Saturday, June 29, 2013
Time Lapse of Cumulonimbus
Friday, June 28, 2013
Wednesday, June 26, 2013
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
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
|500 MB Analysis midnight Thursday June 20 2013|
|500 MB forecast midnight Tuesday June 25 2013|
Tuesday, June 18, 2013
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.
Friday, June 14, 2013
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
Weekly Video Weather Briefing
Monday, June 10, 2013
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
Mountain snowpack across Wyoming decreased to below normal at around 65to 70 percent of average by early June. Snow water equivalents (SWEs) were45 to 55 percent of average across western and central Wyoming watersheds; while SWEs in southeast Wyoming drainages were near 70 percent of normal.
Thursday, June 6, 2013
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
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.
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 EnlargeThe 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 EnlargeThe 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!
|Big Horn||Wyoming High Country Lodge||36|
|Bald Mountain Snotel||24|
|Shell Creek Snotel||8|
|Bone Springs Divide Snotel||4|
|Washakie||Powder River Pass Snotel||8|
|Johnson||Cloud Peak Reservoir Snotel||4|
|Bear Trap Meadow Snotel||4|
|Little Goose Snotel||1|