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Flood Advisory


FLOOD ADVISORY
NATIONAL WEATHER SERVICE DENVER CO
1117 PM MDT Fri May 26 2017

...The Flood Advisory continues for the following rivers in
Colorado...

  Cache La Poudre River near Greeley affecting Weld County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons with interests along these rivers are urged to use caution.
Avoid flooded areas and stay clear of river banks that could become
unstable due to the high flows.

&&

COC123-290000-
/O.CON.KBOU.FL.Y.0005.000000T0000Z-170529T0000Z/
/GRPC2.N.SM.000000T0000Z.000000T0000Z.000000T0000Z.OO/
1117 PM MDT Fri May 26 2017

The Flood Advisory continues for
  the Cache La Poudre River near Greeley.
* until Sunday evening.
* At 10:30 PM Friday the stage was 7.3 feet.
* Flood stage is 8.0 feet.
* Forecast...The river will crest near 7.4 feet early Saturday
  morning.
* Impact...At 7.5 feet...Sections of the Poudre River Trail begin to
  overtop from Windsor to Greeley.

&&

LAT...LON 4047 10495 4046 10474 4043 10459 4040 10462
 4043 10474 4043 10488

$$


Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service GRAND JUNCTION CO
511 AM MDT Sat May 27 2017

COZ001>014-017>023-UTZ022>025-027>029-281200-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-
Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide-
Northwest San Juan Mountains-Southwest San Juan Mountains-
Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
511 AM MDT Sat May 27 2017

This hazardous weather outlook is for eastern Utah and western
Colorado.

.DAY ONE...Today and Tonight

Scattered showers and thundestorms are again expected across much
of eastern Utah and western Colorado today and this evening.
Showers will be most numerous north of the San Juan Mountains to
the Wyoming state line. Gusty winds to 45 mph, brief heavy
precipitation and small hail will accompany the strongest storms.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Passing weather disturbances will bring a chance for showers and
thunderstorms each afternoon and evening through next week. Gusty
outflow winds, small hail and brief heavy precipitation will be
possible with the stronger storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Rapid City SD
406 AM MDT Sat May 27 2017

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-281015-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Black Hills-Northern Foot Hills-Rapid City-
Southern Foot Hills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Pennington Co Plains-Haakon-Fall River-
Oglala Lakota-Jackson-Bennett-Mellette-Todd-Tripp-
Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Hermosa Foot Hills-Northern Campbell-Southern Campbell-
Western Crook-Wyoming Black Hills-Weston-Northeastern Crook-
406 AM MDT Sat May 27 2017 /506 AM CDT Sat May 27 2017/

This Hazardous weather outlook is for western South Dakota and
Northeastern Wyoming.

.DAY ONE...Today and Tonight

Isolated thunderstorms will be possible this afternoon and
evening. Severe weather is not expected.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Isolated thunderstorms will be possible on Sunday, as well as
Wednesday through Friday. Widespread severe storms are not
anticipated at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

$$

Hazardous Weather Outlook
National Weather Service Riverton WY
325 AM MDT Sat May 27 2017

WYZ001>020-022>030-281200-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
325 AM MDT Sat May 27 2017

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Isolated thunderstorms possible this afternoon and evening mainly
over the mountains and adjacent foothills. Gusty outflow winds,
even from distant thunderstorms could cause choppy waters on area
lakes and reservoirs.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Sunday through Friday...Isolated to widely scattered thunderstorms
in the afternoon and evening...best chances over the mountains
and adjacent foothills. Gusty outflow winds, even from distant
thunderstorms could cause choppy waters on area lakes and
reservoirs this Memorial Day Weekend.

Wednesday through next weekend...Potential for some flooding to
develop along creeks and rivers due to rapid mountain snowmelt.

.SPOTTER INFORMATION STATEMENT...

Spotters are urged to report any significant weather. Thank you,
and have a safe Memorial Day Weekend.

$$

Hazardous Weather Outlook
National Weather Service Cheyenne WY
321 AM MDT Sat May 27 2017

NEZ002-003-019>021-054-055-095-096-WYZ102-108-281000-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-Niobrara County-Goshen County-
321 AM MDT Sat May 27 2017

This hazardous weather outlook is for portions of western
Nebraska...east central Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Scattered showers and a few thunderstorms are expected this
afternoon into this evening.  No severe storms are expected.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Chances for mainly afternoon and evening thunderstorms will exist
mainly Wednesday through Friday.

.Spotter information statement...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Cheyenne WY
321 AM MDT Sat May 27 2017

WYZ101-103>107-109>119-281000-
Converse County Lower Elevations-North Laramie Range-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Laramie Range and Southwest Platte County-
East Platte 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-East Laramie County-
321 AM MDT Sat May 27 2017

This hazardous weather outlook is for portions of east central
Wyoming...south central Wyoming and southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Scattered showers and a few thunderstorms are expected this
afternoon into this evening.  No severe storms are expected.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Chances for mainly afternoon and evening thunderstorms will exist
mainly on Sunday, then again Wednesday through Friday.

.Spotter information statement...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
318 AM MDT Sat May 27 2017

COZ030>051-280930-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
318 AM MDT Sat May 27 2017


This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

A weather system will move across the area today and will bring a
good chance of showers and a few thunderstorms. The storms may
produce small hail and brief heavy rain over the plains. In the
mountains there will be snow above 10000 feet with accumulations
of 2 to 4 inches possible. Precipitation will gradually end early
this evening as the weather system moves out of the area.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Warmer temperatures are expected from Sunday through the middle
of next week, but each afternoon will see a chance of thunderstorms,
especially over the higher terrain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$


Hydrologic Outlook


Hydrologic Outlook
WYC003-013-019-023-029-035-039-043-271608-
Hydrologic Outlook
National Weather Service Riverton WY
1008 AM MDT Fri May 26 2017

...Warm mountain temperatures Wednesday through Friday of
next week will accelerate snowmelt runoff...

...Rain on melting snowpack Friday through Sunday of next
week will greatly increase the flood threat...

The snowpack at 8,500 to 9,500 foot elevation is very ripe or water
laden and is ready to melt off.  There is still 30 to 35 inches of
snow water equivalents (SWEs) at several SNOTEL locations at the
9,000 to 10,000 foot elevation across the Wind, Green, Shoshone,
and Upper Yellowstone Basins.

Afternoon temperatures at the 9,000 foot elevation are expected to
warm into the lower to middle 60s Wednesday through Friday of
next week.  Morning low temperatures will also be above the frost
temperature of 37 degrees Wednesday through Saturday of next week.
Windy conditions over the mountains are expected Wednesday and again
on Friday. Cold front will move through central Wyoming Friday evening.
Widespread rainshowers are expected Friday evening through Saturday
morning.  Scattered rainshowers are forecasted continue through the rest
of the weekend.

Accelerated snowmelt runoff will cause sharp increases in stream and
river levels Thursday morning through Saturday morning. Rain on a melting
snowpack next weekend will cause additional significant rises to creeks
and rivers. Flooding is expected along main stem rivers like the Green,
Little Wind, Wind, Sweetwater, and Shoshone by next weekend.

People living near flood prone areas along streams and rivers should make
final preparations for high water late next week through next weekend.
Mountain streams run the highest in the late afternoon through early evening.
Do not attempt to cross streams at that time as the swift water will easily
carry you downstream.

Graphical forecasts are available at:
http://water.weather.gov/ahps2/index.php?wfo=riw
Visit weather.gov/riverton and select the rivers & lakes tab for
graphical forecasts and additional information.

$$
jtfahey

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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