All-time May record low temperature of -9.5°C was measured at 850 millibars (4658' asl) by the balloon launched near Dulles (IAD) this morning. The old record was -7.9°C. #record #cold #mdwx #vawx— Tom Tasselmyer (@ttasselWBAL) May 9, 2020
All-time May record low temperature of -9.5°C was measured at 850 millibars (4658' asl) by the balloon launched near Dulles (IAD) this morning. The old record was -7.9°C. #record #cold #mdwx #vawx