798
FNUS73 KFGF 182208
FWSFGF
SPOT FORECAST FOR 4 SQUARE MILE BLACKLINE...USWFS
NATIONAL WEATHER SERVICE GRAND FORKS ND
508 PM CDT SUN OCT 18 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON OCTOBER 19.
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.
DISCUSSION
WARM AND DRY CONDITIONS ARE EXPETED MONDAY (HIGHS IN THE LOWER
60S), THOUGH THE DAY WILL START OFF COOLER AND AROUND THE TIME OF
THE PRESCRIBED BURN (9AM) BUT ACTIVELY WARMING THROUGH MIDDAY.
MINIMUM RH VALUES BY THE AFTERNOON SHOULD BE NEAR 30% WITH A
CHANCE THEY DROP BELOW 30% IF TEMPERATURES WERE TO REACH THE
MIDDLE 60S. WINDS WILL BE MUCH LIGHTER THAN PREVIOUS DAYS, WITH
PREVAILING WINDS FROM THE SOUTHEAST 5-10 MPH, AND ONLY INFREQUENT
GUSTS TO 15 MPH. SURFACE WINDS DO BECOME MORE EASTERLY BY LATE
AFTERNOON BEFORE SHIFTING BACK TO THE SOUTHEAST IN THE EVENING.
HYSPLIT TRAJECTORY DATA WILL BE SHARED IN A SEPARATE E-MAIL.
MONDAY
SKY/WEATHER.........SUNNY (0-5 PERCENT).
MAX TEMPERATURE.....AROUND 62.
MIN HUMIDITY........30 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS AROUND 5 MPH.
MIXING HEIGHT.......3000 FT AGL.
MIXING WINDS........SOUTHEAST AROUND 10 MPH.
SMOKE DISPERSAL.....2800 KNOT-FT EARLY IN THE MORNING INCREASING TO
26900 KNOT-FT IN THE AFTERNOON.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........3 1 0 2 3 2 3 3 3
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............38 43 50 56 60 62 61 61 58
RH..............73 65 52 42 36 31 30 31 36
20 FT WIND DIR..E E SE SE SE SE E E E
20 FT WIND SPD..5 5 5 5 5 5 5 5 5
20 FT WIND GUST.8 11 11 12 12 12 12 12 12
MIX HGT (KFT)...0.3 0.5 0.9 1.5 2.3 2.8 2.9 3.0 2.3
MIXING WIND DIR.E E SE SE SE SE SE E E
MIXING WIND SPD.10 10 10 10 10 10 10 10 10
VRATE KT-FT/1K..3 4 8 12 16 20 23 27 21
MONDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....AROUND 42.
MAX HUMIDITY........100 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........SOUTHEAST 10 TO 15 MPH SHIFTING TO THE SOUTH
AFTER 3 AM.
SMOKE DISPERSAL.....(4000 KNOT-FT).
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........4 5 6 12 27 20 15 16 6 5 3 11
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............54 51 49 48 46 45 45 44 44 43 43 43
RH..............43 50 56 58 60 65 68 73 76 86 89 89
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE SE SE SE
20 FT WIND SPD..5 5 5 5 5 10 10 10 10 10 10 10
20 FT WIND GUST.11 12 13 14 14 15 14 15 15 15 16 16
MIX HGT (KFT)...0.6 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.5 0.5
MIXING WIND DIR.E E E E SE SE SE SE SE SE S S
MIXING WIND SPD.10 15 15 15 15 15 15 15 15 15 15 15
VRATE KT-FT/1K..6 4 5 6 6 6 5 6 5 6 6 6
TUESDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 64.
MIN HUMIDITY........58 PERCENT.
WIND (20 FT)........SOUTH WINDS AROUND 10 MPH WITH GUSTS TO AROUND
22 MPH.
MIXING HEIGHT.......3800 FT AGL.
MIXING WINDS........SOUTH 15 TO 20 MPH.
SMOKE DISPERSAL.....5800 KNOT-FT EARLY IN THE MORNING INCREASING TO
66200 KNOT-FT IN THE AFTERNOON.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 19 38 26 13 13 14 14 15 15 16 13
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............43 43 42 45 49 53 57 61 63 64 64 63
RH..............93 100 100 100 93 83 72 62 58 58 58 60
20 FT WIND DIR..SE SE SE S S S S S S S S S
20 FT WIND SPD..10 10 10 10 10 10 10 10 10 10 10 10
20 FT WIND GUST.16 16 18 19 19 20 21 22 22 22 21 19
MIX HGT (KFT)...0.5 0.5 0.6 0.8 1.2 1.8 2.6 3.2 3.6 3.8 3.5 2.7
MIXING WIND DIR.S S SE S S S S S S S S S
MIXING WIND SPD.15 15 15 15 15 20 20 20 20 20 20 15
VRATE KT-FT/1K..6 6 7 11 17 29 43 54 63 66 60 41
FORECASTER...DJR
REQUESTED BY...BRADLEY OEN
TYPE OF REQUEST...PRESCRIBED
.TAG 2623989.0/FGF
.DELDT 10/18/26
.FORMATTERVERSION 2.0.0
.EMAIL JASON_WESTHOLTER@FWS.GOV,BRADLEY_OEN@FWS.GOV,ERIC_MARK@FWS.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page