STORM SUMMARY NUMBER 3 FOR MAJOR CENTRAL U.S. STORM WITH FLOODING
RAIN AND HEAVY SNOW
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM CDT SAT APR 29 2017

...MAJOR SPRING STORM TO PRODUCE FLOODING RAINS FROM OKLAHOMA TO
OHIO AND MORE THAN A FOOT OF SNOW IN THE ROCKIES AND SOUTHERN HIGH
PLAINS...

WINTER STORM WARNINGS ARE IN EFFECT FOR THE EASTERN PLAINS OF
COLORADO AND NORTHEAST NEW MEXICO...AS WELL AS FAR WESTERN
KANSAS...THE OKLAHOMA PANHANDLE...AND NORTHWEST TEXAS PANHANDLE.

WINTER STORM WARNINGS AND ADVISORIES ARE IN EFFECT IN THE
MOUNTAINS OF SOUTHERN WYOMING...CENTRAL COLORADO...AND NORTHEAST
NEW MEXICO.

FLASH FLOOD WATCHES ARE IN EFFECT FOR EASTERN OKLAHOMA NORTHWARD
TO SOUTHERN INDIANA...SOUTHWESTERN MICHIGAN...SOUTHWESTERN
OHIO...AND NORTHERN KENTUCKY. THESE REGIONS ALSO HAVE POCKETS OF
FLOOD WARNINGS AND ADVISORIES.

WINTER STORM WATCHES ARE IN EFFECT FOR MUCH OF THE TEXAS
PANHANDLE...BEAVER COUNTY OKLAHOMA...AND PARTS OF WESTERN KANSAS
AND SOUTHERN NEBRASKA.

FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 300 AM CDT...A SURFACE LOW WITH A CENTRAL PRESSURE OF 994
MB...29.35 INCHES...WAS LOCATED IN CENTRAL TEXAS. LOW PRESSURE WAS
EXPANDING ALONG TWO LENGTHY FRONTAL BOUNDARIES THAT STRETCHED FROM
SOUTHERN NEW MEXICO OUT THROUGH THE SOUTHERN PLAINS STATES AND
INTO THE OHIO VALLEY. A LARGE AND STRONG HIGH PRESSURE SYSTEM WAS
LOCATED OVER THE WESTERN ATLANTIC...HELPING TO PRODUCE SOUTHERLY
WINDS OVER THE GULF COAST REGION...WHICH WAS DRAWING MOIST AND
UNSTABLE AIR RAPIDLY NORTHWARD INTO THE DEVELOPING STORM SYSTEM
OVER THE MIDDLE OF THE NATION. NATIONAL WEATHER SERVICE DOPPLER
RADARS AND SURFACE OBSERVATIONS REVEALED MODERATE RAIN MOVING INTO
WEST VIRGINIA AND CLUSTERS OF STRONGER THUNDERSTORMS MOVING INTO
NORTHWEST WEST VIRGINIA. MODERATE RAIN WAS FALLING IN SOUTHWEST
KANSAS AND THE OKLAHOMA PANHANDLE AND LIGHT TO MODERATE SNOW WAS
FALLING FROM WYOMING TO CENTRAL COLORADO. 

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 1200 PM CDT FRI
APR 28 THROUGH 300 AM CDT SAT APR 29...

...COLORADO...
EVERGREEN 1 N                         9.5                    
BERGEN PARK 1 SSE                     7.0                    
AURORA 5 SE                           5.0                    
AIR FORCE ACADEMY 4 ENE               2.8                    
GREELEY 3 W                           2.0                    
WESTCLIFFE 5 W                        2.0                    
DIVIDE                                1.5                    

...MONTANA...
FISHTAIL 18 SW                       17.0                    
RED LODGE 1 S                        12.5                    
RED LODGE 5 N                         5.0                    

...NEBRASKA...
LISCO                                 3.5                    
STAPLETON 5 W                         2.4                    
OSHKOSH 10 NE                         1.0                    

...SOUTH DAKOTA...
PRINGLE                               7.0                    
CUSTER 5 ENE                          6.0                    
ORAL                                  5.0                    
HILL CITY                             3.0                    

...WYOMING...
ALTA 6 ENE                           29.0                    
JACKSON HOLE RENDEZVOUS              21.0                    
CODY 18 SW                           20.0                    
YELLOWSTONE SOUTH ENTRANCE 8 W       19.0                    
ATLANTIC CITY                        14.5                    
GILLETTE 5 SSW                       13.0                    
MOOSE                                11.0                    
LANDER 7 SE                          10.0                    
RIVERTON                              6.9                    
CASPER 6 W                            2.3                    
GLENROCK                              1.0                    

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 1200 PM CDT FRI
APR 28 THROUGH 300 AM CDT SAT APR 29...

...ILLINOIS...
RIDGWAY                               3.50                    

...INDIANA...
BLOOMINGTON                           1.05                    

...OHIO...
GOSHEN                                1.26                    


A LARGE AND INTENSE STORM SYSTEM DEVELOPING OVER THE MIDDLE OF THE
NATION WILL PRODUCE HEAVY SNOW IN THE SOUTHERN ROCKIES AND
ADJACENT HIGH PLAINS...AND A WIDESPREAD HEAVY RAIN EVENT
DOWNSTREAM ACROSS MUCH OF THE CENTRAL UNITED STATES FROM FRIDAY
NIGHT THROUGH SUNDAY. SNOW ACCUMULATIONS OF 6 TO 12 INCHES OR
MORE...ARE EXPECTED IN THE MOUNTAINS...BUT ALSO AWAY FROM THE
MOUNTAINS AS FAR EAST AS KANSAS AND THE OKLAHOMA AND TEXAS
PANHANDLES. HEAVY SNOW ON LEAFED OUT TREES MAY MEAN POWER OUTAGES.
GUSTY WINDS WILL PRODUCE VERY LOW VISIBILITY. THIS SAME EVENT WILL
BRING FLASH FLOODING...RIVER FLOODING...AND SEVERE WEATHER TO
PORTIONS OF THE SOUTHERN PLAINS...MIDDLE AND LOWER MISSISSIPPI
VALLEYS...AND EASTWARD INTO PORTIONS OF THE OHIO AND TENNESSEE
VALLEYS. THE INITIAL FOCUS OF HEAVIER CONVECTIVE RAINS IS EXPECTED
ALONG THE STATIONARY FRONTAL BOUNDARY THAT WILL SET UP FROM
OKLAHOMA EAST-NORTHEASTWARD INTO THE OHIO VALLEY BEGINNING FRIDAY
NIGHT. STORMS WILL GRADUALLY INCREASE AND EXPAND BOTH NORTHWARD
INTO THE GREAT LAKES AND SOUTHWARD INTO MORE OF THE SOUTHERN
PLAINS ON SATURDAY AND SUNDAY. THIS SLOW MOVING STORM WILL BRING
COPIOUS AMOUNTS OF RAIN...WIDESPREAD 3 TO 6 INCHES...AND ISOLATED
AMOUNTS OVER 8 INCHES. DANGEROUS FLOODING IS EXPECTED...INCLUDING
SOME AREAS THAT DO NOT USUALLY FLOOD. THE OZARKS AND AREAS
BORDERING THE OZARKS IN MISSOURI AND ARKANSAS ARE AT A
PARTICULARLY HIGH RISK FROM FLOODING. PLEASE STAY NEAR A SOURCE OF
WEATHER INFORMATION AND HEED WARNINGS. 

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE WEATHER PREDICTION
CENTER AT 1000 AM CDT. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.

ZIEGENFELDER