A storm will track across portions of the Midwest and into the western Great Lakes through Friday as a combination of a wintry mixture and rain will result in hazardous traveling conditions. A strong Pacific system will be approaching with high winds, and heavier rain and snow late Friday into the weekend with impacts spreading across much of the West. Across Hawaii, strong winds and high surf. Read More >
NOTICE:This is an experimental page meant to provide information on the potential for heat impacts in the Grand Canyon. Please contact Tony Merriman at tony.merriman@noaa.gov to provide any feedback
| *Probabilities are derived from a suite of forecast model guidance | Probability Legend |
| 0-19% | |
| **Forecast temperatures are the official values published by NWS Flagstaff | 20-39% |
| 40-59% | |
| ***Number of hours with a forecast temperature above 110 F over a daily twenty four hour period | 60-79% |
| 80-100% |
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