Marine Weather and Tides
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 7:15AM||Sunset 5:09PM||Thursday January 21, 2021 8:14 PM CST (02:14 UTC)||Moonrise 11:54AM||Moonset 12:49AM||Illumination 63%|
7 Day Forecast for Marine Location Near Ashland, ILHourly EDIT Help
Area Discussion for - Central Illinois, IL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KILX 212350 AFDILX
Area Forecast Discussion National Weather Service Lincoln IL 550 PM CST Thu Jan 21 2021
SYNOPSIS. Issued at 116 PM CST Thu Jan 21 2021
Thursday temperatures have surged well above normal with afternoon readings between 45-50 degrees in most spots. The exception has been north of Highway 150/24 where a light snowpack has kept temperatures down in the lower 40s. Much colder air arrives Tonight into Friday as a cold front pushes across central IL. Morning wind chill values will be in the low single digits across our northern counties for Friday and Saturday mornings.
Focus then turns toward Sunday-Monday as a dynamic winter storm system lifts across central and northern Illinois.
SHORT TERM. (This evening through Friday) ISSUED AT 116 PM CST Thu Jan 21 2021
Sfc analysis depicts an occluded low just south of the Hudson Bay with a secondary cold front sagging south across the Upper- Midwest. The cold front will continue trudging southward across central IL late tonight and eventually washout over southern IL. This will yield an impressive north-to-south temperature gradient overnight with low temperatures crashing into the teens behind the front, while mid-to-upper 20s lie ahead of it.
Diurnal warming on Friday will be squelched by a good cold-air advection regime ahead of a southeast-building Canadian high, which is expected to slide across the Mid- Mississippi Valley by late afternoon. Daily highs will range from about 20 degrees across our north, to about 30 degrees across our south.
Temperatures will crash Friday night as the center of high pressure settles directly over central IL. Overnight lows will bottom-out in the single digits north of I-72 with lower teens to the south. Wind chill values will be near zero early Saturday morning for many locations across central Illinois.
LONG TERM. (Saturday through Thursday) ISSUED AT 116 PM CST Thu Jan 21 2021
The arctic surge will be short-lived. By Saturday morning, a robust mid-level shortwave trough is progged to dig along the West Coast toward Baja California. Heights will begin to rise across the Southern Plains in response to milder Gulf and Pacific air nosing in from the south and southwest. Afternoon temperatures across central IL will rebound into the 30s with overnight lows in the upper 20s.
By early Sunday morning, strong isentropic ascent across the Mid- Mississippi Valley will help to quickly saturate the lower troposphere. Model soundings are depicting a thermal profile indicative of freezing rain, especially for locations south of I-72. Ice amounts will be tempered by a loss of cloud ice nuclei and gradually warming temperatures. By Sunday afternoon, much of central IL will experience scattered light rain showers as surface temperatures warm into the upper 30s. Generally speaking, travel impacts will be very limited. Still, a thin glaze of ice could accrete on elevated surfaces and bridge decks.
The focus then shifts toward late Sunday night through Monday as the mid-level shortwave opens up across the Southern Plains and pivots across the Missouri Ozarks. Strong synoptic lift will be in-place across central IL on Monday with good diffluence ahead of the negatively-tilted wave and a jet-coupling feature emerging in the upper troposphere. At the surface, a low-pressure system will lift across the Ohio River Valley. This will place central Illinois in the favorable northwest quadrant for TROWAL precipitation.
While confidence remains medium/low on the exact track of this storm system, mid-range global guidance now reveals a swath of moderate- to-heavy snowfall across central or northern IL for Monday evening. Banded snow is at least possible according to the latest guidance, which now shows negative EPV in the 600-500mb layer located on the immediate warm side of the 600mb frontogenesis axis. All this means right now is that confidence is increasing in at least Advisory-level snow (3-6 inches) across our north, namely north of a Rushville-to-Kankakee line. However, any notable changes in the track of surface low could significantly change the thermal profile. At this time, temperatures are forecast to be in the mid 30s during the time of heaviest precip; by no means a slam-dunk snow forecast! For what it's worth, the latest NBM 25-75th percentile is advertising 2-5 inches for locations north of a Rushville-to-Kankakee line. The ECMWF ensemble and GEFS are also hinting at 2-5 inches for a similar area.
After a break in wintry weather on Tuesday, some light wintry precip may return by mid-week as yet another shortwave trough lifts across the Mid-Mississippi Valley. Temperatures for the middle of next week will be seasonable according to the NBM, with daily highs in the middle 30s and overnight lows in the low 20s.
AVIATION. (For the 00Z TAFS through 00Z Friday evening) Issued at 549 PM CST Thu Jan 21 2021
Gusty W-NW winds are developing behind the cold front this evening, with 14G24KT possible for several hours after FROPA. Even after midnight the NW wind gusts could creep up to 20KT at times. sustained NW winds tomorrow could remain in the 12-14KT range for at least the morning if not longer.
VFR conditions should prevail this evening, but a narrow corridor of MVFR 2500FT clouds could become BKN at PIA, BMI and CMI between 06z and 11z behind the front. Confidence is not too high on the coverage and timing, but did add BKN025 at the I-74 terminal sites for a few hours during that window. Other than that, VFR conditions will prevail beyond 11z tomorrow morning.
ILX WATCHES/WARNINGS/ADVISORIES. NONE.
SYNOPSIS . MJA SHORT TERM . MJA LONG TERM . MJA AVIATION . Shimon
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Jacksonville Municipal Airport, IL||12 mi||79 min||W 6||10.00 mi||Fair||40°F||23°F||51%||1012.9 hPa|
|Springfield - Abraham Lincoln Capital Airport, IL||20 mi||22 min||NW 6||10.00 mi||Fair||37°F||20°F||50%||1013.8 hPa|
Link to 5 minute data for KIJX
Wind History from IJX (wind in knots)
|1 day ago||NW|
|2 days ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||SW||SW||SW||SW|
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NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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