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4/25-4/28 Severe and Heavy Rain Threat


Geoboy645
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The models within the last couple of days have really honed in on a potential multi-day severe and heavy rain threat over this weekend over the western part of the forum. With a particular focus at this point on Friday in IA for severe and a heavy rain event over the Upper Mississippi Valley for the weekend. Considering how wet it has been in that part of the forum for the last month and a half, there may be some flooding concerns as we get closer. Could be a very busy weekend here in the Midwest.

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It’s a little outside of the geography of this sub but I am planning on chasing Friday and Saturday. Friday in Iowa along the warm front and Saturday farther southwest along the dryline in Kansas or maybe Oklahoma. Been a long time since I’ve done a little multi day chase so I am pretty pumped about this weekend.


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up here looking like two main rounds with the two waves/lows that ride NE.  First is a heavy rain threat Friday afternoon transitioning to scattered severe storms overnight and into the afternoon on Saturday.  The second low will bring more heavy rain and a risk of severe along the triple point on Sunday afternoon and evening.

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not really in this area, but tor-e in west Omaha suburbs, pretty nasty looking wedge. this is a crazy couplet considering this is only about 6 miles from the radar site

Screenshot_20240426_164019_RadarOmega.jpg

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1 hour ago, cyclone77 said:

A lot more ops coming up for heavy rains over the next week looks like.  Severe aspect lucks pretty wussy for this area.  

I only got 0.15" today, lower than even the driest models.  You just can't start the day with cold, dry air and expect to get much.  Several models predicted 1+" across my area, so they really blew it.

Saturday night into Sunday morning is still uncertain.  Models are predicting anything from only a few tenths to a couple inches.  It just depends on where the storms blow up.

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5 minutes ago, SchaumburgStormer said:

TOG east of Des Moines 

Severe Weather Statement
National Weather Service Des Moines IA
857 PM CDT Fri Apr 26 2024

IAC099-153-270230-
/O.CON.KDMX.TO.W.0023.000000T0000Z-240427T0230Z/
Polk IA-Jasper IA-
857 PM CDT Fri Apr 26 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR
SOUTHEASTERN POLK AND WESTERN JASPER COUNTIES...

At 857 PM CDT, a confirmed large and extremely dangerous tornado was
located over Pleasant Hill, moving northeast at 35 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...You are in a life-threatening situation. Flying debris may
         be deadly to those caught without shelter. Mobile homes
         will be destroyed. Considerable damage to homes,
         businesses, and vehicles is likely and complete destruction
         is possible.

The tornado will be near...
  Des Moines, Altoona, Pleasant Hill, Bondurant, Adventureland
  Amusement Park, and Prairie Meadows around 900 PM CDT.
  Mitchellville around 905 PM CDT.
  Valeria around 915 PM CDT.
  Colfax around 920 PM CDT.
  Mingo around 925 PM CDT.

Other locations impacted by this tornadic thunderstorm include Mingo,
Valeria, and Runnells.

This includes the following highways...
 Interstate 80 between mile markers 140 and 155.
 Interstate 235 between mile markers 10 and 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, TAKE COVER NOW! Move
to a basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
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2 minutes ago, yoda said:
Severe Weather Statement
National Weather Service Des Moines IA
857 PM CDT Fri Apr 26 2024

IAC099-153-270230-
/O.CON.KDMX.TO.W.0023.000000T0000Z-240427T0230Z/
Polk IA-Jasper IA-
857 PM CDT Fri Apr 26 2024

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR
SOUTHEASTERN POLK AND WESTERN JASPER COUNTIES...

At 857 PM CDT, a confirmed large and extremely dangerous tornado was
located over Pleasant Hill, moving northeast at 35 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...You are in a life-threatening situation. Flying debris may
         be deadly to those caught without shelter. Mobile homes
         will be destroyed. Considerable damage to homes,
         businesses, and vehicles is likely and complete destruction
         is possible.

The tornado will be near...
  Des Moines, Altoona, Pleasant Hill, Bondurant, Adventureland
  Amusement Park, and Prairie Meadows around 900 PM CDT.
  Mitchellville around 905 PM CDT.
  Valeria around 915 PM CDT.
  Colfax around 920 PM CDT.
  Mingo around 925 PM CDT.

Other locations impacted by this tornadic thunderstorm include Mingo,
Valeria, and Runnells.

This includes the following highways...
 Interstate 80 between mile markers 140 and 155.
 Interstate 235 between mile markers 10 and 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is on the ground. To protect your life, TAKE COVER NOW! Move
to a basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

Rain wrapped too. 

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Unfortunately, but not surprisingly, most of the CAMs are showing much of the storms and heavy rain tracking eastward, to the south of the boundary that extends northeastward through southeast Iowa.  North of the boundary we may end up with nothing more than some light rain.

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1 hour ago, Chinook said:

possible tornado in Wisconsin

I pulled up GR Level 3 about 6:30 and saw what appeared to be a bona fide supercell taking shape near Monticello tracking east. I grabbed my cameras and loaded them into the car; right as I was doing so is when the tornado warning went out. I had redemption for bungling yesterday's southwest Iowa chase on my mind. Not to be as by the time I got to where I would have had a view of the updraft base, the storm had essentially ceased to exist. Currently getting some nice boomers back at the house in Madison.

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20 hours ago, frostfern said:

Hoping a train sets up at some point with this pattern.  Nice one over northern lower at this point.  Models showing mostly boring stratiform for here though.  :(  EML is all eaten up by time the front is nearby.

I am not surprised by the results.  Heavier stuff remained to our south with these setups.  Pretty typical this time of year as the colder Great Lakes seem to keep things in IN and OH; storms just get into the southern 2 rows of MI (Coldwater, Kzoo and Jackson).  Tomorrow might be our best chance but even then I am not going to hold my breath as it is just April (not a great storm month for my area normally).

 

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20 minutes ago, Lightning said:

I am not surprised by the results.  Heavier stuff remained to our south with these setups.  Pretty typical this time of year as the colder Great Lakes seem to keep things in IN and OH; storms just get into the southern 2 rows of MI (Coldwater, Kzoo and Jackson).  Tomorrow might be our best chance but even then I am not going to hold my breath as it is just April (not a great storm month for my area normally).

 

Storms actually missed north yesterday.  There was some decent hail near Ludington.  This just isn't a Great Lakes setup though.  It's a plains setup. 

Best bet for stronger convection farther north and east looks to be next week Thursday.  Still uncertainty though.  Still way better pattern than last year at this time when there were hardly any storms anywhere in the US.  Keeping my fingers crossed there is no blocking again this May.  That just killed spring storm season last year.

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