DarkSky Temps | Gusts | WU KORD Data

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

RADAR FULL MAP SCREEN

NEXRAD

STORMTRACK

Cardinal SAT

CHGOWX.COM


Archives for Chicago's hourly weather data updated 24-48 hours after end of each day. MOBILE CHGOWX.COM ...
Weather conditions on bar directly above are near Lakefront. Weather conditions with Moon are O'Hare (official).

Friday, July 9, 2021

SPC Jul 9, 2021 1630 UTC Day 1 Convective Outlook

SPC 1630Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1134 AM CDT Fri Jul 09 2021 Valid 091630Z - 101200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS OVER SOUTHERN IOWA...NORTHERN MISSOURI AND WEST-CENTRAL ILLINOIS... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF THE MID-ATLANTIC... ...SUMMARY... Thunderstorms, some with potentially significant severe weather, are expected this afternoon into tonight across parts of the lower Missouri Valley westward into the parts of the north-central High Plains. ...IA/IL/MO... Residual clouds/showers and thunderstorms persist across the area from overnight convection, however strong heating this afternoon of a very moist air mass is expected to result in strong instability south of a developing warm front. Elevated thunderstorms may develop this afternoon over northern IA and pose a risk for large hail, however the primary concern is with supercell storm development near the warm front late this afternoon or perhaps early evening. Steep mid-level lapse rates and 40-45 kts of effective shear will result in a risk for all hazards, including the potential for very large hail and isolated tornadoes. These storms should evolve into a southeast-moving complex during the evening with an increasing risk of widespread damaging winds, with potentially significant severe gusts. ...WY/NE... Thunderstorm development is expected this afternoon near the higher terrain of WY/northeast CO, with very steep mid-level lapse rates and moderate MLCAPE supporting a supercell storm mode with a risk for very large hail and damaging winds, and perhaps a couple of tornadoes. Aided by a developing low-level jet, storms are expected to move east/southeast across much of NE and northern KS tonight with a continued severe wind/hail risk. ...Mid-Atlantic/Northeast U.S.... Tropical Storm Elsa was located over eastern Long Island and continuing to move northeast. The risk for a tornado or two over southeast New England should end by mid afternoon as the more favorable environment for brief tornadoes shifts northeast and offshore. A cold front will move east across the northeast and mid-Atlantic states this afternoon and tonight as a shortwave trough over the Great Lakes also shifts east. Scattered thunderstorms are expected to develop ahead of the front in a moderately unstable air mass this afternoon/evening. Effective shear averaging around 25-30 kts will promote organized storms in the form of multicells, and eventually a few clusters with a risk for mainly damaging winds. Have introduced a focused SLGT Risk for this afternoon over portions of the mid-Atlantic region where a higher concentration of storm coverage may exist. ..Bunting/Jirak.. 07/09/2021 Read more LIVE: spc.noaa.gov
http://dlvr.it/S3Ps3W