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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.

ARLINGTON HEIGHTS WEATHER
O'Hare International Airport KORD (Arlington Heights South)
Chicago Executive Airport KPWK (Arlington Heights North)

Tuesday, April 15, 2025

SPC Apr 15, 2025 1630 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1630Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1114 AM CDT Tue Apr 15 2025

Valid 151630Z - 161200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE NORTHEAST...

...SUMMARY...
Isolated wind damage will be possible this afternoon across parts of
the Northeast.

...Northeast...
Within the base of an eastward-moving large-scale trough over the
eastern CONUS, a related 100+ kt midlevel jet streak will pivot
eastward across the Mid-Atlantic and Northeast today. Ascent in the
left-exit region of the jet will promote widely scattered,
low-topped convection across the Northeast through the afternoon.
Despite limited post-frontal boundary-layer moisture, diurnal
heating beneath very cold midlevel temperatures will continue to
steepen low-level lapse rates amid strengthening low/mid-level
winds. This environment will support locally damaging convective
wind gusts (45-60 mph) through the afternoon -- especially with any
small clusters/lines that can evolve.

...Four Corners into southern Colorado...
Isolated high-based thunderstorms are expected across parts of the
Four Corners and southern CO this afternoon, where midlevel moisture
atop a diurnally deepening boundary layer will yield inverted-V
profiles. As a result, a couple locally strong downbursts cannot be
entirely ruled out.

..Weinman.. 04/15/2025


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