NDCMP Weather Forecast

District 1District 2
Transition (UTC)61200
FirstSecondThirdFirstSecondThird
Forecasted WeatherRAINNO SIGNO SIG

Forecaster: Daniel Brothers

Synopsis


We continue to be in a mostly zonal flow at upper levels, with some wobbles into a somewhat SW flow over the next week or two. This pattern is generally favorable for periodic chances of convection. Today we see a continued surface flow from the east, bringing better low level moisture to the district. Dew points will remain generally in the 50s for the next several days, and maybe even the 60s on Sunday. The shortwave that passed over last night is broadening out and stalling on the north side of a surface low that is passing through SD today. As the system stalls we have good synoptic lift over ND. Low-level convergence in MT is resulting in continued cloud development that is pushed over the district, with just enough forcing for occasional showers in generally cloudy skies today. It looks like the clouds will hang around for the entire forecast period, but the periodic showers taper off by midnight. Tomorrow evening another notable shortwave approaches western ND in the evening. A bit of a LLJ also develops after sunset and may provide adequate forcing for some storms. Eleveated instability is enough to support storms, but timing and placement are an issue. The HRRR is a few hours quicker than the NEST, which lines up the ingredients better for storms. The NEST is later and shows storms weakening before reaching ND. The placement of the LLJ also suggests the best forcing may be just a bit north of the district.

6/12/25


Flash Flood Guidance (Click Image for 1hr, 3hr, & 6hr Graphics)

00Z 250mb winds show continued zonal flow

00Z Surface temp shows roughly easterly flow

21Z Surface Dew Points in the 50s

00Z 500mb vorticty shows broad positive vorticity, but limited PVA

A broad area of low level convergence exists in MT

A broad area of low level convergence exists in MT

00Z 500mb temps are still warm

Low-level cloud cover lingers for much of the day and overnight, with no instability

The bulk of the precip is to the North and East of the district, but periodic ligth showers are still expected

The bulk of the precip is to the North and East of the district, but periodic ligth showers are still expected

Most of the showers should stop in district by around midnight

Most of the showers should stop in district by around midnight

There is a decent amount of elevated instability tomorrow night

A 500mb shortwave approaches the district tomorrow night

There is a notable LLJ pocket near district tomorrow night, though the best forcing may be just a bit north

HRRR simulated reflectivity for tomorrow night at 05Z

The NEST is a few hours slower than the HRRR with the wave, which results in weaker convection tomorrow night



Indices


Lifted Index
(<1)
K index
(>30)
Total Totals
(>48)
Sweat
(>200)
Cape
(>125)
CIN
(>-100)
Bulk Richarson Number
(>3)
Helicity
(>125)
D1 3.2 25.6 40 205 0 0 0 206
ISN 0 0 0 0 0 0 0 0
MOT 0 0 0 0 0 0 0 0

Jefferson Index
(>28.5)
Cross Totals
(>18.65)
Thompson Index
(>28.5)
S Index
(>35.8)
Showalter Index
(<=0.5)
Cap Strength
(0-2.65°C)
D1 26 19.9 22.4 29.3 4.6 0
ISN 0 0 0 0 0 0
MOT 0 0 0 0 0 0

Weather Features

  • Cyclonic Vorticity Advection
  • Low-Level Moisture Advection (SE)
  • Stationary Front
  • Surface Low
  • Zonal Flow