alberto frances, etc sept atl floods
TRANSCRIPT
Water SupplyImplications of the Seasonal Outlook for ACF
1. Big Picture – Past to Current Conditions2. Early Winter – Ensemble Streamflow Forecasts3. La Niña and Past Streamflows4. La Niña and Lake Lanier
Big Picture – Past to Current ConditionsTrends in Winter Rainfall for Georgia
Rainfall Accumulations Dec-Feb
Big Picture – Past to Current ConditionsTrends in Spring Rainfall for Georgia
Rainfall Accumulations Feb-Apr
Big Picture – Past to Current ConditionsTrends in Summer Rainfall for Georgia
Rainfall Accumulations May-Jul
Big Picture – Past to Current ConditionsTrends in Summer Temperature for Georgia
Average Temperature Jun-Aug
Big Picture – Past to Current ConditionsTrends in Tropical Rainfall for Georgia
Rainfall Accumulations Aug-Oct
Alberto
Frances, etc
Sept ATL Floods
Big Picture – Past to Current ConditionsTrends in Autumn Rainfall for Georgia
Rainfall Accumulations Sep-Nov
Big Picture – Past to Current ConditionsTrends in Recharge Rainfall for Lake Lanier
Rainfall Accumulations Dec-Mar for Climate Division 2 and 3
Climate Division 2 Climate Division 3
La Niña and Past Georgia Streamflows
Period Type Percent of Georgia Streamflows to Normal for the Period*
1954-1956 Mod to Strong 50 -70
1964-1965 Mod 120-180
1970-1972 Mod 80-110
1973-1976 Mod to Strong 100-150
1988-1989 Mod to Strong 50-80
1998-2000 Mod to Strong 50-80
2007-2008 Mod 50-60
2010-2011 Mod? ???
* Note: Streamflow % based on USGS Historical Runoff Values that are derived from streamflows
La Niña and Past Apalachicola Streamflows
Period Type Percent of Apalachicola HUC0313 Streamflows to Normal for the Period*
1954-1956 Mod to strong 50 -60
1964-1965 Mod 130-160
1970-1972 Mod 90-120
1973-1976 Mod to Strong 110-160
1988-1989 Mod to Strong 70-80
1998-2000 Mod to Strong 40-80
2007-2008 Mod 40-60
2010-2011 Mod? ???
* Note: Streamflow % based on USGS Historical Runoff Values that are derived from streamflows
La Niña and Past Apalachicola Streamflows
Period Type Autumn Winter Spring Summer
1954-1956 Mod/Strong 50 -60 60-70 60-70 50-80
1964-1965 Mod 130-160 110-200 100-140 100-200
1970-1972 Mod 120-130 80-100 100-140 100-110
1973-1976 Mod/Strong 120-150 100-170 100-150 100-150
1988-1989 Mod/Strong 40-80 70 60 60
1998-2000 Mod to Strong
40-80 40-80 40-80 40-50
2007-2008 Mod 60-70 30-50 30-40 30-50
2010-2011 Mod? ???
* Note: Streamflow % based on USGS Historical Runoff Values that are derived from streamflows
La Niña and Lake Lanier Inflows
Period Type Percent of Inflow compared to Normal*
1954-1956 Mod to strong NA
1964-1965 Mod 100-140
1970-1972 Mod 75-110
1973-1976 Mod to Strong 110-150
1988-1989 Mod to Strong 40-90
1998-2000 Mod to Strong 50-60
2007-2008 Mod 50-60
2010-2011 Mod? ???
* Note: Inflows based on data from the Corps Of Engineers calculated inflow values