Storm Summary Number 1 for Central U.S. Heavy Rain and Rockies Snow
NWS Weather Prediction Center College Park MD
400 AM CDT Tue May 21 2019

...Heavy rain and flash flooding are ongoing in the central U.S.,
as snow occurs in the Rockies...

Flash Flood and Flood Warnings, Watches, and Advisories are
widespread across the Southern and Central Plains and the Middle
Mississippi Valley.

Winter Storm Warnings and Winter Weather Advisories are in effect
for higher elevations of the Rockies and into parts of the Central
and Northern High Plains.

For a detailed graphical depiction of the latest watches, warnings
and advisories, please see www.weather.gov

At 300 AM CDT...A surface low pressure system with a central
pressure of 996 mb, or 29.41 inches of mercury, was located near
the Oklahoma/Texas border near Childress, Texas. A cold front
extended southward from this low through west central Texas, and
National Weather Service radars and surface observations indicated
that a squall line was located just ahead of this front. Another
front stretched from the low eastward across Oklahoma, northern
Arkansas, and eastward into the Tennessee Valley. Rain and
thunderstorms were also ongoing north of this front, impacting
Oklahoma and Kansas as well as Missouri, with another squall line
progressing into Illinois. Farther west, a deep upper-level trough
centered over the Rockies was helping cause temperatures that were
cold enough for snow in parts of the Rockies and into the Central
High Plains.

...Selected preliminary Storm Total Snowfall in inches from 700 AM
CDT Mon May 20 through 300 AM CDT Tue May 21...

...COLORADO...
GUANELLA PASS 5 WSW                  12.0                    
PALMER LAKE 2 S                      12.0                    
BLACK FOREST 3 NW                    11.5                    
ALMA 3 WNW                           11.0                    
PLACERVILLE 9 NE                     10.8                    
KIOWA                                 9.0                    
SILVERTON                             8.4                    
CASTLE ROCK 2 SE                      8.0                    
PETERSON AFB 4 NNW-COLORADO SPRINGS   4.0                    
DENVER 2 E                            1.9                    

...NEW MEXICO...
TERERRO 6 WNW                         7.0                    
TOADLENA 5 SSW                        7.0                    
ARROYO SECO 8 NE                      6.0                    
CANON PLAZA 11 NNW                    6.0                    
LLANO LARGO 5 SSE                     5.0                    
CUBA 9 E                              4.0                    

...WYOMING...
CHEYENNE 1 NW                         5.0                    

...Selected preliminary Storm Total Rainfall in inches from 700 AM
CDT Mon May 20 through 300 AM CDT Tue May 21...

...KANSAS...
CHANUTE-MARTIN JOHNSON ARPT           4.85                    
WINFIELD/ARKANSAS CITY - STROTHER     4.53                    
PARSONS - TRI-CITY ARPT               4.16                    
COFFEYVILLE MUNI ARPT                 3.40                    
WICHITA - EISENHOWER NATL ARPT        2.02                    

...MISSOURI...
JOPLIN RGNL ARPT                      4.41                    
MONETT                                2.98                    
SPRINGFIELD RGNL ARPT                 2.46                    

...OKLAHOMA...
SKIATOOK                              6.69                    
PAWNEE                                6.16                    
TALALA                                6.03                    
MARSHALL                              5.83                    
MIAMI                                 5.76                    
PONCA CITY MUNI ARPT                  5.44                    
EL RENO                               5.31                    
STILLWATER RGNL ARPT                  5.23                    
TULSA INTL ARPT                       3.22                    

...TEXAS...
ASPERMONT                             3.17                    
ROTAN                                 2.71                    
CROWELL                               2.64                    


The low pressure system is forecast to move northeastward on
Tuesday, and the cold front will move eastward with it, sweeping
out the moisture from the Southern Plains on Tuesday afternoon.
Through Tuesday morning, however, ongoing flooding and flash
flooding will continue as some locations particularly in Oklahoma
receive an additional 2 to 4 inches of rain over the already
saturated or flooded ground. A widespread 1 to locally 3 inches of
rain is forecast for much of the Mississippi Valley on Tuesday.
Thus, a Moderate Risk of excessive rainfall/flash flooding is in
place on Tuesday for eastern Oklahoma and Kansas, as well as
northwestern Arkansas and western Missouri. Severe weather is also
a threat. Meanwhile, snow of over a foot is forecast for higher
elevations of the Rockies, Bighorn Mountains, Wind River
Mountains/Tetons, and the Black Hills over the next couple of
days. Some snow could also spread into the Northern and Central
High Plains through Tuesday night.

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.

Tate