Daily News | In the Philly region’s tornado outbreak, it was the sun that helped light the fuse
The rains had shut off, and the sun that has been gaining power daily emerged to bestow a splendid April afternoon on the Philadelphia region. Temperatures had warmed to 70 degreesBut the meteorologists on duty were aware that the sun’s appearance meant trouble. It was lighting a fuse, its energy supplying fuel to a tremendously volatile atmosphere.
A major barrier to drawing conclusions about a climate-change role, say Bunting and other tornado experts, is the database. Since the weather service modernization in the 1990s and the use of Doppler radar, tornado detection has improved immensely. However, the database has experienced enormous increases in weaker tornadoes in recent years, and that, in all likelihood, is about improved detection.Bunting added, however, that the lack of those drying, air-cleansing, wintry cold fronts that were so absent in
“That’s a very important signature,” he said. “It’s a sign that this is a day to take seriously.” Thunderstorms are launched by warm air rising over cooler air, causing moisture to condense. In this case, the air was rocketing upward.“Once we realized there we gong to be ample daytime heating, the only question is how bad is it going to be.”The answers began coming shortly after 6 p.m.
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