Subj : DAY1SVR: Day 1 Convective Outlook To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Mon Nov 04 2024 20:01:23 ACUS01 KWNS 042001 SWODY1 SPC AC 041959 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0159 PM CST Mon Nov 04 2024 Valid 042000Z - 051200Z ....THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING ACROSS PARTS OF NORTHEAST TEXAS...EASTERN OKLAHOMA...WESTERN ARKANSAS...AND SOUTHWEST MISSOURI... ....SUMMARY... Tornadoes (some strong), large hail, and severe thunderstorm gusts, are expected this afternoon into tonight from the Southern Plains into the Ozarks and mid Mississippi Valley. ....20Z Update... Ongoing tornado/damaging wind potential may further increase through mid/late afternoon across eastern Oklahoma into far western Arkansas/southwest Missouri, as well as parts of North Texas. This will be somewhat focused by a sub-synoptic surface wave across east-central Oklahoma, and within a zone of strengthening and increasingly confluent/convergent 850 mb flow through early evening. Farther to the west, severe potential will continue to gradually diminish from west to east, with lowered severe probabilities across central Oklahoma and western North Texas. ...Guyer.. 11/04/2024 ..PREV DISCUSSION... /ISSUED 1012 AM CST Mon Nov 04 2024/ ....OK/TX/MO/AR... Morning water vapor imagery shows a deep upper trough over the southern Rockies, with a strong mid/upper level jet rounding the base of the trough and moving into west TX. At the surface, the primary boundary extends from central OK southward into west-central TX. Strong southerly low-level winds to the east of the surface boundary will maintain a moist and moderately unstable air mass over a relatively wide area, leading to a rather active severe weather event later today as the upper speed max approaches. Morning convection and associated boundaries are complicating the forecast over central OK, leading to uncertainty how far west the intense convection can form. Nevertheless, pockets of daytime heating and dewpoints in the upper 60s will result in rapid thunderstorm development by early afternoon across east-central OK and parts of north TX. These storms will likely be a mix of linear/bowing structures and discrete supercells. Forecast soundings suggest low and deep layer shear profiles more than sufficient for tornadoes, along with damaging winds and some hail. Strong tornadoes will be possible. The activity will spread northeastward into the evening into parts of western MO/AR, with a continued risk of damaging winds and tornadoes (some strong) along the primary convective line, and discrete storms ahead of the line. $$ = = = To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. --- SBBSecho 3.20-Linux * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .