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Marine Weather and Tides Portage Des Sioux, MO Version 3.4

NOTICE 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.

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Sunrise 7:10AM

Sunset 5:15PM

Monday January 25, 2021 1:20 PM CST (19:20 UTC)

Moonrise 2:17PM

Moonset 4:46AM

Illumination 93%

NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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7 Day Forecast for Marine Location Near Portage Des Sioux, MO

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Area Discussion for - St. Louis, MO

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FXUS63 KLSX 251743 AFDLSX

Area Forecast Discussion . Updated National Weather Service Saint Louis MO 1143 AM CST Mon Jan 25 2021

UPDATE. Issued at 1137 AM CST Mon Jan 25 2021

Surface temperatures remain around or slightly above freezing in northeast MO and west-central IL, which does not bode well for ice accretion. Amounts were reduced, but another round of light precipitation downstream will be monitored for impacts. The most likely scenario appears to be a mix of rain and snow during the afternoon, changing to light snow through the evening. The heaviest rainfall that dropped over 1.5" of rain in portions of the central and southeastern CWA is now east of the area. While showers are still lingering along and south of I-70, the bulk of precipitation is over for this area. As expected, dry antecedent conditions prevented any impactful flooding, but rises on several tributaries were observed through the morning.

MRB

SHORT TERM. (Through Late Tuesday Afternoon) Issued at 358 AM CST Mon Jan 25 2021

Initial wave of rain continues to expand in coverage and slide northward into region early this morning. Still a rather complex forecast with varying factors affecting the precipitation type. A number of models/soundings are still indicating that the dendritic growth zone will lose saturation by late this morning, especially across northern portions of forecast area where the wintry mix has been forecast to occur. Surface temperatures in this area will remain right around 32 degrees today through this evening, before colder air finally moves in late tonight. This would keep a mainly light rain/freezing rain scenario, with ice accumulations up to two tenths of an inch possible for the Winter Weather Advisory area, though some minor snowfall accumulations are still possible, especially during the morning hours today.

Other issue with this system continues to be the heavy rain expected for areas along and south of I-70 through midday today. Rainfall between half an inch and an inch, with locally higher amounts across portions of southeast Missouri, is expected. While we could still see close to record daily rainfall amounts at both KSTL and KUIN, it looks like amounts will be a bit less than previously forecast. Also, our dry antecedent conditions should keep flooding risks to a minimum. Have seen some lightning early this morning via NLDN lightning plot as well as GOES 16 GLM products. So still expect some rumbles of thunder across portions of southeast Missouri today. By this afternoon, dry slot will slide across southern half of forecast area, with precipitation tapering off in this area by early this evening, while precipitation lingers along and north of I-70 through Tuesday morning.

Dry conditions expected by Tuesday afternoon with highs in the low 30s to mid 40s.

Byrd

LONG TERM. (Tuesday Night through Sunday) Issued at 358 AM CST Mon Jan 25 2021

After a bit of a break in activity Tuesday night, another system will slide through region on Wednesday as upper level trough over the southwestern U.S. lifts northeastward through region. Latest model and ensemble runs are a bit weaker with this system and moisture return is questionable, so kept NBM solution with just slight chance/low end chance POPs on Wednesday.

Otherwise, near normal temperatures are expected through Thursday before warming up into the mid 40s to low 50s by Saturday. Next chance for rain will be Saturday through Saturday night and with the warmer weather it will mainly be in the form of rain at this time.

Byrd

AVIATION. (For the 18z TAFs through 18z Tuesday Afternoon) Issued at 1106 AM CST Mon Jan 25 2021

IFR conditions currently in place are expected to hold in place at the terminals throughout the forecast period. After this morning's heavy rain at KCOU and the St. Louis metropolitan terminals, drier air will move into central and southern Missouri through the evening and end precipitation chances there. KUIN still has the potential to see a rain/snow mix through the evening tonight, but precipitation rates should remain light.

Despite drier air moving in, low stratus is expected to linger in place across the region. IFR CIGs are expected to lower to LIFR overnight, and while slight improvements or variations in the ceilings are possible, categorical changes are not expected until beyond the forecast period.

MRB

PRELIMINARY POINT TEMPS/POPS. Saint Louis 41 36 38 28 / 100 20 5 5 Quincy 35 30 32 21 / 90 60 40 10 Columbia 41 31 34 24 / 100 20 5 10 Jefferson City 44 34 36 26 / 100 20 5 10 Salem 41 37 42 29 / 100 20 5 0 Farmington 45 36 41 27 / 100 5 0 5

LSX WATCHES/WARNINGS/ADVISORIES. MO . Winter Weather Advisory until 6 AM CST Tuesday for Knox MO-Lewis MO-Marion MO-Shelby MO.

IL . Winter Weather Advisory until 6 AM CST Tuesday for Adams IL- Brown IL.



WFO LSX

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Weather Reporting Stations

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
St. Charles, St. Charles County Smartt Airport, MO	7 mi	26 min	E 11	9.00 mi	Light Snow	38°F	34°F	86%	1005.6 hPa
St. Louis Regional Airport, IL	13 mi	30 min	ENE 13	10.00 mi	Overcast	36°F	36°F	100%	1005.4 hPa
St. Louis Lambert International Airport, MO	13 mi	29 min	E 10	9.00 mi	Overcast	37°F	34°F	89%	1005.9 hPa

Link to 5 minute data for KSET

Wind History from SET (wind in knots)

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Tide / Current Tables for

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Tide / Current Tables for

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Weather Map

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GEOS Local Image of    EDIT
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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Other links: Northern Pacific     Contential US     Full GOES-East

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Ground Weather Radar Station

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