Chinook

There is a tornado warned storm east of Lacrosse, WI. It spun up out of a blob-like multicell cluster. Tomorrow: models have some impressive supercell and tornado indices out ahead of a potential squall line in Minnesota and Wisconsin.

The NWS says 100-101 degrees for Thursday and Friday for the northern Colorado metro areas. It should be at least this hot for SE Colorado (Arkansas River Valley).

Last night, a thunderstorm occurred here at sunset. It was a small storm, that made the rainy western sky look totally orange, with a few lightning bolts. Here is a storm from a few minutes ago that left a circular outflow boundary, evident in radar and visible satellite

July 1

July 5 lightning bolt (look at the bright spot in the cloud on #1) July 5th nighttime

July 4th

July 4th

July 3

July 2 looking southwest

July 2 looking northeast

June 27 lenticular cloud edge

June 20 looking southwest. This is the same day and same time as I took the picture of the shelf cloud type thing

Denver has had 1" hail yesterday and today, at 6pm-8pm. Right now, severe-warned hailstorms from Denver to Longmont. Yesterday I got a pic of some of the mammatus clouds at 8:30, and a video of some lightning. Storms developed in a NE-SW line near Denver yesterday, and one storm tracked straight northward to Fort Collins and Cheyenne. I only got a trace of rain, or a bit more. When the storm was gone, and the sun had set, I watched the Loveland city fireworks to the SSE. And even then, I saw distant lightning behind the fireworks. Radar showed the rain was close to Denver. Edit: more thunder and rain within about 1 mile of downtown Loveland Edit: Tonight, the storm expanded northwards, much like last night. My place got 0.10" to 0.15" I think, with small hail. I narrowly avoided large hail again. Hail reports in Loveland and Fort Collins.

Today, we have had dew points up to 55-60F and normal warmth. Dew points this high are indicative of mid-summer and heavy rain, maybe indicative of the SW Monsoon season. Then we have had numerous thunderstorms in Larimer and Boulder County, southern side of Denver (Littleton). My place hasn't gotten much rain yet.

Severe thunderstorm warning for SE Wisconsin. Most areas in the squall line have had winds of 40-50mph so far.

That's a great picture! Today, Fort Collins was at about 90, with the CSU thermometer at 89.7 degrees, (probably 90 or 91 will go in the record book, with analog thermometer). We have had no temps at or above 89 before today. This will be the latest in the season that Fort Collins reached 89 in any of the years I have been here. In 2009, Fort Collins was 89 in May and then only got to 89 as a maximum temperature for June 2009. In the time period of 2007-2018, the month of June has been at least +1.0F above normal, 9 out of 12 times. This past weekend was dreary, with a very unusual 50's and low 60's on Friday and Saturday, with some rain, and some partly cloudy skies with upper 60's on Sunday. The official high temperature was 64 on Saturday (6/22) which was the coolest June 22nd high temperature since 6/22/1948 and 6/22/1947, which had 64 and 59.

Midnight- these high-reflectivity storms in SW Iowa must be dumping rain and hail. I bet the lightning is impressive, considering that lightning is so easy to see at nighttime.

I could see some nice small lenticular clouds this morning. From the satellite image, it looks like there was a wide lenticular cloud around Boulder. The mountains look white again. Normally the satellite image would show more gray above timberline.

Tornado at Charleston! Tornadoes reported near RLX radar and about 3-4 miles SE of Charleston. This area has some steep hills on either side of the Kanawha River.

Some of the convection-allowing models show heavier storms in Cincinnati and Columbus tomorrow. The Ohio Valley area should have over 40 kt winds at 500mb, and convection should develop in some areas in OH and KY.

I did a little bit of storm chasing after taking a picture of a towering cloud (vertical picture) towering cloud low clouds radar (6/20, severe hail in Fort Collins. Low cloud pictures above are my view of this from the south, on State Highway 392 (road to Windsor) west of I-25 radar from today (6/21) . A storm developed rotation and large hail southeast of Denver

SPC is continuing with the 15% wind and 15% hail over a broad region of the Midwest, as well as some 2% tornado areas. It is almost identical to the previous 17z outlook (Day 2).

There is a lot of model agreement on a fast-moving squall line continuing overnight, moving into northern Missouri and western Illinois in the mid-day hours, 16z to 18z. Models have varying solutions after 20z but the squall line may make it into Indiana. I am wondering if things will work out to have a lot of wind reports in the hours before noon CDT. This is the HRRR model for 14z. Surely this would be quite unusual to have have so many 70dBz storm cores at 14z.

Here is a map of the storm reports, up to 647pm eastern. There is one report of 3 waterspouts. Obviously this is a notable severe weather day for this area.

Lots of scattered thunderstorms affected eastern Colorado and eastern New Mexico today, including the southeast Denver area. I heard there was a hail-soaked parking lot at NCAR (Valmont Drive, Boulder)