NDCMP Weather Forecast

District 1District 2
Transition (UTC)0505
FirstSecondThirdFirstSecondThird
Forecasted WeatherNO SIGNO SIGHAILNO SIGNO SIGHAIL

Forecaster: Daniel Brothers

Synopsis


An upper level ridge is trying to build to the west today. Despite this ridge developing other ingredients are coming together for thunderstorms overnight and for the next couple days. A SE surface flow is helping to maintain dew points in the mid to upper 50s over much of western ND. Some fog is very slowly burning off over the districts today and will help to limit daytime heating, but highs could still be in the upper 70s to mid 80s. There is some decent instability of D! during the day, but it remains somewhat capped and without any forcing mechanism to break through that cap. Thus there will be no significant weather during the day for either district.

However, a potent shortwave moving over the ridge is expected to force thunderstorms over central MT this afternoon. These storms will move fairly quickly across MT and into ND overnight, and should be able to maintain some hail threat with the aid of a LLJ and an axis of MUCAPE stretching across D1. The HRRR and UND WRF have these storms reaching ND between 05Z and 06Z. The NAM Nest is a couple hours later, but transition times will reflect the earlier timing. Another more potent wave moves through ND in the evening tomorrow, bringing another round of potential hail suppression operations.

7/7/21


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

NW flow over ND in front of the building ridge

Surface temps this afternoon.

Surafce dew points this afternoon

MLCAPE this afternoon over D1 is capped.

CAPE over D1 this afternoon

Less instability and a stronger cap over D2

A noticeable shortwave approaching the districts after midnight

A view of the vorticity associated with the shortwave

A weak but present LLJ overnight

MUCAPE overnight

NAM NEST simulated reflectivity for 07Z

05Z HRRR simulated reflectivity

UND simulated reflectivity at 06Z

07Z Bowman MUCAPE sounding

09Z Watford City MUCAPE sounding

The more potent wave approaching tomorrow afternoon

Tomorrow afternoon MUCAPE sounding in Bowman

NAM NEST simulated reflectivity tomorrow at 01Z

Tomorrow evening according to the HRRR


Indices


Lifted Index
(<1)
K index
(>30)
Total Totals
(>48)
Sweat
(>200)
Cape
(>125)
CIN
(>-100)
Bulk Richarson Number
(>3)
Helicity
(>125)
D1 -1.7 33.7 51.3 288 372 -158 3 111
ISN 1.4 24.4 45.5 155 0 0 0 5
MOT 2.3 26.9 45.4 178 0 0 0 51

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 31 22.6 35.4 42.2 -3.1 4
ISN 25 18.4 23 34.7 2 0
MOT 27 20.7 24.6 35.7 1.7 0

Weather Features

  • Cyclonic Vorticity Advection
  • Low Level Jet
  • Low-Level Moisture Advection (SE)
  • Short Wave Trough
  • Upper Level Ridge