Weatherfolk Presented by Joel Lanier Senior Service Hydrologist 27 Sep 2012

Gainesville.com Live Oak, Fl

St. Mary’s Circle

Sat 23 June

Sun 24 June

Mon 25 June

Tue 26 June

Wed 27 June

 Upper Level Low in SW Gulf of Mexico  21 Jun – Sfc Low Developed near Yucatan  23 Jun – Sfc Low moved into Gulf of Mexico Becomes TS Debby  23 Jun – Heavy rain N Tampa  24 Jun – Coastal Trof Develops Heavy rain E Florida Panhandle  25 Jun – Cold Front Enhances Coastal Trof Heavy rain NE Florida

Sat 23 June

Sun 24 June

Mon 25 June

Tue 26 June

Wed 27 June

EarthSky -

NOAA NWS HPC

 39 Flood Warnings and Statements Issued for St. Mary’s River at MacClenny  Above Flood Stage 26 Jun 06Z - 9 Jul 21Z  Record Crest ft 28 Jun 07:30Z  Record Flow 36,300 CFS

26,000 CFS 36,300 CFS 28,100 CFS 28,000 CFS

 23 Jun – Began Webinar & Video Briefings  27 Jun – WFO Tallahassee Notifies WFO Jax of Historic Flood Developing on lower St. Mary’s  27 Jun – WFO Jacksonville Coordinates the Issuance of a River Flood Emergency Flood Warning for the entire length of the St. Mary’s River below MacClenny.

National Weather Service Southeast River Forecast Center Daily Operational Overview Message 1:40 p.m. June 27, 2012 There are 18 communities currently in flood, including 8 in major flood. Moderate or Major Flooding Occurring or Expected Macclenny – St. Marys River (MAJOR)

 23 Jun – Began Webinar & Video Briefings  27 Jun – WFO Tallahassee Notifies WFO Jax of Historic Flood Developing on lower St. Mary’s  27 Jun – WFO Jacksonville Coordinates the Issuance of a River Flood Emergency Flood Warning for the entire length of the St. Mary’s River below MacClenny.

A HISTORIC FLOOD IS OCCURRING ON THE ST. MARYS RIVER DUE TO VERYHEAVY RAINFALL FROM TROPICAL STORM DEBBY. RAPID RISES ALONG THE ST.MARYS RIVER AND ITS TRIBUTARIES ARE EXPECTED WITHIN THE NEXT 24HOURS...AND THESE FLOOD WATERS WILL AFFECT RESIDENTS ALONG THE RIVERBASIN IN NASSAU...BAKER...CHARLTON AND CAMDEN COUNTIES. AREAS THAT DO NOT NORMALLY FLOOD ALONG THE ST. MARYS RIVER WILLFLOOD ANYWHERE ALONG THE LENGTH OF THE RIVER. EXTREME FLOODING MAYOCCUR AT FLEA HILL AND KINGS FERRY WITHIN THE NEXT 24 HOURS TO 36HOURS. OVERLAND FLOODING WILL EXTEND TO AND CONNECT WITH THE SATILLARIVER TO THE NORTH ALONG AND WEST OF THE STATE ROAD 110 IN GEORGIAEAST OF FOLKSTON.