Pennsylvania Fly Fishing Hatch Chart

Hatch Common NameHook SizeStart DateStart timeLatin Name
Little Blue Winged Olive16-2015-Mar10:00 AM - 4:00 PMEphemerella & Baetis
Blue Quill16-1817-Apr11:30 AM - 3:00 PMParaleptophlebia adoptiva
Quill Gordon12-1417-Apr1:30 PM - 6:30 PMEpeorus pleuralis
Hendrickson Female1219-Apr2:00 PM - 6:30 PMEphemerella subvaria
Red Quill Male1419-Apr2:00 PM - 6:30 PMEphemerella subvaria
Sulphurs14-1610-May7:00 PMEphemerella rotunda, dorthea, & others
March Brown10-1212-MayAll DayStenonema vicarium
Gray Fox10-1212-May10:00AM - NoonStenonema fuscum
Light Cahill1418-May8:00 PMStenacron
Blue Winged Olive14-1820-May10:00 AM - 3:00 PMBaetidae
Green Drake8-1024-May8:00 PMEphemera guttulata
Brown Drake10-1426-May8:00 PMEphemera simulans
Slate Drake12-1426-May5:00 PMIsonychia bicolor & sadleri
Trico20-2415-Jul7:00 AM -NoonTricorythodes stygiatus
White Fly10-14Early August7:30 PMEphoron lekon
Slate Drake12-14August-OctoberNoon - 4:00 PMIsonychia
In the Pocketguide to Pennsylvania Hatches by Charles Meck & Paul Weamer, The following hatch chart variation map is shown to help adjust for local variations according to traditional temperature ranges.

Hatch Chart Variation by Charles Meck

Since there is such a range of hatches throughout the state, which region or area would you say that the hatch chart info that you posted is based on? I'm trying to get a better understanding of how it might be different from where i am locally as well as when i travel to fish other parts of the state in the spring.