Posted on 10/25/2010 5:05:09 PM PDT by FromLori
The National Weather Service has upgraded the high wind watch to a high wind warning which runs from 7 a.m. Tuesday-7 p.m. Wednesday. It appears we could establish a new record for the lowest October barometric pressure in this storm. Models put Chicago's barometric pressure at 29.05" Tuesday morning. If true, this would break the old October record low of 29.11" set Oct. 19, 1937, Oct. 19, 1947 and Oct. 24, 1959.
The storm's minimum central pressure of 960 millibars (28.35") Tuesday in northern Minnesota is below the 980-millibar reading in the Edmund Fitzgerald storm on Lake Superior in Nov. 1975. It's the equivalent of a Category 3 hurricane.
The curl visible off the West Coast on this CIMSS UW-Madison satellite time lapse in riding an extraordinary 220 mph speed maximum in the jet stream will become the storm expected to explode as it rides across the Dakotas and Minnesota Tuesday.
Wind gusts could reach mid-60s
Frank Wachowski of the National Weather Service reports Chicago's strongest October wind was 70 mph recorded Oct 28, 1892. Model wind profiles put sustained winds 2,000 feet above local terrain here at 63 mph by Tuesday afternoon. Subsidence in the region of the storm under which Chicago will be positioned after the passage of a squall line early in the day (6-9 a.m.) threatens to bring these winds down to the surface as damaging non-thunderstorm wind gusts.
Check out this animation of the spin-up of Tuesday's mega-low in the nation's mid-section. This is a time-lapse of the National Weather Service's high resolution GFS model. It puts the storm's minimum pressure at 957.5 millibars which translates to 28.28".
And the gales of November come early...
hoo boy
Winds in the mid 60’s doesn’t begin to be a Cat 3 hurricane ... what am I missing?
The storm’s minimum central pressure of 960 millibars (28.35”) Tuesday in northern Minnesota is below the 980-millibar reading in the Edmund Fitzgerald storm on Lake Superior in Nov. 1975. It’s the equivalent of a Category 3 hurricane.
It’s pretty much dead calm here in the Twin Cities.....but they say that we’re in for a whuppin’ tomorrow. They are already predicting widespread massive power outages.....
Cat 1 is 74 - 95 mph (I’m a Floridian, I should know, LOL.)
Tomorrow morning for us. My weatherbug says gusts to 60mph.
At least I won’t have to rake the leaves.
Dave Dahl? lol I am in W. WI and it’s quiet here right now too but we get the Twin Cities news as well as the local stations out of Eau Claire, etc. and they are giving the same warnings about power, tree’s so forth
Pressure on my wx station now is 29.112”
It's going to pick up pretty good. I've secured my yard, how about you? I've got two dead elms that I don't think will make it though.
We’ve got it here in MI too. It’s gonna be a rough ride, esp. along the Lake MI shore tomorrow and Wed. I lost most of my dead trees already this year. It’s the healthy ones close to my house I’m worried about.
Roger that.
The Saffir-Simpson scale is based on sustained surface wind speed, not minimum central pressure.
Great Lakes surfing? I would like to see some webcams of the shoreline....
954 mb this evening in Antartica. http://meteoarmada.directemar.cl/prontus_meteo/site/artic/20101025/imag/FOTO_MIX_RESULT20101025165238.jpg
Lowest I saw this past S. American winter was 926 mb.
I’m looking forward to this. Might be great sailing weather.
I’m so glad you said that old age I guess I for some reason didn’t even think of that thanks I’ll have to go do that.
Our infamous wind turbines in NW Indiana should be on turbo.
I’ve got one big ole poplar tree that concerns me but with the leaves gone it doesn’t have a lot of wind resistance. I learned my lesson about cutting them down immediately if they die after waking up with one in my bedroom.
After that I had 7 trees cut out of the yard all at once. I left the big maples on the leeward side of the house.
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