MD 1736 CONCERNING SEVERE THUNDERSTORM WATCH 563… FOR PARTS OF NORTHWEST/WEST CENTRAL IOWA AND ADJACENT NORTHEASTERN NEBRASKA
Mesoscale Discussion 1736
NWS Storm Prediction Center Norman OK
1141 PM CDT Mon Jul 29 2024
Areas affected…parts of northwest/west central Iowa and adjacent
northeastern Nebraska
Concerning…Severe Thunderstorm Watch 563…
Valid 300441Z – 300645Z
The severe weather threat for Severe Thunderstorm Watch 563
continues.
SUMMARY…A compact, but well-organized cluster of storms is being
maintained across the Sioux City area, and it possible that this
activity may continue to pose a risk for strong to severe wind gusts
for at least a few more hours.
DISCUSSION…Despite the presence of strong lower/mid-tropospheric
inhibition, convection has become better organized in a compact
cluster now propagating across and east-southeast of the Sioux City
area. The associated surface cold pool included 2 hourly pressure
rises of 5.7 mb at Yankton during the 04Z obs, and a small MCV has
become well-defined. Given the 40 kt forward propagation of this
cluster, strong low-level inflow of moist boundary-layer air
characterized by CAPE in excess in excess of 2000 J/kg might still
continue to overcome the mid-level inhibition at least a few more
hours.
..Kerr.. 07/30/2024
…Please see www.spc.noaa.gov for graphic product…
ATTN…WFO…DMX…FSD…OAX…
LAT…LON 43129630 42539457 41559404 41439495 41919624 42109669
42229636 43129630
