SPC AC 140621
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1221 AM CST Mon Feb 14 2022
Valid 151200Z - 161200Z
...NO THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Thunderstorms are not expected on Tuesday.
...Synopsis...
A strong shortwave trough is forecast to extend from the northern
Rockies into the western Great Basin early Tuesday morning. This
shortwave is then expected to drop southward throughout the day,
ending the period extended from the Four Corners through the
northern Baja Peninsula. Evolution of this shortwave will contribute
to significant amplification of the upper pattern as well as
increased southwesterly mid-level flow across the central/southern
Plains and Mid MS Valley. Cold mid-level temperatures (i.e. -30 deg
C at 500 mb) will also accompany this shortwave, supporting the
potential for a few lightning flashes within any cells that develop
near this colder air aloft as it moves across the Great Basin.
Coverage is currently expected to remain less than 10 percent.
Farther east, the approach of this shortwave, paired with another
shortwave trough progressing within the northern stream across the
Canadian Prairie Provinces, will help foster a strong, dynamically
driven low-level jet across the Plains. By Tuesday evening, 50+ kt
850 mb winds will likely extend from northeast TX through the Upper
MS Valley. Strong southerly surface winds will be presence
throughout the day as well, contributing to moisture advection
across the southern Plains. Previous frontal intrusion will limit
the northward extent of the better moisture, but mid 50s dewpoints
are expected into north TX and low 60s dewpoints are possible along
the TX Coast by Wednesday morning. Even so, the stronger forcing
for ascent will remain west of the southern Plains and capping
promoted by warm mid-level temperatures will preclude thunderstorm
development.
..Mosier.. 02/14/2022
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