SPC Jun 24, 2025 0100 UTC Day 1 Convective Outlook
SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0739 PM CDT Mon Jun 23 2025 Valid 240100Z - 241200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE LOWER TO MID MISSOURI VALLEY NORTHEASTWARD INTO THE GREAT LAKES... ...SUMMARY... Isolated severe wind gusts will be possible this evening from the southern and central Plains northeastward into the Great Lakes. A few severe gusts will also be possible in parts of northern Maine. ...Great Lakes/Mid to Upper Mississippi Valley/Lower to Mid Missouri Valley/ Southern and Central Plains... A large mid-level anticyclone
Heat Advisory issued June 23 at 7:58PM EDT until June 24 at 8:00PM EDT by NWS Grand Rapids MI
* WHAT...Heat index values up to around 100. * WHERE...Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN...Until 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Extreme Heat Warning issued June 23 at 3:35PM EDT until June 24 at 8:00PM EDT by NWS Detroit/Pontiac MI
* WHAT...Dangerously hot conditions with heat index values of 100 to 105 degrees. * WHERE...Genesee, Macomb, Oakland, and Wayne Counties. * WHEN...Until 8 PM EDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Heat Advisory issued June 23 at 3:35PM EDT until June 24 at 8:00PM EDT by NWS Detroit/Pontiac MI
* WHAT...Heat index values up to 102 degrees. * WHERE...A portion of southeast Michigan. * WHEN...Until 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Air Quality Alert issued June 23 at 3:20PM EDT by NWS Boston/Norton MA
The Massachusetts Department of Environmental Protection has issued an Air Quality Alert for Ground Level Ozone, from 11 AM to 11 PM EDT Tuesday. An Air Quality Alert means that Ground Level Ozone concentrations within the region may approach or exceed levels that are Unhealthy for Sensitive Groups. Air is unhealthy for sensitive children and adults, such as those with asthma, lung or heart disease, and older adults. Sensitive children and adults should limit prolonged outdoor activity. For additional information, please visit the Massachusetts Department of Environmental Protection website at: https://mass.gov/orgs/massachusetts-department-of-environmental- protection
Heat Advisory issued June 23 at 2:12PM EDT until June 24 at 8:00PM EDT by NWS Boston/Norton MA
* WHAT...Heat index values up to 105. * WHERE...Western Franklin MA, Western Hampden MA, and Western Hampshire MA Counties. * WHEN...Until 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Extreme Heat Warning issued June 24 at 12:23AM EDT until June 25 at 8:00PM EDT by NWS Mount Holly NJ
* WHAT...Dangerously hot conditions with heat index values up to 110 degrees expected. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. * WHEN...Until 8 PM EDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...The hottest temperatures and heat indices will occur through Tuesday. Low temperatures around 75 to 80 degrees and high humidity will not offer much relief from the heat at night.
Extreme Heat Warning issued June 23 at 9:15PM EDT until June 25 at 8:00PM EDT by NWS Wakefield VA
* WHAT...Dangerously hot conditions with heat index values of 110 or greater expected. * WHERE...In Maryland, Dorchester, Inland Worcester, Somerset, and Wicomico Counties. In Virginia, Northampton and Accomack Counties. * WHEN...Until 8 PM EDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Heat Advisory issued June 23 at 9:15PM EDT until June 25 at 8:00PM EDT by NWS Wakefield VA
* WHAT...Heat index values of 100 to 107 expected. * WHERE...Coastal Worcester County Maryland. * WHEN...Until 8 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Extreme Heat Watch issued June 23 at 8:53PM EDT until June 25 at 9:00PM EDT by NWS Baltimore MD/Washington DC
* WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 111 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 110 possible. * WHERE...DC and portions of central, north central, northeast, northern, and southern Maryland, and central and northern Virginia. * WHEN...For the Extreme Heat Warning, from 11 AM to 9 PM EDT Tuesday. For the Extreme Heat Watch, from Wednesday morning through Wednesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.