Weather Alerts For Marshall, OK

# HEADLINE -------------------- HEAT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING # DETAILS -------------------- WHAT Heat index values up to 105 expected. WHERE Logan and Payne Counties. WHEN From 1 PM this afternoon to 7 PM CDT this evening. IMPACTS Hot temperatures and high humidity may cause heat illnesses. ISSUED AT Wednesday, June 10, 2026 at 5:35 AM CDT ISSUED BY National Weather Service Norman OK HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. # AREAS AFFECTED -------------------- Logan, Payne Including the cities of Guthrie and Stillwater

There is a Marginal Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE UPPER MISSISSIPPI VALLEY AND MIDWEST SUMMARY Scattered to numerous severe thunderstorms with potential for large hail in excess of two inches in diameter, a few strong tornadoes and damaging winds with gusts over 75 mph are expected this afternoon and evening across parts of the Upper Mississippi Valley and Midwest. Upper Mississippi Valley/Midwest At mid-levels, a trough will move eastward into the central and northern Plains today, as the exit region of a jet streak overspreads the upper Mississippi Valley and Midwest. At the surface, a cold front will advance eastward across the northern Plains with a warm front moving into the western Great Lakes. Between these two fronts, a very moist airmass will be in place with surface dewpoints in the lower to mid 70s F. Early in the day, a line of strong thunderstorms is expected to develop in western Iowa near the western edge of the moist airmass. A potential for severe wind gusts will be possible with this line. Eastward across the moist sector, moderate to strong instability is expected to develop by midday as surface temperatures warm. This will help the line to grow upscale, potentially into a linear MCS, as it moves across southern Wisconsin and northern Illinois early this afternoon. Severe wind gusts and QLCS tornadoes will be possible along the stronger parts of this line segment. In the wake of the initial line segment, instability is expected to increase as moisture advection and surface heating take place. An instability axis is forecast to develop in the afternoon from eastern Missouri northward into eastern Iowa, where MLCAPE should increase into the 3000 to 3500 J/kg range. Thunderstorm development will be likely during the mid to late afternoon along a zone of low-level convergence from northern Missouri into central and eastern Iowa. Additional storms are expected to form further north into parts of far eastern Minnesota and western Wisconsin. RAP forecast soundings in the late afternoon from eastern Iowa into southwest Wisconsin have curved hodographs, with 0-6 km shear near 40 knots, and 0-3 km storm-relative helicity around 225 m2/s2. This environment will support supercells with tornado potential. A strong tornado or two will be possible as supercells move eastward in a strengthening low-level jet during the late afternoon and early evening. Large hail and wind damage will also be possible with supercells. From this cluster, a second severe line segment with damaging wind gusts is expected to develop. This line will likely impact parts of northeast Missouri and north-central Illinois. Further southwest across parts of northwest/north-central Missouri and northeast Kansas, scattered thunderstorm development is expected during the late afternoon and early evening. These storms will be located near an axis of strong instability, along which RAP forecasts suggest that 0-6 km shear will be in around 40 knots. In addition 700-500 mb lapse rates are forecast to be near 7.5 C/km. The environment should support large hail and severe wind gusts. Ohio Valley/Central Appalachians A moist and unstable airmass will be in place today across much of the region, with surface dewpoints in the lower to mid 70s F. Although large-scale ascent will be weak, isolated thunderstorms appear likely to develop in areas where low-level convergence becomes maximized. Forecast soundings across the Ohio Valley show steep low-level lapse rates during the afternoon and have enough deep-layer shear for a localized severe threat. A few of the stronger cells could produce isolated severe gust and hail.