Moderate

At 1045 PM MDT, Doppler radar was tracking a cluster of strong thunderstorms 5 miles southwest of Seibert, moving east at 30 mph. HAZARD...Wind gusts of 50 to 55 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 outdoor objects is possible. This strong thunderstorm will be near... Seibert around 1050 PM MDT. Vona around 1100 PM MDT. This includes Interstate 70 in Colorado between mile markers 390 and 417.

At 1251 AM EDT, Doppler radar was tracking strong thunderstorms along a line extending from 7 miles southeast of Lawsonia to near Nassawadox. Movement was east at 35 mph. HAZARD...Wind gusts up to 40 mph and heavy rain. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Reduced visibility and minor flooding possible. Strong thunderstorms will be near... Exmore, Onancock, Parksley, Onley, Nassawadox, and Willis Wharf around 1255 AM EDT.

* WHAT...Heat index values up to around 108 expected. * WHERE...George, Greene, Perry, Stone, and Wayne Counties. * WHEN...From 11 AM to 8 PM CDT Sunday. * 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning

* WHAT...Heat index values up to 109 expected. * WHERE...Portions of northwest and west central Arkansas and east central, northeast, and southeast Oklahoma. * WHEN...From noon to 8 PM CDT Sunday. * IMPACTS...Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning

* WHAT...Temperatures 90 to 97. * WHERE...San Bernardino County Mountains above 6000 ft. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures 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...Temperatures 90 to 98 for Inland Orange County, 90 to 102 for the San Diego County Valleys, 100 to 107 for the Inland Empire and 89 to 100 in the mountains. Temperatures increase slightly for the middle and end of next week, making for a prolonged and dangerous stretch of heat. * WHERE...Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills.

At 1218 AM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Flag Harbor to 8 miles northwest of Tylerton. Movement was east at 30 mph. HAZARD...Wind gusts up to 40 mph and heavy rain. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Reduced visibility and minor flooding possible. Strong thunderstorms will be near... Deal Island around 1230 AM EDT. University Of Maryland Center For Environmental Studies around

* WHAT...Peak heat index values of 106 to 112 and temperatures generally in the 100 to 104 range in the afternoons. * WHERE...Portions of south central and southeast Texas. * WHEN...Until 7 PM CDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Locally higher heat index values are possible. If forecast heat indices and or temperatures trend higher, then an Excessive Heat Warning may be warranted. Drink plenty of fluids, stay in an air-conditioned room, stay out of

* WHAT...Temperatures between 105 to 109 degrees. * WHERE...A portion of the eastern and central Texas Panhandle. * WHEN...From noon to 8 PM CDT Sunday. * IMPACTS...Hot temperatures 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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat

At 927 PM PDT, Doppler radar was tracking a line of strong thunderstorms extending from 23 miles northeast of Headquarters to 43 miles south of Tarkio, or extending from 36 miles southwest of Superior to 32 miles west of Hamilton, moving northeast at 30 mph. HAZARD...Wind gusts up to 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Powell and Lolo Pass.