June 12th, 2002 Severe Weather

 

Very Large Hail Fell Wednesday Evening June 12th


 

1. Event overview

On the early afternoon of June 12, 2002, severe storms produced hail in Kearney County, and small, brief tornadoes in Rooks and Phillips Counties in North Central Kansas. The storms initiated in response to a southward moving cold front that slid through the region during the day. A second round of thunderstorms developed later in the afternoon producing 3.5 inch diameter hail near York, and 4.5 inch diameter hail in Riverdale, and Minden. Considerable hail damage occurred in portions of Kearney where hail was reported greater than 4.5 inches in diameter, resulting in vehicle, roof, and tree damage. The Plains Produce greenhouse east of Minden sustained major glass damage.

 

 

The following analyzed surface map depicts general meteorological conditions across the region, at 7 PM local time (Fig. 1).

Fig. 1. Surface map for 7 PM 12 June 2002 with subjectively analyzed mean sea level pressure (solid) contoured every 2 mb. Standard station model used; temperature and dewpoint (°F), pressure (mb), 3-h pressure tendency (mb), and sky conditions reported. Winds in knots with one full barb, and one half barb equal to 10, and 5 knots, respectively. Fronts and pertinent surface features depicted.

The large hail that fell in Kearney and Minden was associated with a supercell thunderstorm (Storm A) that developed in Custer County, along and on the cold side (north) of the surface cold front (Fig. 2). The storm moved southeast at ~35 mph impacting portions of Custer, Buffalo, Kearney, Webster and Franklin Counties, with heavy rain, strong winds, and at times, hail up to and exceeding 4.5 inches.

Fig. 2. Radar reflectivity of Storm A just as the storm arrived into Kearney, valid for 8:36 PM local, 12 June 2002.



A smaller supercell (Storm B) developed concurrently with Storm A in Kearney County, and tracked to the southeast at ~35 mph, impacting portions of Kearney, Adams, Webster, Nuckolls, and Jewell Counties. Hail up to 1.75 inches was reported with the storm (Fig. 3).

Fig. 3. Radar reflectivity valid for 9:01 PM local, 12 June 2002. Relevant features depicted.



A plot of the hail swaths associated with both storms reveals the extent of hail coverage and path lengths. Please note, the plot was based on the preliminary local storm report (see below) and damage surveys conducted by the Hastings National Weather Service Office (Fig. 4).

Fig 4. Hail swaths associated with storms A and B for 12 June 2002.

On June 13 2002, the Hastings National Weather Service Office conducted a damage survey documenting the extent of the hail and wind damage in the city of Kearney and surrounding areas (Fig. 5). Please note the figure was based on the survey and from damage reports received from the Buffalo County Office of Emergency Management. In Kearney, the majority of the greatest widespread hail damaged occurred in the northwest portion of town with scattered damage across eastern sections of the City.

 

Fig. 5. Preliminary damage survey of the City of Kearney. The map should be viewed as greatly generalized and preliminary.

The following reports are preliminary.   Official storm reports are located in Storm Data.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
 
TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....
0610 AM    CAWKER CITY               KS   .75 INCH HA
IL
06/12/02   MITCHELL
1225 PM    8 NNE AXTELL              NE   1 INCH HAIL
06/12/02   KEARNEY                        REPORTED BY STORM
                                          SPOTTER.
1245 PM    4 W NEWARK                NE   1 IN
CH HAIL
06/12/02   KEARNEY                        REPORTED BY STORM
                                          SPOTTER.
0121 PM    9 NW STOCKTON             KS   TORN
ADO
06/12/02   ROOKS                          REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.
0125 PM    3 SW GLADE
    KS   TORNADO
06/12/02   PHILLIPS                       REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.
0310 PM    8 NE NELSON
    NE   .75 INCH HAIL
06/12/02   NUCKOLLS                       REPORTED BY PUBLIC.
0339 PM    10 S PLAINVILLE
  KS   TORNADO
06/12/02   ROOKS                          REPORTED BY PUBLIC.
0513 PM    CLARKS
  NE   1.75 INCH HAIL
06/12/02   MERRICK                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.
0537 PM    5 SW STROMSBURG
    NE   1.75 INCH HAIL
06/12/02   POLK                           REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.
0542 PM    3 W STROMSBURG
    NE   1.75 INCH HAIL
06/12/02   POLK                           REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.
0550 PM    3 W GRESHAM
    NE   1 INCH HAIL
06/12/02   YORK                           REPORTED BY COOPERATIVE
                                          OBSERVER.
0600 PM    7 NW YORK                 NE   3.5
 INCH HAIL
06/12/02   YORK                           REPORTED BY COOPERATIVE
                                          OBSERVER.
0805 PM    7 NNE MILLER              NE   1 INCH HAIL
06/12/02   BUFFALO                        EVENT DURATION 5
                                          MINUTES. REPORTED BY
                                          STORM SPOTTER.
0840 PM    KEARNEY                   NE
  4.5 INCH HAIL
06/12/02   BUFFALO                        REPORTED BY EMERGENCY
                                          MANAGEMENT.
0845 PM    9 NNW MINDEN              NE   2
.75 INCH HAIL
06/12/02   KEARNEY
0845 PM    KEARNEY                   NE   1.5 INCH HAIL
06/12/02   BUFFALO                        REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.
0855 PM    6 N MINDEN
    NE   1.25 INCH HAIL
06/12/02   KEARNEY                        REPORTED BY STORM
                                          SPOTTER.
0905 PM    MINDEN                    NE   4.5
INCH HAIL
06/12/02   KEARNEY                        REPORTED BY EMERGENCY
                                          MANAGEMENT.
0908 PM    MINDEN                    NE   2
.5 INCH HAIL
06/12/02   KEARNEY                        REPORTED BY HAM RADIO
                                          OPERATOR.
0910 PM    3 NW HOLSTEIN             NE   .88

 





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