364
fxus63 kiwx 211858
afdiwx
area forecast discussion
national weather service northern indiana
258 pm edt thu may 21 2026
.key messages...
- showers and scattered thunderstorms late friday into friday
night. storms not severe, but locally heavy rainfall likely.
- scattered showers & isolated storms at times early next week.
- warm next week with highs around 80 to 85.
&&
.discussion...
issued at 250 pm edt thu may 21 2026
northeast flow associated with a surface high pressure area that
was centered over lake superior was causing a northeast flow over
northern indiana and surrounding areas. dew points were only in
the 30s to around 40 early today. this chilly pattern will bring
one more cold night with lows dipping into the 40s over most
locations.
after tonight, energy in the form of short wave trofs will eject
east and bring showers and scattered thunderstorms north of the
ohio river. the next one of these systems will reach the forecast
area by late friday. moisture will spread over the midwest ahead
of this system. precipitable water values will rise anomalously
high and reach between 1.75" and 2.00" friday per gfs. overall
wind speeds and subsequent wind shear should stay weak. expect
storms will stay below severe levels but will be accompanied by
locally heavy rains.
chances for rain and storms will continue next week as
temperatures warm and as moisture increases over the area. a
large capping inversion will develop over the area during this
time. flow will remain weak, but moisture will remain high.
storm coverage should remain very limited until about wednesday
when some energy is able to eject out of the upper level trof
and make it into the midwest.
&&
.aviation /18z tafs through 18z friday/...
issued at 131 pm edt thu may 21 2026
high pressure moving east, north of the area, gives way to
increasing moisture friday morning as low pressure moves northward.
given this exchange of pressure centers, gradient wind is expected
to be active with sustained winds between 10 and 20 kts and with
gusts between 20 and 25 kts more likely this afternoon than friday
morning. we`ll have to look towards 18z or shortly thereafter for
the arrival of mvfr cigs (fwa has a greater chance for these) and
rain probably starts some time in the mid to late afternoon friday.
&&
.iwx watches/warnings/advisories...
in...none.
oh...none.
mi...none.
marine...none.
&&
$$
discussion...skipper
aviation...roller