First off, a 500 mb low is forecast to be near Denver by evening, and flow around it is forecast to be at 40 to 50 knots.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOE6RVkdwlT7t3nCLNxORWcfUGwbGpE8WFgzDk29zae4Dk6oXkZD5tJmBFldETOdFgYMspoFY1XcMBzVO_uisYNRObi2DpeWbrgrd0q5FYhE-bnlj92mE3BFqByWZyukEMijau4vrAHiEM/s320/NAM_221_2010051712_F60_WSPD_500_MB.png)
So shear shouldn't be a problem.
Moisture:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsC9sU7t5TXhyphenhyphenhqRo_Ibb9gBhF37a_3V7CUu2PeLcvY-43vIfBXTboQw_CqBKwtcFqOvkHM0BlCZ7vwSUVbzwYrjCBd_B8RaOaVJQC657yibpnp9vxfc1AZ-B9l4T3vaWDmcMRLWgZrq3X/s320/NAM_221_2010051712_F60_DPTF_2_M_ABOVE_GROUND.png)
That's pretty good.
How about instability?
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEtD-CdG__iICSzPj-1u0Y3vi08fhOw8htgooubvJOMzarpRXFKpeD-hv_yrmfMv-w2NbAIqiB4SU9DkJRoHVr9z99KL-9AdydVlGZW_qJ9OcJbvIpHtJgJ3Dsy9pKER5urjhkefcmNbre/s320/NAM_221_2010051712_F60_CAPE_SURFACE.png)
That looks pretty good. So if I pull up a prog sounding for the area where they look to juxtapose, in northwestern Oklahoma, here's what I get:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfGLe8V_GK_oCp4cs6HwSMye6xIyiL9yOyqFELfuIrUVZ73ktV4G2rjhQ92e2QiGtSKJwVpeuy07uwDjBOw_34z1IKIooq26XwqIfUnowtcDKga4-j7UAfjUn886DQMKAUXUqSDhASN9to/s320/SKT_NAM__KWWR.png)
Closer to the warm front, south of Dodge City, KS, the low-level shear looks better but the instability not so good:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEja085g9y5HaN3EWaIQ9r8-XhJsYzkd5WtjF-iTAsZXge1lLXVoT9CXns-IevsYvql4m2HGaj8ATSFYt2afD6S1laPX7LeYMgCS0HFhvwlXhCAnJnpTfbeSHvuVV0hXACpdGYK49BqLeknJ/s320/NAM_218_2010051712_F60_37.5000N_100.5000W.png)
Perhaps there'll be a place in between that will have a more favourable combination of CAPE and shear, but if not it should still be a good day with HP supercells of the hail-making variety.
I'll talk about the 20th tomorrow.
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