Fairview Heights, IL Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Fairview Heights, IL

June 14, 2024 6:51 AM CDT (11:51 UTC) Change Location
Sunrise 5:33 AM   Sunset 8:27 PM
Moonrise 12:25 PM   Moonset 12:20 AM 
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7 Day Forecast for Marine Location Near Fairview Heights, IL
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Area Discussion for - St. Louis, MO
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Area Forecast Discussion...Updated Aviation National Weather Service Saint Louis MO 629 AM CDT Fri Jun 14 2024


- Above average temperatures are expected through next week with Sunday and Monday the warmest days as peak heat index values reach the upper 90s to 105 F. Although confidence in heat index values reaching dangerous levels is low, care should still be taken since this period will be the first wave of summer-like heat.

- There are multiple opportunities with low (20 to 40 percent)
chances of showers and thunderstorms, especially mid-next week.

(Through Late Saturday Afternoon)
Issued at 344 AM CDT Fri Jun 14 2024

Multiple weakening clusters of showers and thunderstorms skirting central and southeastern MO will gradually dissipate early this morning as expanding cold pools and nocturnal cooling decrease instability in the absence of any strong forcing. The increasingly diffuse cold front originally responsible for these showers and thunderstorms will push southward through the CWA this morning as well. Although this front is anticipated to be south of the CWA by this afternoon and large-scale forcing within upper-level northwesterly flow will be negligible, CAMs indicate diurnally aided instability behind the front supporting a stray shower or thunderstorm during the afternoon across southeastern MO. Low-level CAA behind the front will be weak with high temperatures again reaching the upper 80s to low-90s F with infiltration of drier air/lower dewpoints a more noticeable change along and north of I-70.

On Saturday, most short-term models depict weakening showers and thunderstorms across western MO tracking eastward during the morning and early afternoon while dissipating as a LLJ weakens and they outrun richer instability to the west. The latest HRRR has highest probabilities of showers and thunderstorms to the west of the CWA but these probabilities reach around 20 percent across central and northeastern MO. Cloud debris from those showers and thunderstorms could have some impact on Saturday's high temperatures; however, a decrease in these clouds through the day and onset of low-level WAA are expected to provide temperatures similar to today.


(Saturday Night through Thursday)
Issued at 344 AM CDT Fri Jun 14 2024

Late Saturday through the beginning of next week, global models are in good agreement that an anomalous upper-level ridge will blossom across the eastern CONUS, downstream of longwave troughing across the western CONUS. This upper-level wave pattern will leave the central CONUS, under the influence of weak, persistent southerly flow through much of the troposphere with a summer-like pattern in the CWA characterized by widespread temperatures in the 90s F (most days), increasing dewpoints/humidity, and chances of showers and thunderstorms at times. The NBM portrays the warmest, furthest above average temperatures of the period on Sunday and Monday owing to those days favored to have the least cloud cover, lowest probability of precip, and strongest southerly flow. The combination of temperatures well into the 90s F and increasing humidity will support peak afternoon heat index values reaching the upper 90s to 105 F. Although confidence is not high that heat index values will reach dangerous thresholds, care should still be taken, especially for vulnerable individuals, since this period will be the first wave of summer-like heat across the CWA Late Monday onward, a series of low-amplitude mid-level shortwave troughs/potential MCVs are progged to drift northward in the aforementioned southerly flow, increasing the chance of showers and thunderstorms at times. It is impossible to glean further details of these features at this juncture, but associated showers/thunderstorms and cloud cover introduce some uncertainty in daily temperature forecasts after Monday. This uncertainty is encapsulated by NBM interquartile temperature ranges increasing to 5 to 8 F. With the 25th percentile remaining above average, however, confidence in above average temperatures persisting is still high.


(For the 12z TAFs through 12z Saturday Morning)
Issued at 629 AM CDT Fri Jun 14 2024

A patch of IFR or MVFR stratus across central and northeastern MO could briefly impact KCOU this morning. Otherwise, dry and VFR flight conditions will prevail through the vast majority of the TAF period along with light northerly winds today, becoming easterly or variable tonight.



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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KBLV SCOTT AFB/MIDAMERICA,IL 9 sm56 minWNW 0710 smMostly Cloudy77°F66°F69%29.91
KCPS ST LOUIS DOWNTOWN,IL 9 sm58 minWNW 0910 smClear77°F64°F65%29.93
KALN ST LOUIS RGNL,IL 22 sm16 minWNW 0710 smMostly Cloudy73°F68°F83%29.96
KSTL ST LOUIS LAMBERT INTL,MO 23 sm60 minW 0610 smMostly Cloudy75°F64°F69%29.95
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