April 15, 2017 – Coldwater, Kansas Supercell

0 1.50" 40 791
TORNADOES HAIL WIND MILES

April 15th featured mostly westerly flow at 500mb across the Central Plains while a cold front was expected to migrate southward through Kansas. The intersection of this and a dryline was the focal point for severe weather for this day. The initial 13z SPC outlook placed a 2% tornado risk along the dryline from Dodge City to Childress, but was later upgraded to an extremely small 5% area centered near Woodward at the triple point. This seemed to be the obvious play for the day, but capping was a concern throughout.

1630z SPC Tornado Probabilities

I waited most of the morning to make a decision to go. It seemed rather marginal to me and I wasn’t sure if I wanted to waste a Saturday. Eventually I decided to make a run for it, so I took off from Grand Island shortly before 17z and began the southward drive. Halfway through Kansas, the SPC issued a mesoscale discussion focused around the Woodward area. A deepening patch of cumulus along the dryline from the TX Panhandle into Northwest Oklahoma and Kansas indicated that capping was still present but could initiate within the next couple of hours.

A severe thunderstorm watch was issued about thirty minutes later. I continued on my travel with my intended target of Buffalo. As I approached my destination, visible satellite was showing additional development in the cumulus field as a cell had initiated in the extreme northeastern Texas Panhandle.

Visible satellite at 22z with location marked

That storm would eventually fizzle out, but three new cells spawned in the line of robust cumulus just to my southwest. I sat and watched them from a hilltop on a dirt road I had visited with some friends the previous year before the Dodge City outbreak.

Visible satellite at 23z with location marked

Dodge City (KDDC) radar at 2302z with my location marked just west of Buffalo

I sat atop the hill for a while watching both all three storms from my vantage point as they struggled to fully explode.

I eventually bailed back north to re-intercept as the storms gathered strength and became more organized shortly after 0z.

Dodge City (KDDC) Radar at 0009z with location marked just south of Coldwater

My storms were still struggling while a storm in the distance to the north near Rozel looked far more substantial.

My storms continued to struggle…

…while the Rozel storm 70 miles to my north looked far more organized

Eventually, the Coldwater storm became mostly stationary, and from now until dark it put on a pretty nice display of structure which I was able to observe from one spot for a little less than an hour.


Chase Recap

START END DURATION INTERCEPTS CHASER ENCOUNTERS
Grand Island, NE @ 15/1648Z Grand Island, NE @ 16/0742Z 14:53 None None
  • May 18, 2017 – High Risk Bust in Kansas
    May 18, 2017 – High Risk Bust in Kansas
  • May 16, 2017 – Susank, Kansas Tornado
    May 16, 2017 – Susank, Kansas Tornado
  • April 14, 2017 – Central Nebraska
    April 14, 2017 – Central Nebraska
  • March 26, 2017 – Konawa Oklahoma Tornado
    March 26, 2017 – Konawa Oklahoma Tornado