Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0733 PM CDT Sun Aug 25 2019 Valid 260100Z - 261200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR THE CENTRAL DAKOTAS ARCING INTO NORTHEAST WYOMING... ...SUMMARY... Thunderstorms with isolated large hail and severe gusts are expected over the central Dakotas arcing westward into northeast Wyoming this evening. ...Northern Great Plains... Water-vapor imagery this evening shows an amplifying mid-level trough over MT which is forecast to reach the Dakotas late tonight. A couple of strong to severe thunderstorm clusters are over the central Dakotas this evening near a pre-frontal surface trough and other intensifying severe storms are located near a cold frontal segment over northeast WY. Both boundaries are forecast to move southeast tonight. The 00z North Platte, NE raob sampled a moisture-rich boundary layer (13 g/kg lowest 100mb mean mixing ratio) which likely extends into the central Dakotas. Moderate instability and the increasing westerly flow moving east through the base of the shortwave trough, will combine to favor storm organization and intensity through the evening. A longer-term risk for severe storms will probably occur with the northeast WY storms as they move east-southeastward into western SD and towards far northern NE on the leading edge of stronger mid-level forcing for ascent. Large hail and severe gusts are the primary risks with the stronger storms. A gradual diminishing in storm coverage and intensity are expected by the late overnight hours. ..Smith.. 08/26/2019Read more
from SPC Forecast Products http://www.spc.noaa.gov/products/outlook/day1otlk_0100.html
No comments:
Post a Comment