I would suggest learning how to read a Skew-T we use in meteorology. A good site to look at good data would be
www.twisterdata.com and then click on the "RAP", then use the map to select your location in the United States, then you will be given a Skew-T chart which is basically a splice of the atmosphere from the surface to the top of the troposphere.
From that page you can choose the "show text" option above the Skew-T. This will display as a table that begins at the surface (Highest Pressure Level) and from there will go up in altitude and the corresponding pressure level will drop with height at 25mb increments.
To see the winds at specific heights, look at the HGHT box that will be in Meters, then look at the two boxes labeled DRCT and SKNT which are wind direction (from) in degrees, and speed in knots.
From there just convert to imperial.
*Important*
I do not suggest using any other model than the RAP because its a high-resolution model that updates every single hour and this model is what the NWS Storm Prediction Center uses to base their current mesoanalysis products on.
In the Southeast and Midwest be mindful of the nocturnal Low Level Jet that increases throughout the day just above the surface along with a strong low level jet ahead of any approaching frontal or low pressure system.
Lastly, maybe the biggest piece of advice I can recommend to anyone is reading the local AFD (Area Forecast Discussion) from your local NWS Office that is updated every few hours. To find that, first figure out what NWS Office serves you, then just google your specific "NWS Office" + AFD. For example here in Cola,
SC you would google NWS CAE AFD and it will be one of the first 3 or 4 results. Just replace CAE with your local WFO Office. In that, you will find a detailed synopsis of everything you would need to know including a detailed Aviation Discussion that will highlight things like high winds, low level wind shear, and so on.
If you ever have any wx related questions, feel free to shoot me a message.
Hope this is helpful.
- Chris