230
ACUS11 KWNS 161834
SWOMCD
SPC MCD 161834
COZ000-NMZ000-UTZ000-AZZ000-162030-

Mesoscale Discussion 2072
NWS Storm Prediction Center Norman OK
0134 PM CDT Mon Sep 16 2024

Areas affected...the Four Corners Region

Concerning...Severe potential...Watch unlikely

Valid 161834Z - 162030Z

Probability of Watch Issuance...20 percent

SUMMARY...Some severe gusts and perhaps some severe hail are
possible this afternoon near the Four Corners Region. A watch is not
anticipated at this time, however trends will be monitored.

DISCUSSION...Thunderstorms have developed near the Mogollon Rim over
northeastern Arizona this afternoon. These storms are on the
southeastern periphery of an expansive upper-level closed low with a
seasonably strong mid-level jet (40-50 kts of 500 mb flow). This
results in 30-40 kts of effective bulk shear across the region.
Additionally, strong heating has warmed temperatures into the mid
70s to near 80 F, resulting in steep low-level lapse rates (8-9
C/km) and 1000+ J/kg of DCAPE per mesoanalysis. The deep-layer shear
induced by the upper-level trough is expected to result in multicell
clusters of storms with severe gusts being the primary threat.
However given the steep lapse rates, straight hodographs, and low
freezing levels, some marginally severe hail may occur as well.
Given the expected sparse coverage of both of these, a watch is not
anticipated. With time, expect clusters to move to the northeast.
Some residual cloud cover over the San Juan Mountains is resulting
in lingering stable air, so this may limit the longevity of these
storms.

..Supinie/Gleason.. 09/16/2024

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...ABQ...GJT...FGZ...SLC...

LAT...LON   35171077 35791115 37151074 39171018 39540976 39810923
            39770877 39590840 39060778 37830774 36580801 35890806
            35260856 35030893 34720972 34831031 35171077