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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.


Wednesday, June 7, 2023

SPC Jun 7, 2023 0600 UTC Day 1 Convective Outlook

LIVE MAP (ABOVE) ... SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1244 AM CDT Wed Jun 07 2023 Valid 071200Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE SOUTHERN HIGH PLAINS...NORTHWEST...NORTHERN PLAINS...LOWER TO MID MISSOURI VALLEY...CAROLINAS...AND FLORIDA.... ...SUMMARY... Marginally severe thunderstorms, associated with strong winds and hail, will be possible today across parts of the southern High Plains, Northwest, northern Plains, lower to mid Missouri Valley, Carolinas, and Florida. ...Southern Atlantic Seaboard... A cyclonic flow pattern will be in place today across much of the eastern U.S., with an upper-level low located in northern New England. At the surface, a trough will deepen along the Atlantic Seaboard as a cold front advances southward through the southern Appalachians. Ahead of the front, surface dewpoints will be in the mid to upper 60s F across much of the Southeast into the eastern Carolinas. Isolated to scattered thunderstorms are forecast to develop this afternoon along the surface trough. Additional storms may form near sea-breeze boundaries in the coastal Carolinas, and along the east coast of Florida. Steep low-level lapse rates near peak heating may be enough for a marginal wind-damage threat with the stronger multicells. ...Lower to Mid Missouri Valley/Northern Plains... A quasi-stationary front will be located from the eastern Dakotas south-southeastward into the lower Missouri Valley today. Along and to the east of the boundary, surface dewpoints in the lower to mid 60s F will contribute to a somewhat narrow corridor of moderate instability by afternoon. Isolated to scattered thunderstorm development is expected during the mid to late afternoon as instability and low-level convergence become maximized near the front. Marginally severe winds and hail will be possible, especially in areas were low-level lapse rates become the steepest. ...Southern High Plains... An upper-level ridge will remain in place today across the southern High Plains. Beneath the ridge, warm surface temperatures and steep lapse rates will contribute to moderate instability by afternoon. Thunderstorms are expected to form in the higher terrain of eastern New Mexico and far West Texas, with the storms moving slowly into the lower elevations during the mid to late afternoon. The instability, along with steep lapse rates, will likely support a threat for strong winds and hail. ...Northwest... An upper-level low will move slowly northeastward into the Sierra Nevada of eastern California today. To the north and east of the low, mid-level flow will be from the south and southeast across much of the Intermountain West. Scattered thunderstorms will likely develop this afternoon in the higher terrain, and in the lower elevations where temperatures sufficiently warm. Steep low to mid-level lapse rates will likely support a marginal wind-damage and hail threat. ..Broyles/Squitieri.. 06/07/2023 Read more CHECK UPDATE ZOOM GRAPHIC
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