STORM SUMMARY NUMBER 1 FOR CENTRAL ROCKIES/GREAT PLAINS STORM 
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD  
400 PM CDT SAT MAY 5 2007  
  
...LATE SEASON WINTER STORM AFFECTING PARTS OF THE CENTRAL ROCKIES
WHILE SEVERE THUNDERSTORMS AND HEAVY RAIN IMPACT PARTS OF THE
PLAINS STATES...

WINTER STORMS WARNINGS ARE IN EFFECT FOR PORTIONS OF
WYOMING...WESTERN COLORADO AND NORTHEASTERN UTAH.

HEAVY SNOW WARNINGS ARE IN EFFECT FOR PORTIONS OF SOUTH CENTRAL
MONTANA AND NORTHEASTERN UTAH.

SNOW ADVISORIES ARE IN EFFECT FOR PORTIONS OF UTAH...WYOMING AND
WESTERN COLORADO.

SNOW AND BLOWING SNOW ADVISORIES ARE IN EFFECT FOR PORTIONS OF
CENTRAL COLORADO.

FLOOD AND FLASH FLOOD WARNINGS ARE IN EFFECT FOR PORTIONS OF SOUTH
CENTRAL NEBRASKA...EASTERN NORTH DAKOTA...EASTERN SOUTH DAKOTA AND
WESTERN MINNESOTA.

FLOOD WATCHES ARE IN EFFECT FOR PORTIONS OF SOUTHEASTERN NORTH
DAKOTA...EASTERN SOUTH DAKOTA AND WESTERN MINNESOTA.

AT 300 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED
SCATTERED PRECIPITATION ASSOCIATED WITH THIS STORM EXTENDING FROM
THE SOUTHWEST NORTHWARD INTO THE NORTHERN ROCKIES AND EASTWARD
INTO THE CENTRAL AND NORTHERN PLAINS. SNOW HAS BEEN FALLING IN
PARTS OF WYOMING AND NORTHERN UTAH WITH RAIN ELSEWHERE.
THUNDERSTORMS HAVE BEEN OBSERVED IN THE CENTRAL PLAINS.


...SELECTED RAINFALL TOTALS IN INCHES AS OF 4 PM CDT...

...SOUTH DAKOTA...

WEBSTER SCHOOL                      3.65
HURON ARPT                          3.22
WESSINGTON SPRINGS                  2.03              
WHITE LAKE                          2.09
SIOUX FALLS 5SE                     1.91
ABERDEEN                            1.25


...SELECTED SNOWFALL TOTALS IN INCHES AS OF 4 PM CDT...

...WYOMING...

HOBBS PARK                         19.6
MARQUETTE                          19.2
KIRWIN                             16.8
ST LAWRENCE ALT                    16.7
LITTLE WARM                        14.8
COLD SPRINGS                       14.2
TOWNSEND CREEK                     14.0

...COLORADO...

OURAY                               2.0
VALLECITO DAM                       2.0

...UTAH...

ALTA COLLINS                        9.0
SNOWBIRD                            8.5
GOTHIC                              4.5
BRIGHTON CREST                      4.0
PAGOSA SPRINGS 12NW                 2.0


AT 330 PM CDT...A 990 MILLIBAR LOW PRESSURE CENTER CURRENTLY
LOCATED OVER NORTHWESTERN KANSAS IS FORECASTED TO MOVE NORTHWARD
WHILE SLIGHTLY WEAKENING OVER THE NEXT 24 HOURS. AREAS OF
PRECIPITATION WILL CONTINUE TO EXPAND BOTH NORTHWARD AND EASTWARD
WITH MANY AREAS EXPECTED TO RECEIVE MODERATE TO HEAVY AMOUNTS OF
RAINFALL. 2 TO 4 INCHES OF RAINFALL CAN BE EXPECTED FOR PARTS OF
NEBRASKA...KANSAS...OKLAHOMA...IOWA...AND MISSOURI. IN ADDITION TO
THE RAINFALL THREAT...A SIGNIFICANT SEVERE WEATHER OUTBREAK IS
ANTICIPATED OVER THE GREAT PLAINS...ESPECIALLY OVER CENTRAL KANSAS
AND CENTRAL NEBRASKA...WITH SOME TORNADOES EXPECTED DURING THE
REST OF THE AFTERNOON AND TONIGHT.

FARTHER WEST...THE MAIN THREAT WILL BE MODERATE AMOUNTS OF
SNOWFALL OVER THE NORTHERN AND CENTRAL ROCKY MOUNTAINS. 4 TO 8
INCHES ARE ANTICIPATED THROUGH SUNDAY WITH ISOLATED AREAS
RECEIVING 12 INCHES. AS THE STORM SYSTEM PUSHES NORTHWARD...HEAVY
SNOWFALL WILL DIMINISH AS A SIGNIFICANT WEATHER THREAT.

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE HYDROMETEOROLOGICAL
PREDICTION AT 10 PM CDT. PLEASE REFER TO YOUR LOCAL NATIONAL
WEATHER SERVICE FORECAST OFFICE FOR ADDITIONAL INFORMATION ON THIS
EVENT.

TRIMARCO/RUBIN-OSTER