Chicago WX Posted April 29, 2014 Share Posted April 29, 2014 Brief period of marble size hail here at my place with the cells moving through LAF. EDIT: also a TOR in central IL right now. Link to comment Share on other sites More sharing options...
vortex Posted April 29, 2014 Share Posted April 29, 2014 Had some .25 inch to .50 inch size hail here. Lasted a few minutes. Link to comment Share on other sites More sharing options...
RCNYILWX Posted April 29, 2014 Share Posted April 29, 2014 There was a train derailment in Laura IL, between GBG and PIA just north of I-72. ~25 cars blown off the tracks which caused a bunch of power poles and lines to come down. Also there was a semi blown off of I-39 near Minonk, which is near where the Washington tornado crossed the interstate. Sent from my SCH-I535 using Tapatalk Link to comment Share on other sites More sharing options...
Thunder Road Posted April 29, 2014 Share Posted April 29, 2014 We left Valpo at 9:30 this morning, went to CMI, cut west and pulled off for a while between SPG and Jacksoville. We then moved south and intercepted the one dominant cell moving out of the northern suburbs of St. Louis just as it became TOR-warned, and stayed on it all the way to Mattoon as it congealed into the line of storms to its north, but maintained supercell structure. In my naivety, I just assumed everything between I-70 and I-80 in IL was outwash plain, but that was some pretty terrible terrain down there. We only got occasional glimpses at the base, but did see some broad rotation at one point, lots of rising scud, and perhaps a brief wall cloud. Farther east once it had congealed, we got this look at it (below). It was pretty cool to see an entire supercell structure contained within a bigger complex. We essentially had a horizon-to-horizon shelf cloud with a supercell embedded in the middle. So overall a pretty good chase, terrain excluded, despite no tornado. Link to comment Share on other sites More sharing options...
nwohweather Posted April 29, 2014 Share Posted April 29, 2014 Severe storm parameters may get interesting tomorrow afternoon if it warms up to about 70F at IN/OH/MI borders. The NAM forecast sounding shows 10C/km lapse rate and 50 kt at 700mb tomorrow. That's about a 30kt difference between the surface and 700mb. Already 63 and sunny Link to comment Share on other sites More sharing options...
Chargers09 Posted April 29, 2014 Share Posted April 29, 2014 Clearing nicely. Destabilization looking probable. Link to comment Share on other sites More sharing options...
hm8 Posted April 29, 2014 Share Posted April 29, 2014 Clearing nicely. Destabilization looking probable. The instability will mostly come from cold pool advection aloft rather than heating below... So for once cloud debris aren't something we need to worry about much (so of course they clear nicely this time) Link to comment Share on other sites More sharing options...
Powerball Posted April 29, 2014 Share Posted April 29, 2014 RAP looks real nice (relatively speaking) for Detroit late this afternoon. Things could get busy for rush hour. The shortwave in question show up nicely on the satellite too, along with the massive dry slot... Link to comment Share on other sites More sharing options...
Chargers09 Posted April 29, 2014 Share Posted April 29, 2014 The instability will mostly come from cold pool advection aloft rather than heating below... So for once cloud debris aren't something we need to worry about much (so of course they clear nicely this time)Could the sun enhance things, though? Link to comment Share on other sites More sharing options...
Boogieman Posted April 29, 2014 Share Posted April 29, 2014 Thus far, still cloudy at FNT but the radar echos have all moved to the northeast, putting us in the dry slot now. My P&C grid still says 100% Showers today, I don't think that'll verify. Our high today says 68. After I finally knocked myself out after the Birmingham close call (I really thought Bham was done for), I was woke up sometime in the overnight by a steady pounding of hail on the window for about a minute. Not sure how much or how big, but it was loud. I see the SPC D1 has SEMI in 15% for wind and hail. Link to comment Share on other sites More sharing options...
Powerball Posted April 29, 2014 Share Posted April 29, 2014 Thus far, still cloudy at FNT but the radar echos have all moved to the northeast, putting us in the dry slot now. My P&C grid still says 100% Showers today, I don't think that'll verify. Our high today says 68. After I finally knocked myself out after the Birmingham close call (I really thought Bham was done for), I was woke up sometime in the overnight by a steady pounding of hail on the window for about a minute. Not sure how much or how big, but it was loud. I see the SPC D1 has SEMI in 15% for wind and hail. FWIW, they cancelled the spotter training class up there in Flint due to "the possibility of severe weather." Link to comment Share on other sites More sharing options...
Boogieman Posted April 29, 2014 Share Posted April 29, 2014 FWIW, they cancelled the spotter training class up there in Flint due to "the possibility of severe weather." Now, that is ironic. Link to comment Share on other sites More sharing options...
Hoosier Posted April 29, 2014 Share Posted April 29, 2014 Tornado warning in NW IL...radar indicated. Link to comment Share on other sites More sharing options...
Brewers Posted April 29, 2014 Share Posted April 29, 2014 There's a report of a brief touchdown in Carroll county Link to comment Share on other sites More sharing options...
Chinook Posted April 29, 2014 Share Posted April 29, 2014 Clearing nicely. Destabilization looking probable. For what it's worth, SPC mesoanalysis has 1000-2000 J/kg of CAPE in NW Ohio, with 40-70 knots winds at 500mb. That's pretty nuts considering it was all cold, all the time for a while. Link to comment Share on other sites More sharing options...
Geos Posted April 29, 2014 Share Posted April 29, 2014 Tornado Warning for Stephenson County ( Freeport) TORNADO WARNINGILC177-291715-/O.NEW.KDVN.TO.W.0009.140429T1644Z-140429T1715Z/BULLETIN - EAS ACTIVATION REQUESTEDTORNADO WARNINGNATIONAL WEATHER SERVICE QUAD CITIES IA IL1144 AM CDT TUE APR 29 2014THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A* TORNADO WARNING FOR...CENTRAL STEPHENSON COUNTY IN NORTHWEST ILLINOIS...* UNTIL 1215 PM CDT* AT 1138 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ATORNADO WAS LOCATED NEAR FORRESTON...AND MOVING NORTH AT 30 MPH.HAZARD...TORNADO.SOURCE...RADAR INDICATED ROTATION.IMPACT...SPORADIC DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.* LOCATIONS IMPACTED INCLUDE...FREEPORT...GERMAN VALLEY...CEDARVILLE...LENA...OAKDALE NATUREPRESERVE...ALBERTUS AIRPORT...BOLTON...DAKOTA DORNINK AIRPORT...SCIOTO MILLS...ELEROY...DAMASCUS...RED OAK...BUENA VISTA...MCCONNELL...ORANGEVILLE...LAKE LEAQUANA STATE PARK AND ONECO. Link to comment Share on other sites More sharing options...
Chitown Storm Posted April 29, 2014 Share Posted April 29, 2014 Longest period of hail I've ever personally witnessed here by 355 and 88 west of Chicago. Damn near hailed for 10 min straight. Got to around penny sized. Link to comment Share on other sites More sharing options...
Brewers Posted April 29, 2014 Share Posted April 29, 2014 Sfc obs show quite a bit of veering in that area. Link to comment Share on other sites More sharing options...
Boogieman Posted April 29, 2014 Share Posted April 29, 2014 Clouds are finally burning off here at FNT. Depending who's forecast you look at, high today of 68 to 72. Hopefully I can get out for a bike ride and take the dog for a walk before things start getting soggy later. Link to comment Share on other sites More sharing options...
nwohweather Posted April 29, 2014 Share Posted April 29, 2014 For what it's worth, SPC mesoanalysis has 1000-2000 J/kg of CAPE in NW Ohio, with 40-70 knots winds at 500mb. That's pretty nuts considering it was all cold, all the time for a while. Yeah absolutely beautiful and breezy day however tons of cumulus towers getting going. Definitely have a chance for some good severe weather today Link to comment Share on other sites More sharing options...
A-L-E-K Posted April 29, 2014 Share Posted April 29, 2014 super low visibility with thunder, kinda cool Link to comment Share on other sites More sharing options...
harrisale Posted April 29, 2014 Share Posted April 29, 2014 Amazingly, looks like a few discrete low-topped supercells moving over Lake Erie into SW Ontario. Storms are riding the warm front into good low-level shear environment and heading into better backed surface winds. Lack of instability may kill these off depending on how detached from the warm front they become, but LCLs could easily support some surface based storms. Some broad rotation is present on the velocity scans. Link to comment Share on other sites More sharing options...
Powerball Posted April 29, 2014 Share Posted April 29, 2014 Thank god it's only April 29th. It looks like our only shot now will be with the stuff developing in SE Indiana, and that's several hours away from here. Link to comment Share on other sites More sharing options...
Boogieman Posted April 29, 2014 Share Posted April 29, 2014 The wife and I just went out to grab a quick bite. Right now, 74 and comfortable, not muggy at all. Plenty of cu floating around but only one, way to the north, looked like it was really attempting to tower up. Nice breeze, I may add. Would have been a nice fishing day, if not for the breeze. I see a few showers popping up along the IN/OH border. The west side of the state has had some persistent showers, and a few popped south of Windsor over the lake. I guess we wait and see what sundown and nocturnal jet rouse up. In the meantime, I suppose a nice walk would be in order to enjoy the nice day and burn off the fish & chips! Link to comment Share on other sites More sharing options...
geddyweather Posted April 29, 2014 Share Posted April 29, 2014 I see a few showers popping up along the IN/OH border. The west side of the state has had some persistent showers, and a few popped south of Windsor over the lake. Yeah, those are what probably would start devolping if they choose to. Still some low amounts of instability for them to work with, around 500j/kg MLCape and 500-1000j/kg SBCape over NW Ohio. Link to comment Share on other sites More sharing options...
Stebo Posted April 29, 2014 Share Posted April 29, 2014 We really have mixed out the low-level moisture which the models did forecast, that isn't to say we couldn't have a hailer or some strong winds but any tornado threat is all but gone with this one unless we advect in more low-level moisture. Link to comment Share on other sites More sharing options...
Boogieman Posted April 29, 2014 Share Posted April 29, 2014 We really have mixed out the low-level moisture which the models did forecast, that isn't to say we couldn't have a hailer or some strong winds but any tornado threat is all but gone with this one unless we advect in more low-level moisture. After seeing all the destruction down south last night, I won't feel all that bad if we don't see any tornadoes in MI. Link to comment Share on other sites More sharing options...
KokomoWX Posted April 29, 2014 Share Posted April 29, 2014 We had a 53 MPH gust (35 MPH sustained) late afternoon as the front passed. I was out on a photo assignment at softball. Super fun! Link to comment Share on other sites More sharing options...
Stebo Posted April 30, 2014 Share Posted April 30, 2014 Nice cell moving up toward Detroit, lots of CGs coming out of that looking SE-SW. Link to comment Share on other sites More sharing options...
hm8 Posted April 30, 2014 Share Posted April 30, 2014 Interesting bowing-ish structure heading up through semi... Seeing some lighting in the distance now Link to comment Share on other sites More sharing options...
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