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Archives for the SPC Convective Outlook are updated daily (approximately) with a live map at the beginning of each article. Follow the link at the end of the article to check for current updates on the NOAA/NWS Storm Prediction Center website. Also, see Archives for Chicago's hourly weather data on CARDINAL NEWS Magazine.


Thursday, April 20, 2023

SPC Apr 20, 2023 0600 UTC Day 2 Convective Outlook

LIVE MAP (ABOVE) ... SPC 0600Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1240 AM CDT Thu Apr 20 2023 Valid 211200Z - 221200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE TEXAS COASTAL PLAIN...LOWER MISSISSIPPI VALLEY AND CENTRAL GULF COAST... ...SUMMARY... Marginally severe thunderstorms associated with isolated damaging winds and hail will be possible on Friday from parts of the Texas Coastal Plain east-northeastward into the central Gulf Coast states. ...Texas Coastal Plain/Lower Mississippi Valley/Central Gulf Coast... An upper-level trough will move across the southern Plains on Friday, as an associated 60 to 80 knot mid-level jet digs southeastward into the southern Plains. At the surface, a cold front will advance southeastward across the Texas Coastal Plain and lower Mississippi Valley. At the start of the period, the front is forecast to be in the Texas Hill Country and Ark-La-Tex. Scattered thunderstorms will likely be ongoing across the moist sector in parts of east Texas and Louisiana. The stronger cells could have an isolated wind-damage and hail threat. Some models suggest the storm cluster will move eastward toward the central Gulf coast during the morning. This would likely hamper destabilization across parts of the lower Mississippi Valley. Further to the west, moderate instability is forecast across much of the Texas Coastal Plain by late morning. Isolated to scattered thunderstorms may develop near the front or in the post-frontal airmass during the afternoon. Moderate deep-layer shear and steep low-level lapse rates could result in an isolated wind-damage threat. However, cold air advection in the wake of the front will likely decrease instability across the Texas Coastal Plain during the mid to late afternoon, minimizing any severe threat. ..Broyles.. 04/20/2023 Read more CHECK UPDATE ZOOM GRAPHIC
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