WSE Implementation on 09/10/2007:

 

Water Supply Department Technical Input

 

Water Supply Outlook:

District wide, rainfall was 1.22” for the week ending 9/08/2007 (74% of average, 1.65”). Lake stage on 9/09/2007 is 9.58 ft, up 0.05 from last week. Full Phase III Water Shortage Restrictions for the Lake Okeechobee Service Area (LOSA), and Modified Phase II Water Shortage Restrictions for the Lower East Coast, are currently enacted. Individual utilities are able to enact stronger restrictions based on their unique circumstances.

 

The September 2007 SFWMM Position Analysis percentile graph and tracking chart for Lake Okeechobee show that the current lake stage is below the Supply-Side Management line, and has a little more than 10% chance to move back into Zone E in the next two months.

 

The short-term WSE tributary indices for the regions north of the lake have been low for this time of the year. The 30-Day Net Rainfall has dropped again this past week. However, the Net Rainfall and the Two-Week Moving Average S65E Flow are still in the normal range. The long-term Palmer Drought Severity Index (PDSI)* as of 9/08/2007 indicates that the tributaries north of the Lake are extremely dry.

 

 

*The PDSI is an indicator of a seasonal moisture anomaly from what is climatically expected.

 

Water Supply Risk Evaluation

Area

Indicator

Value

Color Coded      Scoring Scheme

LOK

Projected LOK Stage for the next two months

SSM

H

Palmer Index for LOK Tributary Conditions

-2.56

H

(Extremely Dry)

CPC Precipitation Outlook

1 month: Above Normal

L

3 months:  Above Normal

LOK Seasonal Net Inflow Forecast

0.48 ft    (Dry)

M

AMO/La Nina

LOK Multi-Seasonal Net Inflow Forecast

0.01 ft    (Dry)

H

AMO/La Nina

WCAs

WCA 1: Sites 1-7, 1-8T & 1-9

Above Line 1 (16.39 ft)

L

WCA 2A: Site 2-17

Above Line 1  (12.51 ft)

L

WCA-3A: Sites 63, 64 & 65

Line 1 – Line 2  (9.09 ft)

M

LEC

Service Area 1

Phase 2

H

Service Area 2

Phase 2

H

Service Area 3

Phase 2

H

 

 

 

 

 

 

 

 

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