Area Forecast Discussion
Issued by NWS Huntsville, AL
Issued by NWS Huntsville, AL
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
089 FXUS64 KHUN 072300 AFDHUN Area Forecast Discussion National Weather Service Huntsville AL 600 PM CDT Fri Jun 7 2024 ...New AVIATION... .NEAR TERM... (Tonight) Issued at 209 PM CDT Fri Jun 7 2024 Tranquil weather across the Tennessee Valley as a dry air mass remains in place with high pressure at the surface promoting a clear sky. It`s a good night for radiational cooling as temperatures will drop off quickly with the setting sun. Overnight lows will be quite comfortable with early June, dropping into the upper 50s to lower 60s in most locations. && .SHORT TERM... (Saturday through Monday) Issued at 209 PM CDT Fri Jun 7 2024 The surface high will shift east of the Tennessee Valley on Saturday, veering our surface flow to the southwest flow. This will gradually serve to modify the drier air mass, especially by the evening hours (as seen by dewpoints creeping back into the lower 60s). Hi-Res guidance is catching onto to a shortwave triggering an MCS over Missouri and pivoting into Ohio Valley late Friday night into Saturday. This feature may bring some additional cloud cover, but the sensible weather on Saturday will be warm/dry -- with highs peaking into the mid to upper 80s. Saturday night into Sunday morning, a slightly more amplified shortwave will move from the Ozarks into the Mid South and portions of the lower Ohio Valley once again. Ensemble guidance is hinting that this activity may put out an outflow somewhere across Tennessee during the late morning/midday hours. This feature may serve as an additional focus for convection Sunday afternoon/evening into portions of Sunday night. Good instability in an uncapped environment and more than sufficient bulk shear value may support at least a few strong storms sometime during this window. This activity should wane late Sunday night as the environment becomes worked over and the remnant boundary pushes south. && .LONG TERM... (Monday through Thursday) Issued at 420 AM CDT Fri Jun 7 2024 Forecast uncertainty increases considerably toward the beginning of next week, as the 0Z suite of global models offers a wide array of solutions regarding both the upper flow pattern across the eastern CONUS and eventual position of a cold front that is expected to drift southward through the region early Monday morning. Due primarily to uncertainties regarding frontal location, we have left a low (20-30%) chance POP in the forecast from Monday-Tuesday, especially as the projected orientation and proximity of the boundary (and resultant thermal gradient) may support impacts from additional clusters of thunderstorms that could originate across OK/AR and spread east-southeastward into the central Gulf Coast. By the end of the forecast period, a blocking mid-level ridge is likely to become established across the TN Valley to the north of a 500-mb trough that will drift southeastward into the northern Gulf of Mexico before stalling. This should result in warmer temperatures on Wednesday/Thursday, along with a transition to mainly isolated thunderstorm activity during the afternoon hours. && .AVIATION... (00Z TAFS) Issued at 600 PM CDT Fri Jun 7 2024 With high pressure in place across much of the region, VFR conds are expected thru the TAF period. Mid/high clouds will begin to spread into the area from the NW heading into the afternoon hrs Sat. Light/var winds will also become SSW near 7kt Sat morning. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...None. TN...None. && $$ NEAR TERM...AMP SHORT TERM....AMP LONG TERM....70 AVIATION...09