Scientific Forecaster Discussion

Return to Local Conditions & Forecast

Without Abbreviations
With Abbreviations

Area forecast discussion 
National Weather Service Grand Forks ND
256 PM CDT Friday Jul 11 2014

Short term...(this evening through Saturday night)
issued at 255 PM CDT Friday Jul 11 2014

Forecast challenge concerns precipitation chances and temperatures. Models
in reasonable agreement and will use blend for forecast.

Time running out for convection across our eastern forecast area.
Boundary has exited the NE forecast area leaving the far southeast in prefrontal
environment. Some capping remains with favored moisture
convergence on the southeast forecast area boundary. Will maintain some
low probability of precipitation across the far east remainder of the afternoon leaving
the evening precipitation free. Farther west a narrow band of weak
convection over SW-S central ND associated with entrance region of
upper jet. As this feature drifts east could see some light precipitation
work into the SW forecast area later tonight. Remainder of the region will
remain dry tonight. Column cools modestly tonight in wake of
boundary and with lower dewpoints temperatures will be slightly

Some lingering rain showers across the far south otherwise no rain
expected brunt of the day Saturday as high noses in. More
significant rain expected well to our south. Column cooler however
westerly surface flow should allow temperatures to recover close
to average.

More potent shortwave will rotate around upper low swinging
through ND/Canadian border area late Saturday afternoon and overnight.
An associated cold front will enter the northern forecast area by evening
dropping through the forecast area overnight. With lowering freezing levels
and just enough instability/cape will have to watch for some
strong storms during the evening. With strong cold advection
except for the far south temperatures overnight will be dropping
below average.

Long term...(sunday through friday)
issued at 255 PM CDT Friday Jul 11 2014

Sunday looks mainly dry with sub average temperatures.

Another wave rotating around upper low will swing through forecast area
Sunday night. This will bring another cold front through forecast area. This
will bring much cooler overnight lows with northern areas dropping
into the upper 40s.

Monday will see maximum temperatures struggle to get much above
lower 60s. With moist layer and low convection temperatures will
likely see plenty of clouds and scattered rain showers.

Monday night-Friday...models in good agreement until later in the
period. High pressure will be in place leading to dry conditions.
Temperatures will warm each day...back to normal values by late
week. The European model (ecmwf) has a stronger short wave that flattens the upper
ridge by Friday bringing thunder chances...while the GFS sticks with
a strong ridge and warmer/dry weather.


Aviation...(for the 18z tafs through 18z Saturday afternoon)
issued at 1232 PM CDT Friday Jul 11 2014

Wind shift/frontal boundary is moving quickly southeast...and is now
through all taf sites. There may be scattered cumulus behind this
boundary...but mostly VFR conditions expected through the period.
Breezy northwest winds this afternoon along and west of the valley
will become light this evening.


Fgf watches/warnings/advisories...


Short term...voelker

National Weather Service Glossary of Abbreviations