Excessive Heat Watch 2
Excessive Heat Watch 2 : National Weather Service Definitions. Excessive Heat Watch Issued when conditions are favorable for an excessive heat event to meet or exceed Excessive Heat Warning criteria in the next 12 to 48 hours. The criteria are a daytime maximum Heat Index (HI) at or around 110 with a minimum HI of 75 or higher. If the criteria is not strictly met, but collaboration with surrounding offices yields a watch, it is recommended that the forecaster on duty use their discretion in issuing a collaborated product to keep the public safety the top priority
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