Curran, Illinois Weather Forecast Discussion

360
FXUS63 KILX 281101
AFDILX
Area Forecast Discussion...Updated Aviation
National Weather Service Lincoln IL
601 AM CDT Sun Sep 28 2025
.KEY MESSAGES...
- A long stretch of dry weather will likely continue through next
  week across central and southeast IL. This will worsen the
  ongoing drought conditions across central and southern IL where
  a moderate to severe drought currently prevails.
- Unseasonably warm daytime highs in the upper 80s to near 90 will
  prevail today through Tuesday. Lows will be mainly in the 50s.
  Temperatures look to trend down slightly Wednesday through next
  weekend with highs still in the low to mid 80s.
&&
.DISCUSSION...
Issued at 320 AM CDT Sun Sep 28 2025
The 08Z/3 am surface map shows weak 1016-1017 mb high pressure
over the upper MS river valley and southward across IL and into
southeast MO and AR. This has continued clear skies with light to
calm winds across central/se IL early this Sunday morning. A weak
frontal boundary extended from southeast lower MI into nw IN and
northern IL (near or just south of Galesburg and Lacon) and
slowly pushing southward. A narrow band of 6-7k ft clouds were
north of this boundary. Temps were in the mid 50s to lower 60s,
with a few spots having lower 50s with 53F at NWS Lincoln and 54F
at Jacksonville. Limited patchy fog near the Wabash river. Latest
CAMs show patchy fog developing in southeast IL mainly southeast
of I-70 next few hours especially near rivers/waterways and low
lying ares. Could be very patchy shallow ground fog over central
IL too early this morning as has been the case past few early
mornings. The shallow/ground fog should lift quickly around 8 am.
The weakening front will continue to weaken and lift back
northeast during today as weak high pressure ridge shifts
eastward. A strong 500 mb high (585-587 decameters) over the
Central Plains to strengthen as it expands over IL today with 500
mb heights rising to 589-591 decameters this afternoon and remain
in place into Tuesday. This will bring unseasonable warm daytime
highs in the upper 80s to around 90F today through Tuesday. Record
highs listed below are in the low to mid 90s today and Tue and
upper 90s to around 100 on Monday Sep 29th. Large diurnal swing in
temps continues much of this week by as much as 30-40F. Lows
tonight through Tue night generally in the mid 50s to near 60F.
Tropical Depression Number 9 between central Cuba and the Bahamas
is forecast by NHC to become a tropical storm today and hurricane
on Monday as it tracks northward through Mon night staying east of
FL and then turning ENE and staying off the Carolina coast. The
omega block pattern in place over the country with strong
subtropical ridge to continue to stay near IL and keep moisture
well southeast of IL this week. A fairly strong 1030-1034 mb
Canadian high pressure building over Hudson Bay and into Ontario
by Tue morning to drift se into New England and mid Atlantic
States Thu into Friday and ridging back into IL. A bit more cloud
cover by Wed with partly to mostly sunny skies and still pretty
warm highs in the mid 80s with some upper 80s possible. Highs in
the low to mid 80s Thu (coolest in eastern IL) Wed and Thu nights
to likely be the coolest night, with lows in the low to mid 50s,
with upper 40s possible Thu night in east central IL.
A strong upper level trof off the West Coast to push into the
Western States late this week, while strong mid/upper level ridge
covers much of the central and eastern US into next weekend. This
will likely continue the dry wx pattern along with above normal
temperature with warm highs in the 80s through at least Mon/Oct
6th.
The Climate Prediction Center (CPC) 8-14 Day Outlook for Oct 5-11
has 60-70% chance of above normal temperatures across IL, while
precipitation is trending near normal over the prairie state.
High temperatures in the 80s look to continue through at least
the 1st week of October. WPC is showing little or no QFP/rainfall
over IL and nearby states during the next 7 days. So the dry and
mild wx pattern during the next two weeks could exacerbate ongoing
drought conditions and field fire risks as we head into the peak
harvest season in central/se IL.
07
&&
.AVIATION...  (For the 12z TAFs through 12z Monday Morning)
Issued at 600 AM CDT Sun Sep 28 2025
VFR conditions will continue at all TAF sites next 24hrs with
clear skies and light winds.
Auten
&&
.CLIMATE...
Issued at 605 PM CDT Sat Sep 27 2025
Record high temperatures through Wednesday:
Location      Sunday     Monday    Tuesday    Wednesday
--------     --------- ---------- ----------  ---------
Bloomington  94 (1953) 100 (1953)  98 (1953)  92 (1897)
Champaign    94 (1953)  99 (1953)  91 (1971)  92 (1897)
Charleston   94 (1953)  99 (1953)  92 (1933)  94 (2019)
Decatur      96 (1953) 100 (1953)  94 (1922)  93 (1897)
Lincoln      96 (1953) 101 (1953)  93 (1952)  91 (2019)
Olney        97 (1939) 101 (1953)  93 (1952)  94 (1952)
Peoria       92 (1939)  98 (1953)  91 (1933)  89 (1937)
Springfield  94 (1953) 100 (1953)  92 (1971)  91 (2019)
&&
.ILX WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$

NWS ILX Office Area Forecast Discussion