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Here Comes Beta/Heavy Rain on September 21-24, 2020
 
The satellite showed clouds surrounding tropical system Beta ("L") building over Arkansas and then starting to dissipate from the northwest in the ninety six hour period ending at 1000 am CDT 09/24/2020.
Satellite at 1000 am CDT (09/20)  |  Satellite at 1000 am CDT (09/21)
Satellite at 1000 am CDT (09/22)  |  Satellite at 1000 am CDT (09/23)
Satellite at 1000 am CDT (09/24)  |  Loop
In the pictures: The satellite showed clouds surrounding tropical system Beta ("L") building over Arkansas and then starting to dissipate from the northwest in the ninety six hour period ending at 1000 am CDT 09/24/2020.
 

Tropical Storm Beta, the twenty third named storm in the Atlantic basin this tropical season, wobbled ashore near Port O'Connor, TX late on September 21st. The system promised to spread rain into Arkansas as it turned to the northeast.

 

In the video: The WSR-88D (Doppler Weather Radar) showed a band of showers and thunderstorms persisting for hours over the south side of Houston, TX on 09/22/2020.
 

Rainbands surrounding Beta unleashed a lot of water on the south side of Houston, TX. Six more than twelve inch amounts were noted, and this caused widespread flooding in communities such as Pearland, TX. Rising water engulfed some homes, and at least 100 people were rescued.

 

Seventy two hour rainfall as of 700 am CDT on 09/24/2020 (shown in twenty four hour increments).
24 Hour Rain (09/22)  |  24 Hour Rain (09/23)
24 Hour Rain (09/24)
In the pictures: Seventy two hour rainfall as of 700 am CDT on 09/24/2020 (shown in twenty four hour increments).
 

By the morning of the 22nd, downpours reached parts of southwest Arkansas. As of 700 am CDT, Lewisville (Lafayette County) had 5.15 inches of rain, with 3.28 inches at Ashdown (Little River County) and 2.52 inches at Texarkana (Miller County).

In the next twenty four hours, heavy precipitation affected the southern half of the state. Four to five inch totals occurred at Kelso (Desha County), Nashville (Howard County), and Portland (Ashley County), with three to four inches at Malvern (Hot Spring County), Mount Ida (Montgomery County), and Murfreesboro (Pike County).

The deluge continued across the southeast counties on the 23rd/early on the 24th. Five to six inches of liquid was measured at Eudora (Chicot County) and Watson (Desha County). Roads were flooded at Dermott (Chicot County), and this stalled a vehicle along Highway 35. Streets were also under water at Hamburg (Ashley County) and McGehee (Desha County).

 

Beta was the ninth tropical system in the Atlantic basin to make landfall in the United States during the 2020 tropical season.
In the picture: Beta was the ninth tropical system in the Atlantic basin to make landfall in the United States during the 2020 tropical season.
 

Across the north, some places received less than a quarter of an inch of precipitation for the entire event. This included Flippin (Marion County), Harrison (Boone County), and Mountain Home (Baxter County).

For the month (through the 24th), it was very wet in central and southern Arkansas and very dry in the northwest. Rainfall was more than two inches above average at El Dorado (Union County), Fort Smith (Sebastian County), Pine Bluff (Jefferson County), and Texarkana (Miller County), and below average by over two inches at Fayetteville (Washington County).

 

Precipitation in September, 2020 (Through the 24th)
Site Amount Normal +/- % of Normal
Fayetteville (NW AR) 1.74 3.79 -2.05 46%
Harrison (NC AR) 2.64 3.39 -0.75 78%
Jonesboro (NE AR) 3.94 2.32 +1.62 170%
Fort Smith (WC AR) 6.96 3.20 +3.76 218%
Little Rock (C AR) 3.08 2.46 +0.62 125%
West Memphis (EC AR) 2.00 2.09 -0.09 96%
Texarkana (SW AR) 5.62 2.71 +2.91 207%
El Dorado (SC AR) 7.71 2.40 +5.31 321%
Pine Bluff (SE AR) 4.35 1.96 +2.39 222%

 

Prior to the arrival of Beta, rivers across the region were generally in good shape. The Cache River was elevated, but was on the way down. As Beta departed, minor flooding was expected along a rising Ouachita River.

 

High temperatures across Arkansas were in the 60s to lower 70s on 09/23/2020.
In the picture: High temperatures across Arkansas were in the 60s to lower 70s on 09/23/2020.
 

Clouds and rain held temperatures well below normal. Readings on the 23rd were only in the 60s to lower 70s. The mercury was under 65 degrees at Clinton (Van Buren County), Jonesboro (Craighead County), Little Rock (Pulaski County), Newport (Jackson County), Searcy (White County), Stuttgart (Arkansas County), and West Memphis (Crittenden County).

 

In the table: The mercury topped out at 61 degrees at the North Little Rock Airport (Pulaski County) on 09/23/2020. This was a top 10 coldest September high temperature locally.
 

Daily coldest high temperature records were set at several sites, including Batesville (Independence County), Hot Springs (Garland County), Little Rock (Pulaski County), North Little Rock (Pulaski County), and Russellville (Pope County).

 

Storm Reports
Preliminary reports of heavy rain and flash flooding in the Little Rock County Warning Area on September 23, 2020 (in red).
Submit a storm report.
There were isolated reports of heavy rain and flash flooding in southeast Arkansas on September 23rd. For a look at the reports, click here.
 
Link of Interest
Plot Reports
In the picture: Preliminary reports of heavy rain and flash flooding in the Little Rock County Warning Area on September 23, 2020 (in red).