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Area forecast discussion 
National Weather Service Grand Forks ND
338 am CDT Wednesday may 27 2015

Short term...(today through thursday)
issued at 315 am CDT Wednesday may 27 2015

Surface trough passed through last evening. A bit more stable and
drier airmass over the area today...but later this afternoon some
instability returns to far western forecast area. Hrrr/rap do have a
couple of small cells in that dvl-vcy area so kept our low pop we

Main short wave will move northeast from Wyoming and into western/central
ND tonight into the Red River 12z-18z period. 30 knots 850 mb jet and an
area of elevated instability present will be sufficient to keep
an area of showers and thunderstorms in tact as it moves toward
and into the area overnight into Thursday. Storm Prediction Center has marginal risk
of severe weather Thursday. Models in fair agreement with main short
wave center and surface low moving to near gfk midday with a cold
front southwest. Out ahead of this cold front and south of the low
mu convective available potential energy in the 1000-1500 j/kg range and negative showwalters
would support thunderstorms. But bulk shear is weak in the afternoon
with the cold front. Thus severe threat pretty limited.

Long term...(thursday night through tuesday)
issued at 315 am CDT Wednesday may 27 2015

Precipitation chances will Thursday night as high pressure and north winds and
a cooler airmass move in from the north. Friday will be breezy and
cool. High pressure will move into SW mantioba Friday night and
center of ridge and light winds over north central ND means a good
chance for frost in this area.

For Saturday through Tuesday...will start off with nearly zonal flow
aloft and high pressure at the surface. For this reason the forecast
will start off dry for Sat/Sat night. All model solutions show a
wave passing through on Sunday...the GFS a little faster than the other
models...and bringing some precipitation to most of the area. More spotty
precipitation for Sun night/Monday as surface low sets up over the western High
Plains with warm front extending out to the east. Flow shifts to the
southwest Monday night/Tuesday with models diverging quite a bit in precipitation
placement. HPC guidance handles this by broadbrushing precipitation chances
everywhere during this period and will keep as is for now. Temperatures
start off on the cool side for Sat/sun then more normal by


Aviation...(for the 06z tafs through 06z Wednesday night)
issued at 1125 PM
CDT Tuesday may 26 2015fr conditions are expected through the period.
There is a low chance for some patchy fog overnight in any
area...but confidence is not high so will not mention.
Otherwise...middle and high clouds will increase after 00z Thursday ahead
of the next chance for convevtion just after this period into


Fgf watches/warnings/advisories...


Short term...Riddle
long term...godon/Riddle

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