May 17, 2013 - The Black Hills region's first significant severe weather event of the season occurred Friday, May 17. Severe thunderstorms produced large hail over northeastern Wyoming and the northern Black Hills with the largest hail of 2.5" in diameter reported near Devils Tower, Wyoming. Some strong wind gusts occurred over south central South Dakota.  Reports received are listed both chronologically and by magnitude.

Severe Thunderstorm Reports from May 17, 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     HAIL             2 NNW SAINT ONGE        44.58N 103.75W
05/17/2013  E0.88 INCH       LAWRENCE           SD   TRAINED SPOTTER
0303 PM     HAIL             2 ESE DOWNTOWN SPEARFIS 44.49N 103.82W
05/17/2013  E0.88 INCH       LAWRENCE           SD   PUBLIC         

            I-90 EXIT 14
0305 PM     HAIL             S DOWNTOWN SPEARFISH    44.50N 103.86W
05/17/2013  M0.70 INCH       LAWRENCE           SD   NWS EMPLOYEE   

            LASTED 12 MINUTES
0310 PM     HAIL             1 E DOWNTOWN SPEARFISH  44.50N 103.84W
05/17/2013  M1.00 INCH       LAWRENCE           SD   NWS EMPLOYEE
0320 PM     HAIL             2 NNW SAINT ONGE        44.58N 103.74W
05/17/2013  M1.00 INCH       LAWRENCE           SD   TRAINED SPOTTER

            LASTED 10 MINUTES
0340 PM     HAIL             4 SW NISLAND            44.63N 103.61W
05/17/2013  E0.70 INCH       BUTTE              SD   PUBLIC
0345 PM     HAIL             7 W SAVAGETON           43.86N 105.93W
05/17/2013  E0.88 INCH       CAMPBELL           WY   PUBLIC
0356 PM     HAIL             16 NNW SAVAGETON        44.08N 105.91W
05/17/2013  E0.88 INCH       CAMPBELL           WY   PUBLIC
0423 PM     HAIL             7 N DOWNTOWN GILLETTE   44.39N 105.50W
05/17/2013  E1.00 INCH       CAMPBELL           WY   TRAINED SPOTTER
0426 PM     HAIL             3 ESE DOWNTOWN SPEARFIS 44.48N 103.80W
05/17/2013  E1.00 INCH       LAWRENCE           SD   TRAINED SPOTTER
0430 PM     HAIL             3 E DOWNTOWN SPEARFISH  44.50N 103.80W
05/17/2013  E1.00 INCH       LAWRENCE           SD   PUBLIC         

            MILE MARKER 18
0438 PM     HAIL             2 SSW SAINT ONGE        44.53N 103.73W
05/17/2013  E1.00 INCH       LAWRENCE           SD   TRAINED SPOTTER
0441 PM     HAIL             5 SSW SAINT ONGE        44.48N 103.76W
05/17/2013  E1.75 INCH       LAWRENCE           SD   TRAINED SPOTTER
0445 PM     HAIL             12 SW DOWNTOWN GILLETTE 44.17N 105.67W
05/17/2013  E1.25 INCH       CAMPBELL           WY   PUBLIC         

            ALONG HIGHWAY 50
0515 PM     TSTM WND GST     7 N VETAL               43.32N 101.37W
05/17/2013  E60.00 MPH       BENNETT            SD   PUBLIC
0515 PM     HAIL             7 N VETAL               43.32N 101.37W
05/17/2013  E1.00 INCH       BENNETT            SD   PUBLIC
0520 PM     HAIL             5 SE DOWNTOWN GILLETTE  44.24N 105.43W
05/17/2013  E1.00 INCH       CAMPBELL           WY   TRAINED SPOTTER
0524 PM     HAIL             8 ESE SAINT FRANCIS     43.10N 100.75W
05/17/2013  E0.88 INCH       TODD               SD   TRAINED SPOTTER
0530 PM     HAIL             7 NE BEAR BUTTE STATE P 44.55N 103.32W
05/17/2013  E1.00 INCH       MEADE              SD   PUBLIC
0540 PM     TSTM WND GST     3 WNW ROSEBUD           43.25N 100.91W
05/17/2013  E60.00 MPH       TODD               SD   PUBLIC
0600 PM     HAIL             5 S MISSION             43.23N 100.66W
05/17/2013  E1.00 INCH       TODD               SD   TRAINED SPOTTER
0615 PM     HAIL             DEVILS TOWER            44.59N 104.71W
05/17/2013  E1.75 INCH       CROOK              WY   TRAINED SPOTTER
0616 PM     HAIL             3 SE DEVILS TOWER       44.56N 104.67W
05/17/2013  E2.50 INCH       CROOK              WY   TRAINED SPOTTER
0757 PM     HAIL             9 S SUNDANCE            44.27N 104.37W
05/17/2013  E1.00 INCH       CROOK              WY   PUBLIC
0815 PM     HAIL             3 WNW PLAINVIEW         44.62N 102.22W
05/17/2013  E0.88 INCH       MEADE              SD   PUBLIC
0845 PM     HAIL             7 WNW CLARETON          43.74N 104.81W
05/17/2013  E1.00 INCH       WESTON             WY   TRAINED SPOTTER
0958 PM     HAIL             DEADWOOD                44.38N 103.73W
05/17/2013  E1.75 INCH       LAWRENCE           SD   TRAINED SPOTTER
HAIL REPORTS LISTED BY SIZE (INCHES)

SIZE    LOCATION                 ST  COUNTY           TIME
------  -----------------------  --  --------------   -------
  2.50   3 SE DEVILS TOWER        WY  CROOK            0616 PM
  1.75   DEADWOOD                 SD  LAWRENCE         0958 PM
  1.75   DEVILS TOWER             WY  CROOK            0615 PM
  1.75   5 SSW SAINT ONGE         SD  LAWRENCE         0441 PM
  1.25   12 SW DOWNTOWN GILLETTE  WY  CAMPBELL         0445 PM

  1.00   7 WNW CLARETON           WY  WESTON           0845 PM
  1.00   9 S SUNDANCE             WY  CROOK            0757 PM
  1.00   5 S MISSION              SD  TODD             0600 PM
  1.00   7 NE BEAR BUTTE ST PARK  SD  MEADE            0530 PM
  1.00   5 SE DOWNTOWN GILLETTE   WY  CAMPBELL         0520 PM
  1.00   7 N VETAL                SD  BENNETT          0515 PM
  1.00   2 SSW SAINT ONGE         SD  LAWRENCE         0438 PM
  1.00   3 E DOWNTOWN SPEARFISH   SD  LAWRENCE         0430 PM

  1.00   3 ESE DOWNTOWN SPEARFISH  SD  LAWRENCE         0426 PM
  1.00   7 N DOWNTOWN GILLETTE    WY  CAMPBELL         0423 PM
  1.00   2 NNW SAINT ONGE         SD  LAWRENCE         0320 PM
  1.00   1 E DOWNTOWN SPEARFISH   SD  LAWRENCE         0310 PM
  0.88   3 WNW PLAINVIEW          SD  MEADE            0815 PM
  0.88   8 ESE SAINT FRANCIS      SD  TODD             0524 PM
  0.88   16 NNW SAVAGETON         WY  CAMPBELL         0356 PM
  0.88   7 W SAVAGETON            WY  CAMPBELL         0345 PM
  0.88   2 ESE DOWNTOWN SPEARFISH  SD  LAWRENCE         0303 PM

  0.88   2 NNW SAINT ONGE         SD  LAWRENCE         0230 PM
  0.70   4 SW NISLAND             SD  BUTTE            0340 PM
  0.70   DOWNTOWN SPEARFISH     SD  LAWRENCE         0305 PM
THUNDERSTORM WIND REPORTS LISTED BY SPEED (MPH)

SPEED   LOCATION                 ST  COUNTY           TIME
------  -----------------------  --  --------------   -------
60.00   3 WNW ROSEBUD            SD  TODD             0540 PM
60.00   7 N VETAL                SD  BENNETT          0515 PM

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