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September 2011 General Discussion/Obs


Chicago Storm

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This, plus if you are unsure you can always ask someone, we would be more than happy to explain stuff if need be.

Thanks guys!

I have a pretty good understanding of atmospheric stuff at the basic (intro met) level. i.e. 70F lake water with 50F air overhead = condensation/precip. It's really just that the entire concept of lake-effect anything is new to me so I forget to think about it. If I was diligently forecasting on a regular basis I would probably remember the lake was there, haha.

That said, LOT's point-and-click has a low of 40 Friday morning. Originally I was thinking 40 also, but now I'm thinking more like 45-ish here because of said effects? The west side of Chicagoland could drop into the 30s though.

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Thanks guys!

I have a pretty good understanding of atmospheric stuff at the basic (intro met) level. i.e. 70F lake water with 50F air overhead = condensation/precip. It's really just that the entire concept of lake-effect anything is new to me so I forget to think about it. If I was diligently forecasting on a regular basis I would probably remember the lake was there, haha.

That said, LOT's point-and-click has a low of 40 Friday morning. Originally I was thinking 40 also, but now I'm thinking more like 45-ish here because of said effects? The west side of Chicagoland could drop into the 30s though.

Onshore flow doesn't look that strong. I think Valpo could be far enough inland to avoid most of the effects but I guess we'll have to wait and see.

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Both the GFS and ECMWF have been relatively consistent with keeping a broad area of H5 ridging across the entrie width of the US and southern Canada for the forseeable future. 0z GFS kinda threw us a bone and tries to really dig, and eventually close off, a shortwave around D6-7 through the Lakes. However, in general, this pattern is not conducive for active weather.

I believe dry autumns are common during Ninas or when a transition to a Nina is taking place? I guess there's nothing wrong with saving the good stuff 'til later in the fall when it can actually do some damage. At least my local climo certainly suggests that dry, warmish Seps/Octs are harbingers to cold and snowy winters.

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PUBLIC INFORMATION STATEMENT

NATIONAL WEATHER SERVICE DULUTH MN

622 AM CDT THU SEP 15 2011

...OVERNIGHT TEMPERATURES REACH THE TEENS AT EMBARRASS...

THE OVERNIGHT LOW IN EMBARRASS MINNESOTA SO FAR THIS MORNING WAS 19.

Looks like International Falls may have hit 19 as well? Would be the first time they've reached the teens in September...either way, their coldest temperature this early on record.

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Looks like International Falls may have hit 19 as well? Would be the first time they've reached the teens in September...either way, their coldest temperature this early on record.

Correct, they did hit 19. That's amazing to have their first Sept. temp in the teens occur on the 15th!! Honestly, this is one of the most incredible cold temp records I can think of. I think there's a thread about it on the main forum too.

Per Don S.: The previous earliest <20°F temperature was 17° set on October 2, 1974.

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Correct, they did hit 19. That's amazing to have their first Sept. temp in the teens occur on the 15th!! Honestly, this is one of the most incredible cold temp records I can think of. I think there's a thread about it on the main forum too.

Per Don S.: The previous earliest <20°F temperature was 17° set on October 2, 1974.

yep, total beat down of that record.

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Lake Huron lake effect machine is whipping into form rather early this season. Lake effect rain showers have been falling most of the morning. Most of SE Michigan is sunny, as is Toronto. We get peaks of sun, usually followed within 30 minutes by more rain. Kind of cool to see the precip. form over the lake and come inland on the N or NW winds. Give it a couple more months and it will be white not wet.

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A little humor from CLE in the AFD. After 3"+ already this month, and almost 45" YTD, we could use a break from the rain. Hopefully the abundance of rain will make for good leaf color this year.

LONG TERM /FRIDAY THROUGH SUNDAY/...

STILL FEEL THERE IS A SLIGHT RISK THAT A SHRA COULD STILL BE IN THE SNOWBELT PART OF THE AREA AROUND DAYBREAK FRI...OTHERWISE HIGH

PRESSURE AND DRY WEATHER SHOULD DOMINATE FRI THROUGH SUN BASED ON LATEST MODELS RUNS. HOWEVER...BASED ON THE PATTERN SO FAR THIS YEAR...TO EXPECT TO HAVE THREE DRY DAYS IN A ROW SEEMS TO BE JUST TOO MUCH OF A STRETCH SO AM EXPECTING TO SEE MODELS CHANGE BEFORE NEXT WEEKEND. BELOW NORMAL TEMPS FRI WILL MODERATE CLOSER TO NORMAL BY SUN. &&

Almost another inch here (0.93" IMBY) overnight. The yearlong deluge continues. With CLE now at 4.06" for the month, this will likely be another top 10 wettest month (alongside April, May, July, August) The yearly total of 45.73" is 18.33" above normal. This is already the 8th wettest year on record. We only need 8.10" to fall over the next 3.5 months to break the record for the wettest year on record. A typical year would see 11.69" fall between now and the end of the year, so even if we slip into an extended dry pattern, the record looks like a safe bet.

This longevity of this wet spell has been mighty impressive. Just imagine if this had occurred during the winter months with each month being a top ten snowiest with 2 of them being the snowiest. This is easily the equivalent of a 140" snowfall season for Cleveland.

Now is the time to start watching lake temps as we get into fall. Right now they appear to be running 1-2 degrees colder than normal, despite a warmer than average summer. I think the heavy wind action has allowed for some mixing of the surface temps.

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