Thursday, March4, 2021
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Marine Weather and Tides
Aten, NE

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:57AMSunset 6:24PM Thursday March 4, 2021 9:24 PM CST (03:24 UTC) Moonrise 12:00AMMoonset 10:06AM Illumination 61% Phase: Waning Gibbous; Moon at 21 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 Aten, NE
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location: 42.87, -97.49     debug


Area Discussion for - Sioux Falls, SD
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FXUS63 KFSD 042330 AFDFSD

AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 530 PM CST Thu Mar 4 2021

SHORT TERM. (This Evening through Friday) Issued at 259 PM CST Thu Mar 4 2021

After another mild and dry spring afternoon, light southeasterly winds decrease overnight. The combination of radiational cooling along with some subtle near-surface moisture advection may lead to some low stratus and patchy fog formation during the early morning hours Friday. Nevertheless, several models keep the surface layer unsaturated, so similar to previous nights, fog is expected to be a localized issue. Fog dissipates by the mid to late morning as daytime heating increases mixing.

Another above average warmth day is expected on Friday, albeit with a bit more cloud cover. Temperatures are forecast to be above 5 degrees cooler than Thursday due to a broad Canadian air mass over the western Great Lakes edging slightly closer to Siouxland. Winds remain light.

LONG TERM. (Friday Night through Thursday) Issued at 259 PM CST Thu Mar 4 2021

Over the weekend, the ridge aloft amplifies while the surface flow becomes more southerly. High temperatures over south central South Dakota surge back into the mid 60s on Saturday. On Sunday the ridge aloft begins to break down, leading to enhanced mixing as the pressure gradient tightens. The surface winds gusting 30 to 40 mph aid in bringing down warmer 850 hPa temperatures dry-adiabatically. Expect widespread highs in the low to mid 60s Sunday afternoon. The combination of stronger winds and warmer temperatures leads to high fire danger both Saturday and Sunday.

Another broad upper-level ridge develops for Monday and Tuesday of next week. Temperatures remain mild (about 20 degrees above normal) with persistent dry conditions.

On Wednesday and Thursday, a longwave trough over the western CONUS will move eastward over the Plains. Models differ on how they handle the pattern change, but precipitation chances increase and have been kept in the forecast. The latter portion of the work week will be cooler, with a return to nearer to normal temperatures as a cool continental air mass moves in.

AVIATION. (For the 00Z TAFS through 00Z Friday evening) Issued at 528 PM CST Thu Mar 4 2021

There's a bit more uncertainty regarding fog and stratus development overnight. Much like the past days, high resolution models struggle resolving cold ground and shallow surface moisture from snow melt. CONSshort guidance is likely too aggressive again with lower ceilings and fog coverage and will trend towards less aggressive HRRR. This would put at least some potential for fog areawide, but more focused along and west of the James river by daybreak and through mid-morning.

Outside of this potential, we could see lingering mid-upper clouds through the night, with a variable wind and more widespread VFR conditions through Friday.

FSD WATCHES/WARNINGS/ADVISORIES. SD . NONE. MN . NONE. IA . NONE. NE . NONE.

SHORT TERM . VandenBoogart LONG TERM . VandenBoogart AVIATION . Dux


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Yankton, Chan Gurney Municipal Airport, SD7 mi29 minE 810.00 miFair43°F39°F86%1025.1 hPa

Link to 5 minute data for KYKN

Wind History from YKN (wind in knots)
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Last 24hrE5E8E7E7E7E7E5E5E5E6E7E7E9E9E11
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1 day agoW8CalmCalmNW3NW3CalmNW3NW4CalmCalmCalmCalmNE34SE4E6SW10S9S6S7SE6SE4SE6SE7
2 days agoSE8SE8SE7SE6S8S5S12S17
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Tide / Current Tables for
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Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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