Red Flag Warning issued June 21 at 4:40AM MST until June 22 at 8:00PM MST by NWS Flagstaff AZ
MST Sat Jun 21 2025/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST /9 PM MDT/ SATURDAY FOR MOST OF NORTHERN ARIZONA... ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM MST /NOON MDT/ TO 8 PM MST /9 PM MDT/ SUNDAY FOR NORTHEAST ARIZONA... * AFFECTED AREA...Locations near Buffalo Pass, Chinle, Dilkon, Eagar-Springerville, Ganado, Holbrook, Kayenta, Kykotsmovi, Saint Johns, Shonto, Snowflake-Taylor, Tuba City, Window Rock and Winslow. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...The combination of gusty winds and low humidity can cause
Red Flag Warning issued June 21 at 4:40AM MST until June 21 at 8:00PM MST by NWS Flagstaff AZ
* AFFECTED AREA...Locations near Alpine, Doney Park, Flagstaff, Forest Lakes, Fredonia, Grand Canyon, Heber-Overgaard, Jacob Lake, North Rim, Page, Pinetop-Lakeside, Prescott, Prescott Valley, Seligman, Show Low, Valle, Whiteriver and Williams. This includes portions of the Apache-Sitgreaves National Forest, Coconino National Forest, Kaibab National Forest, Prescott National Forest and Tonto National Forest. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 11 percent. * IMPACTS...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity before first responders can contain them.
Wind Advisory issued June 21 at 4:17AM MST until June 21 at 8:00PM MST by NWS Flagstaff AZ
* WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Navajo Nation in Arizona, Little Colorado River Valley, Kaibab Plateau, Grand Canyon Country, Coconino Plateau, Yavapai County Mountains, and Western Mogollon Rim. * WHEN...From 8 AM MST /9 AM MDT/ this morning to 8 PM MST /9 PM MDT/ this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could snap resulting in a few power outages. Travel will be difficult, especially for high profile vehicles.
Red Flag Warning issued June 21 at 1:12AM MST until June 21 at 8:00PM MST by NWS Phoenix AZ
* AFFECTED AREA...Southern Gila County/Tonto National Forest Foothills. * TIMING...In effect until 8 pm MST Saturday evening. * WINDS...Southwest 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Fuels are very dry and fire danger is very high. These conditions combined with low relative humidity and strong winds will lead to widespread hazardous fire weather conditions.
Extreme Heat Warning issued June 21 at 2:04AM EDT until June 24 at 8:00PM EDT by NWS Boston/Norton MA
* WHAT...Dangerously hot conditions with heat index values up to 110 expected. * WHERE...Much of Southern New England, except for the Berkshires, Cape Cod and the Islands. * WHEN...From 11 AM Sunday to 8 PM EDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Heat Advisory issued June 20 at 10:58PM CDT until June 21 at 8:00PM CDT by NWS Sioux Falls SD
* WHAT...Heat index values up to 105. * WHERE...Portions of central, east central, south central, and southeast South Dakota. * WHEN...Until 8 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Heat Advisory issued June 21 at 2:23AM EDT until June 24 at 8:00PM EDT by NWS Cleveland OH
* WHAT...Heat index values up to 104 expected. * WHERE...Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN...From noon Sunday to 8 PM EDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events, particularly for those working or participating in outdoor activities. * ADDITIONAL DETAILS...Consecutive days of excessive heat and humidity combined with little relief overnight due to very warm low temperatures can be especially hazardous. The heat may continue into Wednesday.
Extreme Heat Warning issued June 21 at 2:06AM EDT until June 25 at 8:00PM EDT by NWS Mount Holly NJ
* WHAT...Dangerously hot conditions with heat index values up to 108 expected. * WHERE...Portions of east central and southeast Pennsylvania. * WHEN...From 8 AM Sunday to 8 PM EDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...The highest temperatures and heat indices will be Monday and Tuesday. Low temperatures near 75 to 80 degrees will not offer much relief at night.
Heat Advisory issued June 21 at 2:06AM EDT until June 24 at 8:00PM EDT by NWS Mount Holly NJ
* WHAT...Heat index values up to 104 expected. * WHERE...Carbon and Monroe Counties. * WHEN...From 8 AM Sunday to 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Low temperatures in low to mid 70s will not offer much relief at night.
Extreme Heat Warning issued June 21 at 1:28AM EDT until June 25 at 8:00PM EDT by NWS Pittsburgh PA
* WHAT...Dangerously hot conditions with heat index values up to 106 expected. * WHERE...Beaver, Fayette, Washington, Allegheny, Butler, and Westmoreland Counties. * WHEN...From 11 AM Sunday to 8 PM EDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.