Storm Summary Number 1 for Southern Plains and Lower Mississippi
Valley Heavy Rain
NWS Weather Prediction Center College Park MD
400 PM CST Thu Jun 10 2021

...Convective complex continues moving southward with
back-building convection across the Lower Mississippi Valley
bringing additional heavy rain and continued risk of flash
flooding...

Flash Flood Warnings remain in effect for portions of southeastern
Arkansas, extreme northeastern Louisiana, and northwestern
Mississippi.

Flood Warnings remain in effect for portions of eastern Arkansas,
northern Mississippi, and along areal rivers including the
Mississippi and Sabine Rivers near the Gulf Coast.

Flash Flood Watches remain in effect for portions of Lower
Mississippi Valley including southeastern Arkansas, northeastern
Louisiana, northern Mississippi, and west-central Alabama.

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

At 300 PM CST...National Weather Service Doppler Radar detected a
small mesoscale convective complex moving southward over
west-central Mississippi. Radar presentation indicates the complex
appears to be weakening some as an associated outflow boundary
pushes southward ahead of the system. Meanwhile, convection
continues to back-build over southeastern Arkansas along a surface
boundary draped over the eastern half of the state.  Another area
of training storms was located along a confluent zone from
southwestern Alabama southwest into southern Mississippi. The
region remains under the influence of a mid-level low located to
the northeast over the Ohio Valley as well as a surface high to
the southeast over the Gulf of Mexico, with a central pressure of
1018 mb, or 30.06 inches of mercury, funneling rich Gulf moisture
northward.

...Selected preliminary Storm Total Rainfall in inches from 700 AM
CST Tue Jun 06 through 300 PM CST Fri Feb 12...

...ALABAMA...
MONTICELLO MUNI ARPT                 8.34                    
TUSCALOOSA MUNI ARPT                 4.25                    

...ARKANSAS...
ROHWER 2 NNE                        19.22                    
LANDMARK 2.1 SW                      7.65                    
PINE BLUFF 3.9 NNE                   7.23                    
UNIONTOWN 2.1 ESE                    5.58                    
LITTLE ROCK ADAMS FIELD              5.12                    

...LOUISIANA...
CLINTON 0.8 SE                       4.28                    

...MISSISSIPPI...
CHARLESTON 4 SW                     15.35                    
GREENWOOD LEFLORE ARPT              11.33                    
TUPELO                               8.67                    
TUPELO RGNL ARPT                     8.58                    
SHELBY 2 SW                          7.20                    
VALLEY HILL 2 WSW                    5.94                    
MERIDIAN                             4.08                    
BLUFF LAKE 1 WSW                     4.06                    

...TENNESSEE...
MEMPHIS                              2.84                    

...Selected preliminary Storm Total Rainfall in inches where the
event has ended...

...OKLAHOMA...
COUNCIL HILL                        13.40                    
OKMULGEE                            13.10                    
BROKEN BOW 7.4 NE                    8.30                    
GRAY 2 NNE                           8.23                    
GUTHRIE 5.8 W                        5.29                    


The flow of rich, deep Gulf moisture will maintain instability
over the region at least through tonight. Of particular concern
will be further development and back-building of convection over
southeastern Arkansas, northeastern Louisiana, and western
Mississippi along the surface boundary and confluent flow. A
Moderate Risk for excessive rainfall is in place through Friday
morning for portions of southeastern Arkansas, northeastern
Louisiana, west-central Mississippi, and far west-central Alabama.
There is a Slight Risk for excessive rainfall that expands on the
Moderate Risk area to include more of southeastern Arkansas,
northern Mississippi, and northern Alabama. Areas within the
Moderate Risk may see an additional 3-5 inches of rain, with
rainfall rates of 1-2 inches per hour. Given the significant
flooding already ongoing and saturated soils across the region,
any additional rainfall will continue to pose a risk for
additional flooding.



Putnam