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Harvey, North Dakota 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Harvey ND
National Weather Service Forecast for: Harvey ND
Issued by: National Weather Service Bismarck, ND
Updated: 6:50 pm CDT Aug 14, 2025
 
Tonight

Tonight: Mostly clear, with a low around 56. Northwest wind 6 to 16 mph.
Mostly Clear

Friday

Friday: Sunny, with a high near 76. Northeast wind 6 to 8 mph.
Sunny

Friday
Night
Friday Night: A 20 percent chance of showers after 1am.  Partly cloudy, with a low around 56. East wind 7 to 10 mph.
Partly Cloudy
then Slight
Chance
Showers
Saturday

Saturday: Sunny, with a high near 77. East wind 10 to 16 mph, with gusts as high as 24 mph.
Sunny

Saturday
Night
Saturday Night: Mostly cloudy, with a low around 58. East wind 10 to 15 mph, with gusts as high as 23 mph.
Mostly Cloudy

Sunday

Sunday: A 20 percent chance of showers.  Partly sunny, with a high near 77. Southeast wind 10 to 13 mph, with gusts as high as 20 mph.
Slight Chance
Showers

Sunday
Night
Sunday Night: A 30 percent chance of showers, mainly after 1am.  Mostly cloudy, with a low around 61. Southeast wind 7 to 11 mph, with gusts as high as 18 mph.
Chance
Showers

Monday

Monday: Mostly cloudy, with a high near 79. Southeast wind 6 to 8 mph.
Mostly Cloudy

Monday
Night
Monday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 61. East wind around 7 mph.
Slight Chance
T-storms

Lo 56 °F Hi 76 °F Lo 56 °F Hi 77 °F Lo 58 °F Hi 77 °F Lo 61 °F Hi 79 °F Lo 61 °F

Hazardous Weather Outlook
 

Tonight
 
Mostly clear, with a low around 56. Northwest wind 6 to 16 mph.
Friday
 
Sunny, with a high near 76. Northeast wind 6 to 8 mph.
Friday Night
 
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 56. East wind 7 to 10 mph.
Saturday
 
Sunny, with a high near 77. East wind 10 to 16 mph, with gusts as high as 24 mph.
Saturday Night
 
Mostly cloudy, with a low around 58. East wind 10 to 15 mph, with gusts as high as 23 mph.
Sunday
 
A 20 percent chance of showers. Partly sunny, with a high near 77. Southeast wind 10 to 13 mph, with gusts as high as 20 mph.
Sunday Night
 
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 61. Southeast wind 7 to 11 mph, with gusts as high as 18 mph.
Monday
 
Mostly cloudy, with a high near 79. Southeast wind 6 to 8 mph.
Monday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. East wind around 7 mph.
Tuesday
 
Mostly sunny, with a high near 83. South wind 5 to 7 mph becoming northeast in the morning.
Tuesday Night
 
Mostly clear, with a low around 62. Southeast wind around 7 mph.
Wednesday
 
Sunny, with a high near 86. South wind 7 to 10 mph.
Wednesday Night
 
Partly cloudy, with a low around 63. Southeast wind around 10 mph.
Thursday
 
Mostly sunny, with a high near 82.

 

Forecast from NOAA-NWS for Harvey ND.

Weather Forecast Discussion
791
FXUS63 KBIS 142349
AFDBIS

Area Forecast Discussion
National Weather Service Bismarck ND
649 PM CDT Thu Aug 14 2025

.KEY MESSAGES...

- Isolated to scattered severe thunderstorms are possible this
  afternoon and evening over eastern and portions of central North
  Dakota. Main hazards will be hail to the size of a golf ball
  and wind gusts to 70 mph.

- High temperatures today in the upper 80s to lower 90s combined
  with increasing relative humidity will bring elevated heat
  indices to south central and eastern North Dakota, approaching
  95 degrees. Today will be the warmest day of the period.

- Cooler temperatures early this weekend (near to slightly
  below normal for mid-August), followed by a gradual warming
  trend into next week. Daily/nightly chances for showers and
  thunderstorms remain forecast.

&&

.UPDATE...
Issued at 630 PM CDT Thu Aug 14 2025

Quiet weather continues across the area. The cold front has made
it`s way into the James River Valley. There is pretty strong
capping across the area which has hindered storm development in
central North Dakota. Thunderstorm chances continue to diminish
as instability decreases across the area. Decreased PoPs to
match current trends.

&&

.DISCUSSION...
Issued at 230 PM CDT Thu Aug 14 2025

Slightly northwesterly to near zonal flow is found over the
northern Plains as a transient shortwave ridge builds in from
the west. With this, today is anticipated to the be the warmest
day of the week, with highs broadly in the mid 70s northwest to
lower 90s in south central North Dakota. A weak, embedded
shortwave traversing the near northwesterly flow this afternoon
is lofting a cold front across the state, with scattered showers
developing along its length. The convective environment across
central and eastern North Dakota this afternoon is pretty good
on paper, with model MUCAPE values broadly exceeding 3000 to
4000 J/KG across the James River Valley and east, while 0-6 KM
bulk shear values are in a respectably high in the 40 to 50 knot
range. However, on- going mid-level warm air advection will
help maintain a fairly robust 850-750mb cap through much of this
afternoon. Considering how weak the forcing is anticipated to
be during this period, it seems unlikely that much convective
initiation will be found across the forecast are before this
evening. On the off chance a storm does manage to break through
the cap and become supercellular, we will continue to advertise
large hail up to the size of golf balls and wind gusts up to 70
MPH. The highest potential for this remains over the James River
Valley. By the mid to late evening, a slightly more energetic
upper level wave is anticipated to loft a surface trough across
the forecast area which, along with a general weakening of the
mid level cap after sunset, could allow for some more clustered
thunderstorms development over south central North Dakota
through the early overnight period. Though the environment is
anticipated to start stabilizing during this period, one of two
of these storms may become strong to severe, with hail up to the
size of ping-pong balls and wind gusts up to 70 MPH possible.
For today, SPC has placed much of eastern North Dakota,
including the southern James River Valley, into a level 2 of 5
risk for scattered severe thunderstorms, including a hatched 15%
risk for significant hail that just clips portions of our
forecast area. A small band of level 1 of 5 risk for isolated
severe thunderstorms is also found as far west as the Highway
83. Otherwise, today, light to moderate northwest winds from
around 10 to 15 MPH hour will turn northerly this evening and
then northeasterly overnight. Low temperatures tonight are
forecast from the 50s northwest to the mid 60s in the southern
James River Valley.

Southwesterly flow is then anticipated on Friday as the
influence from an upper level low over the Canadian Prairies
spreads south. A series of weak shortwaves traversing the
southwesterly flow through the weekend will continue to induce
near daily chances for widespread showers and thunderstorms each
day, mainly starting in the afternoon and lingering into the
early overnight period. With comparably cooler high temperatures
in the 70s to mid 80s broadly forecast this weekend severe
weather is generally not anticipated during this period at this
time, though a stronger storm or two is possible in the far
southwest Friday afternoon and evening. Most areas this weekend
should see at least a little drink of rain, with the calibrated
NBM probability of exceeding 0.25 inches of rain broadly from 20
to 40 percent across the north and west, and from 40 to 60
percent across south central North Dakota. The bulk of the
rainfall is anticipated to come on Sunday, when a slightly more
aggressive shortwave is due to traverse North Dakota.

Looking ahead into next week, the southwesterly flow pattern of
the northern Plains is expected to persist, if becoming
somewhat messy by the mid week period as high pressure builds
aloft over the southern Rockies and a Pacific trough starts to
cut across the Canadian Prairies. This pattern is anticipated to
allow near daily chances for showers and thunderstorms to
continue through much of the workweek, as well as increasing high
temperatures each day. The potential for severe weather returns
during the later half of the week as the aforementioned pacific
trough is progged by a slim majority of ensemble members
(approximately 55 percent) to close off and dig further south by
late Thursday into Friday. CSU machine learning is starting to
pick up on this trend as well, highlighting much of the forecast
area by Day 8 (Thursday) with a low probability for severe
hazards. On the other hand, a minority cluster of ensemble
members (approximately 45 percent) favor the high pressure
center over the southern Rockies to deflect the upper level
trough/low center further to the north, in which case the
potential for severe weather over the area would be lower. We
will continue to monitor forecast trends over the next week or
so.

&&

.AVIATION /00Z TAFS THROUGH 00Z SATURDAY/...
Issued at 630 PM CDT Thu Aug 14 2025

VFR conditions will continue across the area. Winds continue to
veer out of the north as a cold front moves through the region.
Winds will shift out of the southeast by tomorrow afternoon. There
is a very low chance of thunderstorms near KJMS as models have
pulled back on the probability of convection. Amendments will
be made if storms form.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

UPDATE...Johnson
DISCUSSION...Adam
AVIATION...Johnson
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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