Monday, December9, 2019
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Marine Weather and Tides
Northfield, MN

Version 3.4
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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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:35AMSunset 4:34PM Monday December 9, 2019 4:37 AM CST (10:37 UTC) Moonrise 3:17PMMoonset 4:40AM Illumination 94% Phase: Waxing Gibbous; Moon at 12 days in cycle
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.
Marine Forecasts
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7 Day Forecast for Marine Location Near Northfield, MN
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location: 44.46, -93.17     debug


Area Discussion for - Twin Cities, MN
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FXUS63 KMPX 090950 AFDMPX

Area Forecast Discussion National Weather Service Twin Cities/Chanhassen MN 350 AM CST Mon Dec 9 2019

SHORT TERM. (Today through Tuesday) Issued at 350 AM CST Mon Dec 9 2019

The two main changes to the short term portion of the forecast were to extend the Winter Weather Advisory south to the Iowa border, and to include colder wind chill values for tonight into Tuesday morning.

Moderate to heavy snow will continue shifting eastward across the forecast area this morning. We did see some freezing fog/precip develop ahead of the main band of snow overnight, particularly over south central MN. Additionally, the corridor of progged -15 to -20 (ubar/s) omega looks to extend into Iowa this morning, so snow amounts could push 2 inches all the way into our southern forecast area. With the anticipation of a quick 1-2 inches combined with the freezing fog/drizzle experienced overnight, thought the Advisory expansion was warranted. Elsewhere, forecast snowfall amounts look to be in good shape, so only tweaks were made.

By the afternoon, snow should come to an end west of the I35 corridor, but linger to the east near Ladysmith/Eau Claire through late afternoon. Did therefore extend the Advisory end time until 5 PM for that portion of west central WI.

We look to see a period of clearing this evening as Arctic air blasts into the region, and given the fresh snowpack, sub-zero lows look to be imminent across the area. Could see locations near 15 below in central MN, and given winds will not have receded much below 10 mph, wind chills could dip in the -25F to -30F range. Will need to keep an eye on temp/cloud/wind trends to assess whether a Wind Chill Advisory will be needed for tonight, particularly over west central MN.

Can't rule out a few flurries on Tuesday in the cold air advection regime, but an overall dry day is expected with highs from -5F to +5F still looking reasonable.

LONG TERM. (Tuesday night through Sunday) Issued at 350 AM CST Mon Dec 9 2019

The latter portion of the forecast continues to look fairly quiet. The large scale pattern will de-amplify by midweek as the eastern upper trough lifts out. Zonal flow across the northern CONUS will prevail through the end of the week, with some troughing redeveloping over the central part of the continent by the end of next weekend (although there is significant disagreement in the guidance in terms of the position and amplitude of that upper trough). Arctic high pressure will bring dry weather and cold temperatures Tuesday night through Wednesday night. Went slightly cooler than consensus guidance on temperatures during that period given the fresh snowfall that should be in place. Return flow will develop by late Wednesday night, and the forecast will unfortunately need low chance PoPs for much of the period from Thursday into the weekend as we see a series of weak shortwave troughs move through the region. As we get closer in time and guidance comes into better agreement we'll likely see PoPs increased some of more restricted time frames, but for now can't see much reason to stray from the NBM given the uncertainty. Regardless, nothing points toward any significant system in the region through the forecast period, so precipitation amounts would be light with near normal temperatures.

AVIATION. (For the 06Z TAFS through 06Z Monday night) Issued at 1142 PM CST Sun Dec 8 2019

Confidence increasing in a band of snow moving through the region tonight and this morning. Visibilities are around 1/2 mile under this band, so have added a tempo of LIFR conditions. Look for northerly wind to increase as well overnight and into Monday morning. Eventually wind gusts will decrease and clouds will scatter out Monday night.

KMSP .

We could see some IFR snow showers around 11Z, but it appears that the main band of heavy snow will move through between 12 and 15Z this morning. HiRes models are showing hourly snowfall rates of 1-2 inches per hour within this band, so may need an AWW if sites out west are confirming this guidance. The heaviest snow will end by mid morning, and should have VFR conditions settle in late this evening or early Tuesday night.

/OUTLOOK FOR KMSP/ Tue . VFR and cold. Wind NW 10 kts. Wed . VFR and cold. Wind NW 5-10 kts. Thu . VFR. Wind SSE 5 kts.

MPX WATCHES/WARNINGS/ADVISORIES. WI . Winter Weather Advisory until noon CST today for WIZ014-023-024- 026.

Winter Weather Advisory until 5 PM CST this afternoon for WIZ015- 016-025-027-028.

MN . Winter Weather Advisory until noon CST today for MNZ049>053- 058>063-066>070-075>078-083>085-092-093.

Winter Storm Warning until noon CST today for MNZ041>045.

Winter Weather Advisory until 9 AM CST this morning for MNZ047- 048-054>057-064-065-073-074-082-091.



SHORT TERM . LS LONG TERM . AVIATION . JRB


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stanton Airfield, MN8 mi42 minN 04.00 miFog/Mist32°F30°F94%1002.4 hPa
Faribault, Faribault Municipal Airport, MN11 mi42 minN 04.00 miFog/Mist32°F30°F93%1002.7 hPa
Minneapolis, Airlake Airport, MN13 mi42 minN 05.00 miFog/Mist34°F33°F100%1002.7 hPa
Owatonna Degner Regional Airport, MN24 mi43 minN 04.00 miFog/Mist30°F28°F93%1002.7 hPa

Link to 5 minute data for KSYN

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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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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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Wind Forecast for Twin Cities, MN (5,6,7,8)
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Ground Weather Radar Station Minneapolis, MN
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