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Severe Threat for Wednesday, July 2WIFR Blog Listing
Severe Threat for Wednesday, July 2
Topic Author: Mark Henderson
Posted: 8:35 PM Jul 1, 2008
Replies Posted: 5 comments
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Severe Threat for Wednesday, July 2
A cold front's approach Wednesday afternoon will be the likely trigger for thunderstorms that could be strong to severe in spots.

The Storm Prediction Center highlights the Stateline with a slight risk of severe weather during the afternoon and evening hours. According to their convective (thunderstorm) outlook, there's a 30% chance of severe weather occurring within 25 miles of a given point. Ok, that might sound a bit confusing, so let me make this a little easier to understand. Picture having a map of the Stateline....now, put your finger on any point on that map, and draw a circle with roughly a 25 mile radius. Anywhere within that circle would have a 30% chance of seeing severe weather. For example, let's say we chose Rockford as our center point. We could then draw a circle that goes from Freeport to Durand to Beloit to Marengo to Rochelle or thereabouts. Anywhere within that circle would have a 30% chance of seeing severe weather... and that's really the case for Wednesday, since the entire Stateline is covered in that slight risk area. I guess to make a long and complicated story much much shorter, the Storm Prediction Center says there's a 30% chance of severe weather here on Wednesday.

Below, you'll see the setup for Wednesday afternoon's storms. It's one of the simpler setups for severe weather....we're generally just talking about a classic battle of the airmasses here... Warm air ahead of the front colliding with cold air behind the front. It's a stronger front than some of those we've seen recently, so there might be a little more "oomph" to these storms than we've seen in a couple weeks.

We're probably talking about a damaging wind threat more than anything else with this severe weather episode, but there's the possibility that some large hail could be a factor in some of these storms. The tornado threat is rather small, because the winds here at the surface and upper levels are primarily coming out of the same direction (SW). For tornadoes to be a prominent threat, you'd normally like to see winds at the surface out of the S or SSE, with upper level winds out of the WSW or W to promote rotation within a given storm. That's not to say we can completely rule out tornadoes as a threat...but the chances don't look to be that high.

Just a reminder, should a watch or warning be issued for the Stateline, we'll initiate a live blog with instantaneous updates to give you the most up to date information! You'll find that right here on the weather page at wifr.com

Oh yeah, one more thing... once we get rid of these storms Wednesday night or early Thursday morning...it's clear sailing straight through the 4th of July weekend!

Read Comments
Posted by: Carol L. Mark - received your ad about the trip to Punta Cana. Was seriously considering it until I looked up the EXACT SAME TRIP on Orbitz travel site and they have the SAME TRIP including air and the same dates for $1094.00! You REALLY need to change the price of your outrageously priced trip. Plus - the hotel is only rated 3 stars. I wish you well on this one!

Posted by: Doug Location: Loves Park
I was watching weathernow Sat. morning and was wondering what Areal flooding means? I don't remember seeing this before but then again after 40 your memory starts to go. LOL! Thanks we really appreciate what you guys do their. Keep up the great work!

Posted by: Homer Location: Rockford
9:02 pm-Thursday-July 10th. Having lots of trouble getting the local weather online. I can get the national forecast by not the local. No maatter what I zap could you please HELP with this situation. Skies SW were orange and NW yellow how weird ;then they turned black. Is there another storm headed our way. I'lll watch at 10

Posted by: Pam Munger Location: Rockford
what threats are going on right now?

Posted by: Lisa Location: Loves Park, IL
Hi Adam, I just wanted to let you know that on the weather page you made a mistake. You entered Thursday twice for the week's forecast and it should say Friday. You may want to fix that!