Monday, August19, 2019 L-36.com


Marine Weather and Tides
Rapid City, SD

Version 3.4
NOTICE
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 5:59AMSunset 7:53PM Monday August 19, 2019 10:27 AM MDT (16:27 UTC) Moonrise 10:05PMMoonset 9:51AM Illumination 83% Phase: Waning Gibbous; Moon at 19 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 Rapid City, SD
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location: 44.06, -103.23     debug


Area Discussion for - Rapid City, SD
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Fxus63 kunr 191112
afdunr
area forecast discussion for western sd and northeastern wy
national weather service rapid city sd
512 am mdt Mon aug 19 2019

Discussion (today through Sunday)
issued at 211 am mdt Mon aug 19 2019
upper flow over the northern plains is nearly zonal, with slight
ridging to the west. Skies across the region are mostly clear.

With a surface high to the east and a low to the northwest, winds
across the CWA are generally light and southerly. Temperatures are
in the 50s to lower 60s.

As breezy southwesterly winds develop across much of the CWA today,
warm and dry air will advect into the area. Temperatures will rise
into the lower 90s, beneath sunny skies. A couple of shortwaves will
cross the region this evening, and the cams are picking up on some
thunderstorms tapping into the instability that will develop across
central sd. Thunderstorms may clip perkins and tripp counties, but
most of the area will remain dry.

A cool front will slowly push into the area from the north on
Tuesday. Highs will be cooler - but still warm - in the 80s. With
the surface high sliding into the region and continued weak upper
ridging to the west, dry conditions are expected during the day.

However, a shortwave will cross the region in the evening, bringing
the chance for some thunderstorms. Decent shear and some weak to
moderate instability could allow for a few stronger storms,
especially along the sd NE border and around the black hills area.

Cooler air will continue to sink into the region on Wednesday,
resulting in highs in the 70s to lower 80s. The upper ridge axis
will cross the northern plains in the evening, along with more weak
upper-level energy that could spark a few more storms. Thursday
evening has the greatest chance for thunderstorms, as a stronger
trough moves through. Chances for storms continue into Friday, but
the weekend is looking drier at this time. Expect highs in the 80s
for the latter part of the week.

Aviation (for the 12z tafs through 12z Tuesday morning)
issued at 510 am mdt Mon aug 19 2019
(for the 06z tafs through 06z Monday night)
issued at 1017 pm mdt Sun aug 18 2019
patchy fog and ifr CIGS in low stratus are possible near the
sd neb border early this morning, otherwiseVFR conditions are
expected today and tonight. Isolated thunderstorms are possible
late this afternoon and early this evening over parts of
northwestern and south central south dakota.

Fire weather
Issued at 211 am mdt Mon aug 19 2019
today will be hot and dry, with highs in the 90s. Conditions will
be especially dry across northeastern wy, where minimum relative
humidity will dip to 10 to 15%. Although sustained winds aren't
expected to be very strong, soundings are showing gusts of 20 to
30+ kts mixing down to the surface across northeastern wy and
southwestern sd. Will upgrade to a red flag warning across the
northeastern wy plains. Considered including the southwestern sd
and southern black hills zones for similar conditions there;
however, greenness might be higher so will leave them out for now.

Unr watches warnings advisories
Sd... None.

Wy... Red flag warning from noon today to 7 pm mdt this evening for
wyz259-297-298.

Discussion... Pojorlie
aviation... 10
fire weather... Pojorlie


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Rapid City, Rapid City Regional Airport, SD9 mi35 minSE 510.00 miFair72°F63°F73%1011.2 hPa
Ellsworth Air Force Base, SD10 mi91 minS 310.00 miFair73°F59°F63%1011.3 hPa

Link to 5 minute data for KRAP

Wind History from RAP (wind in knots)
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Last 24hrS13S15
G25
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S10S9SE7NE5E6E6SE5SW3CalmS4CalmCalmCalmNE3CalmCalmCalmSE3SE5
1 day agoN10N10N12N20
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N6N6N4N5N5N5CalmCalmSE3CalmS10S9S13
2 days agoSE3SE5SE733E33NE5NE6NE6NE8CalmNW3CalmNW7NW8NW6NW8NW7W5N4NE7N6N12

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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GOES 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

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Wind Forecast for Rapid City, SD (12,3,4,5)
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Ground Weather Radar Station Rapid City, SD
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.