Absolute Vorticity

Looks like ILN right on cue went with Frost Advisory for all but the Columbus area and Scioto valley for tonight.

Cool Mike! Make sense to me as long as the winds relax. Here's a portion of the advisory for those who are interested:

...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM EDT
WEDNESDAY...

* WHAT...Temperatures as low as 33 will result in frost
formation.

* WHERE...Portions of East Central and Southeast Indiana,
Northeast and Northern Kentucky and Central, South Central,
Southwest and West Central Ohio.

* WHEN...From midnight tonight to 10 AM EDT Wednesday.

We're not the only ones under a frost advisory for the first time this season.

Dewpoint of 34 here. Even with no frost advisory, my guess is some will be seen nearby.

57 for my high today, down to 49 already. CVG hit 57 also today, down to 51 per the 7pm reading.

Currently 41 here in Greenville and progged for around 34 on Wed morning.

young pup wrote: ↑Tue Oct 26, 2021 6:42 pm Dewpoint of 34 here. Even with no frost advisory, my guess is some will be seen nearby.

The town that comes to mind is Lancaster - always a cold spot. Similar to Hamilton - both in valleys with the dense cold funneling in there at night.

Good Morning and so far still above 40 at CVG. Still a couple more hours to get temps in the upper 30's. The winds stayed up last night so the temp could only go down so far plus we switch winds quickly from the northeast to east which is an indicator that the next system is gearing up and moving this way so by later today those winds should be out of the southeast. More later as I look at info from overnight

I am at 34 at my house. Holding pretty steady there so I don't see getting much lower but, what a cold morning for October!

37 here last time I checked. E wind hurt us down here for sure. HAO had 31 last time I looked and 34 at LUK. A nice day today then we get wet for 3 days followed by a decent Halloween.

39 now at CVG which ties for the coolest morning of the Fall so far officially. 37 still for me and that beats 38 that I've had twice so far imby. Once the sun starts to come up, then we'll be able to see who got frost and who didn't. Away from the city, I imagine a lot of you will.

I have no changes to the forecast for the rest of Rocktober so for those who regularly are on here either posting or just reading, you know the drill. To summarize in case anyone hasn't seen it yet:

Rain moves in Thurs in that 10-1pm range across the area. On and off rain continues thru Sat afternoon and evening. Halloween is dry. At least an inch of rain can be expected, some will see more. Winds at times will gust in that 20-30 mph also. No severe wx or damaging winds are expected and I don't expect any flash flooding either. If leaves clog a storm drain or something, that's about the only hazard I see, but that's normal in the fall anyway to be on the look out for that.

For temps... U50s today, maybe 60 if we're lucky. U40s to the mid 50s Thurs - Sat with highs around 60 or so on Halloween.

Your Halloween forecast: Dry with temps falling thru the 50s for Trick-or-treat time. Not too bad honestly for the kiddos.

Looks like HAO hit 30! It was 32 in my hood....I live in a cold valley as well. Frost on the rooftops here.

Frost on the roof tops / car tops here but I didn't get cold enough for the grass to get frosted. UGH...

30 when I left the house

BG Blog: https://www.wave3.com/2021/10/27/goode- ... blog-1027/

cloudy72 wrote: ↑Tue Oct 26, 2021 8:58 pm

young pup wrote: ↑Tue Oct 26, 2021 6:42 pm Dewpoint of 34 here. Even with no frost advisory, my guess is some will be seen nearby.

The town that comes to mind is Lancaster - always a cold spot. Similar to Hamilton - both in valleys with the dense cold funneling in there at night.

I was thinking down around there myself. Chillicothe was my pick.

young pup wrote: ↑Wed Oct 27, 2021 8:18 am

cloudy72 wrote: ↑Tue Oct 26, 2021 8:58 pm

young pup wrote: ↑Tue Oct 26, 2021 6:42 pm Dewpoint of 34 here. Even with no frost advisory, my guess is some will be seen nearby.

The town that comes to mind is Lancaster - always a cold spot. Similar to Hamilton - both in valleys with the dense cold funneling in there at night.

I was thinking down around there myself. Chillicothe was my pick.

Yes it gets cold there as well - must have had clouds down that way (or a light breeze) as Lancaster was at 45.

Good Morning and yes there is some frost especially away from the house and I saw some cars in the neighborhood that the thin layer of ice on the windshield. Doubt if its a killing frost but hopefully this will keep the grass from growing like its mid-May.

30 degrees in Maineville/Morrow are...beautiful frost on the grass and rooftops. Hopefully it killed some bugs as well...

30 looks to be the coldest reading I can find. Was wondering if a rural valley got into the U20s or not?

Hey Les - according to the IES site, the coldest I saw in Ohio was 30 at Hamilton and also Wright-Patt AFB.

In Indiana, I saw a 29 at Goshen.

cloudy72 wrote: ↑Wed Oct 27, 2021 1:22 pm Hey Les - according to the IES site, the coldest I saw in Ohio was 30 at Hamilton and also Wright-Patt AFB.

In Indiana, I saw a 29 at Goshen.

Thanks Mike! I figured there had to be a 20 degree reading some place.

Finally got the grass mowed and the leaves ground up. Ready for the next 3 days of rain / wind to bring more leaves down. I think the forecast for the rest of Rocktober is well in hand and I don't have much more to add. Hope all enjoyed the nice day today to get anything done outside that needed to be done.

From this morning CVG and CMH got down to 38 and DAY to 32.