Weather


Casper, Wyoming

Current Conditions

 
Temp: 71°
Dew Point: 40°
Humidity: 32%
Wind: West 12 mph
Visibility: 10.0 miles
Pressure: 29.73 in. +
Sky: Clear

 

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Almanac

Average High: 85°

Average Low: 52°

Record high/year: 99° (2001)

Record low/year: 38° (1972)

Sunrise: 5:33 AM

Sunset: 8:46 PM

Detailed History

Sun and Moon

Sunrise: 05:33 AM (MDT)

Moon Rise: 08:33 AM (MDT)

Sunset: 08:46 PM (MDT)

Moon Set: 10:46 PM (MDT)

Moon Phase

Today
Jul. 10
Jul. 18
Jul. 25
Aug. 01

 

Local Radar

Local Satellite



Next 12 Hours

 
7  am
10  am
1  pm
4  pm
7  pm
Partly Cloudy Partly Cloudy
Partly Cloudy Partly Cloudy
Chance of a Thunderstorm Chance of T-storms
Chance of a Thunderstorm Chance of T-storms
Chance of a Thunderstorm Chance of T-storms
61°
74°
86°
92°
88°

 

Forecast data from the National Digital Forecast Database


5-Day Forecast

Saturday Chance of a Thunderstorm Hi 92° Lo 58° Chance of T-storms
Sunday Chance of a Thunderstorm Hi 85° Lo 54° Chance of T-storms
Monday Partly Cloudy Hi 85° Lo 56° Partly Cloudy
Tuesday Partly Cloudy Hi 90° Lo 58° Partly Cloudy
Wednesday Partly Cloudy Hi 92° Lo 58° Partly Cloudy

 

Forecast for Natrona County Lower Elevations

Updated: 2:26 am MDT on July 5, 2008

Today

Partly cloudy. Isolated thunderstorms. Some thunderstorms may produce gusty winds and small hail in the afternoon. Highs 88 to 92. Southwest winds around 15 mph shifting to the northwest in the afternoon. Chance of thunderstorms 20 percent.

 

Tonight

Partly cloudy. Isolated thunderstorms in the evening. Some thunderstorms may produce gusty winds and small hail in the evening. Lows 53 to 57. North winds around 15 mph early in the evening becoming northeast around 15 mph after midnight. Chance of thunderstorms 20 percent.

 

Sunday

Partly cloudy. Scattered thunderstorms in the afternoon. Some thunderstorms may be severe with gusty winds...large hail and heavy rainfall. Highs 83 to 87. Chance of thunderstorms 40 percent.

 

Sunday Night

Partly cloudy. Scattered thunderstorms in the evening. Some thunderstorms may be severe with gusty winds...large hail and heavy rainfall in the evening. Lows 52 to 56. North winds around 15 mph in the evening. Chance of thunderstorms 40 percent.

 

Monday

Mostly sunny. Highs 85 to 88.

 

Monday Night

Mostly clear. Lows in the mid to upper 50s.

 

Tuesday

Mostly sunny in the morning...then partly cloudy with a 20 percent chance of thunderstorms in the afternoon. Highs in the lower to mid 80s.

 

Tuesday Night

Partly cloudy with a 20 percent chance of thunderstorms in the evening...then mostly clear after midnight. Lows in the mid to upper 50s.

 

Wednesday

Mostly sunny. Highs in the mid to upper 80s.

 

Wednesday Night

Mostly clear. Lows in the mid to upper 50s.

 

Thursday

Mostly sunny. Highs near 90.

 

Thursday Night

Mostly clear. Lows in the mid to upper 50s.

 

Friday

Mostly sunny. Highs in the lower to mid 90s.

 

 

 Local Storm Report 



07/04/2008 0135 PM

4 miles ESE of Violet, St Bernard Parish.

Thunderstorm wind damage, reported by public.


            *** 1 inj *** tree fell on home in Toca causing porch to
            fail and resulting in one injury. Resident was
            transported to hospital with broken leg.




Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Hospital Heliport, Casper, WY

Updated: 6:19 AM MDT

Temperature: 77.2 °F Dew Point: 42 °F Humidity: 28% Wind: WNW at 20.7 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Historical Graphs

Location: E. 19th St., Casper, WY

Updated: 6:19 AM MDT

Temperature: 74.5 °F Dew Point: 44 °F Humidity: 33% Wind: NNW at 13.8 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Historical Graphs

Location: Casper Mountain Foothills, Casper, WY

Updated: 3:01 AM MDT

Temperature: 67.8 °F Dew Point: 45 °F Humidity: 44% Wind: Calm Pressure: 29.49 in Hourly Precipitation: 0.00 in Heat Index: - Historical Graphs

Location: APRSWXNET Casper WY US, Casper, WY

Updated: 6:04 AM MDT

Temperature: 76 °F Dew Point: 43 °F Humidity: 31% Wind: WSW at 6 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Historical Graphs

Location: Valley Hills / Sunrise area, Casper, WY

Updated: 6:17 AM MDT

Temperature: 74.5 °F Dew Point: 44 °F Humidity: 33% Wind: Calm Pressure: 29.57 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Historical Graphs

Location: Centennial Jr High, Casper, WY

Updated: 6:19 AM MDT

Temperature: 75.7 °F Dew Point: 43 °F Humidity: 31% Wind: NNW at 3.5 mph Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 77 °F Historical Graphs

Location: MesoWest CASPER MTN. WY US SNOTEL, Casper, WY

Updated: 5:00 AM MDT

Temperature: 63 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Historical Graphs

Location: RAWS CASPER MOUNTAIN WY US, Casper, WY

Updated: 5:52 AM MDT

Temperature: 65 °F Dew Point: 34 °F Humidity: 32% Wind: ENE at 2 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Historical Graphs

Location: MesoWest RENO HILL WY US SNOTEL, Evansville, WY

Updated: 5:00 AM MDT

Temperature: 59 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Historical Graphs

Location: North of Rolling Hills WY, Glenrock, WY

Updated: 6:09 AM MDT

Temperature: 70.6 °F Dew Point: 40 °F Humidity: 33% Wind: WSW at 5.0 mph Pressure: 29.49 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Historical Graphs

MSN Maps of:

Temperature Dew Point Humidity Wind Pressure Hourly Precipitation -

NWS Forecaster Discussion




164 
fxus65 kriw 050904 
afdriw 


Area forecast discussion 
National Weather Service Riverton Wyoming 
304 am MDT Sat Jul 5 2008 


Short term...today through Monday night 
ridge axis moved east this past evening as subtropical moisture 
plume over took the northern and central rockies. Has a few decent 
storms yesterday with one storm tracked from near diversion dam to 
just south of Ten Sleep producing dime size hail. The bulk of the 
activity was over Montana where the best jet dynamics were. 


For today...subtropical moisture will continue to move across 
Wyoming. Though it will be weaker as the source gets pinched off 
by a trough making land fall along the West Coast. Shortwave will 
move across Montana this morning...driving a cold front into 
northern Wyoming today. This will be a focus for thunderstorm 
development this afternoon and evening. The front will stall over 
southern Bighorn Basin and along the Johnson and Natrona County 
line. Will also have decent instability around as well...with the 
best cape over Johnson County...between 1000 and 1500 j/kg and 
<1000 j/kg over the Bighorn Basin. Some storms could be severe 
based on what has been happening over the past week. Not much 
instability elsewhere...though cant rule it out with that moisture 
around. 


Sunday afternoon and evening is looking quite active with some 
shortwave activity in the flow and very good divergence aloft. 
Right entrance jet will be off over the Dakotas...but some of that 
may influence thunderstorm development over the northeast 
County Warning Area...where the best instability lies. Southeast to east return 
flow over the central and east allowing moist air to advect in. 
Precipitable waters over the northeast around 1.25 inches and around and inch 
over the Bighorn Basin. Very favorable conditions for severe 
thunderstorms. Wouldn't be surprised to see severe storms over 
Fremont County as well. 


Drier air moves in for Monday behind the shortwave. Still enough 
moisture for thunderstorms. Best instability lies over the center 
of the state with convective available potential energy under 1000 j/kg. Will have the northeast 
flow over the area so should hang on to some low level moisture. 
Temperatures over the next few days will be cooler than Friday...with 
more normal readings in the 80s. 




Long term...Tuesday through Saturday 
shortwave that is forecast to move across eastern Montana and ND Monday 
night will likely push a cold front southward into our northern and eastern zones 
setting the state for at least some isolated thunderstorms Tuesday 
afternoon and evening. Will expand our coverage a little bit to 
include all areas east of The Divide based on this expectation. Northwest 
flow continues Wednesday with the GFS leaving a moist Ely flow 
east of The Divide. The Euro dries it out some but still leaves 
some moisture east of The Divide. For now...will expand our probability of precipitation 
to include our favored northwest flow thunderstorm development areas and see if 
these trends continue again tonight. Flat Ridge pushes in Thursday 
for decreasing thunderstorm threat. Will confine thunderstorms chances to just the 
northern mountains on Friday...a significant trough is forecast to dig into 
southwestern Canada and possibly the pacnw. Model solutions have changed 
several times on how strong this trough would be and how far S it 
would dig. The GFS and European model (ecmwf) are at least in reasonable agreement 
tonight. Friday may be a hot and breezy to windy day east of The 
Divide ahead of the associated front. The far west and northwest may see 
some strong storms with right entrance region jet streak dynamics. 
Other concern will be potential subtropical moisture being drawn 
northward in this pattern. Both models show this and it seems to be just 
a matter of timing. I lean more towards the GFS allowing this be 
drawn northward fast enough to impact at least our eastern zones and 
possibly the entire area by Saturday. There is even a chance that 
the beginnings of this moisture could impact the Red Desert by 
later Friday. Plenty of time to fine tune the details but it could 
be a very active thunderstorm period beginning as early as late 
Friday and then continuing through at least Saturday and perhaps 
longer. And as has been the case...the really hot temperatures that the 
GFS has been advertising for days keep getting delayed and the 
duration keeps shrinking. Luckily we've never bought into those 
hot GFS temperatures but I have trended some of our highs down even 
further. A few warm to very warm days will still likely occur but 
a dry...hot period doesn't appear very likely. 


&& 


Aviation... 
a cold front will move across the region today. This front will help 
develop widely scattered thunderstorms during the afternoon. Gusty 
winds can be expected near any storms. This includes Sunday 
afternoon and evening when even a better chance of thunderstorms 
exist...especially across central and northern Wyoming. 
MVFR conditions are possible around the storms. Otherwise...VFR 
conditions will prevail across west central Wyoming this weekend. 


&& 


Fire weather... 
a cold front will move into the north this morning and stall along 
The Owl creek mountains and along the Johnson/Natrona County 
border. This will be a focus for thunderstorms this afternoon and 
evening. Plenty of middle and high level moisture will be available 
as a plume of moisture from the Pacific remains over Wyoming. 
Thunderstorms will be most likely over the north...but could occur 
across the area. The greatest thunderstorm coverage will occur on Sunday 
as easterly flow east of The Divide brings in moist air form the 
plains. Monday looks to be a drier day...though storms are still 
possible over the central and east. 


&& 


Riw watches/warnings/advisories...none. 


&& 


$$ 


Short term...twb 
long term...skrbac 
aviation...kpl 
fire weather...twb 


















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