NDCMP Weather Forecast

District 1District 2
Transition (UTC)28010
FirstSecondThirdFirstSecondThird
Forecasted WeatherNO SIGHAILNO SIGNO SIGHAILNO SIG

Forecaster: Lynnlee Rosolino

Synopsis


All conditions seem to be right today for severe weather. A surface low pressure system moving Northeast from Wyoming along with a short wave propagating East from Montana provide a substantial forcing for significant weather. Dewpoints will be in the mid-60s and there is sufficient precipitable water in the atmosphere. CAPE values are in the 2000-3000s in both districts, which is ideal for severe weather. Some warm air advection trailing the low will provide some extra lift as the warm air rises.

Beginning around 0Z in D2 a westward propagating cell will briefly move into the Northwest of the district. As that storm weakens and moves out of district a set of storms potentially developing into a squall line as it moves through will move in from Eastern Montana. These storms have a very high probability of producing hail. They should move out by 10Z. D1 will get a line of storms beginning around 2Z. This line of storms will migrate in from South Dakota and move through the district by 8Z.

6/8/21


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

The low pressure system in Wyoming could initiate significant weather

A shortwave passing through could further iniate significant weather

Dewpoints are very high across the region leaving significant precipitable water in the atmosphere

CAPE values will be very high most of the forecast period

Warm air advection influences lift in the atmosphere

High helicity values indicate potential for severe weather

Large hail is forecasted to hit D2

The low pressure system moving through will cause decent mid-level wind speeds.

Both districts have an outlook for hail from the SPC

The SPC issued an outlook for high wind speeds

The SPC tornado outlook includes both districts with an increased risk in D2


Indices


Lifted Index
(<1)
K index
(>30)
Total Totals
(>48)
Sweat
(>200)
Cape
(>125)
CIN
(>-100)
Bulk Richarson Number
(>3)
Helicity
(>125)
D1 -6.5 43.8 59.9 595 2444 -50 94 99
ISN -8.4 40.5 60.1 496 3126 -39 30 366
MOT -5.5 46.8 55 526 2657 -31 81 190

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 36 22.1 50.3 52.9 -6.5 1.7
ISN 36 26.7 48.9 50.7 -8.4 1.3
MOT 38 23.6 52.3 54.7 -5.5 1.1

Weather Features

  • Jet Stream (PVA) RRQ or LFQ
  • Short Wave Trough
  • Upper Level Ridge