All I can say this is abnormal. I would like to look into it further what CWOP station and airport do you compare to?
I agree. But all I can go by is the list of nearby stations at the bottom of the Data quality page.
EW6758 14.7 miles North Georgetown, LA, US -0.6mb -1.6°F -1.1°F
KAEX 17.6 miles South ALEXANDRIA INTERNATIONAL AIRPORT, LA, United States -0.1mb -0.6°F 1.7°F
EW6201 22.7 miles South Alexandria, LA, US 0.5mb -1.1°F 0.7°F
UP886 22.7 miles Northeast Urania, LA, -0.2°F
KESF 22.9 miles Southeast ALEXANDRIA ESLER RGNL AIRPORT , LA, -0.5mb 0.0°F 0.5°F
UR391 29.1 miles South Wilgln, LA, United States Of America 2.2°F
KIER 31.1 miles West Natchitoches, Natchitoches Regional Airport, LA, -0.5mb -1.8°F 1.7°F
UP368 34.3 miles South Meeker, LA, United States Of America -0.3°F
KAQV 42.2 miles West Ft. Polk, Peason Ridge, LA, United States -0.4mb -0.7°F 2.7°F
KBKB 43.1 miles Southwest Ft. Polk, Fullerton Landing Strip, LA, United States -0.1mb -1.5°F 0.6°F
And of these that I looked at recently, many of their Quality checks are also flagged for high humidity/dew point.
Oh FYI I'm DW5212 (D5212 MADIS)