING. TOTAL SNOW
ACCUMULATIONS OF 4 TO 8 INCHES WILL FALL BY NOON FRIDAY. TRAVELERS
AND OTHER INTERESTED PARTIES SHOULD STAY TUNED FOR THE LATEST
STATEMENTS AND FORECASTS FROM THE NATIONAL WEATHER SERVICE
REGARDING THIS SIGNIFICANT WINTER STORM. PLEASE CHECK THE LATEST
ROAD CONDITIONS IF YOU MUST TRAVEL TONIGHT OR FRIDAY.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ011-181245-
/O.CON.KRIW.SN.Y.0005.000000T0000Z-080118T1900Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
936 PM MST THU JAN 17 2008

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW IS EXPECTED ACROSS SOUTHERN JOHNSON COUNTY...INCLUDING THE
KAYCEE AREA THROUGH FRIDAY MORNING WITH TOTAL SNOWFALL OF 3 TO
5 INCHES. NORTH WINDS WILL INCREASE TONIGHT TO 15 TO 25 MPH WITH
GUSTS UP TO 40 MPH CAUSING SOME BLOWING AND DRIFTING SNOW AND
REDUCED VISIBILITIES. USE CAUTION IF YOU MUST TRAVEL TONIGHT AND
PLEASE CHECK THE LATEST FORECAST AND ROAD CONDITIONS BEFORE
VENTURING OUT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

AEM

000 
WWUS45 KRIW 180654
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1154 PM MST THU JAN 17 2008

...A SIGNIFICANT WINTER STORM TO IMPACT THE BIG HORN MOUNTAINS
AND ADJACENT LOWER ELEVATIONS OF JOHNSON COUNTY THROUGH FRIDAY
MORNING...

.THE FIRST OF TWO UPPER LEVEL DISTURBANCES THAT BROUGHT SEVERAL
INCHES OF SNOW TO NORTHEAST WYOMING AND THE BIG HORN MOUNTAINS
WILL MOVE INTO THE HIGH PLAINS OVERNIGHT. THIS WILL RESULT IN A
BRIEF LULL IN SNOWFALL LATE THIS EVENING THROUGH EARLY FRIDAY
MORNING. SNOW WILL PICK BACK UP AROUND 3 AM AS A SECOND CLIPPER
SYSTEM BEARS DOWN ON THE BIG HORN MOUNTAINS AND EASTERN JOHNSON
COUNTY. THIS SYSTEM WILL BRING WIDESPREAD SNOWFALL TO THE AREA
THROUGH FRIDAY MORNING WITH SNOW TAPERING OFF FRIDAY AFTERNOON.
WINDS WILL ALSO SUBSIDE OVERNIGHT BUT PICK BACK UP SHORTLY AFTER
SUNRISE FRIDAY MORNING.

WYZ008-009-181500-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
1154 PM MST THU JAN 17 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST
FRIDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS THE BIG HORN MOUNTAINS
THROUGH FRIDAY MORNING BEFORE DECREASING. AT 9 PM...4 TO 5 INCHES
HAD FALLEN OVER THE NORTHERN BIG HORN RANGE...NORTH OF HIGHWAY
16 OVER POWDER RIVER PASS.  TOTAL SNOW ACCUMULATIONS OF 8 TO
16 INCHES...WITH LOCAL AMOUNTS NEAR 2 FEET ARE EXPECTED BY FRIDAY
AFTERNOON. THE SNOWFALL COMBINED WITH SUSTAINED NORTH TO
NORTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO 45 MPH AT PASS
LEVEL WILL CREATE AREAS OF BLOWING AND DRIFTING SNOW...
ESPECIALLY TONIGHT. THE HEAVIEST SNOWFALL WILL OCCUR ACROSS THE
NORTH END OF THE BIG HORN MOUNTAINS... ESPECIALLY ON NORTH AND
NORTHWEST FACING SLOPES. TRAVELERS AND OTHER INTERESTED PARTIES
SHOULD STAY TUNED FOR THE LATEST STATEMENTS AND FORECASTS FROM
THE NATIONAL WEATHER SERVICE REGARDING THIS SIGNIFICANT WINTER
STORM.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ010-181500-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...BUFFALO
1154 PM MST THU JAN 17 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST
FRIDAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW WILL TAPER OFF LATE THIS EVENING THROUGH AROUND 2 AM FRIDAY
MORNING BEFORE A SECOND ROUND OF SNOWFALL HITS THE AREA EARLY
FRIDAY MORNING.  SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS
NORTHERN JOHNSON COUNTY AFTER 2 AM...CONTINUING THROUGH FRIDAY
MORNING BEFORE DECREASING. AT 9 PM...2 TO 3 INCHES OF SNOW HAD
FALLEN IN THE BUFFALO AREA WITH NORTHWEST WIND OF 30 TO 40 MPH
CAUSING SIGNIFICANT BLOWING AND DRIFTING SNOW AND LIMITED
VISIBILITY. THESE WINDS WILL DECREASE TO 20 TO 30 MPH OVERNIGHT
BEFORE PICKING BACK UP SHORTLY AFTER SUNRISE FRIDAY MORNING.
TOTAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES WILL FALL BY NOON
FRIDAY. TRAVELERS AND OTHER INTERESTED PARTIES SHOULD STAY TUNED
FOR THE LATEST STATEMENTS AND FORECASTS FROM THE NATIONAL WEATHER
SERVICE REGARDING THIS SIGNIFICANT WINTER STORM. PLEASE CHECK THE
LATEST ROAD CONDITIONS IF YOU MUST TRAVEL TONIGHT OR FRIDAY.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ004-006-181500-
/O.EXA.KRIW.SN.Y.0005.000000T0000Z-080118T1900Z/
NORTH BIG HORN BASIN-SOUTHEAST BIG HORN BASIN-
INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN...
WORLAND
1154 PM MST THU JAN 17 2008

...SNOW ADVISORY IN EFFECT UNTIL 12 PM MST FRIDAY...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A SNOW
ADVISORY...WHICH IS IN EFFECT UNTIL 12 PM MST FRIDAY. 

LIGHT TO MODERATE SNOW WILL CONTINUE OVERNIGHT INTO FRIDAY
MORNING. 2 TO 4 INCHES OF SNOW HAD ALREADY FALLEN FROM FRANNIE
THROUGH GREYBULL LATE THIS EVENING WITH AN ADDITIONAL 1 TO 3
INCHES EXPECTED THROUGH FRIDAY MORNING. TOTAL SNOW ACCUMULATION
WILL RANGE FROM 3 TO 7 INCHES. NORTHWEST WIND AT 15 TO 25 MPH
WITH GUSTS TO 35 MPH WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW
AND LIMITED VISIBILITY AROUND THE POWELL AREA. USE CAUTION IF YOU
MUST TRAVEL TONIGHT AND PLEASE CHECK THE LATEST FORECAST AND ROAD
CONDITIONS BEFORE VENTURING OUT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ011-181500-
/O.CON.KRIW.SN.Y.0005.000000T0000Z-080118T1900Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
1154 PM MST THU JAN 17 2008

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 12 PM MST FRIDAY. 

SNOW IS EXPECTED ACROSS SOUTHERN JOHNSON COUNTY...INCLUDING THE
KAYCEE AREA THROUGH FRIDAY MORNING WITH TOTAL SNOWFALL OF 3 TO
5 INCHES. NORTH WINDS WILL INCREASE TONIGHT TO 15 TO 25 MPH WITH
GUSTS UP TO 40 MPH CAUSING SOME BLOWING AND DRIFTING SNOW AND
REDUCED VISIBILITIES. USE CAUTION IF YOU MUST TRAVEL TONIGHT AND
PLEASE CHECK THE LATEST FORECAST AND ROAD CONDITIONS BEFORE
VENTURING OUT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS45 KRIW 180912
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
212 AM MST FRI JAN 18 2008

...A SIGNIFICANT WINTER STORM WILL CONTINUE TO BRING SNOW TO THE
BIGHORN MOUNTAINS AND ADJACENT LOWER ELEVATIONS OF THE BIGHORN
BASIN AND JOHNSON COUNTY THROUGH THIS MORNING...

.THE SECOND UPPER LEVEL TROUGH WILL BRING WIDESPREAD SNOWFALL TO
THE AREA THROUGH THIS MORNING WITH SNOW TAPERING OFF DURING THE AFTERNOON.
STRONG NORTHWEST WINDS WILL CREATE AREAS OF BLOWING AND DRIFTING SNOW.

WYZ008-009-181900-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
212 AM MST FRI JAN 18 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY. 

SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS THE BIG HORN MOUNTAINS
THROUGH THIS MORNING BEFORE DECREASING. TOTAL SNOW ACCUMULATIONS
OF 8 TO 16 INCHES...WITH LOCAL AMOUNTS NEAR 2 FEET ARE EXPECTED BY
FRIDAY AFTERNOON. THE SNOWFALL COMBINED WITH SUSTAINED NORTH TO
NORTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO 45 MPH AT PASS LEVEL
WILL CREATE AREAS OF BLOWING AND DRIFTING SNOW. THE HEAVIEST
SNOWFALL WILL OCCUR ACROSS THE NORTHERN END OF THE BIG HORN
MOUNTAINS...ESPECIALLY ON NORTH AND NORTHWEST FACING SLOPES.
TRAVELERS AND OTHER INTERESTED PARTIES SHOULD STAY TUNED FOR THE
LATEST STATEMENTS AND FORECASTS FROM THE NATIONAL WEATHER SERVICE
REGARDING THIS SIGNIFICANT WINTER STORM.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ010-181900-
/O.CON.KRIW.WS.W.0002.000000T0000Z-080118T1900Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...BUFFALO
212 AM MST FRI JAN 18 2008

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY. 

SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS NORTHERN JOHNSON
COUNTY CONTINUING THROUGH THIS MORNING BEFORE GRADUALLY DECREASING
DURING THE AFTERNOON. NORTHWEST WIND OF 30 TO 40 MPH WILL CONTINUE
TO CAUSE SIGNIFICANT BLOWING AND DRIFTING SNOW AND LIMITED
VISIBILITY. TOTAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES WILL FALL
BY NOON TODAY. TRAVELERS AND OTHER INTERESTED PARTIES SHOULD STAY
TUNED FOR THE LATEST STATEMENTS AND FORECASTS FROM THE NATIONAL
WEATHER SERVICE REGARDING THIS SIGNIFICANT WINTER STORM. PLEASE
CHECK THE LATEST ROAD CONDITIONS IF YOU MUST TRAVEL THIS MORNING.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ004-006-181900-
/O.CON.KRIW.SN.Y.0005.000000T0000Z-080118T1900Z/
NORTH BIG HORN BASIN-SOUTHEAST BIG HORN BASIN-
INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN...
WORLAND
212 AM MST FRI JAN 18 2008

...SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY. 

LIGHT TO MODERATE SNOW WILL CONTINUE THIS MORNING. 2 TO 4 INCHES
OF SNOW HAD ALREADY FALLEN FROM FRANNIE THROUGH GREYBULL YESTERDAY
WITH AN ADDITIONAL 1 TO 3 INCHES EXPECTED THROUGH THIS MORNING.
TOTAL SNOW ACCUMULATION WILL RANGE FROM 3 TO 7 INCHES. NORTHWEST
WIND AT 15 TO 25 MPH WITH GUSTS TO 35 MPH WILL CAUSE AREAS OF BLOWING
AND DRIFTING SNOW AND LIMITED VISIBILITY AROUND THE POWELL AREA.
USE CAUTION IF YOU MUST TRAVEL THIS MORNING AND PLEASE CHECK THE
LATEST FORECAST AND ROAD CONDITIONS BEFORE VENTURING OUT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ011-181900-
/O.CON.KRIW.SN.Y.0005.000000T0000Z-080118T1900Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
212 AM MST FRI JAN 18 2008

...SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL NOON MST TODAY. 

SNOW IS EXPECTED ACROSS SOUTHERN JOHNSON COUNTY...INCLUDING THE
KAYCEE AREA THIS MORNING WITH TOTAL SNOWFALL OF 3 TO 5 INCHES.
NORTH WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 40 MPH WILL CAUSE SOME
BLOWING AND DRIFTING SNOW AND REDUCED VISIBILITY. USE CAUTION IF
YOU MUST TRAVEL THIS MORNING AND PLEASE CHECK THE LATEST FORECAST AND
ROAD CONDITIONS BEFORE VENTURING OUT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

000 
WWUS45 KRIW 181632
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
932 AM MST FRI JAN 18 2008

...A WINTER STORM WILL CONTINUE TO BRING SNOW TO THE BIGHORN
MOUNTAINS AND ADJACENT LOWER ELEVATIONS OF THE BIGHORN BASIN AND
JOHNSON COUNTY THROUGH 3 PM MST THIS AFTERNOON...

.AN UPPER LEVEL TROUGH WILL BRING WIDESPREAD SNOWFALL TO THE AREA
THROUGH 3 PM MST THIS AFTERNOON WITH SNOW TAPERING OFF AFTER 3 PM MST
THIS AFTERNOON. STRONG NORTHWEST WINDS WILL CREATE AREAS OF BLOWING
AND DRIFTING SNOW.

WYZ008-009-182200-
/O.EXT.KRIW.WS.W.0002.000000T0000Z-080118T2200Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
932 AM MST FRI JAN 18 2008

...WINTER STORM WARNING NOW IN EFFECT UNTIL 3 PM MST THIS
AFTERNOON...

THE WINTER STORM WARNING IS NOW IN EFFECT UNTIL 3 PM MST THIS
AFTERNOON. 

SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS THE BIG HORN MOUNTAINS
THROUGH 3 PM MST THIS AFTERNOON BEFORE DECREASING. TOTAL SNOW
ACCUMULATIONS OF 9 TO 16 INCHES...WITH LOCAL AMOUNTS NEAR 2 FEET
ARE EXPECTED BY FRIDAY AFTERNOON. THE SNOWFALL COMBINED WITH
SUSTAINED NORTH TO NORTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO
45 MPH AT PASS LEVEL WILL CREATE AREAS OF BLOWING AND DRIFTING
SNOW. 

THE HEAVIEST SNOWFALL WILL OCCUR ACROSS THE NORTHERN END OF
THE BIG HORN MOUNTAINS...ESPECIALLY ON NORTH AND NORTHWEST FACING
SLOPES. TRAVELERS AND OTHER INTERESTED PARTIES SHOULD STAY TUNED
FOR THE LATEST STATEMENTS AND FORECASTS FROM THE NATIONAL WEATHER
SERVICE REGARDING THIS SIGNIFICANT WINTER STORM.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ010-182200-
/O.EXT.KRIW.WS.W.0002.000000T0000Z-080118T2200Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...BUFFALO
932 AM MST FRI JAN 18 2008

...WINTER STORM WARNING NOW IN EFFECT UNTIL 3 PM MST THIS
AFTERNOON...

THE WINTER STORM WARNING IS NOW IN EFFECT UNTIL 3 PM MST THIS
AFTERNOON. 

SNOW...HEAVY AT TIMES...IS EXPECTED ACROSS NORTHERN JOHNSON
COUNTY CONTINUING THROUGH 3 PM MST THIS AFTERNOON BEFORE
GRADUALLY DECREASING DURING THE AFTERNOON. NORTHWEST WIND OF 30 TO
40 MPH WILL CONTINUE TO CAUSE SIGNIFICANT BLOWING AND DRIFTING
SNOW AND LIMITED VISIBILITY. TOTAL SNOW ACCUMULATIONS OF 4 TO 8
INCHES WILL FALL BY 3 PM MST TODAY.

TRAVELERS AND OTHER INTERESTED PARTIES SHOULD STAY TUNED FOR THE
LATEST STATEMENTS AND FORECASTS FROM THE NATIONAL WEATHER SERVICE
REGARDING THIS SIGNIFICANT WINTER STORM. PLEASE CHECK THE LATEST
ROAD CONDITIONS IF YOU MUST TRAVEL THIS MORNING.

REMEMBER...A WINTER STORM WARNING MEANS SEVERE WINTER WEATHER
CONDITIONS ARE IMMINENT OR HIGHLY LIKELY.

$$

WYZ004-006-182200-
/O.EXT.KRIW.SN.Y.0005.000000T0000Z-080118T2200Z/
NORTH BIG HORN BASIN-SOUTHEAST BIG HORN BASIN-
INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN...
WORLAND
932 AM MST FRI JAN 18 2008

...SNOW ADVISORY NOW IN EFFECT UNTIL 3 PM MST THIS AFTERNOON...

THE SNOW ADVISORY IS NOW IN EFFECT UNTIL 3 PM MST THIS AFTERNOON.

LIGHT TO MODERATE SNOW WILL CONTINUE UNTIL 3 PM MST THIS
AFTERNOON. 2 TO 4 INCHES OF SNOW HAD ALREADY FALLEN FROM FRANNIE
THROUGH GREYBULL YESTERDAY WITH AN ADDITIONAL 2 TO 5 INCHES
EXPECTED THROUGH UNTIL 3 PM MST THIS AFTERNOON. TOTAL SNOW
ACCUMULATION WILL RANGE FROM 3 TO 7 INCHES. 

NORTHWEST WIND AT 15 TO 25 MPH WITH GUSTS TO 35 MPH WILL CAUSE
AREAS OF BLOWING AND DRIFTING SNOW AND LIMITED VISIBILITY AROUND
THE POWELL AREA. USE CAUTION IF YOU MUST TRAVEL THIS MORNING AND
PLEASE CHECK THE LATEST FORECAST AND ROAD CONDITIONS BEFORE
VENTURING OUT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

WYZ011-182200-
/O.EXT.KRIW.SN.Y.0005.000000T0000Z-080118T2200Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
932 AM MST FRI JAN 18 2008

...SNOW ADVISORY NOW IN EFFECT UNTIL 3 PM MST THIS AFTERNOON...

THE SNOW ADVISORY IS NOW IN EFFECT UNTIL 3 PM MST THIS AFTERNOON.

SNOW IS EXPECTED ACROSS SOUTHERN JOHNSON COUNTY...INCLUDING THE
KAYCEE AREA UNTIL 3 PM MST THIS AFTERNOON WITH TOTAL SNOWFALL OF 3
TO 6 INCHES. NORTH WINDS OF 15 TO 25 MPH WITH GUSTS UP TO 40 MPH
WILL CAUSE SOME BLOWING AND DRIFTING SNOW AND REDUCED VISIBILITY.
USE CAUTION IF YOU MUST TRAVEL THIS MORNING AND PLEASE CHECK THE
LATEST FORECAST AND ROAD CONDITIONS BEFORE VENTURING OUT.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

C.BAKER

000 
WWUS45 KRIW 182145
WSWRIW

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
245 PM MST FRI JAN 18 2008

...WINTER STORM WARNING WILL EXPIRE AT 3 PM MST THIS AFTERNOON...

.THE WINTER STORM THAT BROUGHT SNOW AND WIND TO NORTH CENTRAL 
WYOMING OVER NIGHT AND TODAY HAS MOVED SOUTHEAST AWAY FROM THE
BIGHORN MOUNTAINS. THE SNOWFALL OVER THE AREA WILL CONTINUE TO
DECREASE WITH LITTLE ADDITONAL ACCUMULATION EXPECTED.  

WYZ008-009-182245-
/O.EXP.KRIW.WS.W.0002.000000T0000Z-080118T2200Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
245 PM MST FRI JAN 18 2008

...WINTER STORM WARNING WILL EXPIRE AT 3 PM MST THIS AFTERNOON...

THE WINTER STORM WARNING WILL EXPIRE AT 3 PM MST THIS AFTERNOON. 

THE WINTER STORM THAT BROUGHT SNOW AND WIND TO NORTH CENTRAL 
WYOMING OVER NIGHT AND TODAY HAS MOVED SOUTHEAST AWAY FROM THE
BIGHORN MOUNTAINS. THE SNOWFALL OVER THE AREA WILL CONTINUE TO
DECREASE WITH LITTLE ADDITONAL ACCUMULATION EXPECTED. 

$$

WYZ010-182245-
/O.EXP.KRIW.WS.W.0002.000000T0000Z-080118T2200Z/
NORTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...BUFFALO
245 PM MST FRI JAN 18 2008

...WINTER STORM WARNING WILL EXPIRE AT 3 PM MST THIS AFTERNOON...

THE WINTER STORM WARNING WILL EXPIRE AT 3 PM MST THIS AFTERNOON. 

THE WINTER STORM THAT BROUGHT SNOW AND WIND TO NORTH CENTRAL 
WYOMING OVER NIGHT AND TODAY HAS MOVED SOUTHEAST AWAY FROM THE
BIGHORN MOUNTAINS. THE SNOWFALL OVER THE AREA WILL CONTINUE TO
DECREASE WITH LITTLE ADDITONAL ACCUMULATION EXPECTED. 

$$

WYZ004-006-182245-
/O.EXP.KRIW.SN.Y.0005.000000T0000Z-080118T2200Z/
NORTH BIG HORN BASIN-SOUTHEAST BIG HORN BASIN-
INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN...
WORLAND
245 PM MST FRI JAN 18 2008

...SNOW ADVISORY WILL EXPIRE AT 3 PM MST THIS AFTERNOON...

THE SNOW ADVISORY WILL EXPIRE AT 3 PM MST THIS AFTERNOON. 

THE WINTER STORM THAT BROUGHT SNOW AND WIND TO NORTH CENTRAL 
WYOMING OVER NIGHT AND TODAY HAS MOVED SOUTHEAST AWAY FROM THE
BIGHORN MOUNTAINS. THE SNOWFALL OVER THE AREA WILL CONTINUE TO
DECREASE WITH LITTLE ADDITONAL ACCUMULATION EXPECTED. 

$$

WYZ011-182245-
/O.EXP.KRIW.SN.Y.0005.000000T0000Z-080118T2200Z/
SOUTHEAST JOHNSON COUNTY-
INCLUDING THE CITY OF...KAYCEE
245 PM MST FRI JAN 18 2008

...SNOW ADVISORY WILL EXPIRE AT 3 PM MST THIS AFTERNOON...

THE SNOW ADVISORY WILL EXPIRE AT 3 PM MST THIS AFTERNOON. 

THE WINTER STORM THAT BROUGHT SNOW AND WIND TO NORTH CENTRAL 
WYOMING OVER NIGHT AND TODAY HAS MOVED SOUTHEAST AWAY FROM THE
BIGHORN MOUNTAINS. THE SNOWFALL OVER THE AREA WILL CONTINUE TO
DECREASE WITH LITTLE ADDITONAL ACCUMULATION EXPECTED. 

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
348 PM MST WED JAN 16 2008

SHORT TERM...TONIGHT THROUGH SATURDAY
SHORTWAVE SPILLING OVER THE RIDGE INTO SW CANADA WILL BE A MAJOR
CONCERN AS IT HEADS INTO NRN WYOMING THURSDAY MORNING. COMBINATION
OF INITIAL ISENTROPIC LIFT FOLLOWED BY QG FORCING...FRONTAL
FORCING...STEEPENING LAPSE RATES AND GOOD OROGRAPHICS ALL ADD UP
TO A POTENTIALLY MAJOR WINTER STORM FOR THE BIG HORN MOUNTAINS AND
ADJACENT AREAS OF NRN JOHNSON COUNTY. PATTERN IS VERY FAVORABLE
FOR THE NRN PORTION OF THE BIG HORN MOUNTAINS. NOT ONLY DOES THIS
STORM HAVE THE POTENTIAL TO BE A SIGNIFICANT ONE BUT THE DURATION
IS HARD TO DEFINE AS SNOW MAY CONTINUE INTO THE WEEKEND. WILL
FOCUS ON THE MAIN TIMEFRAME OF THE BEST DYNAMICS FOR THIS FIRST
SYSTEM AND SEE HOW THE NEXT SYSTEM LOOKS TOMORROW. THE FORECAST
FOR CASPER AND THE ADJACENT AREA IS ALSO INTERESTING AS STRONG
SOUTHWEST FLOW TURNS MORE WESTERLY LATE THURSDAY AND THEN THE
ATMOSPHERE MOISTENS IN AN ISENTROPIC FLOW PATTERN. HARD TO SEE
MUCH HAPPENING SOUTH OF JOHNSON COUNTY IN THIS PATTERN BUT CANT
RULE OUT SOME SNOW SHOWERS MOVING OFF THE BIG HORNS OR PERHAPS
SURVIVING IN THE FLOW OUT OF LOWER ELEVATIONS OF JOHNSON COUNTY.
LIGHTER SNOWS ARE EXPECTED OUT WEST AT TIMES INTO FRIDAY.

TEMPERATURES WILL BE VERY CHALLENGING WITH INCREASING CLOUD COVER
TONIGHT IN THE NORTH...STEEP VALLEY INVERSIONS BUT WITH SOME
AREAS SEEING ENOUGH PRESSURE GRADIENT TO BEGIN BLOWING. THIS SAME
ISSUE WILL BE AROUND FRIDAY NIGHT WITH POTENTIALLY MORE AREAS
SEEING SOME NOCTURNAL WIND AND CONTINUED CLOUD COVER TO HELP THE
OVERNIGHT LOWS HOLD UP EVEN MORE.

ON SATURDAY...THE FLOW BEGINS TO BACK IN ADVANCE OF THE NEW STORM
SYSTEM WITH SNOW QUITE POSSIBLY INCREASING AND BECOMING MORE
WIDESPREAD IN THE WEST AND ALSO AFFECTING THE BIG HORN MOUNTAINS
AGAIN. THIS APPEARS TO BE JUST THE BEGINNING OF ANOTHER MAJOR
CHANGE TO AFFECT MUCH OF THE AREA OVER THE WEEKEND.

LONG TERM...SATURDAY NIGHT THROUGH TUESDAY
A STORM SYSTEM CURRENTLY OVER THE WESTERN PACIFIC NEAR 160E AND
45N WILL MOVE EAST ACROSS THE PACIFIC...AND THEN OVER THE RIDGE ACROSS
THE EASTERN PACIFIC IN THE SHORT TERM...BEFORE DIVING SOUTHEAST ON
THE BACKSIDE OF THE RIDGE ARRIVING IN THE PACIFIC
NORTHWEST/INTERMOUNTAIN WEST ON SATURDAY. BOTH THE 00Z GFS AND
ECMWF HAVE SPED UP THIS SYSTEM BY 6 TO 12 HOURS...WITH ECMWF STILL
CONSISTENTLY BEING A TAD SLOWER THAN THE GFS. AS THE TROUGH DIGS
INTO THE PACIFIC NORTHWEST...MID LEVEL FLOW IS EXPECTED TO
BACK...WHICH SHOULD SET UP DECENT WESTERLY FLOW AND ISENTROPIC
UPGLIDE SATURDAY/SATURDAY NIGHT ACROSS WESTERN WYOMING. THE
ASSOCIATED STRONG COLD FRONT IS EXPECTED TO MOVE THROUGH THE AREA
LATE SATURDAY NIGHT AND SUNDAY...SETTING UP THE POTENTIAL FOR SOME
UPSLOPE CONDITIONS EAST OF THE DIVIDE...DESPITE THE BEST DYNAMICS
WITH THIS SYSTEM REMAINING WEST OF THE AREA...AS MAIN TROUGH SPLITS
THE FORECAST AREA. THE SURFACE GRADIENT ON SUNDAY PROJECTED BY MEDIUM
RANGE MODELS IS BETWEEN 20 AND 25MB ACROSS THE STATE...AS A 1045
MB HIGH SAGS SOUTH OUT OF CANADA. HAVE INCREASED THE NORTHERLY TO
EASTERLY WINDS...BUT PROBABLY NOT ENOUGH WITH THAT TIGHT OF A
GRADIENT. SUNDAY NIGHT/MONDAY...THE NORTHERN PART OF THE TROUGH
SHIFTS EAST OF THE AREA...WHILE THE WESTERN PART OF THE TROUGH
BECOMES CUT OFF ACROSS NORTHERN CALIFORNIA WITH A POSSIBLE SHEAR
AXIS ACROSS THE COWBOY STATE. HAVE GRADUALLY DECREASED POPS FOR
SUNDAY NIGHT/MONDAY TIMEFRAME...BUT HESITANT WITH SHEAR AXIS AND
SLOW MOVEMENT OF THE WHOLE STORM SYSTEM. WILL HAVE MAINLY DRY
CONDITIONS MONDAY NIGHT THROUGH TUESDAY NIGHT...BUT HAVE SOME POPS
WEDNESDAY...MAINLY SOUTH AND OVER HIGHER TERRAIN AS THE CUT OFF
LOW OVER CALIFORNIA IS PROJECTED TO EJECT EAST INTO THE FOUR CORNERS AREA.

THIS WILL COME AS A SURPRISE...BUT TEMPERATURES FOR MOST AREAS
WILL REMAIN BELOW AVERAGE IN THE EXTENDED...ESPECIALLY SUNDAY AND
MONDAY...BEHIND THE STRONG COLD FRONT LATE SATURDAY NIGHT/SUNDAY.
TEMPERATURES SUNDAY AND MONDAY...ARE PROBABLY OPTIMISTICALLY TOO
WARM...AND LATER SHIFTS WILL PROBABLY NEED TO CONTINUE THE
LOWERING TREND.

AVIATION...
HIGH PRESSURE WILL MOVE FROM CENTRAL IDAHO INTO WESTERN WYOMING
TONIGHT...AS LOW PRESSURE DROPS SOUTHWARD FROM ALBERTA INTO EASTERN
MONTANA. HIGH CLOUDS AHEAD OF THE LOW PRESSURE SYSTEM TO THE NORTH
WILL MOVE ACROSS THE REGION TONIGHT...AND VFR CONDITIONS ARE
EXPECTED AT ALL TAF SITES TONIGHT. AS THE PRESSURE GRADIENT
INCREASES TONIGHT...SOUTHWEST TO WEST WINDS WILL INCREASE TO 12 TO
16 KT AT KCPR...KCOD AND KRKS WITH WINDS REMAINING AT 11 KT OR LESS
AT THE REMAINING SITES. STRONG PRESSURE GRADIENT THURSDAY WILL
PRODUCE WIND GUSTS FROM 25 TO 35 KT AT ALL TAF SITES...EXCEPT
KRIW...KLND AND KWRL. CEILINGS WILL LOWER THURSDAY AS LOW PRESSURE
MOVES THROUGH NORTHEASTERN WYOMING...BUT VFR CONDITIONS WILL
CONTINUE...EXCEPT AT WRL WHERE MVFR CEILINGS AND VICINITY SNOW
SHOWERS ARE EXPECTED AFTER 21Z.

FIRE WEATHER...
ANOTHER POTENTIAL WINTER STORM WILL IMPACT THE BIG HORN MOUNTAINS
AND LOWER ELEVATIONS OF JOHNSON COUNTY THURSDAY INTO FRIDAY WITH
LIGHTER SNOWS AT TIMES IN THE REST OF THE MOUNTAINS. STRONG NORTH
WINDS WILL BE NOTED WITH THE STORM SYSTEM WITH GUSTY WEST TO
SOUTHWEST WINDS FROM NORTHEAST OF ROCK SPRINGS TO CASPER...THE
CODY FOOTHILLS AND IN SOME OTHER MOUNTAIN LOCATIONS. INVERSION
WILL HOLD IN SOME OF THE WESTERN VALLEYS THE NEXT 2 DAYS WITH THE
CENTRAL BASINS EXPERIENCING SOME BREAKING OF THE INVERSION AS A
STRONG PRESSURE GRADIENT ALLOWS THE NORTHWEST ALOFT TO MIX DOWN.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
WINTER STORM WATCH FROM THURSDAY MORNING THROUGH FRIDAY MORNING
FOR WYZ008-009.

WINTER STORM WATCH FROM THURSDAY AFTERNOON THROUGH FRIDAY
MORNING FOR WYZ010.

&&

SHORT TERM...SKRBAC
LONG TERM...WM
AVIATION...SMITH
FIRE WEATHER...SKRBAC

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
323 PM MST WED JAN 16 2008

WYZ001>020-022>030-171200-
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-
323 PM MST WED JAN 16 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

...WINTER STORM WATCH FOR THE BIG HORN MOUNTAINS FROM 8 AM THURSDAY
THROUGH NOON FRIDAY...

...WINTER STORM WATCH FOR THE BUFFALO AREA FROM NOON THURSDAY
THROUGH NOON FRIDAY...

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A SIGNIFICANT WINTER STORM MAY IMPACT THE BIG HORN MOUNTAINS AND
BUFFALO AREA THURSDAY INTO FRIDAY. A DEVELOPING STORM SYSTEM OVER
SOUTHERN CANADA IS EXPECTED TO MOVE INTO FAR NORTHERN WYOMING
THURSDAY MORNING SPREADING SNOW AND STRONG NORTH WIND. SNOWFALL
AMOUNTS OF 8 TO 16 INCHES ARE POSSIBLE IN THE BIG HORN MOUNTAINS...
ESPECIALLY FROM AROUND POWDER RIVER PASS NORTHWARD. SNOWFALL
AMOUNTS OF 4 TO 8 INCHES ARE POSSIBLE AROUND BUFFALO AND THE
ADJACENT INTERSTATE 90 EAST OF BUFFALO AND INTERSTATE 25 SOUTH OF
BUFFALO. THE SNOW WILL BE ACCOMPANIED BY STRONG NORTH WINDS OF 20 TO
30 MPH WITH GUSTS TO 45 MPH CAUSING AREAS OF BLOWING AND DRIFTING
SNOW AND SHARPLY REDUCED VISIBILITIES. TRAVELLERS AND OTHER
INTERESTED PARTIES SHOULD STAY ABREAST OF THE LATEST DEVELOPMENTS ON
THIS POTENTIAL WINTER STORM.

THERE IS A POTENTIAL FOR ANOTHER STRONG STORM SYSTEM TO AFFECT
WESTERN AND CENTRAL WYOMING THIS WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT NEEDED TODAY OR TONIGHT.

TEAM RIVERTON