This was in a long-gone 2005 blog by Jon Richards but it's still relevant: He explains why it didn't get as warm as it was supposed to earlier this week, and why it's so cold today Forecasts Get It Wrong Three Days In a Row For the last three days, the predicted high temperatures in metro Atlanta haven’t been what they were forecast to be. As detailed here , Monday’s miss was caused by a slow moving warm front. On Tuesday, we were supposed to reach a high of 70 degrees, before retreating to a low in the lower sixties today. Instead, we had a high of 60 Tuesday, and broke 70 degrees for the first time this year on Wednesday. Tuesday’s colder than expected temperatures were caused by a combination of heavy fog in the morning and a mini wedge, where the colder air closer to the ground was overrun by the warmer air approaching from the southwest. Overnight Monday, the skies cleared, and due to Monday’s rain, fog developed close to the ground. As the warmer air approached Tuesd...
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