Area Forecast Discussion
Issued by NWS Grand Forks, ND

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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
FXUS63 KFGF 201210

Area Forecast Discussion
National Weather Service Grand Forks ND
710 AM CDT Tue Jun 20 2017

Issued at 708 AM CDT Tue Jun 20 2017

No changes necessary.


.SHORT TERM...(Today and tonight)
Issued at 216 AM CDT Tue Jun 20 2017

Showers associated with well defined mid level circulation
confined to the far south and east. Will maintain some low pops
this area until 12z then dry as high pressure builds into the
region. Will see a mix of clouds and sun today with current cloud
cover and afternoon cu development with convective temperatures
generally around 70. Thermal advection pretty neutral so
temperatures should be pretty similar to yesterday.

Warm advection kicks in overnight and based on strength of warm
advection could see some showers developing later tonight.
Will mention Thunder in forecast but convective parameters look

.LONG TERM...(Wednesday through Monday)
Issued at 216 AM CDT Tue Jun 20 2017

Strong wave propagates across southern Canada Wednesday with the
northern fa on south edge of best support as upper level jet
maxima rides along international border. Associated cold front
reaches the western fa mid/late afternoon. Sufficient shear and
northward extent of strong to severe storm potential ahead of
boundary will be determined by cloud cover which would limit
instability. Will stay consistent with SPC guidance for now.

Thursday looks dry and breezy with main energy to the north of the
fa. Highs should be closest to average in the valley with low
level westerly flow and a bit cooler west and east.

Long wave trough rotates through Hudson Bay and the western Great
Lakes on Sat. Split flow remains across North America with the
southern stream over the northern states and the northern stream
over central Canada. Northern stream becomes more dominate through
the period. Low amplitude long wave ridge axis off the Pacific
Northwest coast shifts to the US Rockies.

The ECMWF and the GFS were similar through the period with the ECMWF
a little higher amplitude solution. However the northern stream
becomes out of phase after Sun. Both the ECMWF and the GFS were
trending slower over the last couple model runs.

High temperatures were decreased one or two degrees for Fri,
decreased a degree for Sat and Sun, and no change for Mon from
yesterdays package.


.AVIATION...(For the 12Z TAFS through 12Z Wednesday morning)
Issued at 708 AM CDT Tue Jun 20 2017

With minimal fog early this morning expecting vfr conditions
through the period. Not enough confidence on timing or coverage of
showers after midnight across the west so left out of the DVL
TAF. |




SHORT TERM...Voelker
LONG TERM...JH/Voelker
AVIATION...Voelker is the U.S. government's official web portal to all federal, state and local government web resources and services.