Sunday Briefing: Severe Weather Potential for Monday

Good afternoon! Let's cut to the chase, shall we?

A hazardous weather outlook was issued Sunday, October 22, 2017 at 4:47 am EST by the GSP NWS office:

DAY ONE...Today and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

..Monday...Severe weather possible. Strong to severe thunderstorms
may develop ahead of an approaching cold front and upper level
disturbance Monday afternoon and evening. Damaging wind gusts and an
isolated tornado will be possible with any thunderstorms that
develop. Locally heavy rainfall will be possible as well, especially
near the mountains.
..Tuesday...No hazardous weather is expected at this time.
Graphic generated by the NWS WPC for Monday, October 23rd, 2017

Graphic generated by the NWS WPC for Monday, October 23rd, 2017

On a synoptic timescale what is happening this week is that starting late tonight on through Wedensday we will have a one-two punch with two tightly connected cold fronts, both associated with the same digging (strengthening) to mature (strong) trough. Ahead of the first cold front is where all of the action is as a copious amount of moisture, frontal lift, and wind shear make the right cocktail for a late October severe weather event. How severe is severe? Heavy rains and thus flash flooding is definitely a major concern of ours at this point, but we do see potential for damaging storm associated gusts and a slight chance for an isolated tornado in the region. Our team is on the ready to keep you up to date and well warned of whatever comes our way. If you don't have our app it's free in the Apple store and on Google Play. Search Foothills Weather Network, we're the first option, select download and get access to all of our website content as well as receive push notifications that update you on whatever warnings or watches we issue as we issue them.

Here are a couple of extra graphics showing some rain totals:

 

Precipitation chances drop on Tuesday as the second of the two cold fronts come in bringing in the full brisk swing of fall mountain weather. Tuesday night into Wednesday have temperatures hovering just at 40 degrees with Wednesday's high peaking out in the upper 50's. Wednesday night is another night in the upper 30's so we could see some patchy frost at that time. As of Thursday we will be gradually increasing the temperatures on the highs and lows by a couple of degrees as mainly zonal flow and mostly sunny conditions dominates the Thursday through Saturday forecast. Late Saturday we have another well developed trough moving into the area for the weekend and early part of the work week. For now we can assume there will be some rain and possibly the coldest temperatures of the month associated with the event, but it's too soon to guess the full impacts just yet. 

Here's to another week! Thanks for reading! 

Sinead Lockhart

FWN, Meteorologist