Top 10 NWS WFO Storm Based Warnings by Size
This application prints out a listing of the top 10 largest and smallest storm based warnings by Weather Forecast Office (WFO). You can click the Event ID to get more information on that warning. This page defaults to show the largest and smallest warnings from any WFO. Storm Based Warnings did not become operational until 1 Oct 2007, so warning polygons prior to that date were only experimental at best. The areas shown are computed using EPSG:9311 (US National Atlas Equal Area).
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Top 10 Largest for WFO: ALL
| Date Issued | Size (sq km) | WFO | Phenomena |
|---|---|---|---|
| 2009-07-09 | 39715 | BIS | Severe Thunderstorm Warning 119 |
| 2009-07-09 | 37900 | BIS | Severe Thunderstorm Warning 116 |
| 2013-09-06 | 35498 | PDT | Severe Thunderstorm Warning 38 |
| 2020-08-16 | 33924 | GLD | Severe Thunderstorm Warning 243 |
| 2012-07-03 | 33311 | DLH | Severe Thunderstorm Warning 85 |
| 2015-04-27 | 32444 | EWX | Severe Thunderstorm Warning 76 |
| 2009-07-09 | 29895 | BIS | Severe Thunderstorm Warning 121 |
| 2020-08-21 | 29754 | GGW | Severe Thunderstorm Warning 74 |
| 2008-08-19 | 29683 | OTX | Severe Thunderstorm Warning 30 |
| 2020-07-08 | 28929 | GGW | Severe Thunderstorm Warning 50 |
Top 10 Smallest for WFO: ALL
| Date Issued | Size (sq km) | WFO | Phenomena |
|---|---|---|---|
| 2008-06-01 | 0.01 | RNK | Severe Thunderstorm Warning 103 |
| 2010-07-08 | 0.03 | CLE | Severe Thunderstorm Warning 128 |
| 2010-06-05 | 0.06 | BOX | Severe Thunderstorm Warning 40 |
| 2013-07-19 | 0.08 | MQT | Severe Thunderstorm Warning 24 |
| 2014-04-16 | 0.08 | MHX | Severe Thunderstorm Warning 13 |
| 2008-03-05 | 0.18 | MHX | Severe Thunderstorm Warning 10 |
| 2010-07-01 | 0.24 | CRP | Tornado Warning 19 |
| 2008-08-08 | 0.40 | OKX | Severe Thunderstorm Warning 107 |
| 2008-05-09 | 1.79 | MHX | Tornado Warning 23 |
| 2013-07-25 | 1.83 | OAX | Severe Thunderstorm Warning 161 |