Moderate

* WHAT...Heat index values up to 106 expected. * WHERE...A portion of northeast 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 or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

* WHAT...Heat index values up to 106 expected. * WHERE...Portions of central, northern, and northwest Oklahoma. * WHEN...From 1 PM to 7 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.

* WHAT...For the Extreme Heat Warning, dangerously hot conditions. Afternoon temperatures 107 to 113. Major Heat Risk. For the Blowing Dust Advisory, visibility between one-quarter and one mile in blowing dust expected. * WHERE...Gila Bend, Northwest Pinal County, Sonoran Desert Natl Monument, and West Pinal County. * WHEN...For the Extreme Heat Warning, until 8 PM MST this evening. For the Blowing Dust Advisory, from 4 PM this afternoon to 9 PM MST this evening.

* WHAT...For the Extreme Heat Warning, dangerously hot conditions. Afternoon temperatures 109 to 111. Major Heat Risk. For the Blowing Dust Advisory, visibility between one-quarter and one mile in blowing dust expected. * WHERE...South Mountain/Ahwatukee and Southeast Valley/Queen Creek. * WHEN...For the Extreme Heat Warning, until 8 PM MST this evening. For the Blowing Dust Advisory, from 4 PM this afternoon to 9 PM MST this evening. Overexposure can cause heat cramps and heat

At 947 AM MDT, Doppler radar was tracking a cluster of strong thunderstorms 31 miles northeast of Green River, moving northeast at 30 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. This storm will remain over mainly rural areas of southeastern Uintah and northwestern Grand Counties. Frequent cloud to ground lightning is occurring with this storm.

At 939 AM MDT, Doppler radar was tracking a strong thunderstorm 11 miles north of Castle Valley, moving northeast at 30 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... Cisco. This includes Utah 128 between mile markers 17 and 43. If outdoors, consider seeking shelter inside a building.

At 819 AM MST /919 AM MDT/, Doppler radar was tracking a strong thunderstorm 10 miles northwest of Tuba City, moving northeast at 25 mph. HAZARD...Wind gusts up to 50 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Mainly rural areas of Coconino County. This includes U.S. Highway 89 between mile markers 484 and 499.

* WHAT...Visibility 1/4 miles or less in dense fog. * WHERE...The Sonoma County valleys, especially along Highway 101 from Healdsburg to Novato. * WHEN...Until 10 AM PDT 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.

At 910 AM MDT, Doppler radar was tracking a strong thunderstorm 15 miles northwest of Fish Springs Wildlife Refuge, or 45 miles west of Dugway English Village, 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 damage to outdoor objects is possible. Locations impacted include... Dugway Proving Ground Test Range and Fish Springs Wildlife Refuge.

* WHAT...Hot daytime conditions with high temperatures between 85 and 103 common. Warm overnight conditions will bring less relief than usual. * WHERE...Most valleys of Los Angeles and Ventura Counties. * WHEN...Until 8 PM PDT this evening. * 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. Do not leave young children and pets in unattended vehicles. Limit strenuous activities