Extreme Heat Warning issued June 21 at 3:42PM EDT until June 24 at 8:00PM EDT by NWS Boston/Norton MA
* WHAT...Dangerously hot conditions with heat index values up to 108 expected. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern and southern Rhode Island. * 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 21 at 2:28PM EDT until June 24 at 8:00PM EDT by NWS Albany NY
* WHAT...For the first Heat Advisory, heat index values up to 96 degrees expected. For the second Heat Advisory, heat index values 95 to 105 degrees expected. * WHERE...In Connecticut, Northern Litchfield County. In New York, Western Schenectady, Montgomery, Southern Fulton, and Southern Herkimer Counties. In Vermont, Eastern Windham County. * WHEN...For the first Heat Advisory, from 11 AM to 8 PM EDT Sunday. For the second Heat Advisory, from 11 AM Monday to 8 PM EDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Extreme Heat Warning issued June 21 at 2:28PM EDT until June 24 at 8:00PM EDT by NWS Albany NY
* WHAT...For the Heat Advisory, heat index values between 100 and 104 degrees expected. For the Extreme Heat Warning, dangerously hot conditions with heat index values between 105 and 110 degrees expected. * WHERE...In Connecticut, Southern Litchfield County. In New York, Eastern Dutchess, Eastern Ulster, and Western Dutchess Counties. * WHEN...For the Heat Advisory, from 11 AM to 8 PM EDT Sunday. For the Extreme Heat Warning, from 11 AM Monday to 8 PM EDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
Heat Advisory issued June 21 at 2:28PM EDT until June 22 at 8:00PM EDT by NWS Albany NY
* WHAT...For the Heat Advisory, heat index values between 100 and 104 degrees expected. For the Extreme Heat Warning, dangerously hot conditions with heat index values between 105 and 110 degrees expected. * WHERE...In Connecticut, Southern Litchfield County. In New York, Eastern Dutchess, Eastern Ulster, and Western Dutchess Counties. * WHEN...For the Heat Advisory, from 11 AM to 8 PM EDT Sunday. For the Extreme Heat Warning, from 11 AM Monday to 8 PM EDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
Extreme Heat Warning issued June 21 at 11:22AM EDT until June 24 at 8:00PM EDT by NWS Upton NY
* WHAT...Dangerously hot conditions with heat index values up to 110 expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From noon Sunday to 8 PM EDT Tuesday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.
Extreme Heat Watch issued June 21 at 11:22AM EDT until June 24 at 8:00PM EDT by NWS Upton NY
* WHAT...For the Heat Advisory, heat index values up to 99 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 105 possible. * WHERE...In Connecticut, Southern Middlesex and Southern New London Counties. In New York, Northern Nassau, Northwest Suffolk, Southern Nassau, and Southwest Suffolk Counties. * WHEN...For the Heat Advisory, from noon to 8 PM EDT Sunday. For the Extreme Heat Watch, from Monday afternoon through Tuesday evening. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. Hot temperatures and
Heat Advisory issued June 21 at 11:22AM EDT until June 22 at 8:00PM EDT by NWS Upton NY
* WHAT...For the Heat Advisory, heat index values up to 99 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 105 possible. * WHERE...In Connecticut, Southern Middlesex and Southern New London Counties. In New York, Northern Nassau, Northwest Suffolk, Southern Nassau, and Southwest Suffolk Counties. * WHEN...For the Heat Advisory, from noon to 8 PM EDT Sunday. For the Extreme Heat Watch, from Monday afternoon through Tuesday evening. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. Hot temperatures and
SPC – No watches are valid as of Sat Jun 21 17:41:01 UTC 2025
No watches are valid as of Sat Jun 21 17:41:01 UTC 2025.
SPC – No MDs are in effect as of Sat Jun 21 17:41:01 UTC 2025
No Mesoscale Discussions are in effect as of Sat Jun 21 17:41:01 UTC 2025.
SPC Jun 21, 2025 1730 UTC Day 2 Convective Outlook
SPC 1730Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1230 PM CDT Sat Jun 21 2025 Valid 221200Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE UPPER MISSISSIPPI VALLEY TO THE SOUTHERN HIGH PLAINS... ...SUMMARY... Severe thunderstorms remain possible on Sunday from parts of the central and northern Plains into the upper Midwest. Significant hail and wind are possible across parts of eastern North Dakota and northern Minnesota, along with some tornado potential. A few severe storms are also possible across the Northeast. ...Synopsis... Broad mid-level troughing will prevail across