346
FNUS73 KFGF 130057
FWSFGF

Spot Forecast for Grandpas RX...SDFR PBA
National Weather Service Grand Forks ND
757 PM CDT Tue May 12 2026

Forecast is based on ignition time of 1600 CDT on May 13.
If conditions become unrepresentative, contact the National Weather
Service.

Please call the NWS in Grand Forks at 701-795-5127 for additional
information and monitor our website (www.weather.gov/fgf) or NOAA
All-Hazards Radio for the latest updates.

...RED FLAG WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING...
...WIND ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

.DISCUSSION...

Winds tomorrow will be lighter despite continued dry conditions.
Initially in the morning, you can expect some light and variable
winds, however as mixing increases through the day these winds
will become more northerly. By mid afternoon tomorrow, expect
winds to shift to southerly to 10-15 mph sustained. Relative
humidity by tomorrow afternoon should fall into at least the mid
20s, with the general expectation of upper teens to low 20s as the
most likely minimum relative humidity. Winds continue to increase
from the south through tomorrow evening, becoming sustained 20-30
mph by midnight tomorrow/Thursday morning.

.WEDNESDAY...

Sky/weather.........Sunny (0-10 percent).
Max temperature.....Around 77.
Min humidity........23 percent.
Wind (20 ft)........Northeast winds around 5 mph.
Mixing height.......8900 ft AGL.
Mixing winds........West around 5 mph.
Smoke dispersal.....(51100 knot-ft).

TIME (CDT)      4PM 5PM
Sky (%).........3   3
Weather cov.....
Weather type....
Tstm cov........
Temp............75  75
RH..............25  24
20 FT wind dir..NE  E
20 FT wind spd..5   5
20 FT wind gust.11  11
Mix hgt (kft)...8.9 8.5
Mixing wind dir.W   W
Mixing wind spd.5   5
Vrate kt-ft/1K..53  51

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear (20-30 percent).
Min temperature.....Around 52.
Max humidity........50 percent.
Wind (20 ft)........Breezy. East winds 5 to 10 mph increasing to
                    southeast around 25 mph with gusts to around 39
                    mph.
Mixing height.......600 ft AGL.
Mixing winds........West around 10 mph shifting to the southeast in
                    the evening, then increasing to 20 to 25 mph
                    late in the evening increasing to around 30 mph
                    after 3 am.
Smoke dispersal.....56800 knot-ft early in the evening decreasing
                    to 9200 knot-ft late in the night.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........3      9      31     35     35     40
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............76     71     61     57     54     54
RH..............23     30     41     47     50     48
20 ft wind......E 5    E 10   SE 15  SE 20  SE 25  SE 25
20 ft wind gust.12     13     22     28     32     37
Mix hgt (ft)....8100   1400   600    700    1000   900
Mixing wind.....W 10   E 10   SE 15  SE 20  SE 25  SE 30
Vrate kt-ft/1K..57     13     9      13     22     24

.THURSDAY...

Sky/weather.........Mostly sunny (40-50 percent) then becoming
                    partly sunny (60-70 percent). Chance of rain
                    showers. Slight chance of thunderstorms late in
                    the afternoon.
Max temperature.....Around 81.
Min humidity........33 percent.
Wind (20 ft)........Windy. South winds around 30 mph shifting to
                    the southwest late in the afternoon. Gusts up
                    to 45 mph. Gusty and erratic winds expected
                    near thunderstorms late in the afternoon.
Mixing height.......5200 ft AGL.
Mixing winds........South 30 to 35 mph shifting to the southwest
                    around 25 mph late in the afternoon.
Smoke dispersal.....30600 knot-ft early in the morning increasing
                    to 108800 knot-ft in the afternoon increasing
                    to (112800 knot-ft) in the afternoon.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........42        47        72        69
Weather cov.....          CHANCE    CHANCE    CHANCE
Weather type....NONE      RNSHWR    RNSHWR    RNSHWR
Tstm cov........
Temp............54        60        71        79
RH..............48        44        36        34
20 FT wind......SE 30G40  S 30G41   S 30G41   S 30G36
Mix hgt (ft)....1100      2600      4400      4900
Mixing wind.....SE 30     S 35      S 35      S 30
Vrate kt-ft/1K..31        75        135       130

$$
Forecaster...AP
Requested by...Janet King
Type of request...PRESCRIBED
.TAG 2613512.0/FGF
.DELDT 05/12/26
.FormatterVersion 2.0.0
.EMAIL Janet.King2005.17@gmail.com