Mesoscale Discussion 0598
NWS Storm Prediction Center Norman OK
0630 PM CDT Sat Apr 29 2017
Areas affected...Portions of southeastern MO and southern/central
IL/IN
Concerning...Severe Thunderstorm Watch 174...
Valid 292330Z - 300030Z
The severe weather threat for Severe Thunderstorm Watch 174
continues.
SUMMARY...Mainly a damaging wind threat continues across Severe
Thunderstorm Watch 174. Downstream watch issuance into Indiana is
possible.
DISCUSSION...A line of thunderstorms is moving eastward along a
stationary boundary in east-central IL as of 2330Z. This line has
produced multiple reports of strong/damaging winds over the past
several hours. The airmass downstream of this convection and
along/south of the boundary in central IN remains weakly to
moderately unstable, with MLCAPE ranging generally from 500-1500
J/kg, and veering low to mid-level flow should remain favorable for
continued maintenance with this line for at least the next several
hours as it moves into western/central IN. A downstream watch into
IN may be needed in the next hour or so depending on convective
trends. Farther south into southern IL and southeastern MO, the line
of thunderstorms has become roughly parallel to mid-level
southwesterly flow, and has made very slow southeastward progress.
While strong to locally damaging winds and marginally severe hail
remain possible across this region, they overall severe threat
should remain rather isolated with southward extent.
..Gleason.. 04/29/2017
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LMK...IND...PAH...ILX...LSX...
LAT...LON 39628889 40018841 40098685 39948558 38918560 38148682
38048795 37138926 36909087 37669051 38678917 39628889
Read morefrom SPC Forecast Products http://ift.tt/JDrhlr
No comments:
Post a Comment