411 FXUS64 KAMA 170548 AFDAMAArea Forecast Discussion National Weather Service Amarillo TX 1248 AM CDT Wed Sep 17 2025
...New KEY MESSAGES, SHORT TERM, LONG TERM, AVIATION...
.KEY MESSAGES... Issued at 1244 AM CDT Wed Sep 17 2025
- High chances for rain and thunderstorms are forecasted for Wednesday and Thursday with the highest chances for rain on Wednesday evening into the night.
- Slightly cooler temperatures in the 70s to low 80s are expected Thursday due to cloud cover and a cold frontal passage.
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.SHORT TERM... (Today through Thursday night) Issued at 1244 AM CDT Wed Sep 17 2025
Showers and storms just to the north overnight tonight may manage to clip into the OK Panhandle. Overall, just moderate rain with small hail is the main concern. Will not completely rule out some isolated elevated storm further south as mid level moisture may saturate just enough to a storm to pop off on its own. That being said still just heavy rain is the main concern.
Wednesday, upper level trough over Wyoming will shift a bit to the southeast over western Nebraska later in the evening. As a result we`ll be dealing with a frontal system that`s expected to track south across the Panhandles and stall out somewhere what looks to be along that highway 60 corridor from Canadian to Hereford. That area of strong convergence coupled with daytime heating will aid in several thunderstorms popping off along that boundary. Shear values do look to be in the +30kt range, but the overall CAPE is only expected to be in the 500-1000J/kg range. So the severe threat is certainly on the lower side, but we are outlooked for a 5% chance from SPC, and that seems reasonable. Max hail size looks to be about half dollar, and we do have a bit of an inverted V sounding at the surface, so will not rule out some wind gusts that could reach 60 mph. Now this area of convergence could shift a bit to the north or south, but behind this main area we could still see development as we still may heat up enough to get storms despite being behind the main front. And those areas further north would be where the larger hail stones could be seen, if storms can get going. Now as the system takes a slow progression we`ll be dealing with that stalled out boundary where multiple rounds of storms could develop on Wednesday night into Thursday.
Thursday`s highs for the most part will be in the 70s given the cooler air in place, but further south of I-40 where the front may not progress, we could still see low to mid 80s for a high. Lingering showers and storms are expected along that convergence zone and a good portion of the precipitation is expected to move east into OK, but we`ll still have decent pops along and east of the Amarillo to Guymon line. Pops will start to gradually drop off Thursday night as the systems influence exits the area.
Weber
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.LONG TERM... (Friday through Tuesday) Issued at 1244 AM CDT Wed Sep 17 2025
Friday through the weekend, while we are looking at a building ridge of high pressure, we will still be dealing with west to northwest flow and embedded disturbances that move across the area. That will continue the possibility of showers and storms through the weekend. Right now the better chances seem to be in the eastern Panhandles, but will not rule out any area getting showers or storms. Chances are in the 15-25% range for now, but would not be surprised if those numbers come up, especially in the east.
Monday into Tuesday we`ll start to finally amplify that upper level ridge over the west and in conjunction the trough that appears to be just far enough east over OK. That would favor a reduction in showers and storms, and a better chance at dry conditions. Monday may still have cooler temperatures and lingering storms, while Tuesday it appears that the trough is far enough east that conditions should be dry, and we should start to warm up.
Weber
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.AVIATION... (06Z TAFS) Issued at 1244 AM CDT Wed Sep 17 2025
VFR conditions will prevail at all TAF sites over the next 12 hours. But we will have some thunderstorm chances in the second half of the TAF period that could be MVFR/IFR, in which PROB30s have been noted. Winds generally will be out of the south to southwest for the most part and be in the 10 to 15kt range. Overnight storms near TAF sites, especially KGUY will be possible, but confidence is low, and we`ll deal with them via amendments.
Weber
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.AMA WATCHES/WARNINGS/ADVISORIES... TX...None. OK...None. &&
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SHORT TERM...89 LONG TERM....89 AVIATION...89
NWS AMA Office Area Forecast Discussion