NDCMP Weather Forecast

District 1District 2
Transition (UTC)206206
FirstSecondThirdFirstSecondThird
Forecasted WeatherNO SIGHAILNO SIGNO SIGHAILNO SIG

Forecaster: Grant Peterson

Synopsis


A chance of showers and isolated severe thunderstorms is expected again today. The timing of initial convection may be as early as the afternoon and more than likely continuing through the evening in both districts. A few could be strong to severe. The SPC has issued a marginal risk for a big portion of ND today. The main threats are hail and gusty winds. There is higher confidence for marginal hail in D2 but D1 is not necessarily out of the question.

A swift-moving upper level trough continues to coast through the Northern Great Plains. It is looking like both districts will be right under the axis of this trough at noon with the vort max set up to the east. Currently we are seeing around 500-1000 J/kg of most unstable CAPE but will decrease after midnight. All day we can expect a very moist enviornment with dewpoints in the upper 50s up to lower 60s. We also have some positive vorticity advection in the afternoon, inducing rising motion. The only thing that is unfavorable today is limited shear. As long as we have these three main ingredients (vertical forcing, moisture, and instability) our chances for storms are quite likely. As this trough propagates east we will be setting ourselves on the downstream side of the trough in the evening, bringing in negative vorticity advection which will decrease any chances for operations tomorrow.

Sunday and Monday we will warm up as a thermal ridge builds in from the southwest. We could see temperatures in the upper 80s and possibly touching 90 in D1! I am anticipating a fairly dry and warm forecast for Sunday.

6/22/24


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

SPC Severe Weather Outlook in ND

SPC HAIL Outlook

250 mb: Upper-level trough axis over ND at 17Z

250 mb: Upper-level trough coasts east and now both districts are on the downstream side of it at 9Z on Sunday

500 mb: Positive vorticity approaching D2 from Canada at 17Z

500 mb: PV advects into D2 at 0Z inducing rising motion

MUCAPE 500-1000 J/kg in both districts at 17Z

MUCAPE decreases in the overnight/early morning hours in both districts

Plenty of moisture at the surface with dewpoints expected to be in the upper 50's to low 60's in both districts for most of the day

00Z D1 Sounding: Marginal Severe with Severe Hail Indications

D2 00Z Sonding: Marginal Severe with Severe Hail Indications

NAMNST Reflectivity at 21Z

HRRR Reflectivity at 21Z

NAMNST Reflectivity at 0Z

HRRR Reflectivity at 0Z


NAMNST Reflectivity at 06Z


Indices


Lifted Index
(<1)
K index
(>30)
Total Totals
(>48)
Sweat
(>200)
Cape
(>125)
CIN
(>-100)
Bulk Richarson Number
(>3)
Helicity
(>125)
D1 -3.1 40.7 53.7 286 796 -8 11 99
ISN -2.6 23.8 52.9 275 511 -5 39 39
MOT -0.4 20.5 48.8 182 74 -31 1 72

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 35 22 43.8 51.3 -3.3 0.4
ISN 28 24.3 26.4 36.6 -2.8 0.4
MOT 25 23 20.9 33.4 0 1.4

Weather Features

  • Cyclonic Vorticity Advection
  • Surface Low
  • Thermal Ridge
  • Upper Level Trough