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SNAKE - LOWER GRANITE DAM (LGDW1)
Forecasts for Water Year 2027
Official Water Supply
ESP with 10 Days QPF     Ensemble: 2026-10-10 Issued: 2026-10-10 Hide Forecast
Forecasts Are in KAF 30 Year
Average
(1991-2020)
90 % 50 % %
Average		 10 %
APR-SEP 12560 19052 86 28914 22232
APR-JUL 10693 16838 84 26244 19946
APR-AUG 11609 17985 85 27638 21121
JAN-SEP 18099 25545 86 37974 29736
JAN-JUL 16211 23430 85 35164 27450
OCT-SEP 22078 29779 87 42436 34287
Experimental Water Supply
HEFS with 15 days EQPF    Ensemble: 2026-10-10  Issued: 2026-10-10 Hide Forecast
APR-SEP 12581 18505 83 29184 22232
APR-JUL 10718 16196 81 26519 19946
APR-AUG 11630 17374 82 27908 21121
JAN-SEP 18315 25667 86 37885 29736
JAN-JUL 16444 23358 85 35046 27450
OCT-SEP 22300 29949 87 42291 34287
Reference
ESP with 0 Days QPF    Ensemble: 2026-10-10  Issued: 2026-10-10 Hide Forecast
APR-SEP 12691 18661 84 28551 22232
APR-JUL 10806 16383 82 25894 19946
APR-AUG 11731 17542 83 27271 21121
JAN-SEP 18504 25662 86 39134 29736
JAN-JUL 16643 23250 85 36342 27450
OCT-SEP 22318 29635 86 43199 34287
Move the mouse over the desired "Forecast Period" to display a graph.
<table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 2, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>38505</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>28419</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>23294</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>19682</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>16094</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12790</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11426</td></tr> </table> <table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 3, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>40260</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>28843</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>23943</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>19494</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>16296</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12653</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11678</td></tr> </table> <table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 4, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>40033</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>28699</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>23878</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>19194</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>16172</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12590</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11377</td></tr> </table> <table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 5, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>39578</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>28150</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>23562</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>18962</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>15962</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12354</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11149</td></tr> </table> <table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 6, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>39628</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>29096</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>24068</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>18817</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>16359</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12432</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11297</td></tr> </table> <table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 7, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>39528</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>28974</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>23898</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>18827</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>16546</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12945</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11201</td></tr> </table> <table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 8, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>39611</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>28994</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>24057</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>19085</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>16786</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12713</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11322</td></tr> </table> <table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 9, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>39373</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>29149</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>24079</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>19190</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>16797</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12796</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11370</td></tr> </table> <table id=popup_table> <tr><td id=popup_table_td_ESPTYPE colspan=2>ESP10<br><label id=popup_table_td_date>Oct 10, 2026</label></td></tr> <tr><td id=popup_table_td_data_max>MAX:</td><td id=popup_table_td_data>38927</td></tr> <tr><td id=popup_table_td_data_10>10%:</td><td id=popup_table_td_data>28914</td></tr> <tr><td id=popup_table_td_data_25>25%:</td><td id=popup_table_td_data>23832</td></tr> <tr><td id=popup_table_td_data_50>50%:</td><td id=popup_table_td_data_50>19052</td></tr> <tr><td id=popup_table_td_data_75>75%:</td><td id=popup_table_td_data>16220</td></tr> <tr><td id=popup_table_td_data_90>90%:</td><td id=popup_table_td_data>12560</td></tr> <tr><td id=popup_table_td_data_min>MIN:</td><td id=popup_table_td_data>11221</td></tr> </table> Link to image of plot 
  • LGDW1W_SQIN.ESPF0.csv|2026-10-10
  • LGDW1W_SQIN.ESPF10.csv|2026-10-10
  • LGDW1W_SQIN.ESPFM.csv|2026-10-10



APR-SEP

#FFF68F
#33CCFF
#404040
#660066
#F00007
#66CCFF
ESP10,ESPM,ESP0
ESP10,ESPM,ESP0
Last Forecast