Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FXUS63 KOAX 271122
AFDOAX

Area Forecast Discussion
National Weather Service Omaha/Valley NE
622 AM CDT WED JUL 27 2016

.SHORT TERM...(today through Friday)
Issued at 353 AM CDT Wed Jul 27 2016

QPF variance amongst the models is making fcst over the next
several days problematic at best. Part of the problem is timing
differences with respect to embedded impulses in NW flow aloft in
conjunction with no significant thermal advection to hang your hat
on. Given this...seems best approach is to base fcst on solution
means.

88D radar mosaic this morning showing line of convection over cntrl
Neb darting SEWD and should be crossing into the wrn CWA periphery
any time now. The last several runs of HRRR/RAP13 indicate any pcpn
activity over the CWA should be at a close sometime around
12z...so will gear morning POPS as such. Later this evening...area
of convection may fire along/south I-80 along leading edge of weak
sfc bndry migrating south. Post-frontal pcpn may be possible as
well within regime of steep mid-lyr lapse rates/weak mid lyr
ageostrophic lift...with destabilization being aided somewhat
further by passing weak impulse. On Thursday...pcpn chances look
somewhat remote given drier air mass will be building in from the
north. Thursday night/Friday...pcpn chances increase from SW-NE in
response to another passing shortwave trof. It appears per latest
GFS/ECM/CMC the brunt of activity will be found west of the CWA.
For Friday night...am content to just go with token small POPS as
QPF fields are all over the place.

.LONG TERM...(Friday night through Tuesday)
Issued at 353 AM CDT Wed Jul 27 2016

Continuing pcpn on Saturday/Saturday night will finally push to the
east on Sunday in response to a low amplitude upper ridge
approaching from the west. Dry conditions then the rest of the
extend pds. And with increasing hgts progged to encompass the
plains...a rebound in temps are expected with max temps once again
pushing into the mid 90s Monday and Tuesday.

&&

.AVIATION...(For the 12Z TAFS through 12Z Thursday morning)
Issued at 619 AM CDT Wed Jul 27 2016

Generally VFR conditions are forecast through Thursday morning.
Broken mid level clouds should give way to scattered to broken
clouds around FL050 by 18Z. There is a slight chance for
thunderstorms to pop up near KOMA and KLNK TAF sites between 20Z
and 03Z as a cold front slips through the area. However expect
this activity to fire southeast of TAF sites, thus have kept
mention out of the forecast. Otherwise expect south winds turning
to north as the front passes KOFK by 18Z and KLNK and KOMA by 00Z,
with speeds generally 10kt or less.

&&

.OAX Watches/Warnings/Advisories...
NE...None.
IA...None.
&&

$$

SHORT TERM...DEE
LONG TERM...DEE
AVIATION...Dergan


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.