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Heat Advisory
ActiveDistrict of Columbia; Frederick; Carroll; Northern Baltimore; Cecil
Starts
Ends
Issued
Severity
Moderate
Urgency
Expected
Certainty
Likely
Details
* WHAT...For the Heat Advisory, heat index values up to 107 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 112 possible.
* WHERE...DC and portions of central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia.
* WHEN...For the Heat Advisory, from 11 AM this morning to 8 PM EDT this evening. For the Extreme Heat Watch, from Thursday morning through Friday evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
* ADDITIONAL DETAILS...Dangerous heat may linger into Saturday. Prolonged extreme heat could impact power, water, and transportation systems.
Data from the National Weather Service
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