Sep 26, 2022 0100 UTC Day 1 Convective Outlook
Updated: Mon Sep 26 00:28:44 UTC 2022 (20220926 0100Z Day 1 shapefile | 20220926 0100Z Day 1 KML)
Probabilistic to Categorical Outlook Conversion Table
Categorical Graphic
20220926 0100 UTC Day 1 Outlook Graphic
Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
MARGINAL 7,644 6,271,019 Chicago, IL...South Bend, IN...Gary, IN...Waukegan, IL...Cicero, IL...
Probabilistic Tornado Graphic
20220926 0100 UTC Day 1 Tornado Probabilities Graphic
Probability of a tornado within 25 miles of a point.
Hatched Area: 10% or greater probability of EF2 - EF5 tornadoes within 25 miles of a point.
Day 1 Tornado Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Damaging Wind Graphic
20220926 0100 UTC Day 1 Damaging Wind Probabilities Graphic
Probability of damaging thunderstorm winds or wind gusts of 50 knots or higher within 25 miles of a point.
Hatched Area: 10% of greater probability of wind gusts 65 knots or greater within 25 miles of a point.
Day 1 Wind Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
5 % 7,618 6,440,937 Chicago, IL...South Bend, IN...Gary, IN...Waukegan, IL...Cicero, IL...
Probabilistic Large Hail Graphic
20220926 0100 UTC Day 1 Large Hail Probabilities Graphic
Probability of hail 1" or larger within 25 miles of a point.
Hatched Area: 10% or greater probability of hail 2" or larger within 25 miles of a point.
Day 1 Hail Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
No Risk Areas Forecast
   SPC AC 260028

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0728 PM CDT Sun Sep 25 2022

   Valid 260100Z - 261200Z

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHERN
   LAKE MICHIGAN AND VICINITY...

   ...SUMMARY...
   Gusty winds may accompany convection in the vicinity of southern
   Lake Michigan for the next few hours.

   ...Southern Lake MI Vicinity...

   Several weak disturbances are embedded within broader northwest flow
   along the backside of Great Lakes/OH Valley upper trough. One of
   these features has progressed to southern Lake MI/northeast IL and a
   forced line of convection is propagating southeast in response to
   this short wave. Locally damaging winds have been noted with this
   band of convection as it spread across WI, however nocturnal cooling
   should begin to negate stronger gusts mixing to the surface with
   this activity. For the next few hours gusty winds may be noted,
   primarily across southern Lake MI and near the lakeshore.

   ..Darrow.. 09/26/2022

   CLICK TO GET WUUS01 PTSDY1 PRODUCT

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z