NDCMP Weather Forecast

District 1District 2
Transition (UTC)193204
FirstSecondThirdFirstSecondThird
Forecasted WeatherNO SIGHAILRAINNO SIGHAILTSRA

Forecaster: Jacob Azriel

Synopsis


Heat ushers in August. Conditional threat for hail today!


A surface low pressure system along with a warm front will move eastward into the region today providing weaking forcing. Some forcing aloft with both districts located in the front left quadrant of a jet streak. Weak shortwave will approach from the west and bring mainly flat topped showers overnight into tomorrow morning.

D1...

Lots of moving parts today in D1 for a conditional hail threat this afternoon and evening. Dry air will begin to filter into the district shortly bringing dewpoints down into the low 40s maybe even into the 30s. Warm air advection along with moisture advection could help bring in some more moist air. CAPE will also be lackluster with values only around 500 J/kg. Another limiting factor could be smoke that has started filtering in from the west, this could cause dry air entrainment. However, if storms develop they could easily produce large hail due to very steep lapse rates and dry midlevels. Bases should be pretty high today with the LCL as high as 13,000 ft AGL, which may also limit any rain that falls from these storms. Showers will be possible late tomorrow morning, but should remain pretty stratiform so I would not expect operations.

Operations possible 1-9p.


D2...

In D2, there will be much better conditions for thunderstorms overall. Dew points will be in the upper-50s to even mid-60s, LCLs will be lower around 5,000 ft AGL, there will be much more CAPE (1,000-1,500 J/kg), and steep lapse rates. However, the big limiting factors will be strong capping and lack of forcing. The warm front and low pressure system will likely stay just south or in the southern half of the district. This means without any forcing, it is unlikely (but not impossible) for the cap to be broken. D2 will have to closely monitor weather conditions this afternoon and evening. Showers and even a thunderstorm will develop into the overnight and early morning hours as that front and low push north. Operations during this second TSRA period is unlikely as they should stay fairly flat topped, but should be monitored.

Operations possible 2-10p.


Looking ahead... Hot weather continues this week. Showers and a isolated thunderstorm possible tomorrow across both distircts will remain mostly non-convective into the midday. If clearing can occur, especially in D2, convection could fire in the afternoon/evening giving another day favorable for operations.

8/1/22


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

Surface forecast map at 18z

Surface Temperatures at 21z

Surface Dew Points at 21z

200 mb map from 12z this morning

500 mb chart at 0z

Most Unstable CAPE at 20z

Mixed-Layer CIN at 17z

LCL at 20z

D1 NAM Nest Sounding at 20z

D2 NAM Nest Sounding at 20z


Indices


Lifted Index
(<1)
K index
(>30)
Total Totals
(>48)
Sweat
(>200)
Cape
(>125)
CIN
(>-100)
Bulk Richarson Number
(>3)
Helicity
(>125)
D1 0.8 25.4 49.1 81 0 0 0 4
ISN -3.4 25.9 54.4 333 1129 -139 14 107
MOT -4.4 40.4 54.4 341 1595 -49 12 263

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 24 10.3 24.6 33.9 0.7 0
ISN 27 22.4 29.3 34.1 -4.6 3.4
MOT 34 22.1 44.8 49.1 -4.3 1.5

Weather Features

  • Cyclonic Vorticity Advection
  • Jet Stream (PVA) RRQ or LFQ
  • Low-Level Moisture Advection (SE)
  • Surface Low
  • Upper Level Ridge
  • Warm Front