July 24 Severe Weather Summary (Corridor of Wind Damage)

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July 24, 2011

Severe Weather Event

Corridor of Wind Damage Mainly Southeast of Hastings

To the right is a National Weather Service Radar loop with overlayed storm reports, from 4:00 pm CDT July 24th to 8:00 pm CDT, July 24th.

The NWS Hastings coverage area is located within the orange outlined area labeled "GID", with the Interstates in red.

(Click Radar Loop To Enlarge)

 
 Severe Weather Summary:

Although expectations were not high for widespread severe weather on Sunday, July 24, 2011, the combination of an unstable and very moist airmass resulted in a fairly widespread damaging wind event that really started getting going just southeast of Hastings around 5:15 PM, and lasted through around 7 PM as it spread southeast primarily through the Clay, Fillmore, Thayer, and Jewell County areas. This complex of severe storms began as an area of weaker storms near the Interstate 80 corridor at mid-afternoon. As these initial storms spread southeast, they generated an extensive "cold pool" from outflow winds, allowing a considerable acceleration in storm motion and wind speeds. Along the way, there were numerous reports of downed power lines and tree damage, from winds generally in the 60-70 MPH range. Once this initial round of severe storms moved off into northeast Kansas, a new, smaller area of strong to severe storms briefly flared up in southern Osborne County Kansas around 715 PM, resulting in estimated 60 MPH winds near Natoma.

In addition, locally heavy rainfall pounded some areas (see Heavy Rainfall section below).

Here are a few "highlights" of the event, based on reports from storm spotters, local law enforcement, emergency management, and the public:

  • Power lines and trees/tree limbs down in numerous locations, including Deweese, Fairfield, Strang, Hebron, Bruning...tree snapped and landed on a house in Bruning
  • Estimated 65 MPH gusts with trees snapped in half in Mankato, KS
  • Measured 3.50 inches of rainfall in less than 2 hours at Southern Hills Golf Course just southwest of Hastings 


For an interactive listing of the PRELIMINARY storm reports, please click the linked image below: 

  
 July 24, 2011 Storm Reports.
Click image for detailed reports.

  

Locally Heavy Rainfall:

In addition to the widespread wind damage, the Nebraska storm complex dumped some hefty rainfall amounts in a short time, especially in its early, slow moving stages. Based on several reports, the heaviest rain targeted locations just south of Hastings, where the Southern Hills Golf Course measured 3.50" in less than 2 hours. Only a few miles north of Southern Hills, the Hastings Municipal Airport only measured 1.35", demonstrating the highly variable nature of summer precipitation.

Below are a few of the highest 24-hour rainfall totals from the area, ending around 7 AM Monday, July 25th. 

Location

Rainfall Total

Hastings (4 miles SW at 
Southern Hills Golf Course)

3.50

Ayr (3 miles NE)

2.54

Below is a map reflecting 24-hour rainfall totals ending around 7 AM, July 25th, focusing solely on the NWS Hastings 30-County Warning Area.  The rainfall reports are courtesy of NWS Cooperative Observers, Nebraska Rainfall Assessment and Information Network (NeRAIN) observers, and  CoCoRaHS observers. Please note: This rainfall map is a "best-approximation" of actual measured amounts. Some reports may not be included, and amounts reflected on the map may not match locations exactly due to the effects of interpolation and "smoothing" used to create the maps. These preliminary data may contain errors.

 Click Rainfall Map To Enlarge

This page was composed by the staff at the National Weather Service in Hastings, Nebraska.



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