Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 171648
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
1048 AM MDT Tue Oct 17 2017

.DISCUSSION...(Today Through Monday)
Issued at 213 AM MDT Tue Oct 17 2017

Upper flow over the northern plains is west-northwesterly, as the
broad ridge continues to expand over the CONUS. Under clear
skies, winds are light and southwesterly, and temperatures at 2 AM
range from the upper 30s to the lower 50s.

Very mild and dry weather will continue today, with highs in the 70s
to lower 80s. Tonight, a Canadian wave will flatten the upper ridge
and push a cold front into the northern plains. Temperatures
Wednesday will cool into the 60s, and northwesterly winds will be
breezy across the SD plains. The upper ridge will rebuild for the
end of the week, with continued dry weather and temperatures warming
back into the 70s and lower 80s.

The next upper trough to affect the region will move in Friday
night. Some light rain/snow showers will be possible Friday night
into Saturday, with the GFS hinting at a few more showers Sunday as
a secondary wave clips the region. Highs this weekend will be in the
50s and 60s. Models are showing another large ridge building for
early next week.

&&

.AVIATION...(For the 18Z TAFS Through 18Z Wednesday)
Issued At 1047 AM MDT Tue Oct 17 2017

VFR conditions are expected through the forecast period.

&&

.FIRE WEATHER...
Issued At 213 AM MDT Tue Oct 17 2017

In general, low relative humidities can be expected
for the area through Friday, along with some breezy winds at times.
Very warm and dry conditions today combined with gusty southwesterly
winds across southern Campbell County will create critical fire
weather conditions there.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...None.
WY...Red Flag Warning until 6 PM MDT this evening for WYZ259.

&&

$$

DISCUSSION...Pojorlie
AVIATION...Johnson
FIRE WEATHER...Pojorlie



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