Expires:200902111911;;904612
FGUS83 KFSD 101911
RVSFSD
HYDROLOGIC STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
111 PM CST TUE FEB 10 2009
...SNOWMELT RUNOFF AND ICE COULD CAUSE MINOR FLOOD PROBLEMS
   THROUGH WEDNESDAY...
THE WARM TEMPERATURES OF THE PAST SEVERAL DAYS...COMBINED WITH THE
ONE-TENTH TO ONE-THIRD INCH OF RAINFALL ON MONDAY...HAS CAUSED THE
PRE-EXISTING SNOW PACK ACROSS PARTS OF NORTHWEST IOWA TO RAPIDLY
MELT AND RUNOFF INTO THE RIVERS. LOCALIZED ICE JAMS HAVE ALSO
CONTRIBUTED TO HIGHER STAGES IN SOME AREAS.
THE SNOW PACK IN THESE AREAS CONTAINED 1 TO 3 INCHES OF WATER 
PRIOR TO THE MELT...AND NEARLY ALL OF THIS WATER HAS MADE IT INTO 
THE RIVERS IN THE PAST 2 TO 3 DAYS. WATER LEVELS ON PARTS OF THE 
ROCK...FLOYD...AND OCHEYEDAN RIVERS HAVE INCREASED TO LEVELS JUST
BELOW FLOOD STAGE.
WITH COLDER TEMPERATURES MOVING BACK INTO THE REGION WEDNESDAY 
THROUGH THIS WEEKEND...THE RUNOFF WILL BE REDUCED OR STOPPED
WITH FREEZING TEMPERATURES. ICE JAM EFFECTS ARE ALSO LEADING
TO ADDITIONAL FLUCTUATIONS OF THE WATER LEVELS...BUT THIS
SHOULD ALSO BE STOPPING OVER THE NEXT 24 HOURS.
MINOR LOWLAND FLOODING IS POSSIBLE...ESPECIALLY IN THE VICINITY
OF ICE JAMS THROUGH TUESDAY NIGHT AND WEDNESDAY MORNING.
CONDITIONS SHOULD IMPROVE THROUGH THE LATTER PART OF THE WEEK.
ADDITIONAL INFORMATION IS AVAILABLE AT 
 
HTTP://WWW.CRH.NOAA.GOV/AHPS2/INDEX.PHP?WFO=FSD
STAY TUNED FOR FURTHER UPDATES BY LISTENING TO NOAA WEATHER RADIO...
OR YOUR LOCAL RADIO AND TV STATIONS.

IAC041-141-111911-
111 PM CST TUE FEB 10 2009
...FOR THE OCHEYEDAN RIVER NEAR SPENCER... 
* THE STAGE AT 1 PM TUESDAY WAS 6.2 FEET. 
* FLOOD STAGE IS 8.0 FEET.
* LOCAL RUNOFF AND ANY ICE JAMS COULD CAUSE MINOR LOWLAND
  FLOODING THROUGH WEDNESDAY MORNING.
$$
&& 
LOCATION FLOOD  LATEST OBSERVED  
         STAGE  STAGE  TIME      
ROCK RIVER
RAPI4    13.0   12.65 TUE 1 PM   
FLOYD RIVER
SHLI4    12.0   10.45 TUE 11 AM  
ALTI4    12.0    6.07 TUE 12 PM   
OCHEYEDAN RIVER
SPOI4     8.0    6.22 TUE 1 PM