Alberto is Still on His Way!

Full Moon hidden by clouds

Full Moon dancing in the clouds as Thunder & Lightning ricocheted all around. Picture taken 19 June 24, 9:00pm (Click on title of post to see image)

Thursday – 20 June 2024 – 12:45pm

Alberto is in northern Mexico with his moisture streaming our way!

Our dewpoint at the airfield increased from 29 degrees yesterday morning to 50 degrees this morning! The moisture is in place to kick off thunderstorms this afternoon into the early morning hours! The deep tropical moisture that is the remnants of Tropical Storm Alberto, will advect into our area later tonight.

Alberto’s two day rain event of Thursday and Friday is sponsored by The Springs Resort!

A BIG thanks to the Springs Resort for sponsoring this soaking!

The past…

At Stevens Field the high temperature yesterday afternoon was 81. The low this morning was 57. Some cool spots dipped to 50.

The peak wind at Stevens Field around 9pm associated with thunderstorms was 35mph.

Average HighRecord High / YearAverage LowRecord Low / Year
8092/19893828 / 1973

Precipitation summary… A band of rainshowers and thunderstorms moved through the area last night from 6:00pm to around 10:00pm. The east side of the county saw a few heavy showers. Leo was the rain lottery winner (again) with .22″.

CoCoRaHS 20 June 24
CoCoRaHS summary report for 19 Jun 24 to 20 Jun 24 at 9am.

Forecast discussion…

Satellite

Satellite 20 Jun noon
Satellite, Jun 20th, 2024, Noon

An area of high pressure is in place from the southern plains into the northeast. At the same time an upper level trough is draped across central California and is moving southeast. That is making a squeeze play with Alberto and we’re in the middle.

Tropical Storm Alberto is now in northern Mexico and his moisture is moving clockwise around the area of high pressure and moving to the northwest and towards southwest Colorado. It has to cross New Mexico yet. But moist air has been advecting in for the last 24 hours.

Radar:

Radar 20 June 24 11am 1
This is the big picture showing the large area of rain and moisture moving in from the southeast. It has to make it’s way across New Mexico yet. Valid: 20 Jun 24, 11:00am

Radar 20 June 24 1240
In the last hour & 40 minutes thunder storms have popped up across the county and are moving from the southwest to the northeast.

Forecast highlights…

*** Good soaking today till early Saturday. ***

*** Chance of localized flooding in low lying areas or areas prone to flooding today and tomorrow***

*** Drier Saturday through Tuesday with Afternoon Thunderstorms.

Today through Saturday morning… All the players are in place for a decent soaking! This is a lot of moisture for this time of year and is a system more like what we could expect at the end of July!

Tropical Storm Alberto is in northern Mexico and his moisture is moving clockwise around the area of high pressure and moving to the northwest and towards southwest Colorado.

Today will be Mostly Cloudy to Cloudy. Moisture will continue to pack in and Friday will be Cloudy with lower clouds. Expect isolated thunderstorms in the early afternoon hours and increasing in coverage throughout the afternoon today. We’ll see more of a steady rain event on Friday with isolated thunderstorms. With the thunderstorms over the two day period expect heavy rain at times, small hail, and very gusty winds associated with outflow from the storms.

hrrr subh colorado refc 1718899200 1718911800 1718964000 10 1
HRRR model forecasted radar loop valid from today at 1:30pm to Friday, Jun 21st at 4:00am.
WPC Precip 20 June 24
The models are finally coming together with precipitation numbers as this event gets closer. However, they have not been verifying. These numbers need to be cut by at least 30%. I think we’ll get 1 to 1.5″ of precip – still more than June’s average precipitation in 48 hours! The WPC is a “forecaster in the loop” product and it is showing 2.48″ by 6am on Saturday as compared to NBM: 1.83     Euro: 2.52”     GFS: 2.30”     Canadian: 1.89” HRRR: 1.67

With this much expected rain, chance of localized flooding in low lying areas or areas prone to flooding is a real concern. WPC has highlighted areas of possible flooding in our area for today and tomorrow.

excessive rain Day 1 20 Jun
There is a Slight or 15% risk of excessive rainfall in our area today.
excessive rain Day 2 21 Jun
There is a Slight or 15% risk of excessive rainfall in our area on Friday.

Cooler air associated with an upper level trough is moving in from the northwest. This is helping to destabilize the atmosphere. Cape, a measure of instability, will be well above what we need for showers and thunderstorms. The Cape values for thunderstorms are the highest around 7pm today.

Cape 20 Jun 19L
HRRR Cape indices for thunderstorms are high from noon to 7pm today. Highest numbers (1151) around 7pm on Thursday. Numbers are marginal on Friday.

Winds… Afternoon gusts will mostly be 15-20mph. Isolated stronger gusts are possible near showers and thunderstorms.

Temps… Highs will be in the lo-70s to mid-70s on Thursday and only upper 60s to low-70s on Friday and lows will be in the mid-40s to low 50s.

Saturday through Tuesday

The upper level trough will move through our area late Friday night and very early Saturday morning. High pressure and drier air will move in. Skies will be Partly Cloudy. However, there will still be enough residual moisture left to kick off isolated thunderstorms each afternoon. Expect Mostly Cloudy skies in the afternoon with those thunderstorms.

Winds… Afternoon gusts will mostly be 15-20mph. Isolated stronger gusts are possible near showers and thunderstorms.

Temps… Will increase each day. Saturday will in the upper 70s to lo 80s. By Tueday it will be in the lo 80s to near 90. Lows will be in the upper 40s to lo 50s.

Huge thanks, again, to The Springs Resort for sponsoring our two day storm!

If we see something significant, we’ll make a quick post. Otherwise, I’ll have another post out tomorrow morning.

– Arleen

Pagosa Weather Blizzard Level Sponsor

Pagosa Weather Storm Sponsor

Picture of Arleen Pro

Arleen Pro

I grew up in Montana where my love of the mountains is rooted. I served in the Air Force, forecasting aviation weather, for 24 years. I had eight assignments and my favorites were Colorado, Alaska, Korea, and Germany. I deployed several times, including to Iraq and Afghanistan. After RV traveling for nine years, Shawn and I found paradise in Pagosa. Here we enjoy playing outside in the spectacular San Juan mountains!

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