Marine Weather and Tide Forecast for Nora, IL

SHORT TERM /THROUGH TONIGHT/
Issued at 355 AM CDT Wed Apr 23 2025

A 30-35 kt LLJ pointed into our area impinging on a stalled frontal boundary across Iowa, and increasing warm air advection has triggered a couple of bands of thunderstorms early this morning. The Highway 30 corridor has had the most storms with rainfall amounts of 1-2 inches, along with pea size hail. These storms were beginning to weaken.

Today and tonight: Heights rise pushing the boundary a bit farther north into our northern counties. This is where the focus of new storm development occurs later this afternoon and into tonight. SPC has a Marginal Risk (Level 1 of 5) in roughly our northwest half with the potential for hail up to one inch and strong gusty winds. Steep lapse rates and enough deep-layer shear will support hail. Freezing level will be around 9300 ft with MUCAPE 1000-1600 J/kg.

With skies becoming partly sunny and at least several dry hours this afternoon this should boost temperatures into the mid to upper 70s at most locations. Lows tonight in the lower to mid 50s.

LONG TERM /THURSDAY THROUGH TUESDAY/
Issued at 355 AM CDT Wed Apr 23 2025

Thursday through Friday: A decent short wave in the zonal flow and cold front moves across the forecast area. Showers and thunderstorms should beome likely with this feature.

Friday night and Saturday: With the front well to our east and high pressure building into the upper Midwest/Great Lakes this will bring pleasant weather to our area. Lows will be in the lower to mid 40s with highs in the lower to mid 60s.

Sunday and Sunday night: As we get on the other side of the progressing ridge axis, elevated return flow may spawn more showers and storms trying to spread in from the west. But the lingering ridge effects and dry air may erode incoming activity from the west until there's better support later Sunday night.
Afternoon highs on Sunday will be back into the 70s.

Monday through Tuesday: Global models indicate a strong synoptic storm system is expected to impact the area early next week and the Storm Prediction Center continues with a Slight Risk (15% probability) for severe storms over most of the DVN forecast area on Monday, and in our se counties on Tuesday. All modes of severe weather is possible. Stay tuned for further updates on this rather large area of severe weather from Minnesota/Wisconsin to Oklahoma. Highs will be in the lower 80s with dewpoints in the 60s so it will feel more summer-like.

AVIATION /06Z TAFS THROUGH 06Z THURSDAY/
Issued at 104 AM CDT Wed Apr 23 2025

Areas of thunderstorms overnight and into Wednesday morning with MVFR conds in the storms. Confidence is low with regard to timing and placement of any additional storms later on Wednesday so have kept the mention of PROB30 at several of the taf sites.

DVN WATCHES/WARNINGS/ADVISORIES
IA...None.
IL...None.
MO...None.