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Storm Prediction Center Forecast


RSS Mesoscale Discussions from Storm Prediction Center

SPC - No watches are valid as of Sun Jul 21 12:29:03 UTC 2019

No watches are valid as of Sun Jul 21 12:29:03 UTC 2019.


SPC - No MDs are in effect as of Sun Jul 21 12:29:03 UTC 2019

No Mesoscale Discussions are in effect as of Sun Jul 21 12:29:03 UTC 2019.


SPC Jul 21, 2019 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook
      
Day 4-8 Outlook Image
Day 4-8 Convective Outlook  
NWS Storm Prediction Center Norman OK
0349 AM CDT Sun Jul 21 2019

Valid 241200Z - 291200Z

...DISCUSSION...
Weakening of the eastern U.S. upper-level trough early in the period
will result in a more zonal component to the mid/upper-level flow
across the CONUS, with the strongest winds confined to the northern
tier of states.  Surface high pressure will build eastward in the
wake of a frontal boundary extending from FL west through south TX,
with a notably drier air mass over much of the central/eastern U.S.
contributing to low severe potential.  

By Day 6/Friday and beyond, a couple of shortwave troughs within the
stronger flow aloft will affect areas from the northern Rockies east
to the Great Lakes.  Although the severe threat will likely increase
during this time frame, predictability remains low due to
uncertainty regarding the timing of these features and spatial
distribution of instability/favorable shear.

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