Strong Coastal Storm to Impact Mid-Atlantic to New England through Thursday

A rapidly intensifying storm developing across the Mid-Atlantic will move quickly into New England by Thursday. The storm will produce heavy rainfall and localized flooding across these areas. Additionally, strong winds may cause some tree damage and power outages through Thursday. Elsewhere, elevated to critical fire weather conditions are forecast across the Great Basin and Central Rockies. Read More >

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Wind Chill Chart

Cold Wind Chills:
Wind Chill Warning: (See a map of Wind Chill Warning thresholds)
Wind Chill Advisory: (See a map of Wind Chill Advisory thresholds)

heat index chart

Heat Advisory: (See a map of Heat Advisory Criteria)
Excessive Heat Warning: (See a map of Excessive Heat Warning Criteria)
Excessive Heat Watch: Possibility that Excessive Heat Warning Criteria may be met at longer ranges (12 to 48 hrs out).

For an outlook beyond 3-4 days, see the extended heat index guidance we get from the NWS's Hydrometeorological Prediction Center (HPC):
Maximum HEAT INDEX OUTLOOKS (for days 3-7) from the NWS Hydrometeorological Prediction Center (HPC) in DC.