A return to normal temperatures means high water.

We knew it was just a matter of time that it would warm up and the melting of snow would begin. With over 80 inches of snow in Great Falls this winter, there is plenty of snow yet to melt and it is already causing problems for some areas.

 

NWS Weather Story

North and eastern Montana has seen plenty of snow as well and their temperatures are warming up. Jensen Dam in central Petroleum county failed closing Valentine Road and water running over Dovetail Road. Ice jamming and melting is the culprit. Water levels will continue to drop as the water drains from the reservoir behind the dam.  A flash flood warning for that area has expired but expect high water levels.

 

Cascade county also is under a Small Stream Flood Advisory that includes Great Falls and Cascade.

1255 PM MDT TUE MAR 15 2011

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SMALL STREAM FLOOD ADVISORY FOR MELTING SNOW IN...
  CASCADE COUNTY IN CENTRAL MONTANA...
  THIS INCLUDES THE CITIES OF...GREAT FALLS...CASCADE...

* UNTIL 1245 PM MDT WEDNESDAY.

* AT 1246 PM MDT...CONTINUED SNOWMELT ACROSS CASCADE COUNTY WAS
  KEEPING CREEK AND STREAM LEVELS RUNNING HIGH...OR EVEN OVERFLOWING
  THEIR BANKS IN SPOTS. ALTHOUGH THE VAUGHN FRONTAGE ROAD IS
  OPEN...WATER CONTINUES TO RUN OVER THE ROAD BETWEEN MILE MARKERS
  1.5 AND 1.7 WHERE A SPEED RESTRICTION IS IN EFFECT. ALSO...THERE
  IS LOW LAND FLOODING IN THE GIBSON FLATS AREA SOUTH OF GREAT
  FALLS. CONDITIONS WILL BE MONITORED AND UPDATES PROVIDED AS
  NECESSARY.

A FLOOD ADVISORY MEANS RIVER OR STREAM FLOWS ARE ELEVATED OR PONDING
OF WATER IN URBAN OR OTHER AREAS IS OCCURRING OR IS IMMINENT.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.
----------------------------------------------------
FLOOD WARNING

 NATIONAL WEATHER SERVICE GREAT FALLS MT
 157 PM MDT TUE MAR 15 2011
 
 THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS EXTENDED THE
 
 * FLOOD WARNING FOR SMALL STREAMS IN...
   PONDERA COUNTY IN NORTH CENTRAL MONTANA...
   TETON COUNTY IN NORTH CENTRAL MONTANA
 
 * UNTIL 445 PM MDT WEDNESDAY
 
 * AT 200 PM MDT TUESDAY...NUMEROUS ROAD CLOSURES REMAIN ACROSS 
 PONDERA COUNTY AS A RESULT OF SNOW MELT. THESE INCLUDE A PORTION OF 
 IOWA LOOP AND MIDWAY ROAD...FROM HEALY SPRINGS ROAD TO BLAZEN ROAD. 
 MULTIPLE AREAS OF SMALL STREAM FLOODING IN CENTRAL AND EASTERN 
 PORTIONS IN TETON COUNTY CONTINUE AS WELL. AS SNOWMELT CONTINUES TO 
 ADD WATER TO CREEKS...CONDITIONS WILL BE MONITORED AND UPDATES 
 PROVIDED AS NECESSARY.
 
 A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
 STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
 HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
 IMMEDIATELY.
 
 PRECAUTIONARY/PREPAREDNESS ACTIONS...
 
 DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
 ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
 SAFELY. MOVE TO HIGHER GROUND.
 
 TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
 YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

-----------------------------------------------------------

NATIONAL WEATHER SERVICE GREAT FALLS MT
420 AM MDT TUE MAR 15 2011

CHOUTEAU COUNTY MT-
420 AM MDT TUE MAR 15 2011

...THE FLOOD WARNING REMAINS IN EFFECT UNTIL 200 PM MDT WEDNESDAY FOR
SMALL STREAMS IN CHOUTEAU COUNTY...

* CHOUTEAU COUNTY DISASTER AND EMERGENCY SERVICES REPORTED THAT
  WATER IS FLOWING OR COVERING MANY ROADWAYS ACROSS PORTIONS OF THE
  COUNTY. ROADS CLOSED DUE TO FLOODING ARE BRADY ROAD EAST...AND
  FROM DENT BRIDGE TO BEAVER SLIDE AND RUSSELL ROAD. OTHER AREAS
  AFFECTED ARE RUDYARD ROAD NEAR BLACK COULEE ROAD.

A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.
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