PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
1000 AM MDT MON AUG 11 2006

DROUGHT CONDITIONS CONTINUE ACROSS WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING

DROUGHT CONDITIONS IMPROVED SLIGHTLY OVER THE LAST 45 DAYS. HOWEVER, AS OF SEPTEMBER 18th, EXTREME DROUGHT CONDITIONS CONTINUE ACROSS MOST OF WESTERN SOUTH DAKOTA AND THE PLAINS OF NORTHEASTERN WYOMING. SEVERE DROUGHT CONDITIONS PERSIST OVER THE CENTRAL AND SOUTHERN BLACK HILLS AND TRIPP COUNTY IN SOUTH DAKOTA. ABNORMALLY DRY CONDITIONS WERE FOUND IN THE NORTHERN BLACK HILLS AND IN THE BEAR LODGE MOUNTAINS.

TEMPERATURES IN AUGUST WERE 1 TO 2 DEGREES ABOVE NORMAL ACROSS NORTHEAST WYOMING AND WESTERN SOUTH DAKOTA. PRECIPITATION DURING AUGUST WAS ABOVE NORMAL. MOST LOCATIONS RECEIVED 100 TO 150 PERCENT OF THEIR NORMAL PRECIPITATION FOR THE MONTH.

RESERVOIR DATA

RESERVOIRS AROUND THE REGION REMAIN WELL BELOW CAPACITY. THE TABLE BELOW SHOWS RESERVOIR PERCENT OF NORMAL CAPACITY AND CHANGE IN ELEVATION OVER THE PAST 30 DAYS AS CALCULATED BY THE BUREAU OF RECLAMATION.

RESERVOIR       PERCENT OF NORMAL   ELEVATION CHANGE
....................................................................................................................
ANGOSTURA               36%                                         -0.2 FT
BELLE FOURCHE      12%                                         -7.5 FT
DEERFIELD                 77%                                         -0.4 FT
KEYHOLE                     29%                                         -1.0 FT
PACTOLA                      58%                                          2.0 FT
SHADEHILL                  68%                                        -0.7 FT

SUMMER 2006 TEMPERATURES

THE SUMMER OF 2006 WAS A WARM ONE WITH AVERAGE TEMPERATURES ACROSS NORTHEASTERN WYOMING AND WESTERN SOUTH DAKOTA 3 TO 4 DEGREES ABOVE NORMAL. JUNE WAS 3.5 DEGREES ABOVE NORMAL, JULY WAS 6 DEGREES ABOVE NORMAL AND AUGUST WAS 1.5 DEGREES ABOVE NORMAL.

AT THE RAPID CITY REGIONAL AIRPORT THE AVERAGE TEMPERATURE FOR THE SUMMER WAS 74.2 DEGREES, WHICH IS 5.1 DEGREES ABOVE NORMAL. THIS TIED FOR THE SECOND WARMEST SUMMER ON RECORD. THE RECORD IS 74.7 DEGREES IN 1988.

AT THE RAPID CITY REGIONAL AIRPORT THE TEMPERATURE TOPPED 100 DEGREES 15 TIMES, WHICH IS THE SECOND MOST EVER. THE RECORD IS 16 TIMES IN 1988. RECORD HIGH TEMPERATURES WERE SET EIGHT TIMES IN THE SUMMER WITH SIX OCCURRING IN JULY. THE RECORD HIGH OF 111 DEGREES ON JULY 15TH WAS THE WARMEST TEMPERATURE EVER RECORDED AT THE RAPID CITY REGIONAL AIRPORT.

AT THE RAPID CITY WEATHER SERVICE OFFICE IN RAPID CITY THE AVERAGE TEMPERATURE FOR THE SUMMER WAS 73.3 DEGREES...WHICH IS 4.7 DEGREES ABOVE NORMAL. THIS TIED FOR THE FOURTH WARMEST SUMMER ON RECORD. THE RECORD IS 76.1 DEGREES IN 1936.

AT THE RAPID CITY WEATHER SERVICE OFFICE THE TEMPERATURE TOPPED 100 DEGREES SEVEN TIMES, WHICH TIES 1937 FOR THE FOURTH MOST EVER. THE RECORD IS 18 TIMES IN 1936. THE SEVEN 100 DEGREE DAYS IN JULY, TIED 1931 FOR THE SECOND MOST EVER IN JULY. THE RECORD NUMBER OF 100 DEGREE DAYS IN JULY IS 13 DAYS SET IN 1936. RECORD HIGH TEMPERATURES WERE SET SIX TIMES IN THE SUMMER WITH FIVE OCCURRING IN JULY. THE RECORD HIGH OF 106 DEGREES ON JULY 15TH WAS THE SECOND WARMEST TEMPERATURE EVER RECORDED IN RAPID CITY. THE RECORD IS 107 DEGREES ON JULY 12 1954.

SUMMER 2006 PRECIPITATION

DURING THE SUMMER OF 2006, PRECIPITATION WAS BELOW NORMAL BY 2 TO 3 INCHES IN MOST LOCATIONS. THE WET SPOTS FOR RAINFALL WERE IN FAITH AND 14 MILES SOUTH OF MISSION WHERE PRECIPITATION AMOUNTS WERE NEAR NORMAL. THE DRY SPOTS FOR SOUTH DAKOTA WERE LOCATED IN MEADE AND BUTTE COUNTIES WHERE RAINFALL WAS 25 TO 40 PERCENT OF NORMAL. COLONY AND GILLETTE WERE THE DRY AREAS IN NORTHEAST WYOMING REPORTING 20 TO 30 PERCENT OF NORMAL.

AT THE RAPID CITY REGIONAL AIRPORT, 3.46 INCHES OF RAIN FELL THIS SUMMER. THIS IS 3.05 INCHES BELOW THE NORMAL OF 6.51 INCHES. IT WAS THE EIGHTH DRIEST SUMMER ON RECORD. THE DRIEST SUMMER WAS 1994 WHEN ONLY 2.23 INCHES OF RAIN FELL.

AT THE RAPID CITY WEATHER SERVICE OFFICE IN RAPID CITY, 6.15 INCHES OF RAIN FELL THIS SUMMER. THIS IS 0.32 INCHES ABOVE THE NORMAL OF 5.83 INCHES.

OUTLOOK FOR SEPTEMBER THROUGH FEBRUARY

DROUGHT CONDITIONS ARE EXPECTED TO CONTINUE ACROSS WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING THROUGH FEBRUARY. IF NORMAL OR ABOVE NORMAL RAINFALL OCCURS DURING THIS PERIOD SOME IMPROVEMENT IN DROUGHT CONDITIONS CAN BE EXPECTED.

ACCORDING TO THE NATIONAL CLIMATIC DATA CENTER, RAINFALL FROM AUGUST THROUGH FEBRUARY TO ALLEVIATE THE DROUGHT WILL HAVE TO BE 200 TO 225 PERCENT OF NORMAL ACROSS NORTHEASTERN WYOMING, 175 TO 200 PERCENT OF NORMAL ACROSS SOUTH CENTRAL SOUTH DAKOTA AND 150 TO 175 PERCENT ACROSS THE REST WESTERN SOUTH DAKOTA. THE NATIONAL CLIMATIC DATA CENTER IS CURRENTLY FORECASTING LESS THAN A 10 PERCENT CHANCE OF THIS OCCURRING.

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