Outside Convection coefficient in EnergyPlus

I defined the outside face convection coefficient as an output. I see in some hours during the simulation, this coefficient is 1000 !!! How is that possible? And also in general , which method is more accurate? Because I changed the SurfaceConvectionAlgorithm:Outside from DOE-2 to AdaptiveConvectionAlgorithm and saw a significant difference in one of my outputs.

According to Energyplus Engineering Reference (http://bigladdersoftware.com/epx/docs...):

Note that when the outside environment indicates that it is raining, the exterior surfaces (exposed to wind) are assumed to be wet. The convection coefficient is set to a very high number (1000) and the outside temperature used for the surface will be the wet-bulb temperature. (If you choose to report this variable, you will see 1000 as its value.)

It seems that you have rain data included in your weather file.