Marine Weather and Tides
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 7:36AM||Sunset 4:45PM||Friday December 13, 2019 2:33 AM CST (08:33 UTC)||Moonrise 6:19PM||Moonset 9:03AM||Illumination 97%|
7 Day Forecast for Marine Location Near Albert City, IAHourly EDIT Help
Area Discussion for - Sioux Falls, SD  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KFSD 130510 AFDFSD
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 1110 PM CST Thu Dec 12 2019
SHORT TERM. (This Evening through Friday) Issued at 317 PM CST Thu Dec 12 2019
Low stratus clouds at temperatures near -10 C will promote scattered flurries this afternoon as ice nuclei activate within the dendritic growth zone. No measurable snowfall is expected, but a light dusting is possible for some locations. These low clouds continue overnight, with low temperatures in the low teens to mid single digits.
A weak shortwave will move through the westerly flow aloft Friday morning. This wave provides subtle lift as the Sioux Falls region sits under the deformation zone. For this reason, have kept some chance PoPs in the forecast through the afternoon. There is not a lot of atmospheric moisture available with this wave which keeps expected precipitation amounts minimal west of I-29. A dusting to an inch is possible further east in locations such as Windom MN and Spencer IA, as forcing will increase as the wave traverses the area. Given temperatures aloft will be warmer than -10 C in the saturated layer, patchy freezing drizzle could mix with snow, but snow looks to be the dominant precipitation type, as colder mid-level clouds provide crystals for snowflake growth a majority of the time the lift is present. Afternoon temperatures Friday will be the warmest of the next 7 days, with highs in the mid 20s to mid 30s.
LONG TERM. (Friday Night through Thursday) Issued at 317 PM CST Thu Dec 12 2019
A cold front will push through Friday night into Saturday morning, with wind gusts of 25 to 30 mph. Light snow will again be possible ahead of this front Friday evening, but cold and dry air will be in place by Saturday morning, ending chances for light snow. The Canadian air mass will keep temperatures quite chilly Saturday & Sunday. Besides a few flurries Sunday afternoon and evening, precipitation is not expected for the weekend.
Cold, below-average temperatures continue into next week. The large- scale pattern remains largely unchanged through Wednesday night, with a longwave trough over Hudson Bay and a ridge over the western CONUS. This keeps the Sioux Falls area in quiet northwesterly flow, with the jet stream and active weather well to the south. The ridge could strengthen and shift eastward Wednesday into Thursday, which would help bring more mild and seasonable temperatures mid-week, but confidence in this scenario is currently low, given recent model runs have tended to overestimate the eastward progression of these longwaves.
AVIATION. (For the 06Z TAFS through 06Z Friday night) Issued at 1106 PM CST Thu Dec 12 2019
Widespread MVFR-IFR stratus to start the period will lower further through Friday morning, with IFR-LIFR conditions appearing likely for many areas north of the Missouri River Valley into the early afternoon before slight improvement. Areas of IFR visibility in fog most likely near and west of the James River Valley, including at KHON prior to 18Z Friday. At the same time, a relatively narrow band of light snow will lift through eastern parts of the region, mainly impacting areas east of the I-29 corridor Friday morning.
Winds remain relatively light for much of the period, but will increase from the northwest after 14/00Z, behind a cold front pushing through the area.
FSD WATCHES/WARNINGS/ADVISORIES. SD . NONE. MN . NONE. IA . NONE. NE . NONE.
SHORT TERM . VandenBoogart LONG TERM . VandenBoogart AVIATION . JH
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.
|Storm Lake, IA||15 mi||38 min||E 6||5.00 mi||Fog/Mist||14°F||14°F||100%||1013.5 hPa|
Link to 5 minute data for KSLB
Wind History from SLB (wind in knots)
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|2 days ago||W||W||W||NW||NW||NW|
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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 (3,6,7,8)(on/off)  Help
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