Day 1 Outlook Day 2 Outlook Day 3 Outlook Days 4-8 Outlook

Day 1 Outlook Convective Tornado
Hail Wind
Categorical Day1 1630Z Outlook
  
Images courtesy of the NWS Storm Prediction Center
 Forecast Discussion


000
ACUS01 KWNS 181601
SWODY1
SPC AC 181600

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1100 AM CDT Tue Sep 18 2018

Valid 181630Z - 191200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE UPPER MIDWEST...

...SUMMARY...
Isolated hail and damaging wind gusts are possible today over parts
of the Upper Midwest.

...NE/IA/IL...
A persistent cluster of thunderstorms is affecting much of northern
IA and adjacent regions this morning, with the leading-edge outflow
surging southward across eastern IA.  Much of this region has been
stabilized by the convection, leaving a corridor from eastern NE
into northwest IL where sufficient heating is possible later today. 
This axis may see storm intensification by mid/late afternoon, with
the strongest cells capable of hail or locally damaging wind gusts. 
Present indications are that the severe risk will remain isolated
and marginal in nature.

..Hart/Darrow.. 09/18/2018

$$