Iowa Environmental Mesonet Daily Bulletin for 22 February 2018

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Daily Feature

'17-'18 Winter Storm #17
Date: 21 Feb 05:32 AM
Votes: Good: 4   Bad: 0 Abstain: 0

Our most recent bout with winter brought a mixed bag of precipitation to the state over the past two days. The featured map presents NWS Local Storm Reports showing snow over northwestern Iowa, heavy rainfall over southeastern Iowa, and freezing rain in-between. Freezing rain amounts where generally a tenth of an inch or so. The next wintery mix arrives in a day or so.

NWS Watch/Warning Summary for 12 AM 21 Feb 2018 - 12 AM 22 Feb 2018 CST

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 9 0 0 0 0 0 0 1
Svr Tstorm 12 0 0 0 0 0 0 0
Flash Flood 40 0 0 0 0 0 0---

ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD

IEM Cow Report

SVR+TOR Warnings Issued: 21 Verified: 2  [9.5 %]
Reduction of Size Versus County Based     [75.8 %]
Average Perimeter Ratio                   [27.7 %]
Percentage of Warned Area Verified (15km) [3.8 %]
Average Storm Based Warning Size          [1106 sq km]
Probability of Detection(higher is better)[0.67]
False Alarm Ratio (lower is better)       [0.90]
Critical Success Index (higher is better) [0.09]