The web cam located at Star Valley Ranch captured some impressive and rapid development of cumulonimbus over the mountains to the west of Star Valley. The storm formed and then dissipated just as fast.
Time Lapse of Cumulonimbus
A BLOG ABOUT WEATHER FORECASTING AND OBSERVING AS IT RELATES TO STAR VALLEY, WYOMING IN PARTICULAR
Saturday, June 29, 2013
Friday, June 28, 2013
Wyoming Video Weather Briefing
Following is the link to the weekly Wyoming Weather Briefing provided by the Riverton WFO
Wyoming Weather Briefing
Wyoming Weather Briefing
Wednesday, June 26, 2013
Potentially Deadly Heat Wave Arizona, Nevada and California Deserts This Weekend
For those who live, or are in Star Valley currently, we can be thankful. It is going to be a very hot several days in the desert valleys of the Southwest. The culprit is an unusually large upper high pressure system that will develop by the end of this week. Following are two 500mb charts that provide the explanation of the impending heat wave. The first is this Wednesday morning, June 26th and then for mid day Saturday June29th.
This large upper high will provide ideal conditions for maximum heating, clear skies, warm very and dry subsiding air along with near maximum daylight hours.
Here are forecasts for major desert metropolitan areas through the coming weekend.
The Phoenix WFO has a Video web briefing that summarizes the upcoming heat wave and precautions that should be taken.
Web Briefing on Upcoming Heat Wave
This heat wave is coming up on the 100th Anniversary of the All-Time hottest temperature ever recorded on the Earth in Death Valley of 134 degrees. The official Death Valley weather station at Furnace Creek is forecast to reach within several degrees of that record by this weekend.
For real weather junkies there is a ceremony that will be held at Furnace Creek on the Anniversary of the record. Following is the information for those who would like to attend!
This large upper high will provide ideal conditions for maximum heating, clear skies, warm very and dry subsiding air along with near maximum daylight hours.
Here are forecasts for major desert metropolitan areas through the coming weekend.
The Phoenix WFO has a Video web briefing that summarizes the upcoming heat wave and precautions that should be taken.
Web Briefing on Upcoming Heat Wave
This heat wave is coming up on the 100th Anniversary of the All-Time hottest temperature ever recorded on the Earth in Death Valley of 134 degrees. The official Death Valley weather station at Furnace Creek is forecast to reach within several degrees of that record by this weekend.
For real weather junkies there is a ceremony that will be held at Furnace Creek on the Anniversary of the record. Following is the information for those who would like to attend!
Friday, June 21, 2013
Weekly Weather Briefing from Riverton WFO
The following is the link to the Weekly weather briefing issued by the Riverton WFO
Riverton WFO weekly weather briefing
Riverton WFO weekly weather briefing
Star Valley Summer Will Start Next Week
Following is the graph from the Thayne ES weather station for the past 30 days.
Thayne ES max/min temperatures May 20-June 20 2013 |
Following is the Weather Table for the Month of June at Thayne ES thus far
Noticeably is the the lack of any appreciable precipitation so far this June.
The current cool weather is the result of an upper trough of low pressure over the Northwest U.S.
500 MB Analysis midnight Thursday June 20 2013 |
This pattern will change over this next week leading to a large high pressure over the Western States.
500 MB forecast midnight Tuesday June 25 2013 |
This could reflect the beginning of the Southwestern Monsoon. So there is some hope of June ending on a wetter note, even with temperatures likely reaching into the upper 80s and low 90s by the end of next week.
Tuesday, June 18, 2013
Supercell Thunderstorm Visits the Tetons
Supercell Thunderstorm visits the Tetons.
Late afternoon on June 12, 2013 a Supercell Thunderstorm developed over the upper Snake River Valley of Eastern Idaho and rapidly moved east across the Tetons and the Jackson Hole region. Though no tornados were reported(and likely did not develop) this storm was a classic Supercell as seen both through the photographs taken and the radar signatures. Jim Woodmencey(Woody) of Mountainweather.com has provided a couple excellent blogs on his web site with the photographs and other interesting meteorological observations associated with the Supercell. The photo of the day was taken from Snow King looking west at the approaching storm
Here is a link to Woody's blog concerning the storm. Be sure to check out the blogs on both June 12th and 17th.
MountainWeather Blog
Thanks Woody
Late afternoon on June 12, 2013 a Supercell Thunderstorm developed over the upper Snake River Valley of Eastern Idaho and rapidly moved east across the Tetons and the Jackson Hole region. Though no tornados were reported(and likely did not develop) this storm was a classic Supercell as seen both through the photographs taken and the radar signatures. Jim Woodmencey(Woody) of Mountainweather.com has provided a couple excellent blogs on his web site with the photographs and other interesting meteorological observations associated with the Supercell. The photo of the day was taken from Snow King looking west at the approaching storm
Here is a link to Woody's blog concerning the storm. Be sure to check out the blogs on both June 12th and 17th.
MountainWeather Blog
Thanks Woody
Friday, June 14, 2013
Freezing Temperatures Saturday Morning
A strong cold front moved across Star Valley Thursday evening, and in its wake a much cooler air mass now covers Western Wyoming. High pressure now building into the area assures several near perfect weather days ahead.
However, conditions tonight and Saturday morning will be ideal for strong radiational cooling, leading to frost most areas Saturday morning. Temperatures in the typical colder valley locations primarily near the Salt River will likely drop below freezing by midnight, Friday night and possibly bottoming out in the mid to upper 20s by daybreak Saturday.
Obviously this is a threat to frost sensitive vegetables that may have just been planted such as tomatoes etc. These plants should be covered tonight.
Warming is then expected through the Fathers Day weekend, with a lessening frost threat Sunday morning.
However, conditions tonight and Saturday morning will be ideal for strong radiational cooling, leading to frost most areas Saturday morning. Temperatures in the typical colder valley locations primarily near the Salt River will likely drop below freezing by midnight, Friday night and possibly bottoming out in the mid to upper 20s by daybreak Saturday.
Obviously this is a threat to frost sensitive vegetables that may have just been planted such as tomatoes etc. These plants should be covered tonight.
Warming is then expected through the Fathers Day weekend, with a lessening frost threat Sunday morning.
Thursday, June 13, 2013
Fathers Day Weekend Weather Expected to be Ideal in Wyoming
The weekly issuance of the Weather Briefing from the Riverton Forecast Office highlights the near perfect weekend weather coming up in much of Wyoming.
Weekly Video Weather Briefing
Weekly Video Weather Briefing
Monday, June 10, 2013
Final 2013 Wyoming Water Supply Outlook
Hopefully we do not have a repeat of the summer of 2012, when it was so dry. Water supply will be adequate provided favorable summer shower activity occurs.
Final 2013 Wyoming Water Supply Outlook---June 7th
...May basin precipitation was near 96 percent of average across Wyoming…
…Mountain snowpack across Wyoming was 65 to 70 percent of average by early June…
…Below normal streamflow volumes are expected for the rest of the summer across most of Wyoming’s major watersheds…
…Total reservoir capacity in Wyoming was near 70 percent by early June…
May basin precipitation across Wyoming was near 96 percent of average. Precipitation numbers varied between 187 percent of normal over the Belle Fourche River Basin to 60 percent of normal over the Upper North Platte Drainage.
Streamflow snowmelt volumes are expected to be below normal for the rest of the summer across almost all of Wyoming’s major basins.
Total reservoir capacity in Wyoming was near 70 percent by early June. Levels at the major reservoirs in early June varied from 39 percent capacity at Pathfinder Dam to 95 percent capacity at Jackson Dam
Thursday, June 6, 2013
Three Years Later (June 6 2010)
A map below indicates ground zero for the downburst.
Following are several photos taken on June 6th 2013, 3 years later, of the obvious evidence of the power of the winds near the A Marker.
Google Maps Image 2009- pre-blowdown |
Post-blowdown from BING maps |
Additional Post-Blowdown from BING maps |
Also a photo was taken looking north from Star Valley Ranch as the storm was moving by, which was not toward the most intense portion .
On examination of the Pocatello radar data of the storm it was undoubtedly a Supercell. While tornados are associated with Supercells, in this case there is no evidence of any tornadic circulation. The storm was moving at close to 60mph and as the following radar images of the storm will attest, it was very impressive.
The first image shows a vertical radar cross-section with a very strong and high reflectivity core to above 30,000 feet and overall storm top to above 50,000 feet as it was approaching the Wyoming/Idaho line.
Pocatello Doppler Radar 7:19 PM June 6 2010 |
Pocatello Doppler Radar 7:19 PM June 6 2010 |
The following is the Vertically Integrated Liquid(VIL) which displays the area of greatest large hail potential.
Pocatello Doppler Radar VIL 7:19 PM June 6, 2010 |
Pocatello Doppler Storm Relative Velocity 7:06 PM June 6, 2010 |
While a tornado could not be ruled out with a storm of this intensity, the character of the storm and wind fall of the trees, all up-canyon, a downburst with speeds possibly to 80 mph or more was the likely culprit of the observed damage.
Sunday, June 2, 2013
Three Feet of Snow!
The recently departed storm that provided the second period of beneficial rainfall for Star Valley in the month of May, as expected put down a little snow in the higher mountains. It appears that the snow level remained generally above about 8000 feet. Willow Creek Snotel had several inches of wet snow. However it was a different story in the Big Horn Mountains.
Star Valley Ranch recorded 3.32 inches of rain for the month of May, while the station 5 miles southsoutheast of Smoot had 2.70 inches.
Riverton Forecast Office put together a summary of the Snow storm in the Big Horns.
3 Feet of Snow at the End of May?
Building a Weather-Ready Nation |
An excruciatingly slow moving upper level low pressure system tracked across northern Wyoming and into the northern plains over the past five days. It was also accompanied by an abundance of moisture and some very cold temperatures aloft. This system will continue to wrap moisture around the low and into the region through Saturday.
Click Image to Enlarge
The above image shows the track of the storm system (yellow arrow) over the past few days. The current position of the upper level low center is located over the Dakotas as of Friday morning, however it will continue to wrap around moisture and bring precipitation (spotty image) in the cold air (blue shades) to the Bighorns through Saturday. Snow and rain will finally taper off on Saturday afternoon and evening. |
Click Image to Enlarge
The above image shows the amount of liquid precipitation that fell over central and northern Wyoming over the past 7 days. (Data is missing for Southwest Wyoming) |
Several inches to several FEET of snow fell across the northern mountains of Wyoming, while mainly rain fell below 8500 feet. So far, the big winner in the snow department is the Wyoming High Country Lodge, where three feet of snow has fallen in the past couple of days!
County | Station Name | Snowfall |
---|---|---|
Big Horn | Wyoming High Country Lodge | 36 |
Bald Mountain Snotel | 24 | |
Shell Creek Snotel | 8 | |
Bone Springs Divide Snotel | 4 | |
County | Station Name | Snowfall |
Washakie | Powder River Pass Snotel | 8 |
County | Station Name | Snowfall |
Johnson | Cloud Peak Reservoir Snotel | 4 |
Bear Trap Meadow Snotel | 4 | |
Little Goose Snotel | 1 |
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