Flash Flood Watch 4, NWS Cheyenne, WY

216 
WGUS65 KCYS 191116
FFACYS

FLOOD WATCH
NATIONAL WEATHER SERVICE CHEYENNE WY
516 AM MDT SUN JUN 19 2011

...HEAVY RAINFALL EXPECTED ACROSS THE PANHANDLE THIS AFTERNOON
THROUGH MONDAY MORNING...

.A SLOW MOVING STORM SYSTEM WILL MOVE ACROSS THE CENTRAL ROCKIES
TODAY AND MONDAY. SHOWERS AND THUNDERSTORMS WILL OCCUR ACROSS THE
AREA TODAY AND TONIGHT. THESE THUNDERSTORMS ARE EXPECTED TO PRODUCE
VERY HEAVY RAINFALL. RAINFALL AMOUNTS WILL BE FROM 2 TO 3 INCHES
IN SOME AREAS.

NEZ002-003-019>021-054-055-095-096-192230-
/O.CON.KCYS.FF.A.0004.110619T1800Z-110620T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-
INCLUDING THE CITIES OF...CHADRON...ALLIANCE...SCOTTSBLUFF...
GERING...HARRISBURG...BRIDGEPORT...BAYARD...KIMBALL...SIDNEY...
HARRISON...AGATE
516 AM MDT SUN JUN 19 2011

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM NOON MDT TODAY
THROUGH LATE TONIGHT...

THE FLASH FLOOD WATCH CONTINUES FOR

* A PORTION OF WESTERN NEBRASKA...INCLUDING THE FOLLOWING 
  AREAS...BANNER...BOX BUTTE...CHEYENNE...DAWES...KIMBALL... 
  MORRILL...NORTH SIOUX...SCOTTS BLUFF AND SOUTH SIOUX. 

* FROM NOON MDT TODAY THROUGH LATE TONIGHT

* MODERATE TO SEVERE THUNDERSTORMS ARE ANTICIPATED THIS AFTERNOON
  THROUGH THIS EVENING. THESE THUNDERSTORMS ARE EXPECTED TO PRODUCE VERY
  HEAVY RAINFALL WITH SEVERAL INCHES OF RAIN ACCUMULATIONS
  POSSIBLE.

* THIS AMOUNT OF RAINFALL FALLING ON ALREADY WET SOILS FROM
  PREVIOUS HEAVY RAIN EVENTS THE PAST FEW DAYS COULD LEAD TO
  SIGNIFICANT FLASH FLOODING THIS AFTERNOON THROUGH MONDAY MORNING.
  RUNOFF WILL EXACERBATE RIVER FLOODING AS WELL IN THE PANHANDLE
  AT MITCHELL...MINATARE AND HENRY AS WELL AS SCOTTSBLUFF AND
  BRIDGEPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

&&

$$

WYZ110-192230-
/O.CON.KCYS.FA.A.0009.110619T1800Z-110621T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTH SNOWY RANGE FOOTHILLS-
INCLUDING THE CITIES OF...ARLINGTON...ELK MOUNTAIN
516 AM MDT SUN JUN 19 2011

...FLOOD WATCH REMAINS IN EFFECT FROM NOON MDT TODAY THROUGH
MONDAY EVENING...

THE FLOOD WATCH CONTINUES FOR

* A PORTION OF SOUTH CENTRAL WYOMING...INCLUDING THE FOLLOWING 
  AREA...NORTH SNOWY RANGE FOOTHILLS. 

* FROM NOON MDT TODAY THROUGH MONDAY EVENING

* CONTINUING SNOW MELT ALONG WITH A TWO DAY PERIOD OF RAIN WILL 
  CAUSE WATER LEVELS TO RISE ON THE MEDICINE BOW RIVER AND ROCK 
  CREEK. UP TO THREE QUARTERS OF AN INCH OF RAINFALL MAY CAUSE 
  THOSE RIVERS TO GO ABOVE FLOOD STAGE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.

YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.

&&

$$
KMD

696 
WGUS65 KCYS 200039
FFACYS

FLOOD WATCH
NATIONAL WEATHER SERVICE CHEYENNE WY
639 PM MDT SUN JUN 19 2011

...HEAVY RAINFALL EXPECTED ACROSS THE PANHANDLE THROUGH MONDAY
MORNING...

.A SLOW MOVING STORM SYSTEM WILL MOVE ACROSS THE CENTRAL ROCKIES
TONIGHT AND MONDAY. SHOWERS AND THUNDERSTORMS WILL OCCUR ACROSS
THE AREA TODAY AND TONIGHT. THESE THUNDERSTORMS ARE EXPECTED TO
PRODUCE VERY HEAVY RAINFALL. 

NEZ002-003-019>021-054-055-095-096-201200-
/O.CON.KCYS.FF.A.0004.000000T0000Z-110620T1200Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-
INCLUDING THE CITIES OF...CHADRON...ALLIANCE...SCOTTSBLUFF...
GERING...HARRISBURG...BRIDGEPORT...BAYARD...KIMBALL...SIDNEY...
HARRISON...AGATE
639 PM MDT SUN JUN 19 2011

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY...

THE FLASH FLOOD WATCH CONTINUES FOR

* A PORTION OF WESTERN NEBRASKA...INCLUDING THE FOLLOWING 
  AREAS...BANNER...BOX BUTTE...CHEYENNE...DAWES...KIMBALL... 
  MORRILL...NORTH SIOUX...SCOTTS BLUFF AND SOUTH SIOUX. 

* UNTIL 6 AM MDT MONDAY

* MODERATE THUNDERSTORMS ARE ANTICIPATED THIS EVENING. THESE
  THUNDERSTORMS ARE EXPECTED TO PRODUCE VERY HEAVY RAINFALL WITH
  SEVERAL INCHES OF RAIN ACCUMULATIONS POSSIBLE.

* THIS AMOUNT OF RAINFALL FALLING ON ALREADY WET SOILS FROM 
  PREVIOUS HEAVY RAIN EVENTS THE PAST FEW DAYS COULD LEAD TO 
  SIGNIFICANT FLASH FLOODING THIS AFTERNOON THROUGH MONDAY 
  MORNING. RUNOFF WILL EXACERBATE RIVER FLOODING AS WELL IN THE 
  PANHANDLE AT MITCHELL...MINATARE AND HENRY AS WELL AS 
  SCOTTSBLUFF AND BRIDGEPORT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

&&

$$

WYZ110-201245-
/O.CON.KCYS.FA.A.0009.000000T0000Z-110621T0600Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTH SNOWY RANGE FOOTHILLS-
INCLUDING THE CITIES OF...ARLINGTON...ELK MOUNTAIN
639 PM MDT SUN JUN 19 2011

...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY EVENING...

THE FLOOD WATCH CONTINUES FOR

* A PORTION OF SOUTH CENTRAL WYOMING...INCLUDING THE FOLLOWING 
  AREA...NORTH SNOWY RANGE FOOTHILLS. 

* THROUGH MONDAY EVENING

* CONTINUING SNOW MELT ALONG WITH A TWO DAY PERIOD OF RAIN WILL 
  CAUSE WATER LEVELS TO RISE ON THE MEDICINE BOW RIVER AND ROCK 
  CREEK. UP TO THREE QUARTERS OF AN INCH OF RAINFALL MAY CAUSE 
  THOSE RIVERS TO GO ABOVE FLOOD STAGE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.

YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.

&&

$$

263 
WGUS65 KCYS 200949
FFACYS

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE CHEYENNE WY
349 AM MDT MON JUN 20 2011

...HEAVY RAINFALL EXPECTED ACROSS THE SOUTHERN NEBRASKA PANHANDLE 
THROUGH MONDAY AFTERNOON...

.A SLOW MOVING STORM SYSTEM WILL MOVE FROM COLORADO INTO THE
CENTRAL PLAINS TODAY. SHOWERS AND THUNDERSTORMS WILL OCCUR ACROSS
THE AREA DURING THE DAY TODAY. THESE THUNDERSTORMS ARE EXPECTED
TO PRODUCE VERY HEAVY RAINFALL.

NEZ002-003-095-096-201100-
/O.CAN.KCYS.FF.A.0004.000000T0000Z-110620T1200Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAWES-BOX BUTTE-NORTH SIOUX-SOUTH SIOUX-
INCLUDING THE CITIES OF...CHADRON...ALLIANCE...HARRISON...AGATE
349 AM MDT MON JUN 20 2011

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR THE NORTHERN NEBRASKA PANHANDLE HAS
BEEN CANCELLED. RAINFALL AMOUNTS ON SUNDAY AVERAGED AROUND ONE
HALF OF AN INCH. ALTHOUGH ADDITIONAL RAINFALL AMOUNTS OF ONE
QUARTER TO THREE QUARTERS OF AN INCH ARE EXPECTED TODAY...THE
THREAT OF SIGNIFICANT FLASH FLOODING HAS ENDED.

$$

NEZ019>021-054-055-202200-
/O.EXT.KCYS.FF.A.0004.000000T0000Z-110621T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
INCLUDING THE CITIES OF...SCOTTSBLUFF...GERING...HARRISBURG...
BRIDGEPORT...BAYARD...KIMBALL...SIDNEY
349 AM MDT MON JUN 20 2011

...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THIS AFTERNOON...

THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR

* A PORTION OF WESTERN NEBRASKA...INCLUDING THE FOLLOWING 
  AREAS...BANNER...CHEYENNE...KIMBALL...MORRILL AND SCOTTS 
  BLUFF. 

* THROUGH THIS AFTERNOON

* ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY.
  THESE THUNDERSTORMS ARE EXPECTED TO PRODUCE HEAVY RAINFALL WITH
  UP TO ANOTHER INCH OF RAIN ACCUMULATION POSSIBLE.

* ADDITIONAL RAINFALL ON THE SATURATED GROUND FROM SUNDAYS VERY
  HEAVY RAINFALL...COULD LEAD TO MORE FLASH FLOODING THROUGH THE
  DAY TODAY. ADDITIONAL RUNOFF WOULD EXACERBATE RIVER FLOODING AS
  WELL IN THE PANHANDLE AT MITCHELL...MINATARE AND HENRY AS WELL
  AS SCOTTSBLUFF AND BRIDGEPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

&&

$$

WYZ110-202200-
/O.CON.KCYS.FA.A.0009.000000T0000Z-110621T0600Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTH SNOWY RANGE FOOTHILLS-
INCLUDING THE CITIES OF...ARLINGTON...ELK MOUNTAIN
349 AM MDT MON JUN 20 2011

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING...

THE FLOOD WATCH CONTINUES FOR

* A PORTION OF SOUTH CENTRAL WYOMING...INCLUDING THE FOLLOWING 
  AREA...NORTH SNOWY RANGE FOOTHILLS. 

* THROUGH THIS EVENING

* CONTINUING SNOW MELT ALONG WITH ADDITIONAL RAIN WILL CAUSE
  WATER LEVELS TO RISE ON THE MEDICINE BOW RIVER AND ROCK CREEK.
  UP TO THREE QUARTERS OF AN INCH OF RAINFALL MAY CAUSE THOSE
  RIVERS TO GO ABOVE FLOOD STAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.

YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.

&&

$$

HAHN

386 
WGUS65 KCYS 201722
FFACYS

FLOOD WATCH
NATIONAL WEATHER SERVICE CHEYENNE WY
1122 AM MDT MON JUN 20 2011

...HEAVY RAINFALL EXPECTED ACROSS THE SOUTHERN NEBRASKA PANHANDLE
THROUGH MONDAY AFTERNOON...

.A SLOW MOVING STORM SYSTEM WILL MOVE FROM COLORADO INTO THE
CENTRAL PLAINS TODAY. SHOWERS AND THUNDERSTORMS WILL OCCUR ACROSS
THE AREA DURING THE DAY TODAY. THESE THUNDERSTORMS ARE EXPECTED
TO PRODUCE VERY HEAVY RAINFALL.

WYZ110-201830-
/O.CAN.KCYS.FA.A.0009.000000T0000Z-110621T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NORTH SNOWY RANGE FOOTHILLS-
INCLUDING THE CITIES OF...ARLINGTON...ELK MOUNTAIN
1122 AM MDT MON JUN 20 2011

...FLOOD WATCH IS CANCELLED...

THE FLOOD WATCH FOR A PORTION OF SOUTH CENTRAL WYOMING HAS BEEN
CANCELLED. WATER LEVELS ON THE MEDICINE BOW RIVER AND ROCK CREEK 
HAVE NOT INCREASED SIGNIFICANTLY SINCE SUNDAY. ONLY MINOR RISES
ARE EXPECTED ON THOSE RIVERS THROUGH TONIGHT.  

$$

NEZ019>021-054-055-210000-
/O.CON.KCYS.FF.A.0004.000000T0000Z-110621T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
INCLUDING THE CITIES OF...SCOTTSBLUFF...GERING...HARRISBURG...
BRIDGEPORT...BAYARD...KIMBALL...SIDNEY
1122 AM MDT MON JUN 20 2011

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* A PORTION OF WESTERN NEBRASKA...INCLUDING THE FOLLOWING 
  AREAS...BANNER...CHEYENNE...KIMBALL...MORRILL AND SCOTTS 
  BLUFF. 

* UNTIL 6 PM MDT THIS EVENING

* ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY. 
  THESE THUNDERSTORMS ARE EXPECTED TO PRODUCE HEAVY RAINFALL 
  WITH UP TO ANOTHER INCH OF RAIN ACCUMULATION POSSIBLE. 

* ADDITIONAL RAINFALL ON THE SATURATED GROUND FROM SUNDAYS VERY 
  HEAVY RAINFALL...COULD LEAD TO MORE FLASH FLOODING THROUGH THE 
  DAY TODAY. ADDITIONAL RUNOFF WOULD EXACERBATE RIVER FLOODING 
  AS WELL IN THE PANHANDLE AT MITCHELL...MINATARE AND HENRY AS 
  WELL AS SCOTTSBLUFF AND BRIDGEPORT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

&&

$$

WEILAND

925 
WGUS65 KCYS 202100
FFACYS

FLOOD WATCH
NATIONAL WEATHER SERVICE CHEYENNE WY
300 PM MDT MON JUN 20 2011

NEZ019>021-054-055-202200-
/O.CAN.KCYS.FF.A.0004.000000T0000Z-110621T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
INCLUDING THE CITIES OF...SCOTTSBLUFF...GERING...HARRISBURG...
BRIDGEPORT...BAYARD...KIMBALL...SIDNEY
300 PM MDT MON JUN 20 2011

...FLASH FLOOD WATCH IS CANCELLED...

THE FLASH FLOOD WATCH FOR THE SOUTHWEST NEBRASKA PANHANDLE HAS
BEEN CANCELLED.

THE HEAVY RAIN THREAT...WHICH PRODUCED UP TO 4 INCHES OF RAINFALL
ACROSS PORTIONS OF THE AREA YESTERDAY HAS MOVED EAST OF THE REGION
THIS AFTERNOON. ALTHOUGH SCATTERED TO NUMEROUS RAIN SHOWERS AND A
BRIEF THUNDERSTORM ARE EXPECTED THIS EVENING AND TONIGHT...RAINFALL
RATES ARE EXPECTED TO BE RELATIVELY LOW.

HOWEVER...THE AREAL FLOOD WARNING FOR CHEYENNE COUNTY WILL
CONTINUE THROUGH EARLY TUESDAY MORNING WITH FLOODING STILL BE
REPORTED IN THAT AREA TODAY DUE TO THE VERY HEAVY RAINFALL
YESTERDAY EVENING.

$$


TT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
543 PM MDT SAT JUN 18 2011

.UPDATE...UPON COORDINATION WITH THE STORM PREDICTION CENTER AND
THE NORTH PLATTE OFFICE...WE HAVE CANCELLED THE SEVERE THUNDERSTORM
WATCH FOR OUR WESTERN NEBRASKA PANHANDLE COUNTIES. DECREASED RAIN
CHANCES THIS EVENING BASED ON TRENDS AND NAM MODEL GUIDANCE.  RUBIN

&&

.PREV DISCUSSION... /ISSUED 323 PM MDT SAT JUN 18 2011/

SHORT TERM...THIS AFTERNOON THROUGH MONDAY NIGHT
PRETTY ACTIVE. WITH ONGOING SEVERE WEATHER THIS AFTERNOON WHICH
STARTED RELATIVELY EARLY TODAY...WILL KEEP THE DISCUSSION BRIEF.
SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 8 PM TONIGHT FOR THE
SOUTHERN NEBRASKA PANHANDLE. ONE TORNADO HAS BEEN OBSERVED WEST OF
SCOTTS BLUFF THIS AFTERNOON WITH NUMEROUS REPORTS OF 0.50 TO 0.75
INCH HAIL. SHOWERS AND TSTORMS WILL CONTINUE MOVING EAST NORTH
EAST THROUGH THIS EVENING AT 20 TO 25 MPH. TSTORMS WILL GRADUALLY
DIMINISH TONIGHT TO WIDELY SCATTERED RAIN SHOWERS ACROSS THE AREA.
THERE IS SOME POTENTIAL FOR FOG ACROSS WESTERN NEBRASKA TONIGHT
WITH MOIST SOUTHEAST FLOW...BUT WITH LOW CONFIDENCE WILL KEEP OUT
OF THE FORECAST FOR NOW.

ANOTHER ACTIVE DAY FOR SEVERE THUNDERSTORMS EXPECTED SUNDAY WITH
MODEL SOUNDINGS SHOW VERY UNSTABLE CONDITIONS...PLENTY OF MOISTURE
WITH PW/S AROUND AN INCH...AND CAPE VALUES BETWEEN 2000 TO 3000 J/KG.
THE BEST CHANCE FOR SEVERE WEATHER APPEARS TO BE ALONG AND EAST OF
THE LARAMIE RANGE AND ESPECIALLY OVER WESTERN NEBRASKA AS A STRONG
STORM SYSTEM FOR THIS TIME OF THE YEAR PUSHES EASTWARD ACROSS
COLORADO AND INTO THE HIGH PLAINS SUNDAY NIGHT.

FOR LATE SUNDAY AND MONDAY...WIDESPREAD MODERATE TO HEAVY RAINFALL
IS ALSO A CONCERN WITH NOT JUST RIVER FLOODING BUT ALSO FLASH
FLOODING. QUITE A LOT OF RAIN HAS ALREADY FALLEN OVER EXTREME
SOUTHEAST WYOMING AND ESPECIALLY THE SOUTHERN NEBRASKA PANHANDLE
OVER THE LAST WEEK OR TWO WHICH THE GROUND ALREADY PRETTY
SATURATED. EXPECT MOST OF THE RAINFALL WITH THIS NEXT STORM TO BE
MAINLY RUNOFF...RESULTING IN THE POSSIBILITY OF FLASH FLOODING AND
FURTHER RIVER FLOODING. EVEN ACROSS WYOMING...WILL NEED TO WATCH
RIVER LEVELS AND PRECIP RATES CLOSELY THROUGH MONDAY. ISSUED A
FLOOD WATCH FOR THE MEDICINE BOW RIVER NORTH OF THE SNOWY RANGE.
WILL ALSO LIKELY ISSUE A FLASH FLOOD WATCH FOR ALL OF WESTERN
NEBRASKA STARTING SUNDAY AND CONTINUING THROUGH MONDAY EVENING.

LONG TERM...TUESDAY THROUGH SATURDAY
THERE IS LITTLE OVERALL CHANGE BETWEEN THE 00Z AND 12Z GLOBAL
MODEL DATA...HENCE A CONSENSUS APPROACH WITH MINOR MODIFICATIONS
TO THE GRIDS WAS FOLLOWED. THE LOW PRESSURE SYSTEM RESPONSIBLE
FOR THE INCLEMENT WEATHER MONDAY WILL MOVE TO NEAR THE NEBRASKA/
IOWA BORDER TUESDAY. CONSEQUENTLY...RAIN CHANCES WILL LOWER FROM
WEST TO EAST WITH DECREASING CLOUDS AND MILDER TEMPERATURES OVER
WYOMING DURING THE AFTERNOON AS AN UPPER-LEVEL RIDGE APPROACHES.
THIS RIDGE WILL SLOWLY BUILD OVER THE CWA WEDNESDAY THROUGH
THURSDAY. SURFACE HIGH PRESSURE OVER THE NORTHERN HIGH PLAINS WILL
SETTLE SOUTHWARD WEDNESDAY...WITH THE LOW LEVEL FLOW VEERING FROM
NORTHEASTERLY TO SOUTHEASTERLY EAST OF THE LARAMIE RANGE DURING
THE DAY. WEAK UPSLOPE FLOW AND AFTERNOON INSTABILITY MAY SPARK
ISOLATED CONVECTION FOR THE SNOWY...SIERRA MADRE AND SOUTHERN
LARAMIE RANGE. LOW LEVEL SOUTH TO SOUTHEAST FLOW WILL INCREASE
THURSDAY...WITH ISOLATED CONVECTION OVER AND WEST OF THE LARAMIE
RANGE. AREAS FURTHER EAST INTO THE WESTERN NEBRASKA PANHANDLE WILL
BE CAPPED SO EXPECT DRY CONDITIONS THERE. THE UPPER RIDGE AXIS
SLIDES EAST INTO THE PLAINS FRIDAY AS ANOTHER UPPER LOW DEVELOPS
OVER THE PACIFIC NORTHWEST. THE FLOW ALOFT BECOMES SOUTHWEST
DOWNSTREAM OF THE UPPER LOW AND TROUGH AS THEY SHIFT EAST TOWARD
THE NORTHERN ROCKIES. INCREASING INSTABILITY FROM RETURN FLOW
WILL ADVECT HIGHER LOW LEVEL MOISTURE NORTHWARD ALONG THE FRONT
RANGE BOTH FRIDAY AND SATURDAY AFTERNOON. THE 12Z GFS DEPICTS CAPE
VALUES IN EXCESS OF 2000-3000 J/KG OVER THE WESTERN NEBRASKA
PANHANDLE THOSE AFTERNOONS...SO THE POTENTIAL REMAINS FOR SOME
SEVERE THUNDERSTORMS OVER THE EASTERN PLAINS. AFTER A COOLER THAN
AVERAGE TUESDAY...700 MB TEMPERATURES WILL RISE TO AROUND 10
DEGREES CELSIUS WEDNESDAY AND 15 DEGREES CELSIUS THURSDAY THROUGH
SATURDAY. HIGHS TUESDAY WILL BE IN THE 40S/50S MOUNTAINS TO
60S/LOWER 70S EAST...50S MOUNTAINS AND 60S/70S ELSEWHERE
WEDNESDAY...AND 60S MOUNTAINS TO 70S/80S ELSEWHERE THURSDAY
THROUGH SATURDAY.

AVIATION...18Z TAF ISSUANCE
SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP EAST OF THE LARAMIE
RANGE AND MOVE EAST AND NORTHEAST INTO THE WESTERN NEBRASKA PANHANDLE
THROUGH EARLY EVENING. SOME OF THE STORMS WILL BE STRONG TO SEVERE
WITH LARGE HAIL...BRIEF HEAVY RAIN AND STRONG/GUSTY WINDS FOR THE
WESTERN NEBRASKA PANHANDLE. CIGS/VSBYS MAY BE REDUCED BRIEFLY WITHIN
THESE THUNDERSTORMS TO THE MVFR CATEGORY. HOWEVER...WITH LIMITED
CONFIDENCE ON CONVECTIVE TIMING AND COVERAGE...WILL MAINTAIN VCTS
FOR THE EASTERN TERMINALS UNTIL 03Z. AFTER THE SHOWERS AND
THUNDERSTORMS END LATER THIS EVENING...MAY SEE A BRIEF PERIOD OF
PATCHY LOW CLOUDS AND FOG ACROSS THE PANHANDLE TOWARD DAYBREAK.
CONTRARY TO THE 00Z MOS GUIDANCE...12Z IS NOT PREDICTING ANY
RESTRICTIONS AND WILL LEAVE OUT OF THE TAFS FOR NOW.

FIRE WEATHER...NO FIRE WEATHER CONCERNS OVER THE NEXT 5 DAYS WITH
WIDESPREAD RAINFALL AND POTENTIAL FLASH FLOODING ACROSS THE AREA
FOR SUNDAY AND MONDAY AS A LATE SEASON STORM SYSTEM MOVES ACROSS
THE CENTRAL ROCKIES.

HYDROLOGY...
A LOW PRESSURE SYSTEM MOVING FROM UTAH ACROSS COLORADO AND INTO
NEBRASKA SUNDAY THROUGH MONDAY NIGHT WILL BRING PERIODS OF SHOWERS
AND SCATTERED THUNDERSTORMS. ELEVATIONS ABOVE 8500 FEET WILL
EXPERIENCE SNOW SHOWERS WITH SEVERAL INCHES OF SNOW ACCUMULATION
SUNDAY NIGHT AND MONDAY MORNING. MOUNTAIN TEMPERATURES IN THE 30S
AND 40S WILL DECREASE THE RATE OF SNOW MELT...HOWEVER A HALF TO ONE
INCH OF RAINFALL ON TOP OF THE EXISTING SNOW PACK WILL CAUSE MORE
RUNOFF AND RISES ON THE UPPER NORTH PLATTE...LITTLE SNAKE AND
MEDICINE BOW RIVERS. ISSUED A FLOOD WATCH FOR THE NORTH SNOWY RANGE
FOOTHILLS INCLUDING THE MEDICINE BOW RIVER AND ROCK CREEK FROM
SUNDAY AFTERNOON THROUGH MONDAY EVENING. FLOOD WARNINGS REMAIN IN
EFFECT UNTIL FURTHER NOTICE FOR SARATOGA...SINCLAIR...ENCAMPMENT AND
LARAMIE. LEVELS AT OR ABOVE BANKFULL WILL CONTINUE ON THE LITTLE
LARAMIE RIVER...LITTLE SNAKE RIVER AT SAVERY...AND MEDICINE BOW NEAR
HANNA AND ELK MOUNTAIN.

FOR AREAS EAST OF THE LARAMIE RANGE INTO THE WESTERN NEBRASKA
PANHANDLE...LOOKING AT ONE TO AS MUCH AS THREE INCHES OF RAINFALL
FROM SUNDAY THROUGH MONDAY NIGHT. RUNOFF FROM THIS RAINFALL IN
ADDITION TO RESERVOIR RELEASES WILL RESULT IN RISES ON THE LOWER
NORTH PLATTE RIVER. FLOOD WARNINGS REMAIN IN EFFECT FOR
HENRY...MITCHELL AND MINATARE UNTIL FURTHER NOTICE. HIGH WATER
LEVELS WILL CONTINUE AT ORIN AND BRIDGEPORT.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...FLOOD WATCH FROM NOON SUNDAY TO MIDNIGHT TUESDAY FOR WYZ110.
NE...NONE.

&&

SHORT TERM/FIRE WEATHER...TJT
LONG TERM/AVIATION/HYDROLOGY...JAMSKI

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
552 PM MDT SAT JUN 18 2011

WYZ101>118-191645-
CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY-
NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS-
SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY-
EAST PLATTE COUNTY-GOSHEN COUNTY-CENTRAL CARBON COUNTY-
NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY-
SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE-
LARAMIE VALLEY-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS-
CENTRAL LARAMIE COUNTY-
552 PM MDT SAT JUN 18 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST WYOMING.

.DAY ONE...TONIGHT

ISOLATED SHOWERS AND THUNDERSTORMS WILL OCCUR OVERNIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A STRONG LOW PRESSURE SYSTEM WILL MOVE INTO NORTHERN COLORADO
SUNDAY AFTERNOON AND SLOWLY MOVE THROUGH THE AREA THROUGH MONDAY.
THIS LOW IS EXPECTED TO BRING WIDESPREAD RAINFALL WITH MODERATE TO
LOCALLY HEAVY RAINFALL POSSIBLE. SOME SEVERE STORMS ARE EXPECTED
SUNDAY AFTERNOON AND EVENING EAST OF THE LARAMIE RANGE.

MODERATE FLOODING WILL CONTINUE ON THE RIVERS FLOWING FROM THE
SNOWY AND SIERRA MADRE RANGES. ADDITIONAL WIDESPREAD RAIN OVER
THESE ALREADY FLOODING RIVERS MAY CAUSE SIGNIFICANT FURTHER RISES
ON AREA RIVERS LATE THIS WEEKEND AND EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY AND TONIGHT. SPOTTERS
ARE ENCOURAGED TO REPORT HAIL OF ANY SIZE AND WIND DAMAGE TO THE
NATIONAL WEATHER SERVICE.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

NEZ002-003-019>021-054-055-095-096-WYZ119-191645-
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-EAST LARAMIE COUNTY-
552 PM MDT SAT JUN 18 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA
PANHANDLE AND EASTERN LARAMIE COUNTY IN WYOMING.

.DAY ONE...TONIGHT

ISOLATED THUNDERSTORMS WILL OCCUR NEAR SIDNEY THIS EVENING...AND
THEN ACROSS THE ENTIRE PANHANDLE AFTER MIDNIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A STRONG LOW PRESSURE SYSTEM IS EXPECTED TO MOVE INTO NORTHERN
COLORADO SUNDAY AFTERNOON AND SLOWLY MOVE THROUGH THE AREA THROUGH
MONDAY. THIS LOW IS EXPECTED TO BRING WIDESPREAD RAINFALL WITH
MODERATE TO HEAVY RAINFALL EXPECTED. SEVERE THUNDERSTORMS ARE
POSSIBLE SUNDAY AFTERNOON AND EVENING.

MINOR TO MODERATE FLOODING WILL CONTINUE ON THE RIVERS FLOWING
FROM THE SOUTHEAST WYOMING MOUNTAINS. ADDITIONAL WIDESPREAD RAIN
OVER THE ALREADY FLOODING NORTH PLATTE RIVER MAY CAUSE SIGNIFICANT
FURTHER RISES LATE THIS WEEKEND AND EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE TODAY AND TONIGHT.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

RUBIN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
107 PM MDT SAT JUN 18 2011

NEZ019-020-WYZ108-181945-
BANNER NE-GOSHEN COUNTY WY-SCOTTS BLUFF NE-
107 PM MDT SAT JUN 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GOSHEN...
SOUTHWESTERN SCOTTS BLUFF AND NORTHWESTERN BANNER COUNTIES UNTIL 145
PM MDT...

AT 102 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 10 MILES SOUTHWEST OF HAWK SPRINGS...OR 28 MILES
SOUTHWEST OF TORRINGTON...MOVING EAST AT 25 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  HAWK SPRINGS...
  HAWK SPRINGS RECREATION AREA...
  LA GRANGE...
  HWY 85 MM 60...
  HWY 85 AT HIGHWAY 151...

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

TJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
200 PM MDT SAT JUN 18 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0200 PM     TORNADO          3 W MITCHELL            41.94N 103.87W
06/18/2011                   SCOTTS BLUFF       NE   LAW ENFORCEMENT

            TORNADO ON THE GROUND 3 MILES WEST OF MITCHELL MOVING
            NORTHEAST.

&&

TTRUDEL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
217 PM MDT SAT JUN 18 2011

NEZ054-055-182115-
CHEYENNE NE-KIMBALL NE-
217 PM MDT SAT JUN 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR EXTREME EASTERN KIMBALL AND
NORTHWESTERN CHEYENNE COUNTIES UNTIL 315 PM MDT...

AT 215 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR POTTER...OR 18 MILES WEST OF SIDNEY...MOVING
EAST AT 20 MPH.

HAIL UP TO THE SIZE OF NICKELS IS EXPECTED WITH THIS STORM...ALONG
WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

THIS STORM WILL BE NEAR...
I-80 EXIT 48 AROUND 240 PM MDT.
BROWNSON AROUND 245 PM MDT.
GURLEY AROUND 310 PM MDT.

THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 35 AND
50.

THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV
STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

RUBIN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
228 PM MDT SAT JUN 18 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0226 PM     HAIL             N POTTER                41.22N 103.31W
06/18/2011  E0.50 INCH       CHEYENNE           NE   TRAINED SPOTTER

            GROUND IS COVERED WITH HAIL FROM PEA TO MARBLE IN SIZE.

&&

BCHAPMAN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
233 PM MDT SAT JUN 18 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0231 PM     HAIL             POTTER                  41.22N 103.31W
06/18/2011  E0.50 INCH       CHEYENNE           NE   TRAINED SPOTTER

            GROUND COVERED TO ABOUT ONE INCH DEEP WITH PEA TO MARBLE
            SIZED HAIL.

&&

BCHAPMAN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
349 PM MDT SAT JUN 18 2011

NEZ055-182245-
CHEYENNE NE-
349 PM MDT SAT JUN 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CHEYENNE COUNTY UNTIL 445
PM MDT...

AT 344 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES EAST OF
POTTER TO LODGEPOLE...AND MOVING EAST AT 15 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

THESE STORMS WILL BE NEAR...
RURAL CENTRAL CHEYENNE COUNTY THROUGH 445 PM MDT

THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 44 AND
49.

THESE STORMS MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV
STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

RUBIN