Dan Robinson
After driving through heavy snow in the WV mountains this morning on my way to Raleigh, NC, my car accumulated a heavy coating of road salt. I stopped at a 'touchless' car wash to rinse it off, the ones that use pressurized jets of water. My car has a factory-installed outside thermometer that is surprisingly accurate. The outside temperature was 49F when I entered the car wash. (I later checked the nearest ASOS to see the dewpoints were in the teens).
About 2 minutes after I left the car wash and got back on the interstate, the thermometer reading dropped to 33F, then slowly crept back up to 49F again. Apparently the sensor got wet from the water jets, than as I started driving again, the airflow evaporated the water on the sensor. It's probably not the most accurate wet bulb reading, but I thought it was interesting.
About 2 minutes after I left the car wash and got back on the interstate, the thermometer reading dropped to 33F, then slowly crept back up to 49F again. Apparently the sensor got wet from the water jets, than as I started driving again, the airflow evaporated the water on the sensor. It's probably not the most accurate wet bulb reading, but I thought it was interesting.