


Area Forecast Discussion
Issued by NWS Amarillo, TX
Issued by NWS Amarillo, TX
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896 FXUS64 KAMA 111747 AFDAMA Area Forecast Discussion National Weather Service Amarillo TX 1247 PM CDT Fri Jul 11 2025 ...New KEY MESSAGES, SHORT TERM, LONG TERM, AVIATION, HYDROLOGY... .KEY MESSAGES... Issued at 1217 PM CDT Fri Jul 11 2025 This afternoon through Saturday, the risk for flooding increases across the Panhandles. Very heavy rain may occur with any rain shower or thunderstorms that can cause flooding. A low end risk for severe thunderstorms exists this evening. Damaging winds and hail are the primary hazards. Daily thunderstorm chances for the next 7 days expected to potentially compound flooding concerns. A low end severe thunderstorm risk may continue as well. && .SHORT TERM... (This evening through Saturday night) Issued at 1217 PM CDT Fri Jul 11 2025 Bottom line: Extremely high moisture will allow for heavy to torrential rainfall from any rain shower or thunderstorm that then can lead to flooding. There is a low chance that a few storms turn strong to severe with damaging winds and large hail. The southern plains continues to find itself under a weather pattern consisting of high pressure to the west and east of the region and with a broad trough over the region. This pattern is drawing up copious amounts of moisture from the Gulf across the southern plains including the panhandles. The trough is rotating small weather systems across the southern plains which will be the driving force for the formation of rain showers and thunderstorms for the next several days. The first of these weather system is most likely to arrive late this afternoon through the early morning hours of Saturday, this is the most likely scenario and reflected in the forecast. However, there is a little uncertainty that says this may get held up and not arrive til Saturday morning through afternoon but this is a lower chance so will not be reflected in the forecast. While most of the weather today and tonight will be associated with this weather system, there is a low chance for a few isolated thunderstorms ahead of the system in the central TX panhandle for the early afternoon. The passage of the weather system will start in the NW panhandles later this afternoon and evening. This system then slowly crosses the panhandles impacting Amarillo, canyon and Palo Duro Canyon area around midnight. Finally the weather system in large pushes to the south of the panhandles during the early morning hours of Saturday. The environment that this weather system will be pushing into is showing CAPE in the 1000-2000 J/Kg range with shear of 20 KT to 30 KT. This will allow for a few of the storms to turn strong to severe producing both damaging winds and large hail. The environment will become progressively moister during the storms passage with initial PWATs of around 1.2in increasing to around 1.5in. This means the moisture will be increasing from above normal to extremely high amounts close or even above observed daily maximum moisture amounts. That translate to all rain showers and thunderstorms being able to produce heavy to even torrential rainfall. This rainfall will be maximized in those strong to severe thunderstorms which will be fully capable of producing rain rates 2 in/hr to 6 in/hr. The storm motion is such that even with these absurdly high rain rates rain accumulation at any spot will more likely range from 1 to 4 inches. Such rainfall can lead to flooding especially in areas with poor drainages, that are prone to flooding, or areas of topography that concentrate water such as Palo Duro Canyon. The heavy rainfall is most likely to occur during the overnight hours which will make any nocturnal flooding harder to detect. Following the passage of this weather system there is a moderate chance for further rain showers and thunderstorms to develop in the panhandles for early to mid Saturday morning. If these occur they will most likely be weaker overall as the passage of the weather system will have taken the lions share of the atmosphere instability. However, the moisture will still be present so heavy rainfall may still occur with any of these storms. This rainfall has the potential to add to any flooding caused by the passage of the earlier weather system. These storms are then most likely to dissipate by the later morning as the atmosphere stabilizes. Going into Saturday afternoon there is most likely to be enough instability and heating to flair up additional rain showers and thunderstorms in the panhandles. The question is to what extent these storms will encompass the panhandles which largely depends on early convection. The more convection we have during Friday to the early morning hours of Saturday the less convection we will have for the afternoon and evening of Saturday. If we have less convection earlier then additional rain showers and thunderstorms will form for Saturday afternoon and evening. Regardless of coverage the moisture will remain high so the storms will still be capable of heavy rainfall that can lead to flooding. && .LONG TERM... (Sunday through next Thursday) Issued at 1217 PM CDT Fri Jul 11 2025 For next week the pattern in large remains the same through to the mid week. This makes it most likely for moisture to remain across the panhandles leading to daily rain showers and thunderstorms. If the moisture remains high then these storms will be capable of producing heavy rainfall with associated flood concerns. For the mid next week to next weekend there is increasing confidence for the pattern to shift slightly with the eastern high pressure building westward over the southern plains. This would make it less favorable for Gulf moisture to reach the panhandles as it will have to cross a larger area of land to do so. This reduction in moisture will most likely not stop the daily rain showers and thunderstorms just make them less likely to produce any heavy rainfall. At least for now the whole of next week still is more likely than not remain active with daily rain showers and thunderstorms. && .AVIATION... (18Z TAFS) Issued at 1217 PM CDT Fri Jul 11 2025 VFR conditions continue through the early afternoon until the passage of a weather system. The weather system bring rain showers and thunderstorms to the panhandles late this afternoon through the overnight hours starting in the NW and moving to the SE. All terminals will be impacted by these rain showers and thunderstorms which can produce torrential rainfall reducing conditions to IFR or worse during their passage. There is a low chance that a few storms become strong to severe with damaging winds and large hail. There is a low to moderate chance that following the main line of storms additional rain showers and thunderstorms persist over the panhandles for early Saturday morning. Conditions then improve for the mid to late Saturday morning with additional chance for further rain showers and thunderstorms during Saturday afternoon and evening. && .HYDROLOGY... Issued at 1217 PM CDT Fri Jul 11 2025 Very high to extremely high moisture is moving across the southern plains including the panhandles. This will allow all rain showers and thunderstorms this afternoon through Saturday to produce heavy to torrential rainfall. Such rainfall can lead to flooding especially in areas with poor drainage, prone to flooding, or areas the concentrate water like Palo Duro Canyon. The heavy rainfall is most likely to occur during the overnight hours which will make any nocturnal flooding harder to detect. && .AMA WATCHES/WARNINGS/ADVISORIES... TX...Flood Watch from 7 PM CDT this evening through late Saturday night for TXZ001>020-317. OK...Flood Watch from 7 PM CDT this evening through late Saturday night for OKZ001>003. && $$ SHORT TERM...98 LONG TERM....98 AVIATION...98