Iowa Environmental Mesonet Daily Bulletin for 12 July 2025 > News No news is good news > IEM Code Pushes on Github No code commits found in previous 24 Hours > Daily Feature +---------------------------------------------- https://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2025-07-11 | Title : 1993 July Benchmark | Date : 11 Jul 05:30 AM | Votes : Good: 12 Bad: 0 Abstain: 0 +--------------------------------------------------------------- The heavy rainfall events continue to stack up this July as a persistent muggy air mass and passing disturbances fire complexes of storms about each day. The featured chart presents the monthly precipitation total records for Ames. The largest total shown is just over 16 inches during the epic July of 1993. So far, the total for Ames is nowhere near that total, but the daily accumulation for July 1993 didn't get started in earnest until a 4.65 inch event on the 9th. The featured media can be generated here: https://mesonet.agron.iastate.edu/plotting/auto/?_wait=no&q=57&network=IACLIMATE&station=IATAME&varname=total_precip&agg=max> NWS Watch/Warning Summary for 12 AM 11 Jul 2025 - 12 AM 12 Jul 2025 CDT Summary +_________ By WFO ____________+ Watches Type US IA | ARX DVN DMX OAX FSD | US Tornado 16 9 | 1 5 4 0 0 | 2 Svr Tstorm 233 31 | 3 26 6 0 0 | 5 Flash Flood 36 14 | 3 10 3 0 0 | N/A ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD > IEM Cow Report SVR+TOR Warnings Issued: 245 Verified: 78 [31.8%] Polygon Size Versus County Size [18.6%] Average Perimeter Ratio [24.9%] Percentage of Warned Area Verified (15km) [16.4%] Average Storm Based Warning Size [1303 sq km] Probability of Detection(higher is better) [0.77] False Alarm Ratio (lower is better) [0.68] Critical Success Index (higher is better) [0.29]