Moderate

At 614 AM CDT, Doppler radar was tracking a strong thunderstorm near Blair, or 11 miles southeast of Whitehall, moving northeast at 45 mph. HAZARD...Wind gusts up to 50 mph and nickel size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. This strong thunderstorm will be near... Merrillan and Alma Center around 630 AM CDT. Hatfield around 640 AM CDT.

Early season heat is upon us, with forecasted high temperatures for today and Thursday near 90 degrees. Dew points into the 70s will bring heat indices to between 95 to 104 degree range during peak heating both days. Use the following safety tips for facing the heat safely: * Stay hydrated, avoiding alcohol and drinks with heavy caffeine or sugar. * Dress in loose fitting clothing, light in color. * Take advantage of shade and air conditioning when possible.

The combination of temperatures in the upper 80s to around 90 and high humidity will result in the heat index reaching 95 to 100 today and then again on Thursday. With these being the first hot days of the year, it may take some time to get acclimated to these conditions. So be extra cautious and take precautions to deal with the heat. If planning to be outdoors for extended periods drink plenty of water, where light and loose clothing, and take frequent breaks.

At 531 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Jump River to 9 miles southeast of Sheldon to near Stanley. Movement was northeast at 70 mph. HAZARD...Wind gusts up to 40 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Strong thunderstorms will be near... Jump River around 535 AM CDT.

At 633 AM EDT, Doppler radar was tracking a strong thunderstorm over Hamlin, moving east at 40 mph. HAZARD...Wind gusts up to 40 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Nitro, Hamlin, Jefferson, South Charleston, St. Albans, Dunbar, Alum Creek, Institute, Tornado, West Hamlin, Sweetland, Sod, Griffithsville, and Yawkey.

* 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. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Heat index values of 105 to 108 expected. * WHERE...Portions of central, northern, northwest, and western Oklahoma. * WHEN...From 1 PM this afternoon to 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Sub-freezing temperatures of 27 to 32 expected. * WHERE...Northern and Eastern Klamath County and Western Lake County, including Chemult, Crescent, Sprague River, Bly, and Winter Rim. * WHEN...Until 8 AM PDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Take steps now to protect tender plants from the cold.

* WHAT...Visibility one quarter to one quarter mile in dense fog. * WHERE...Langlade, Florence, Forest, Menominee, and Shawano Counties. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Manitowoc, Door, Kewaunee, Northern Marinette County, Northern Oconto County, Southern Marinette County, and Southern Oconto counties. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...The lowest visibility will be closer to the bay and lake. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.