A low pressure system will bring heavy to excessive rainfall and high winds across Montana this afternoon. Heavy rainfall totals may lead to scattered flash flooding concerns. A line of showers and strong to severe thunderstorms will move into the mid Missouri Valley region this afternoon producing severe winds and isolated large hail with stronger storms. Read More >
Overview
A strong area of low pressure aloft moved up into the northern Plains as an associated mid level jet advanced over the southern Plains. The right entrance region of this jet was situated over the eastern Panhandles on top of a dryline which helped bolster deep convection. A weak lee low developed over southeastern CO helping to increase convergence along the dryline during the afternoon where Thunderstorms initiated and quickly became severe. Deep layer shear vectors were normal to the boundary at around 40-50 knots resulting in discrete supercell structures. SBCAPE on the order of 3500 J/kg supported very large to giant hail. Canadian was one of the main targets in this event as the north side of town got beat up with golf ball to baseball size hail due to a "right mover". A "left mover" moved up into Beaver County at 60 mph and also dropped very large hail east of Elmwood, OK.
Fig 1: This is a base radar reflectivity loop of the June 13th event.
Fig 2: GOES 16 Cloud Top Phase IR Band for June 13th event (non-operational, preliminary data).
Photos & Video:
Here are some photos of the large hail and storm structure:
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| Rachael sent this photo of half dollar size hail 3 miles west of Slapout | Tennis to baseball size hail 5 miles northeast of Canadian by Ashley Boyd | Ping-pong ball size hail would eventually get much bigger in Canadian by Robert Boyd | Hen Egg size hail just west of Canadian airport by Ashley Boyd |
Radar:
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| Splitting supercell resulted in left mover (Beaver Co) and right mover (Hemphill Co) | Right mover had 50dBZ core over 40k feet at times with 60 dBZ over 35k feet AGL producing baseball size hail | Left mover had strong anticyclonic rotation and produced hail at least as large as hen eggs with an unconfirmed report as large as baseballs | Other severe storms continued to form east of the dryline beneath the right entrance region of an upper level jet streak. |
Storm Reports
PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE AMARILLO TX 1112 PM CDT TUE JUN 13 2017 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0430 PM HAIL 5 W PAMPA 35.55N 101.05W 06/13/2017 M0.88 INCH GRAY TX STORM CHASER PEA TO MARBLE SIZE HAIL WITH NICKEL MIXED IN AT 152 AND PRICE IN PAMPA 0431 PM HAIL 5 W PAMPA 35.55N 101.05W 06/13/2017 M1.00 INCH GRAY TX BROADCAST MEDIA QUARTER SIZE HAIL REPORTED ON STATE HIGHWAY 152 WEST OF PAMPA. 0510 PM HAIL GROOM 35.20N 101.11W 06/13/2017 M1.00 INCH CARSON TX NWS EMPLOYEE 0525 PM HAIL 9 NNW MIAMI 35.81N 100.70W 06/13/2017 M1.75 INCH ROBERTS TX LAW ENFORCEMENT 0530 PM HAIL 10 E PERRYTON 36.39N 100.62W 06/13/2017 E1.50 INCH OCHILTREE TX PUBLIC PING PONG BALL SIZED HAIL REPORTED 10 MILES EAST OF PERRYTON. 0545 PM HAIL BOOKER 36.46N 100.54W 06/13/2017 E1.75 INCH LIPSCOMB TX FIRE DEPT/RESCUE 0550 PM HAIL 4 NNE BOOKER 36.51N 100.51W 06/13/2017 E1.75 INCH BEAVER OK TRAINED SPOTTER 0554 PM HAIL 6 SSE ELMWOOD 36.54N 100.48W 06/13/2017 M2.00 INCH BEAVER OK PUBLIC 0555 PM HAIL CANADIAN 35.91N 100.38W 06/13/2017 E2.50 INCH HEMPHILL TX FIRE DEPT/RESCUE TENNIS BALL SIZED HAIL REPORTED AT 555 PM . 0555 PM HAIL CANADIAN 35.91N 100.38W 06/13/2017 M2.00 INCH HEMPHILL TX TRAINED SPOTTER 0558 PM HAIL 3 E CANADIAN 35.91N 100.33W 06/13/2017 E1.00 INCH HEMPHILL TX PUBLIC QUARTER SIZED HAIL REPORTED JUST EAST OF CANADIAN. 0558 PM HAIL 5 NNW CANADIAN 35.98N 100.42W 06/13/2017 E2.75 INCH HEMPHILL TX PUBLIC 0606 PM HAIL 11 ENE ELMWOOD 36.68N 100.34W 06/13/2017 E1.75 INCH BEAVER OK LAW ENFORCEMENT 0619 PM HAIL 6 SE HEDLEY 34.81N 100.58W 06/13/2017 E1.50 INCH DONLEY TX STORM CHASER 0624 PM HAIL 2 NE GLAZIER 36.03N 100.24W 06/13/2017 E1.75 INCH HEMPHILL TX STORM CHASER 0625 PM HAIL 6 SE HEDLEY 34.81N 100.58W 06/13/2017 M2.00 INCH DONLEY TX STORM CHASER 0641 PM HAIL 5 S HIGGINS 36.05N 100.03W 06/13/2017 E2.75 INCH HEMPHILL TX STORM CHASER 0646 PM HAIL HIGGINS 36.12N 100.03W 06/13/2017 E1.75 INCH LIPSCOMB TX BROADCAST MEDIA 0700 PM HAIL 1 SSE WELLINGTON 34.84N 100.21W 06/13/2017 E1.00 INCH COLLINGSWORTH TX TRAINED SPOTTER 0720 PM HAIL 3 W SLAPOUT 36.62N 100.17W 06/13/2017 M1.25 INCH BEAVER OK TRAINED SPOTTER 0722 PM HAIL 2 S SLAPOUT 36.59N 100.12W 06/13/2017 E1.50 INCH BEAVER OK TRAINED SPOTTER 0843 PM HAIL MOBEETIE 35.53N 100.44W 06/13/2017 E1.75 INCH WHEELER TX TRAINED SPOTTER
Environment (coming soon)
Insert synoptic summary.
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Near-storm environment summary.
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