WSE Implementation on 12/03/2007:

 

Water Supply Department Technical Input

 

Water Supply Outlook:

District wide, rainfall was 0.29” for the week ending 12/01/2007 (47% of average, 0.62”). Lake stage on 12/02/2007 is 10.26 ft, down 0.04 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.

 

The November 2007 SFWMM Position Analysis percentile graph and tracking chart for Lake Okeechobee show that the current lake stage is below the Water Restrictions Trigger Line, and has less than a 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 are declining. Both the 30-Day Net Rainfall and the Two-Week Moving Average S65E Flow have dropped into the dry range. The long-term Palmer Drought Severity Index (PDSI)* as of 12/01/2007 indicates that the tributaries north of the Lake are considered 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

Water Restrictions Zone

H

Palmer Index for LOK Tributary Conditions

-2.74

H

(Extremely Dry)

CPC Precipitation Outlook

1 month: Below Normal

M

3 months: Below Normal

LOK Seasonal Net Inflow Forecast

-0.62 ft    (Very Dry)

H

AMO/La Nina

LOK Multi-Seasonal Net Inflow Forecast

2.01 ft    (Normal)

M

AMO/La Nina

WCAs

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

Above Line 1 (16.90 ft)

L

WCA 2A: Site 2-17

Above Line 1  (12.85 ft)

L

WCA-3A: Sites 63, 64 & 65

Above Line 1  (10.10 ft)

L

LEC

Service Area 1

Phase 2

H

Service Area 2

Phase 2

H

Service Area 3

Phase 2

H

 

 

 

 

 

 

 

 

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