598
FXUS64 KOUN 010802
AFDOUN

Area Forecast Discussion
National Weather Service Norman OK
302 AM CDT Wed May 1 2024

...New SHORT TERM, LONG TERM...

.SHORT TERM...
(Today and tonight)
Issued at 253 AM CDT Wed May 1 2024

Showers and thunderstorms continue to develop across northern into
central Oklahoma early this morning as low-level jet maintains warm
advection atop a southward sinking outflow boundary. The current
expectation is that convection will tend to wane through the morning
as forcing weakens. The effect, if any, this outflow boundary may
have on convective development later today is not entirely clear,
but the current expectation is that outflow will wash out through
the day with the main focus for convection being the dryline just
to the west of our area by late afternoon.

The environment ahead of the dryline will be fairly similar to
yesterday, with moderate to strong instability but rather modest
bulk shear values around 30-35 kts. As we saw yesterday, this
should still be sufficient for supercell development with all
severe hazards possible. Storm coverage will likely be greater
today out west as a weak shortwave provides more background
ascent, with convection expected to develop upscale into clusters
or line segments during the evening and progress eastward across
the area. The severe threat appears to diminish with eastward
extent as instability wanes later into the evening and overnight
period.

Ware

&&

.LONG TERM...
(Thursday through Tuesday)
Issued at 253 AM CDT Wed May 1 2024

By Thursday a cold front is expected to progress south and eastward
across the area. With an unstable airmass in place ahead of the
boundary, strong to severe storms will be possible once again. The
front will clear the area Thursday night but will quickly return
northward during the day on Friday, bringing renewed chances for at
least scattered thunderstorm development. Models are also now
showing a second cold front moving into northern and western
Oklahoma very late Friday night, with a complex of storms possible
here.

Storm chances then continue Saturday and Sunday as a moist and
unstable airmass remains in place and at least modest southwesterly
flow is maintained aloft. There is some signal for a potentially
more significant trough ejection into the plains on Monday, but
models disagree on timing and location of any attendant severe
risk at this range.

Ware

&&

.AVIATION...
(00Z TAFS)
Issued at 648 PM CDT Tue Apr 30 2024

TSRA expected to have impacts mainly at KPNC and KSWO overnight
into tomorrow morning (closer to incoming from across southern
Kansas). Impacts at KCSM, KLAW, and KSPS is possible for the
first few hours of forecast before dissipating. Frontal boundary
expected to progress down toward central Oklahoma toward 12Z,
possibly reinforced by TSRA outflow, but retreat during the day
tomorrow. PROB30 will be included central Oklahoma tomorrow
afternoon near retreating front. TSRA will also be possible across
western Oklahoma by end of forecast, but impacts may occur just
beyond this forecast valid time.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  81  64  78  59 /  40  40  80  40
Hobart OK         83  61  82  57 /  40  60  40  30
Wichita Falls TX  82  64  83  62 /  30  60  50  40
Gage OK           88  58  78  49 /  40  30  30  20
Ponca City OK     80  64  76  55 /  80  40  90  40
Durant OK         84  65  79  64 /  20  70  80  60

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch until 10 AM CDT this morning for OKZ007-008-012-013.

TX...None.
&&

$$

SHORT TERM...08
LONG TERM....08
AVIATION...11