Map Run Times

MRCC VIP: Hours at or Below 32°F

Greatest Number of Consecutive Hours at or Below 32°F

Station Data Last Ran At:

About This Tool

This product identifies the longest continuous period of freezing temperatures over the (1) last 24 hours, (2) last 7 days, and (3) last 30 days for the Continental United States.

All data is sourced from Automated Surface Observing System (ASOS) stations via the Applied Climate Information System (ACIS) Hourly data feed. This data contains non-quality-controlled, top-of-the-hour surface observations. The hours below freezing tool applies a threshold of 10% for missing data in each time period (24 hours, 7 days, and 30 days). If more than 10% of the available hours in a period are missing, the tool will display a pop-up stating "missing data."

Calculations are performed daily around 11am ET (10am CT), with maps generated and posted around 11:30 a.m. ET.

More in depth explanations of data sources and anomalies may be found here.

Welcome to the VIP Hours Below Freezing Tool. Individual Station data will appear if the map is zoomed in to the regional level.

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