NDCMP Weather Forecast

District 1District 2
Transition (UTC)311412
FirstSecondThirdFirstSecondThird
Forecasted WeatherNO SIGRAINNO SIGNO SIGTSRANO SIG

Forecaster: Mark Schneider

Synopsis


An omega block upper-level pattern remains in place today; however shortwave troughs continue to work through the northern periphery of our ridge. At the surface, a stationary front stretches from NE Wyoming northwestward into Central MT and this boundary isn't expected to move eastward until tomorrow into Thursday. Both districts are currently sitting between last night's shortwave trough and the next upstream shortwave, so conditions should remain capped during the daytime hours today. Tonight's setup includes a weaker shortwave that lifts northeastward through Montana towards District II. Convection in Central MT should develop throughout the evening and advect northeastward. Because western ND will be very capped during the overnight hours and the low level jet remains out west in E MT, convection is expected to weaken substantially to rain showers and TSRA and not pose a hail threat because of the sounding profiles. The 12Z HAILCAST run shows a blank slate as well for overnight/tomorrow morning. Everything should clear out of District II by around 12Z and return to NO SIG until brieifng tomorrow. District I looks to see only a few remnant rain showers late evening and overnight.

8/20/24


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

Surface_Analysis

850mb

700mb

500mb

300mb

250mb

3Z Williston Sounding

12Z Williston Sounding

Low Level Jet in Eastern MT

SPC Day1


Indices


Lifted Index
(<1)
K index
(>30)
Total Totals
(>48)
Sweat
(>200)
Cape
(>125)
CIN
(>-100)
Bulk Richarson Number
(>3)
Helicity
(>125)
D1 -0.7 26.6 54.1 259 -149 -392 2 0
ISN -4.9 29.3 55.1 337 1810 -47 33 50
MOT -0.8 28.5 49.3 204 -138 -358 2 40

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 29 25.5 27.3 35.2 -5.8 5.7
ISN 29 23.2 34.2 38.3 -5 1.3
MOT 28 21.7 29.3 37.8 -1.4 4.4

Weather Features

  • 700mb Temp > 13C
  • Short Wave Trough