NOAA’s National Weather Service 2010 Spring Flood Outlook #2 March 5, 2010 By: Darrin Hansing ILX Service Hydrologist

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Winter Precipitation Spring Flood Outlook #2 – Issued March 5, 2010

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Soil Conditions Spring Flood Outlook #2 – Issued March 5, 2010 Soil Depth 0” - 12”Soil Depth 0” - 72” Soil moisture 20 to 30% above normal

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L River Conditions Illinois Streamflow Conditions ● The colors represent current streamflow percentiles compared to historical daily values. compared to historical daily values. ● Only gages with at least 30 years of records are used. ● Overall above normal streamflows in central sections of Illinois with normal to below normal Illinois with normal to below normal conditions across the remainder of conditions across the remainder of the state. the state. ● Currently no flooding occurring across Illinois. across Illinois. Spring Flood Outlook #2 – Issued March 5, 2010

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Snow pack and SWE Spring Flood Outlook #2 – Issued March 5, 2010 Snow Water Equivalent Snow Depth

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Snow pack and SWE Spring Flood Outlook #2 – Issued March 5, 2010 Snow Water Equivalent Snow Depth

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Flood Outlook Summary Below normal probability for Below normal probability for reaching flood stage reaching flood stage Near normal probability for Near normal probability for reaching flood stage reaching flood stage > 20% above normal probability for > 20% above normal probability for reaching flood stage reaching flood stage 6% 20% above normal probability 6% 20% above normal probability for reaching flood stage for reaching flood stage

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Flood Outlook Comparisons Feb 19 th Outlook Below normal Near normal > 20% above normal 6% to 20% above normal Mar 5 th Outlook

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Flood Outlook Summary - What can we expect? Spring Flood Outlook #2 – Issued March 5, 2010

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Flood Outlook Summary - What can we expect? Spring Flood Outlook #2 – Issued March 5, 2010 March 5 th issuance February 19 th issuance

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Outlooks 6 – 10 Day Outlooks Spring Flood Outlook #2 – Issued March 5, 2010

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Outlooks 30 Day Outlooks Spring Flood Outlook #2 – Issued March 5, 2010

N a t i o n a l W e a t h e r S e r v i c e L i n c o l n, I L Outlooks 30 – 90 Day Outlooks Spring Flood Outlook #2 – Issued March 5, 2010