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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.

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

Saturday, April 19, 2025

SPC Apr 19, 2025 0100 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 0100Z Day 1 Outlook


Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0740 PM CDT Fri Apr 18 2025

Valid 190100Z - 191200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE SOUTHERN
PLAINS TO THE MID MISSISSIPPI VALLEY...

...SUMMARY...
Severe thunderstorms remain possible from parts of the southern
Plains northeastward through the mid Mississippi Valley tonight.
Large to very large hail should be the main hazard, especially
across the southern Plains where storms will be more concentrated.

...01z Update...

Extensive cloud cover has developed within broad southwesterly flow
from northern Mexico, northeast across the southern Plains into the
Mid-MS Valley region. This has suppressed warm-sector temperatures
across the southern Plains and the synoptic front has surged a bit
farther south than earlier expected. Net result is significant CINH
persists across the southern Plains and surface-based convection has
struggled to develop.

1km flow is expected to strengthen across the southern Plains later
this evening and this should aid elevated convection north of the
cold front that currently extends from near LBB-north of SPS-near
SGF. 00z sounding at OUN remains quite capped, but inhibition is
notably weaker downstream from SGF to ILX. Latest radar data
suggests a gradual increase in elevated convection across the
eastern TX Panhandle into far western OK. This activity should
gradually expand through the late-evening into the overnight hours.
Large hail is the primary risk with these elevated storms

Otherwise, some severe risk remains with any frontal convection that
evolves overnight downstream across the Mid-MS Valley into western
IN.

..Darrow.. 04/19/2025


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