Area Forecast Discussion
Issued by NWS Northern Indiana

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
FXUS63 KIWX 231157

Area Forecast Discussion
National Weather Service Northern Indiana
757 AM EDT Wed May 23 2018

Issued at 751 AM EDT Wed May 23 2018

High pressure over the area will keep conditions dry and sunny
through Friday night. Temperatures will become unseasonably warm
for the holiday weekend, with highs in the mid to upper 80s.
Expect highs in the 70s and low to mid 80s today and Thursday.
Lows will be in the 50s and 60s. There is a chance for showers and
thunderstorms Saturday into Monday, mainly during the afternoon
and early evening timeframe.


.SHORT TERM...(Today and Tonight)
Issued at 333 AM EDT Wed May 23 2018

Primary emphasis on modified marine layer with inland extent
across northwest CWA. Moist boundary layer and temps several
degrees below crossover allowing areas of dense fog/stratus to
envelop Laporte/Berrien Counties. Farther inland expect more
patchy nature/more diffuse marine layer and while upstream
convective debris may limit further temp fall, will continue to
assess for potential areal expansion next couple hours.


.LONG TERM...(Thursday through Tuesday)
Issued at 333 AM EDT Wed May 23 2018

Weak boundary to slide southward through the Upper Great Lakes
associated with shortwave spur through high belted northern stream
flow for slight chance shra/tsra this weekend, primarily tied to
diurnal heat/instability cycle. Otherwise split flow dominates
with stagnating surface airmass with incremental increases in
heat/humidity through the weekend. Eventual impact as tropical
disturbance remnants lift northward still likely beyond current
forecast timeframe.


.AVIATION...(For the 12Z TAFS through 12Z Thursday Morning)
Issued at 751 AM EDT Wed May 23 2018

VFR conditions are expected at the terminals for the most
part...with the exception for fog potential this morning. While thus
far the terminals haven`t really been impacted as of yet, it still
remains a possibility as many sites are still below 2 miles-
especially across the southwest where KOXI/KMGC/KRCR are all at 1/2
mile or less. Will leave MVFR conditions through 13z to account for
this, given continued light winds and surrounding observations.


IN...Dense Fog Advisory until 9 AM CDT this morning for INZ003-012.

MI...Dense Fog Advisory until 10 AM EDT this morning for MIZ077.

LM...Dense Fog Advisory until 10 AM EDT this morning for LMZ043-046.



LONG TERM...Murphy

Visit us at

Follow us on Facebook...Twitter...and YouTube at: is the U.S. government's official web portal to all federal, state and local government web resources and services.