July brings another month of above-average rainfall
A map illustrates rainfall conditions in July across the St. Johns River Water Management District.
PALATKA, Fla., Aug. 8, 2023 — A majority of the St. Johns River Water Management District’s 18-county region received above-average rainfall in July, with the exception of Clay, Alachua, Lake, Osceola and portions of western Seminole and Duval counties which all received average to below-average rainfall.
A map illustrates rainfall conditions in July across the St. Johns River Water Management District.
A full report outlining July’s hydrologic conditions was presented at the District’s Governing Board meeting Tuesday. Highlights include:
Rainfall
- Districtwide, July rainfall averaged 6.84 inches, which is 1.27 inches above the average for the month.
- Districtwide, the cumulative rainfall total for the past 12 months is 51.01 inches, which is 5 inches above the long-term average.
- Rainfall over the past 12 months was above average throughout most of the District with the exception of Baker, Nassau and Duval counties.
- Countywide rainfall totals ranged from a high of 69.8 inches in Seminole County to a low of 43.7 inches in Nassau County.
Groundwater
- At the end of July, Upper Floridan aquifer conditions were in the normal range, except for some areas in Duval and northern St. Johns counties, where aquifer conditions were in the low range. Additionally, small zones of high conditions were recorded in Volusia and northern Brevard counties.
- Groundwater levels expressed as a single districtwide index are at the 69th percentile, which is in the normal range for this time of year.
Spring flows
- The mean monthly flow at Silver Springs is in the high range for this time of year at 653 cubic feet per second (cfs), or 422 million gallons per day (mgd), which is a 117 cfs increase from June’s mean.
- At the Blue Spring station in Volusia County, the mean monthly flow was 152 cfs, or 98 mgd, which is in the high range.
- At Rock Springs, the monthly mean flow increased slightly and remains in the high range with an increase of 1 cfs to 61 cfs (40 mgd).
- Mean monthly flow at Wekiwa Springs is in the high range for this time of year at 69 cfs (44 mgd).
To learn more about rainfall totals and other hydrologic data collected, visit www.sjrwmd.com.
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