The record heat wave going on across the West will ease across many locations for the holiday weekend. However, the relief is only temporary as another round of extreme heat is expected by early next week.
The large bubble of hot air that was in place across the West was shunted to the south Friday as a dip in the jet stream moved into the Pacific Northwest.
Temperatures began to ease Thursday across the Pacific Northwest as a dip in the jet stream moved onshore. Temperatures Thursday afternoon in Pendleton, Ore., and Boise, Idaho, rose into the low to middle 90s, a far cry from the 100s of earlier in the week.
More relief will come Saturday for California, Arizona and Nevada with temperatures more than 10 degrees cooler than they were on Wednesday and Thursday.
It will remain quite hot across Phoenix, Las Vegas and Death Valley right through the weekend, but temperatures will at least revert to more typical values instead of these extreme, near-record highs.
Instead of highs over 110 degrees for Phoenix and Las Vegas, afternoon highs on Saturday and Sunday will be more normal, near 105 degrees.
Across the Intermountain West, moisture is becoming more widespread for this holiday weekend as the heat wave breaks down. This will lead to elevated chances for afternoon and evening thunderstorms from El Paso to Flagstaff and Albuquerque through Grand Junction and Salt Lake City.
This increase in moisture could lead to locally heavy downpours, and with a very dry soil in place across the West, any downpours could lead to flash flooding across the interior West.
Arroyos and dry streams could easily turn into raging rivers from any of the afternoon thunderstorms through this weekend.
For more information and to check out the latest flooding or heat-related watches or warnings, click over to the AccuWeather.com Severe Weather Center.
The relief from the extreme heat won't last all that long as AccuWeather.com meteorologists track another round of above-normal heat which is expected to expand across the West by early next week.
While temperatures aren't expected to be quite as extreme as the start of July, highs will rise toward 110 degrees Monday and Tuesday for Phoenix and Las Vegas.
Unlike the last heat wave, which was confined to the western half of the country, this next round of heat early next week could stretch all the way through the East and Gulf Coast regions.
Today at 10:00 a.m. EST, we'll discuss how much snow you can expect with the quick-hitting storm in the Northeast.
Snow has begun to move into the Northeast, impacting the I-95 corridor.
Philadelphia International Airport received more snow (8.6 inches) from a single storm this past Sunday than it did all of last winter, when 8.3 inches fell.
While many may dream of a white Christmas, the reality of one may not be favorable, depending on one's geographical location during the holidays.
Yet another blast of Arctic air will roll southeastward this week over the Midwest and will reach the Northeast.
A snowstorm continues to race across the I-95 Northeast Tuesday sparking travel delays, right on the heels of this past weekend's winter storm.
Madison, WI (1970)
16.0" snow, greatest 24 hour snowfall for city (10th-14th).
Bend, OR (1919)
28" snowfall set state 24 hour mark.
Baltimore City (1878)
28.73" barometric pressure - Dec. record.