IEM Daily Feature
Friday, 05 February 2016

Most Common NWS Alerts

Posted: 05 Feb 2016 04:46 AM

After the Blizzard Watch and Warning issued this week by NWS Des Moines, one may wonder how common it is to see this alert issued. The featured chart presents the top 25 most issued alerts by NWS Des Moines as measured by the unique number of forecast zones or counties alerted. For example, a Severe Thunderstorm Warning for portions of Polk and Story counties would count as 2 in this analysis. The percentages shown are relative to the most frequent product, the Severe Thunderstorm Warning. So the Blizzard Warning comes in at #18 and Blizzard Watch at #25, which makes the Severe Thunderstorm Warning approximately 12 and 25 times more common respectively. Please note that the time duration difference in alerts is not considered for this analysis.

Good = 47
Bad = 34
Abstain = 35

Tags:   nws   warnings