Area Forecast Discussion
Issued by NWS Northern Indiana
Issued by NWS Northern Indiana
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236 FXUS63 KIWX 110416 AFDIWX Area Forecast Discussion National Weather Service Northern Indiana 1216 AM EDT Tue Jun 11 2024 .KEY MESSAGES... - Getting warmer in the coming days with highs in the upper 80s to near 90 Wednesday and Thursday. - The next chance for rain and storms arrives Thursday afternoon and evening. Severe weather is possible, with the main threat being damaging wind gusts. - Highs will be in the low to mid 90s with heat indices pushing 100 to 105 degrees this weekend through at least the middle of next week! Can`t rule out a few low chances for showers and storms but this timeframe looks mainly dry as of now. && .DISCUSSION... Issued at 231 PM EDT Mon Jun 10 2024 Take advantage of the cooler day today, as it is likely the last day with highs in the 60s for awhile! Strong northerly winds have allowed for CAA to keep temperatures at bay today. This will not be in the case for the rest of the week, however, as winds will shift to come from the south and temperatures really heat up by the end of the week! Temperatures (and humidity) should get progressively higher each day this week. Highs will be in the upper 80s to near 90 Wednesday and Thursday. The main focus of the week aside from the approaching heat will be the return of rain and storms chances Thursday afternoon and evening. Severe weather is possible Thursday, with SPC putting much of our area in a 15% Risk (equivalent to a Slight Risk - level 2 of 5). As an area of low pressure lifts northward through the Central Plains, the attendant warm front will lift through our area overnight Wednesday into early Thursday. Highs near 90 degrees and dewpoints in the low to mid 60s will yield an increasingly unstable environment on Thursday. Simultaneously, a cold front will drop southeast through the upper Midwest Thursday, brining the chance for thunderstorm development ahead of it. Model agreement is lacking on exact timing and placement of the front; the GFS has a slightly faster solution that favors severe weather occurring during the afternoon and evening while the ECMWF has the timing later Thursday with a decoupled diurnal/kinematic setup. The GFS suggests MLCAPE of ~1500 J/kg by Thursday afternoon with 35 to 40 kts of 0-6 km shear orthogonal to the southeastward moving frontal boundary. In addition, GFS soundings show DCAPE of ~1000 J/kg, which would promote a favorable environment for damaging wind gusts to occur. We will continue to monitor this chance for severe weather so check back for updates in the coming days! Hot and humid weather is on its way! Surface high pressure and upper level ridging will build across much of the eastern CONUS, setting the stage for a `heat dome` to set up. Highs will be in the low to mid 90s with heat indices pushing 100 to 105 degrees this weekend through at least the middle of next week! Overnight lows in the upper 60s to mid 70s will offer little to no relief from the heat. Can`t rule out a few low chances for showers and storms but this timeframe looks mainly dry as of now. This is a typical summertime pattern for the Upper Midwest and Great Lakes regions where any clusters of storms that do develop tend to ride around the periphery of the heat dome. For those who enjoy the heat of summer, you won`t have to wait too much longer! && .AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/... Issued at 1215 AM EDT Tue Jun 11 2024 High pressure remains in control with VFR conditions, light winds and only some passing high clouds through the period. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...None. OH...None. MI...None. MARINE...None. && $$ DISCUSSION...Johnson AVIATION...Steinwedel