Alert archive / Heat Advisories / 2017
Heat Advisories in the United States, September 2017
13 heat advisories in September 2017. Each alert counts once, however many counties it covered. The archive of heat advisories reaches back to 2005.
Heat Advisories by state
Each state shaded by its count. Tap a state for its own archive.
- Heat Advisories
- 13
- Busiest day
- September 3, 20174 heat advisories
Over time
By day
Days in UTC, the clock the archive keeps.
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Texas74
- California48
- Kansas35
- Arkansas33
- Missouri32
- North Carolina30
- Nebraska23
- Oklahoma22
- Iowa21
- Oregon16
- Illinois16
- Louisiana15
- Washington15
- Virginia15
- New Mexico15
- Mississippi13
- South Dakota12
- Maryland12
- South Carolina11
- Tennessee10
- Alabama10
- New Jersey9
- Minnesota7
- Montana7
- Kentucky7
- District of Columbia7
- Arizona5
- Indiana5
- Pennsylvania5
- Delaware5
- Utah4
- New York4
- Florida4
- Ohio4
- Idaho4
- Georgia4
- Connecticut4
- Nevada3
- West Virginia3
- Wisconsin2
Nearby
Alerts in force nowThe tornado archiveThe radar archive20162018
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.