Temps | Gusts | WU KORD KPWK

CLICK for this month's BIG night sky ...




Cardinal SAT


MOBILE DEVICE? Turn sideways. Weather conditions directly above are near Lakefront. Top tabs refer to O'Hare (official).

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.


Sunday, September 19, 2021

SPC Sep 19, 2021 0600 UTC Day 1 Convective Outlook

SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1237 AM CDT Sun Sep 19 2021 Valid 191200Z - 201200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE NORTH-CENTRAL STATES... ...SUMMARY... Scattered strong storms are expected across parts of the eastern Dakotas and northwestern Minnesota from late Sunday afternoon onward, along with low-probability severe risk with a couple of stronger storms. ...Synopsis... While a weak upper-level circulation center drifts northward across the lower and middle Mississippi Valley within the broader eastern U.S. ridge, a large-scale upper trough is forecast to advance across the West. At the surface, a seasonably strong cold front is progged to advance southeastward across the Intermountain West and eastward into the northern -- at later the central -- Plains states through the end of the period. ...Eastern Dakotas and northeastern Nebraska to Minnesota/northwestern Iowa... As the aforementioned surface cold front advances across the Dakotas/Nebraska through the day, a capped pre-frontal warm sector should largely preclude surface-based convection. Most of the showers and storms should remain elevated, to the west of the advancing front. Eventually, a couple of late afternoon or evening storms may develop near the boundary -- in the eastern Dakotas/northern and western Minnesota vicinity, where hail and strong/gusty winds may approach severe levels in a couple of spots. Overnight, convection is expected to increase in coverage -- particularly behind but also along the front -- as the upper system advances eastward. As such, despite diminishing instability, risk for a few stronger storms becoming briefly severe may persist through the end of the period. ..Goss/Moore.. 09/19/2021 Read more LIVE:
SUNRISE AND SUNSET TIMES IN UTC (if you're not logged in to Google)
CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)