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, August 6, 2021

SPC Aug 6, 2021 1300 UTC Day 1 Convective Outlook

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0752 AM CDT Fri Aug 06 2021 Valid 061300Z - 071200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE NORTHERN/CENTRAL ROCKIES AND NORTHERN PLAINS AND OVER THE MIDWEST... ...SUMMARY... Isolated severe storms are possible over parts of the central and northern Rockies into the northern High Plains this afternoon/evening. A few strong to severe storms may also develop later today over parts of the Midwest. ...Northern/Central Rockies and Northern Plains... Early morning water vapor imagery features a readily apparent upper trough centered over the northern Intermountain region near the Oregon/Idaho border vicinity. Notable height falls will develop ahead of this feature as it progresses toward western Wyoming by early evening. This will be accompanied by a 50+ kt mid-level jet, which will coincide with focused large-scale forcing for ascent with the exit region of this speed max. Above-normal Precipitable Water values over intermountain areas/interior Wyoming combined with strong surface heating will contribute to destabilization with high-based thunderstorms developing and increasing through mid/late afternoon. With cloud bases expected near 3 km AGL, gusty winds with some potential for severe-caliber downbursts can be expected. As the upper trough approaches the High Plains, the low-level jet should strengthen across western Kansas into extreme south-central South Dakota tonight. This may contribute to longevity of thunderstorm activity as it propagates east along a warm advection corridor. Portions of the region will continue to be reevaluated for a possible Slight Risk upgrade in subsequent outlooks. ...Midwest/Upper Mississippi Valley... Late-night convection over the Upper Midwest has tended to further weaken/diminish overnight with multiple/scattered weak MCVs persisting this morning. As clouds thin/scatter today, diurnal boundary-layer heating is expected to aid destabilization such that new updrafts, and possible thunderstorm clusters, will redevelop/intensify later this afternoon. This should particularly be the case across northern Illinois/southern Wisconsin into northern Indiana/Lower Michigan. Gusty winds and perhaps some threat for hail can be expected with this activity. ..Guyer/Mosier.. 08/06/2021 Read more LIVE: spc.noaa.gov
http://dlvr.it/S58jjk