Marine Weather and Tides
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 6:25AM||Sunset 8:36PM||Sunday August 9, 2020 3:55 PM CDT (20:55 UTC)||Moonrise 10:46PM||Moonset 11:17AM||Illumination 67%|
7 Day Forecast for Marine Location Near Vermillion, SDHourly EDIT Help
Area Discussion for - Sioux Falls, SD  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KFSD 091956 AFDFSD
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 256 PM CDT Sun Aug 9 2020
SHORT TERM. (This Evening through Monday Night) Issued at 255 PM CDT Sun Aug 9 2020
Warm and muggy airmass leading to a capped but unstable environment across the area. Capping inversion appears to be fairly strong through 00Z, but maybe weakened this evening as a cold front moves through. CAMs are offering a variety of solutions, but those chances appear to be very conditional based on (near) saturation in the 850-600 mb layer. After 06Z tonight, models are suggesting a fairly strong 700 mb frontogenetic band moving along and south of I- 90. With this forcing and ample saturation near 700 mb, atmosphere has 1500-2000 J/kg of elevated CAPE with a fairly linear hodograph. 2-7 km bulk shear values increase through the night, with values approaching 25-35 knots by 12Z Monday morning. Could see an isolated severe storm with hail and wind being the primary severe threats.
Storms are expected to move out of the area on Monday morning, and with Canadian high pressure building into the Northern Plains, tranquil conditions are expected the remainder of Monday into Tuesday.
LONG TERM. (Tuesday through Sunday) Issued at 255 PM CDT Sun Aug 9 2020
On Tuesday, southerly flow will increase on the backside of the surface ridge leading to increasing moisture throughout the day. On Tuesday night, a shortwave is expected to track into the Central Plains, and could see a chance of convection overnight. With that said, elevated instability appears to be conditional and limited. With relatively weak wind shear through the column and limited instability, expect any storms to remain below severe limits.
Clouds and capping inversion look to be challenges as Wednesday rolls around, but with increased humidity, instability is greater if a storm can develop. Best chances appear to be Wednesday night into Thursday morning as a series of impulses move across in zonal flow.
The heat and humidity look to stick around through Friday night when a cold front is expected to plunge southward. This may provide cooler and less humid conditions next weekend with limited chances of precipitation.
AVIATION. (For the 18Z TAFS through 18Z Monday afternoon) Issued at 1231 PM CDT Sun Aug 9 2020
VFR conditions are expected to prevail through the period; however, there are still some chances for convection that may result in temporary MVFR conditions. This evening, a cold front will shift through the region. With the passage of the front, south winds will become northwest. There is also a chance of thunderstorms with the frontal passage. On Monday morning, there is a chance for elevated thunderstorms, but the chance is very conditional. Best chances for thunderstorms appears to be along and south of I-90. Included a prob30 at KFSD, but confidence was not high enough to include mention at KSUX.
FSD WATCHES/WARNINGS/ADVISORIES. SD . NONE. MN . NONE. IA . NONE. NE . NONE.
SHORT TERM . BT LONG TERM . BT AVIATION . BT
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.
|Yankton, Chan Gurney Municipal Airport, SD||20 mi||60 min||SSE 10||10.00 mi||Fair||89°F||73°F||59%||1010 hPa|
Link to 5 minute data for KYKN
Wind History from YKN (wind in knots)
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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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Sioux Falls, SD (16,3,4,5)(on/off)  Help
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