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Colorado Historical Surface Water Supply Indices

Historical SWSI Values for Colorado

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
 

Basin

Date

Gunnison Colorado South Platte

Yampa, White
 & N. Platte

Arkansas Rio Grande

San Juan,
 Animas,
 Dolores,
 & San Miguel

June-81 -1.4 -1.0 2.0 -2.0 0.0 -1.5 -1.3
July-81 -2.7 -2.6 1.4 -2.1 0.1 -1.3 -0.9
August-81 -2.5 -2.8 -2.1 -1.9 -0.8 -2.2 -0.9
September-81 -3.2 -2.6 -1.7 -3.3 0.1 -2 -1.6
October-81 -2.3 -0.7 -1.9 -2.6 1.8 0.1 0.1
November-81 -1.1 -1.3 0.5 -1.7 0.8 2.6 1.9
December-81 0.5 -0.2 -1.5 0.0 0.8 -1.2 0.3
January-82 1.3 1.6 0.1 3.6 1.3 0.8 -0.8
February-82 2.0 2.0 1.8 3.2 2.0 0.97 1.3
March-82 1.2 0.7 -0.3 1.1 1.0 0.9 1.0
April-82 2.0 0.8 -0.5 2.0 0.9 2.4 2.2
May-82 1.8 0.4 -1.0 1.6 0.7 1.9 1.8
June-82 -0.8 -1.6 0.7 0.4 -0.7 -1.4 -0.2
July-82 0.4 0.1 0.4 1.5 0.1 3.3 0.7
August-82 -0.5 1.6 1.6 3.0 1.4 1.2 1.9
September-82 2.0 2.7 2.1 2.4 2.8 2.2 3.8
October-82 2.5 3.7 2.6 2.4 3.5 3.9 3.3
November-82 1.1 2.9 2.3 2.5 3.1 3.2 2.2
December-82 2.4 1.2 0.1 1.6 -0.5 1.4 2.6
January-83 0.7 0.7 1.0 0.2 -1.5 1.4 1.6
February-83 -1.4 -1.2 0.2 -1.8 -2.1 0.3 0.3
March-83 -1.5 -1.5 -0.5 -2.4 -2.5 -0.1 0.2
April-83 2.0 0.2 1.3 -0.5 -1.1 1.4 1.8
May-83 1.8 1.5 1.6 0.3 0.0 2.0 2.0
June-83 1.8 -0.5 2.4 -2.2 0.2 -2.5 0.5
July-83 3.3 3.1 3.0 3.5 3.2 2.4 2.7
August-83 3.0 3.8 3.2 4.0 3.5 2.5 3.5
September-83 3.5 4.0 3.6 3.6 3.6 1.8 3.2
October-83 2.3 3.6 3.4 1.4 1.7 -0.1 2.9
November-83 2.0 2.9 3.0 2.6 2.3 1.4 1.5
December-83 2.9 2.8 3.2 3.5 2.5 1.3 1.9
January-84 3.9 4 3.8 4.1 4.1 4.1 4.0
February-84 3.5 3.4 3.5 3.7 2.4 2.6 2.8
March-84 3.2 2.7 3.2 2.5 1.8 1.95 2.4
April-84 2.8 3.0 3.3 2.7 2.4 1.5 2.0
May-84 2.7 2.7 3.2 3.5 2.7 1.8 1.1
June-84 3.4 3.8 3.1 3.5 3.0 2.5 3.5
July-84 3.8 3.5 3.3 3.7 3.6 1.3 1.4
August-84 3.6 3.4 3.3 3.8 3.4 1.7 2.0
September-84 3.6 4.0 3.8 3.8 2.1 1.8 3.3
October-84 2.9 3.9 3.6 3.7 3.4 1.9 2.1
November-84 3.5 4.0 4.0 3.7 3.3 2.5 2.7
December-84 3.2 2.0 2.2 2.4 1.2 2.5 3.2
January-85 3.2 2.6 2.7 1.9 3.0 2.9 2.8
February-85 1.4 1.0 2.5 0.3 1.6 2.3 2.0
March-85 0.2 -0.7 1.6 -1.7 -0.6 2.0 1.3
April-85 1.9 -0.3 1.6 -1.2 0.4 2.9 2.1
May-85 2.2 0.7 1.7 -1.1 0.8 2.8 2.2
June-85 2.3 3.2 3.4 3.2 3.9 3.0 2.7
July-85 2.8 2.0 3.1 2.5 3.2 2.7 2.4
August-85 2.5 1.7 3.4 2.3 2.6 2.7 2.4
September-85 1.4 1.7 2.9 1.7 0.3 1.8 0.9
October-85 2.4 2.5 3.8 2.1 2.4 2.9 3.4
November-85 3.2 3.7 3.6 3.7 2.3 3.2 3.0
December-85 2.8 3.5 2.2 3.8 3.3 1.8 2.1
January-86 2.7 3.6 2.9 3.8 2.2 2.0 1.6
February-86 0.5 2.1 2.3 1.3 0.3 -0.1 -0.3
March-86 1.9 3.0 3.2 2.7 2.2 0.0 0.6
April-86 0.8 1.6 2.5 2.6 0.7 0.8 0.8
May-86 1.1 1.9 2.6 1.3 0.8 1.9 1.8
June-86 2.1 1.1 2.9 2.4 2.5 2.2 2.2
July-86 3.3 1.2 3.6 1.9 3.3 3.0 2.2
August-86 3.1 1.9 3.3 3.0 2.1 2.1 3.0
September-86 1.9 2.1 3.4 2.7 3.1 2.4 1.5
October-86 2.7 3.6 3.4 3.5 2.7 3.3 3.4
November-86 3.0 3.9 3.6 3.7 2.6 3.3 3.3
December-86 2.1 2.2 2.6 3.5 3.1 2.1 1.7
January-87 1.5 0.0 2.1 -2.2 1.2 1.2 1.0
February-87 0.6 -1.1 2.0 -2.5 0.5 1.2 0.9
March-87 0.7 -1.8 2.1 -3.0 0.1 1.1 1.1
April-87 1.1 -2.1 2.1 -3.4 0.1 2.4 2.0
May-87 0.5 -2.7 1.6 -3.4 -1.2 2.2 1.6
June-87 2.9 0.4 3.9 -1.0 3.6 2.8 2.5
July-87 1.2 -1.7 3.2 -3.1 3.1 2.7 2.3
August-87 -0.2 -2.4 2.5 -1.3 1.0 1.9 1.9
September-87 1.9 1.6 2.3 1.8 3.8 3.3 3.3
October-87 2.1 0.8 3 -2.7 2.7 1.0 0.8
November-87 -0.4 -0.1 3.2 -1.5 1.7 -0.5 -0.6
December-87 2.6 2.3 2.8 2.6 1.8 2.4 3.1
January-88 -1.0 1.9 -1.1 -1.1 -0.6 -0.5 0.2
February-88 0.2 0.5 2.1 0.1 -0.2 0.1 0.2
March-88 -0.8 0.6 2.0 0.0 -0.5 -0.4 -0.4
April-88 -1.1 0.0 1.9 0.5 -1.9 -1.4 -1.4
May-88 -0.9 0.0 2.4 -0.7 -1.9 -1.0 -1.0
June-88 0.1 -1.2 3.2 -0.5 0.8 -3.1 -2.2
July-88 -2.1 -0.9 3.4 -0.3 1.4 -1.3 -0.8
August-88 -2.3 -1.9 2.5 -1.5 -0.6 -1.4 -1.3
September-88 -3.0 -2.4 3.1 -2.6 0.0 0.0 0.8
October-88 -2.2 -1.1 3.1 -0.3 0.2 1.1 2.5
November-88 -1.1 -2.2 2.2 -1.3 0.1 -0.6 0.8
December-88 0.2 0.7 0.6 2.5 0.8 0.0 1.2
January-89 0.5 0.0 0.5 0.1 -0.2 -0.7 0.5
February-89 -1.0 -1.7 0.6 -1.3 -1.1 0.4 0.5
March-89 0.6 0.0 1.8 -0.6 -0.7 1.8 1.6
April-89 -0.2 0.0 0.8 -1.8 -1.7 0.5 -0.1
May-89 -1.3 -0.4 0.8 -2.5 -2.2 -1.7 -1.4
June-89 -0.8 -1.4 2.4 -3.3 0.3 -0.7 -2.9
July-89 -2.1 -2.6 2.6 -3.5 -0.3 -1.8 -2.9
August-89 -1.9 -2.3 1.7 -2.8 1.2 -1.4 -2.0
September-89 -2.5 -1.2 1.1 -2.2 1.3 -1.6 -1.1
October-89 -2.3 -0.5 2.0 -3.2 0.0 -0.9 -2.7
November-89 -1.8 -1.7 0.8 -3.8 0.0 0.3 -2.0
December-89 -2.5 -2.1 -1.9 -1.5 -2.5 -3.3 -2.8
January-90 -2.6 -1.4 -0.4 1.5 -0.1 -3.4 -3.5
February-90 -2.8 -2.6 -0.5 -1.4 -1.8 -3.6 -3.6
March-90 -2.9 -2.6 -1.6 -1.8 -2.5 -3.2 -3.5
April-90 -2.8 -1.9 -0.5 -1.8 -2.3 -2.8 -3.3
May-90 -1.4 -1.7 -0.8 -2.6 -0.8 -0.5 -1.7
June-90 -1.4 -2.5 0.3 -3.8 -0.7 -1.7 -2.1
July-90 -1.9 -2.1 0.3 -2.4 0.6 -0.5 -2.7
August-90 -1.4 -2.3 1.4 -2.2 0.9 -0.7 -1.0
September-90 -2.6 -1.9 2.1 -3.5 0.5 -0.4 -0.7
October-90 -1.9 -0.6 2.1 -2.7 -0.1 0.0 0.3
November-90 -1.3 -0.6 1.8 -1.8 2.6 2.8 2.7
December-90 0.8 -0.7 -0.9 0.4 1.4 -0.1 0.7
January-91 0.2 -0.3 -0.6 0.1 2.6 1.5 0.2
February-91 -0.2 -1.6 -0.6 -1.1 -0.9 0.9 -0.3
March-91 -1.2 -2.1 -1.3 -2.3 -2.1 -0.4 -1.1
April-91 0.9 -0.9 -0.9 -0.7 -1.0 1.5 -0.1
May-91 1.4 0.3 -0.7 0.6 -0.6 1.3 -0.3
June-91 1.1 -0.5 0.7 -2.4 0.2 1.7 0.4
July-91 1.2 0.2 1.7 0.1 0.5 0.1 -0.4
August-91 0.8 0.4 1.4 0.0 0.1 -0.1 -0.9
September-91 -1.4 -0.7 1.9 -2.2 -0.4 -1.0 -1.5
October-91 -1.5 1.3 2.1 -0.7 -0.3 2.6 3.2
November-91 -1.4 -0.7 1.9 -2.2 -0.4 -1.0 -1.5
December-91 3.1 2.3 1.2 2.7 3.1 2.8 3.0
January-92 1.3 0.1 0.5 -1.0 2.1 1.8 1.6
February-92 -1.3 -1.8 -0.1 -2.4 -0.1 0.2 -0.5
March-92 -1.5 -2.0 -0.3 -2.9 -1.2 0.6 -0.4
April-92 0.1 -1.5 0.8 -3.3 -1.0 0.8 0.4
May-92 -1.3 -2.4 0.9 -3.6 -1.6 0.0 -0.5
June-92 1.0 -0.4 1.4 -1.6 1.2 -0.5 1.8
July-92 -1.4 -2.2 1.8 -3.5 0.1 -1.6 -0.6
August-92 -0.6 -2.0 1.4 -1.3 -0.1 -0.7 0.3
September-92 -0.8 -0.4 2.7 -2.6 1.4 0.1 1.2
October-92 -1.8 -0.8 1.9 -0.8 1.1 1.0 1.9
November-92 -0.7 -2.5 1.8 -2.4 0.5 0.1 -1.5
December-92 2.0 1.5 0.1 2.6 0.7 -0.9 0.2
January-93 0.9 0.3 0.0 0.0 0.1 0.7 0.1
February-93 2.0 -0.3 0.0 -0.3 0.0 2.4 2.3
March-93 3.1 2.0 0.9 0.1 2.0 3.4 3.6
April-93 3.7 2.4 1.2 -0.1 1.5 3.2 2.9
May-93 3.8 3.3 2.0 1.5 2.2 3.0 2.4
June-93 3.5 2.7 1.2 1.7 2.9 1.4 3.5
July-93 2.5 1.9 2.4 2.2 2.3 1.3 2.1
August-93 1.7 2.6 1.3 2.0 2.2 1.5 1.0
September-93 3.2 3.8 2.8 1.4 2.9 2.9 2.5
October-93 1.0 2.0 3.3 0.6 2.2 2.3 1.9
November-93 1.0 2.1 3.0 0.9 2.3 -0.3 -0.3
December-93 1.0 2.4 2.6 2.9 2.1 -0.2 0.1
January-94 -0.9 1.3 1.8 0.0 0.0 -1.2 -1.8
February-94 -1.9 -0.1 1.8 -1.3 -0.7 -1.9 -2.6
March-94 -1.8 0.2 1.9 -1.7 -0.8 -0.3 -1.3
April-94 -1.3 -0.6 -1.4 -2.7 -1.6 -0.1 -1.7
May-94 0.1 0.0 2.7 -1.5 0.3 1.7 -0.3
June-94 0.7 -0.4 2.6 -2.9 2.4 1.5 0.3
July-94 0.1 -1.8 2.2 -3.8 1.7 0.6 0.2
August-94 -2.0 -3.0 0.2 -3.7 -0.7 -1.5 -2.4
September-94 -2.5 -2.3 1.8 -3.6 -0.3 -1.9 -2.5
October-94 -1.6 -1.5 1.8 -2.8 -0.4 0.9 1.2
November-94 0.8 -1.4 1.9 -3.0 2.0 1.6 1.4
December-94 2.3 0.9 0.0 0.8 2.1 3.1 3.3
January-95 1.7 -0.8 -0.6 -0.9 -0.7 2.0 1.6
February-95 -0.1 -1.6 -0.7 -1.9 -0.9 2.3 1.3
March-95 1.8 1.1 0.6 0.0 0.9 3.1 2.2
April-95 2.9 1.5 -0.1 -0.7 1.9 3.2 2.6
May-95 3.6 2.6 0.8 -0.4 3.2 3.4 2.4
June-95 1.6 -1.5 3.2 -2.3 2.5 -1.4 -1.5
July-95 3.8 2.7 3.9 2.9 1.2 2.7 2.9
August-95 3.0 3.5 3.4 3.7 3.5 3.5 3.5
September-95 3.4 3.8 3.1 1.6 2.8 2.7 3.3
October-95 3.2 3.3 3.8 1.4 3.6 2.1 1.4
November-95 3.0 2.5 3.3 2.6 2.7 0.6 0.1
December-95 -2.8 2.3 2.9 1.7 0.8 -3.7 -3.2
January-96 -2.3 1.7 2.9 -0.7 -0.5 -3.5 -2.7
February-96 0.8 2.4 3.5 2.8 2.5 -2.4 -1.9
March-96 1.7 1.9 3.8 2.7 2.4 -1.7 -1.7
April-96 2.8 2.2 3.6 3.4 2.2 -1.2 -1.9
May-96 1.7 1.1 3.3 1.8 1.9 -2.2 -2.0
June-96 2.8 3.3 3.0 2.8 3.5 -0.1 0.2
July-96 0.9 1.8 3.2 1.0 2.8 -2.8 -2.8
August-96 -0.6 -0.9 2.6 1.0 0.8 -2.5 -2.6
September-96 -0.7 -0.1 2.8 -1.4 -0.5 -2.2 -3.5
October-96 0.5 2.0 3.9 0.2 0.6 -1.6 -1.3
November-96 1.7 1.9 3.0 0.3 1.6 0.0 1.8
December-96 2.9 2.6 1.5 3.4 1.6 3.1 3.2
January-97 3.7 3.3 2.6 3.1 2.9 2.0 2.3
February-97 3.8 3.3 3.0 3.9 3.3 3.1 3.4
March-97 3.9 3.5 3.2 3.8 3.3 3.5 3.5
April-97 3.6 2.7 3.0 3.2 2.6 2.9 2.9
May-97 3.3 3.3 3.2 3.3 3.2 2.8 2.6
June-97 2.8 3.2 2.6 3.3 2.5 2.1 2.6
July-97 3.6 2.9 3.7 2.9 3.6 2.3 2.5
August-97 2.3 1.6 2.5 2.1 2.0 2.3 2.6
September-97 2.9 3.3 4.0 3.8 2.9 2.6 3.7
October-97 2.7 3.7 3.9 4.2 2.3 3.6 3.8
November-97 2.8 3.8 3.9 3.8 2.5 3.7 3.2
December-97 1.2 1.8 2.0 -0.6 2.6 0.1 -0.7
January-98 -0.4 0.1 3.0 -2.9 0.8 -0.9 -0.3
February-98 -0.3 -0.1 2.3 -2.0 0.2 -1.0 -1.7
March-98 -0.8 -0.3 2.1 -2.2 -0.8 -0.8 -1.5
April-98 1.2 -0.5 2.1 -2.4 1.1 0.5 -0.5
May-98 2.0 0.1 2.2 -1.6 0.1 1.7 0.1
June-98 0.6 1.1 3.2 2.2 -0.7 0.5 0.9
July-98 -1.0 -1.6 2.5 1.0 0.1 -1.0 -0.7
August-98 0.5 0.9 3.0 2.4 1.1 -0.3 1.1
September-98 -1.4 3.2 3.4 2.7 1.3 -0.1 0.1
October-98 0.9 1.7 2.9 1.8 0.4 0.4 -0.4
November-98 0.5 1.9 3.2 2.8 1.8 1.2 0.5
December-98 1.1 0.2 -2.2 -1.8 0.4 3.0 2.8
January-99 -0.9 -0.6 1.0 -3.4 -1.1 1.5 -0.9
February-99 0.3 -0.4 1.6 -2.4 0.6 0.9 0.4
March-99 -0.2 0.0 1.7 -0.1 0.2 0.5 0.0
April-99 -1.2 -0.7 0.9 -2.1 -1.1 -1.6 -1.6
May-99 1.1 1.0 2.4 -0.3 1.1 1.2 0.4
June-99 0.7 -0.6 3.7 -0.6 0.7 0.3 0.4
July-99 1.6 1.2 3.5 0.8 2.5 1.9 1.5
August-99 1.9 1.5 3.0 0.4 2.0 2.5 2.8
September-99 1.9 2.9 3.8 1.6 3.2 3.3 3.5
October-99 1.8 2.8 3.6 1.0 2.5 2.4 3.7
November-99 1.5 2.6 3.5 0.0 2.1 2.0 0.8
December-99 -3.7 -3.1 0.8 -3.5 -2.7 -3.7 -3.3
January-00 -3.3 -2.1 0.9 -2.5 -2.6 -3.7 -3.3
February-00 -2.3 -1.1 1.1 -0.6 -1.1 -3.5 -2.9
March-00 -1.8 -0.9 1.6 -0.7 -1.2 -2.7 -2.5
April-00 -0.3 -0.3 2.0 -0.6 -0.3 -1.4 -1.4
May-00 1.1 1.0 2.4 -0.3 1.1 1.2 0.4
June-00 1.0 -0.2 1.3 1.1 2.2 -1.9 0.2
July-00 -1.4 -0.9 1.5 -2.6 0.9 -3.1 -1.7
August-00 -1.7 -2.2 1.6 -2.8 0.2 -3.4 -3.2
September-00 -2.2 -0.6 1.9 -2.2 0.2 -2.3 -2.7
October-00 -2.0 0.8 2.5 0.8 0.1 -2.4 -1.6
November-00 -1.7 -0.3 -1.4 -1.0 0.4 -1.0 -0.6
December-00 -1.8 -1.8 -1.7 -1.4 -1.8 1.4 .5
January-01 -1.3 -0.5 -0.8 0.5 -1.0 1.0 -0.6
February-01 -1.8 -2.3 -0.9 -2.0 -1.5 0.8 -0.6
March-01 -1.6 -2.2 -1.0 -2.5 -1.6 1.3 1.7
April-01 -1.6 -1.8 -0.2 -3.0 -2.0 1.4 -0.3
May-01 -1.5 -1.7 0.1 -2.8 -1.6 0.9 -0.2
June-01 0.9 -0.9 2.3 -0.9 2.7 3.0 2.8
July-01 -1.4 -3.0 0.6 -3.3 0.1 -1.6 -1.0
August-01 -1.2 -2.7 1.6 -2.2 0.3 0.1 -0.7
September-01 -1.7 -0.6 0.9 -1.4 0.2 0.5 1.3
October-01 -2.5 -0.9 1.5 -2.3 -0.1 -0.5 -1.1
November-01 -2.2 -1.3 0.4 -1.7 -0.5 -1.9 -2.6
December-01 -1.2 -1.8 -2.4 -1.8 -2.0 -2.8 -1.1
January-02 -1.5 -2.2 -1.6 -2.5 -2.0 -2.1 -1.6
February-02 -2.3 -2.6 -1.9 -2.8 -2.2 -2.7 -2.6
March-02 -2.7 -2.8 -2.0 -3.2 -2.5 -3.1 -3.1
April-02 -2.8 -2.6 -1.9 -3.5 -2.8 -3.1 -3.5
May-02 -3.1 -3.0 -2.5 -3.9 -2.9 -3.6 -3.7
June-02 -2.5 -3.7 -1.5 -4.0 -1.5 -3.7 -4.1
July-02 -3.9 -4.1 -3.2 -4.1 -1.7 -3.9 -4.1
August-02 -3.5 -3.8 -2.9 -3.6 -1.4 -3.8 -4.1
September-02 -3.8 -3.8 -3.2 -3.8 -1.9 -3.6 -4.1
October-02 -2.9 -3.4 -2.6 -3.0 -1.0 -3.2 -2.2
November-02 -2.8 -3.5 -2.2 -3.2 -2.5 -2.9 -1.2
December-02 0.8 1.0 -2.4 0.9 1.1 -0.5 0.5
January-03 0.0 -0.1 -2.7 -0.8 -0.7 -0.8 -0.7
February-03 -1.9 -1.8 -3.0 -2.1 -2.0 -2.0 -2.3
March-03 -1.4 -1.0 -2.6 -1.8 -2.3 -1.0 -1.4
April-03 -0.5 0.7 -1.4 -1.5 -0.4 -1.1 -1.8
May-03 -1.7 0.4 -0.6 -1.3 -1.8 -3.2 -3.0
June-03 -0.4 -1.5 -0.9 0.8 -2.0 -2.3 -1.3
July-03 -2.4 -1.6 0.4 0.0 -0.9 -3.4 -2.6
August-03 -2.7 -2.2 -0.3 -2.0 -1.8 -3.5 -3.6
September-03 -3.1 -1.4 0.4 -3.0 -2.2 -3.2 -2.2
October-03 -2.4 1.0 1.2 -1.3 -0.8 0.8 2.3
November-03 -3.4 0.1 -0.3 -3.2 -1.8 -2.0 -1.7
December-03 -1.2 -1.1 -2.2 2.5 -2.0 0.8 0.5
January-04 -0.2 -1.1 -0.8 0.9 -1.8 0.4 0.6
February-04 -0.8 -2.1 -1.4 -1.3 -1.9 0.4 0.2
March-04 -0.3 -2.2 -1.2 -1.7 -2.0 1.0 1.1
April-04 -1.6 -2.6 -1.7 -3.3 -3.3 -0.9 -0.5
May-04 0.5 -2.1 0.5 -3.1 -2.1 0.8 0.8
June-04 0.0 -1.8 -0.2 -3.2 -2.4 0.8 0.7
July-04 -2.2 -3.0 -0.6 -3.3 -2.2 -1.4 -1.4
August-04 -1.8 -2.9 0.9 -2.3 -1.7 -2.1 -1.8
September-04 -3.3 -3.0 1.1 -3.4 -2.2 -3.0 -2.9
October-04 -1.9 -0.7 1.6 -1.1 -1.6 1.3 +1.9
November-04 -1.0 0.7 1.5 0.7 -0.8 0.1 1.5
December-04 2.4 0.5 -0.3 -0.2 0.4 1.3 1.8
January-05 1.7 0.2 0.6 -1.2 -0.3 1.3 0.8
February-05 1.7 -1.2 0.6 -1.1 -0.3 2.2 1.9
March-05 2.6 -0.9 -0.4 -2.2 -0.3 3.1 2.9
April-05 2.6 -0.4 -0.3 -2.2 -1.3 3.2 2.3
May-05 2.7 -0.1 -0.2 -2.3 -1.4 2.7 1.5
June-05 0.8 -0.4 1.9 -0.2 -1.6 3.1 3.2
July-05 0.1 -0.1 1.8 0.9 -1.3 1.8 1.6
August-05 -0.1 0.5 0.9 0.0 -1.5 0.9 1.7
September-05 -1.1 0.1 2.5 -0.4 -1.0 -0.7 0.8
October-05 -1.3 1.6 1.8 -1.8 -1.5 -0.1 0.0
November-05 0.1 1.6 2.9 0.5 0.6 3.3 3.6
December-05 -1.8 2.7 1.0 0.1 2.3 -2.9 -1.7
January-06 2.0 3.6 1.9 3.5 3.3 -2.7 -1.7
February-06 1.2 2.5 1.7 2.5 2.9 -2.5 -1.9
March-06 0.1 2.1 1.3 0.9 1.6 -2.8 -2.3
April-06 0.7 1.6 0.5 0.8 0.5 -1.5 -1.3
May-06 -0.3 0.6 -0.1 0.7 -0.9 -1.7 -1.7
June-06 1.8 1.7 0.8 3.1 0.1 -0.4 -0.1
July-06 0.0 -1.4 -0.5 -1.3 -1.6 -0.8 -2.7
August-06 0.6 -1.1 1.4 -0.6 -1.5 -1.8 -1.9
Septermber-06 -0.9 0.0 0.8 -0.7 -0.3 0.7 1.0
October-06 -0.8 1.3 1.3 0.3 0.4 2.1 1.6
November-06 2.2 1.4 1.5 3.4 2.2 3.8 3.9
December-06 1.6 2.6 0.0 2.9 2.4 0.3 0.7
January-07 0.5 2.3 1.1 0.4 1.4 0.3 0.2
February-07 -1.1 0.6 0.9 -1.9 0.0 0.8 -0.3
March-07 -0.9 0.4 0.9 -1.3 -0.7 0.5 -0.2
April-07 -1.5 0.0 1.2 -2.8 -1.6 -0.2 -1.0
May-07 -1.1 -0.1 1.1 -3.0 -0.8 1.0 -1.0
June-07 0.7 0.0 2.4 -1.7 2.3 1.5 1.3
July-07 -0.5 -1.0 1.3 -3.7 0.6 0.5 -0.4
August-07 -0.3 -1.0 1.4 -0.1 -2.9 -0.1 -0.3
September-07 -1.2 -0.1 2.2 -2.5 1.4 1.2 2.8
October-07 -0.7 2.2 2.0 -1.2 0.7 1.8 2.5

November-07

0.1 1.9 1.8 1.4 0.7 2.4 2.4

December-07

-2.6 -1.7 -1.4 -3.3 -2.5 -2.6 -2.1

January-08

2.4 2.1 0.1 -0.1 2.4 2.8 2.4

February-08

3.3 2.3 0.5 0.5 3.0 3.5 3.4

March-08

3.9 2.9 0.2 0.6 3.3 3.7 3.9
April-08 3.6 2.7 1.1 0.2 3.1 3.1 3.0
May-08 3.0 2.3 0.7 0.1 2.7 2.4 1.4
June-08 2.4 2.3 1.0 1.2 1.3 0.8 1.6
July-08 1.8 2.0 0.9 2.1 1.8 1.6 1.6
August-08 2.8 2.5 0.8 1.8 1.4 1.0 1.6
September-08 1.6 1.9 3.1 0.3 0.4 0.0 0.0
October-08 -1.5 2.0 3.0 3.0 -0.5 0.2 0.1
November-08 -2.2 1.0 2.2 -0.4 -0.4 0.1 -1.2
December-08 -2.6 -1.6 -1.1 -1.5 -1.1 -2.0 -1.8

January-09

1.7 1.3 0.2 0.6 1.7 2.6 2.2

February-09

0.8 0.7 0.3 0.9 1.6 2.2 1.4
March-09 0.8 0.1 0.8 -0.1 0.9 1.7 1.0
April-09 0.4 -0.1 0.2 -0.8 0.4 1.1 0.1

May-09

0.2 0.2 1.4 -1.3 -0.4 1.1 -0.1
June-09 1.3 3.2 2.5 2.7 1.6 3.1 3.2
July-09 1.1 1.5 3.4 0.1 1.6 -0.9 -1.2
August-09 0.4 1.7 3.0 0.9 0.8 -0.9 -1.2
September-09 -2.6 0.7 2.5 -2.4 -1.4 -1.9 -2.9
October-09 -1.8 1.2 3.2 -2.1 -0.7 -1.4 -2.5
November-09 -1.3 1.4 3.2 0.3 0.6 -0.6 -2.5

December-09

-1.9 -2.0 1.3 -2.2 0.0 -1.8 -2.6

January-10

-0.4 -1.2 1.6 -2.1 -0.1 0.6 -0.5

February-10

-0.7 -2.1 1.3 -2.6 -0.9 1.5 0.3

March-10

-0.8 -1.8 1.2 -3.2 -1.1 1.6 0.3

April-10

-0.3 -2.1 1.1 -3.5 -1.1 1.8 0.1

May-10

-0.8 -1.5 1.8 -2.4 -1.5 1.5 -0.8
June-10 -0.4 -0.8 3.1 -2.0 -0.2 1.0 0.6
July-10 0.5 1.8 3.5 0.3 1.7 -1.5 -1.0
August-10 -1.1 -0.7 2.6 -0.6 -1.1 -2.1 -2.6
September-10 -1.3 0.6 3.0 0.4 0.2 -0.7 1.1
October-10 -2.3 -0.2 2.3 -1.7 -1.3 0.5 -1.3
November-10 -1.8 0.0 2.8 -0.8 0.1 -0.4 -1.1
December-10 0.1 2.6 2.0 3.9 0.3 -1.8 -1.4

January-11

3.6 2.8 2.5 3.7 1.3 1.7 2.9

February-11

2.3 2.3 2.9 2.8 0.9 0.4 0.1

March-11

2.5 2.6 3.0 2.6 0.9 0.4 0.0

April-11

2.5 3.3 3.0 3.1 1.0 -0.1 -0.5

May-11

3.5 4.0 3.0 4.1 1.7 0.8 0.5
June-11 1.4 1.5 2.0 0.5 -1.4 -3.0 -1.7
July-11 2.3 3.1 2.6 3.2 1.2 0.4 1.5
August-11 3.0 2.4 3.5 4.1 2.2 -0.4 1.8
September-11 1.3 3.4 2.9 3.2 -0.5 -0.3 -1.2
October-11 0.0 2.8 3.5 3.0 -0.4 -1.1 -1.3
November-11 0.5 2.7 3.3 3.5 0.2 1.3 0.0
December-11 -1.0 0.5 1.5 1.0 -0.2 0.4 -0.6
               
Lowest Value
of Record
-3.9 -4.1 -3.2 -4.1 -3.3 -3.9 -4.1
Date(s) of 
Lowest Value
7/02 7/02 7/02, 9/02 7/02 4/04 7/02 6/02, 7/02,
 8/02, 9/02
Highest Value
of Record
3.9 4.0 4.0 4.2 4.1 4.1 4.0
Date(s) of
Highest Value
1/84, 3/97
3/08
9/83,1/84,
9/84, 11/84,
5/11
11/84
9/97
10/97 1/84 1/84 1/84
Basin Gunnison Colorado South Platte

Yampa, White
 & N. Platte

Arkansas Rio Grande

San Juan,
 Animas,
 Dolores,
 & San Miguel