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August 2016 General Discussion


Powerball

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Wow, the 12z NAM has much less rainfall for most of OH than the GFS does, inside 48 hrs (48 hr total.) The NAM has 0.1" Columbus, 0.2" Cleveland. I wonder which will be right. Obviously this has implications for drought relief, and the possibility of localized flash floods.

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6 hours ago, Chinook said:

Wow, the 12z NAM has much less rainfall for most of OH than the GFS does, inside 48 hrs (48 hr total.) The NAM has 0.1" Columbus, 0.2" Cleveland. I wonder which will be right. Obviously this has implications for drought relief, and the possibility of localized flash floods.

It could be one of those situations where the heavy rain won't be widespread, but the areas that luck up under the pop-up t'storms get a nice dosing of it.

A Hi-Res model like the NAM would obviously be able to depict this outcome better than the low-resolution GFS. 

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3 hours ago, A-L-E-K said:

So about dat funnel 

You mean this funnel?

 

KMDW 092153Z 22006KT 10SM FEW060 SCT200 SCT250 32/16 A2997 RMK FUNNEL CLOUD E2058 AO2 SLP136 T03170156
KMDW 092059Z COR 24007KT 10SM FEW060 BKN200 BKN250 32/16 A2998 RMK FUNNEL CLOUD E58 AO2 T03170161
KMDW 092053Z 24008KT 10SM FC BKN055 BKN200 BKN250 32/16 A2998 RMK FUNNEL CLOUD B49 5 NE AO2 SLP140 T03170161 58008
KMDW 092050Z 23007KT 10SM FC BKN055 BKN200 BKN250 32/16 A2998 RMK FUNNEL CLOUD B49 5 NE AO2

 

I don't think there was anything around then...

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20 minutes ago, Stebo said:

You mean this funnel?

 

KMDW 092153Z 22006KT 10SM FEW060 SCT200 SCT250 32/16 A2997 RMK FUNNEL CLOUD E2058 AO2 SLP136 T03170156
KMDW 092059Z COR 24007KT 10SM FEW060 BKN200 BKN250 32/16 A2998 RMK FUNNEL CLOUD E58 AO2 T03170161
KMDW 092053Z 24008KT 10SM FC BKN055 BKN200 BKN250 32/16 A2998 RMK FUNNEL CLOUD B49 5 NE AO2 SLP140 T03170161 58008
KMDW 092050Z 23007KT 10SM FC BKN055 BKN200 BKN250 32/16 A2998 RMK FUNNEL CLOUD B49 5 NE AO2

 

I don't think there was anything around then...

 

Yeah that's probably erroneous.  Initially wondered if maybe it was something over the lake but the 5 miles northeast in the ob is a point that is still over land. 

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Well hell, it's actually legit.  How about that? 

PRELIMINARY LOCAL STORM REPORT  

NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  

852 PM CDT TUE AUG 09 2016      

.TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON      

.DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.    

..REMARKS..    

0348 PM TORNADO 3 E BERWYN 41.85N 87.74W  

08/09/2016 COOK IL OTHER FEDERAL    

FAA CONTRACT OBSERVER FOR MIDWAY AIRPORT SPOTTED A   LANDSPOUT TORNADO THAT HAD FORMED ON THE LAKE BREEZE. THE   TORNADO DISSIPATED AT 358 PM CDT. LOCATION IS APPROXIMATE   BASED OFF PHOTOS TAKEN BY THE OBSERVER AND OTHER PHOTOS   POSTED TO SOCIAL MEDIA...JUST NORTHEAST OF THE   INTERSECTION OF OGDEN AND CICERO AVENUES. NO DAMAGE HAS   BEEN REPORTED. THIS IS THE FIRST TORNADO WITHIN THE CITY   LIMITS OF CHICAGO SINCE A BRIEF F-0 ON THE LOYOLA   UNIVERSITY CAMPUS ON SEPTEMBER 22 2006.  


 
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Pretty cool how the weather can throw a surprise curveball every now and then.  FWIW, I did some research into Chicago tornadoes some years ago and the ones I found were of the traditional thunderstorm type, so this particular occurrence is probably a first of its kind (at least documented) in the Chicago city limits.  

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Pretty cool how the weather can throw a surprise curveball every now and then.  FWIW, I did some research into Chicago tornadoes some years ago and the ones I found were of the traditional thunderstorm type, so this particular occurrence is probably a first of its kind (at least documented) in the Chicago city limits.  

That was exactly our thoughts. Still amazed it happened. We were completely caught off guard when the observer reported FC in the METAR because would never have expected a landspout to occur in that environment.

Some incredible photos surfaced from Willis Tower:

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10 hours ago, Stebo said:

Yeah, still shows you how strong of pattern we are in that even a day where it is partly to mostly cloudy still gets 90.

Temp profiles support 4 more 90*F+ days, but that's obviously going to depend on the extent of cloud debris / convection.

This is looking like the dirtiest ridge we've seen all season, so there will probably be better chances for rainfall to affect high temps.

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6 hours ago, RCNYILWX said:

That was exactly our thoughts. Still amazed it happened. We were completely caught off guard when the observer reported FC in the METAR because would never have expected a landspout to occur in that environment.

Some incredible photos surfaced from Willis Tower:

Awesome pic! Was doing some research on landspouts and found out that some strong ones can do EF2-EF3 type damage? Is that legitimate?

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9 hours ago, RCNYILWX said:

That was exactly our thoughts. Still amazed it happened. We were completely caught off guard when the observer reported FC in the METAR because would never have expected a landspout to occur in that environment.

Some incredible photos surfaced from Willis Tower:

Nice pics.  I noticed you guys don't have a path length in the LSR.  Was it basically stationary?

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Nice pics.  I noticed you guys don't have a path length in the LSR.  Was it basically stationary?



We don't have anything else to go by other than the photos and no damage reports yet. It did appear nearly stationary from the video taken by a motorist on I-55 posted as a comment on the Illinois Storm Chasers Facebook page.
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Sweet pics on the landspout. Crazy how that happened.

Flash Flood Watch for tonight into tomorrow. 2-3" per hour expected with some spots receiving up to 6" totals. MN as a whole had the 3rd wettest July ever and now August is following suit. The grass never even browned up here this summer. I doubt it's going to at this point. Insane rains the last few months. 

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