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 7:10AM||Sunset 4:16PM||Thursday December 5, 2019 12:39 PM MST (19:39 UTC)||Moonrise 2:23PM||Moonset 1:15AM||Illumination 64%|
7 Day Forecast for Marine Location Near Rapid City, SDHourly EDIT Help
Area Discussion for - Rapid City, SD  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KUNR 051743 AFDUNR
Area Forecast Discussion For Western SD and Northeastern WY National Weather Service Rapid City SD 1043 AM MST Thu Dec 5 2019
DISCUSSION. (Today Through Wednesday) Issued at 335 AM MST Thu Dec 5 2019
Broad upper ridging over the western CONUS is placing the Northern Plains beneath fast northwest flow. Skies across the region are mostly clear. At the surface, high pressure is located across the Central Plains with low pressure slowly sliding across North Dakota, dragging a cold front through eastern Montana at the moment. Temperatures across the forecast area at 3am are in the 20s to lower 30s, with west to northwest winds.
Dry upper level northwest flow will keep weather quiet for a few more days, with temperatures near average. Highs will slightly cooler today as a weak cold front moves the Northern Plains, then warming again Friday and Saturday ahead of the next shortwave. Model soundings are showing some fog developing late today and tonight behind the cold front, as more moist air moves in. Best areas for fog will be over and along the northern and eastern edges of the Black Hills, and across northeastern Wyoming. Areas across southern South Dakota can also expect some fog tonight. With temperatures below freezing tonight, expect some light ice accumulations on elevated surfaces.
Fog and freezing fog will continue into Friday morning. Western ridge axis moves a little closer to the Northern Plains with dry weather continuing. Surface high pressure shifts to the southeast of the area with southerly boundary layer flow returning. Temperatures will be a few degrees warmer than today.
Ridge axis moves over the Northern Plains on Saturday as south to southwest boundary layer flow continuing. Saturday will be the warmest day this week, with temperatures in the 40s most areas.
Upper ridging breaks down mid weekend, as a strong trough moves into the Pacific Northwest. A strong cold front and upper shortwave will bring some light precipitation and colder temperatures to the region late Sunday into Sunday night. A half inch to around an inch of snowfall will be possible late Sunday night into early Monday morning. Breezy northwest winds will accompany the cold front, and persist into Tuesday. The colder air will stick around into the middle of next week, with temperatures moderating later in the week.
AVIATION. (For the 18Z TAFS Through 18Z Friday) Issued At 1043 AM MST Thu Dec 5 2019
A cold front will continue to push southward across the forecast area today. MVFR/IFR conditions will develop from northwest to southeast behind the front. Areas of freezing fog with LIFR conditions will develop this evening and continue into Friday morning, especially around the Black Hills.
UNR WATCHES/WARNINGS/ADVISORIES. SD . None. WY . None.
DISCUSSION . 15 AVIATION . 13
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.
|Rapid City, Rapid City Regional Airport, SD||9 mi||48 min||N 21 G 30||10.00 mi||Fair and Breezy||36°F||28°F||73%||1019.5 hPa|
|Ellsworth Air Force Base, SD||10 mi||44 min||N 22 G 24||10.00 mi||Mostly Cloudy and Breezy||36°F||27°F||71%||1020 hPa|
Link to 5 minute data for KRAP
Wind History from RAP (wind in knots)
|1 day ago||N||NW||S||Calm||S||Calm||W||W||SW||W||W||NW||NW||NW||NW||NW||W||NW||Calm||W||NW||Calm||S||SE|
|2 days ago||N||N||N||SW||SW||SW||SW||N||Calm||NW||NW||W||NW||Calm||W||Calm||W||W||NW||NW||Calm||Calm||W||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 Rapid City, SD (14,3,4,5)(on/off)  Help
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