Area Forecast Discussion
Issued by NWS Hastings, NE

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FXUS63 KGID 162037

Area Forecast Discussion
National Weather Service Hastings NE
237 PM CST Thu Nov 16 2017

.SHORT TERM...(This evening through Friday)
Issued at 221 PM CST Thu Nov 16 2017

Gusty southerly winds have taken hold across the area under weak
ridging in the mid and upper levels. These winds will die off a
bit this around 5-15 MPH.

Late tonight, continued southerly flow will advect some stratus
into the area. This increased low-level moisture may even be
enough to develop some patchy drizzle and some fog, particularly
along and east of Highway 281. Low temperatures should bottom out
in the upper 30s to 40s.

On Friday, a weak front will move through the area, which should
be sufficient to shift winds back to the west and eventually
northwest and start decreasing the cloud cover. The biggest
question on Friday is how warm we get during the afternoon. With
some lingering cloud cover, I would tend to favor the low-end of
guidance, but even that is in the 60s for most of the area.
Ultimately, I think that south and western portions of the CWA may
make a run at 70 degrees, while areas to the north and east where
clouds linger may struggle to make it to the upper 50s.

.LONG TERM...(Friday night through Thursday)
Issued at 221 PM CST Thu Nov 16 2017

On Friday night, a fairly strong upper-level wave will pass
through the area developing a band of frontogenetic precipitation
across Central Nebraska and Northern Kansas. Precipitation will
start off as rain, but this wave will bring a punch of colder air,
which may allow precipitation to change over to snow after
midnight into the early morning of Saturday. The latest NAM and
the GFS are slightly a bit colder than previously, but
temperatures are still marginal (33 to 36 degrees). This should
help keep any snow accumulation relatively minimal (0.5" or less).

Behind this wave, Saturday will be cold and windy, with northwest
winds gusting to 30-40 MPH. Low temperatures on Saturday night
will fall into the low to mid 20s.

A warming trend starts on Sunday, and continues on Monday as the
upper-level pattern deamplifies a bit. Highs on Monday could once
again reach 60 degrees across parts of the area. This warming
trend will be interrupted by another wave moving through on
Tuesday and Wednesday, though. This wave will have little moisture
to work with, so no precipitation is expected.

Models have been quite variable for the end of the next week and
the Thanksgiving Holiday weekend, but right now it appears that
Thanksgiving will feature near to above normal temperatures.
Another system looks poised to impact the area on the Friday and
Saturday after Thanksgiving. While it is still too far away to get
specific with any details, it doesn`t appear that it will have a
big impact on the local area.


.AVIATION...(For the 18Z KGRI/KEAR TAFS through 18Z Friday)
Issued at 1126 AM CST Thu Nov 16 2017

Southerly wind gusts up in the 25-30 kt range will be the main
aviation impact this afternoon.

Tonight, winds will gradually decrease, making LLWS possible
starting around 03Z. Winds aloft will diminish by around 9-10Z,
which will end this threat.

Increasing low-level moisture may allow low stratus and even some
patchy fog to develop across the eastern half of Nebraska. As
such, the GRI terminal may be more impacted by this than EAR.
Guidance takes the GRI ceilings to the IFR category, while EAR may
end up staying on the western edge of the lowest clouds.

Clouds should gradually lift and break up by late morning into the


Issued at 221 PM CST Thu Nov 16 2017

On Saturday, northwest winds will be 20 to 30 MPH with gusts of
35 to 40 MPH possible. The good news is that relative humidity
values won`t be conducive to fire development for most of the
area. The exception is parts of Phillips and Rooks Counties and
Kansas where humidity may dip to near-critical levels (20 to 30%)

Warmer weather on Sunday will lead to lower RH values, although
wind speeds will be significantly lower and out of the southwest.
Nevertheless, this is expected to push portions of Kansas to near-
critical fire conditions. Minimum RH values are expected to be 20
to 25% across northern Kansas with wind gusts of 15 to 20 MPH.




SHORT TERM...Mangels
LONG TERM...Mangels
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