Monthly Storm Reports and Storm Data
Storm Reports
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Heavy Rain/Cool on September 14-17, 2012
 
The pattern at 100 pm CDT on 09/15/2012, with high precipitable water values ahead of a storm system ("L") in west Texas. A wet pattern set up in mid-September. A slow moving storm system in Texas interacted with a stalled front across Arkansas to create an unsettled atmosphere and areas of rain. Abundant moisture increased the likelihood of heavy precipitation.
In the picture: The pattern at 100 pm CDT on 09/15/2012, with high precipitable water values ahead of a storm system ("L") in west Texas. Precipitable water, or water vapor contained in a vertical column of at atmosphere, is normally between 1.00" and 1.25" in mid-September.

 

On the 14th, there were heavy downpours in the Little Rock (Pulaski County) area. One gauge in the Heights district recorded 2.76 inches of rain between 500 and 600 pm CDT. At Maumelle (Pulaski County), an inch of rain fell in 15 minutes. 

The WSR-88D (Doppler Weather Radar) showed an axis of heavy rain setting up in downtown Little Rock (Pulaski County) and areas to the northwest between 410 pm and 448 pm CDT on 09/14/2012.
In the picture: The WSR-88D (Doppler Weather Radar) showed an axis of heavy rain setting up in downtown Little Rock (Pulaski County) and areas to the northwest between 410 pm and 448 pm CDT on 09/14/2012.

 

Twenty four hour rainfall through 700 am CDT on 09/15/2012.

By the time precipitation ended, there were some three to five inch amounts locally, especially northwest of the downtown area.

In the picture: Twenty four hour rainfall through 700 am CDT on 09/15/2012.

 

Flooding was spotty, and mostly the result of poor drainage or water collecting in low spots. Even so, water covered the intersection of Fair Park and Markham in the city, and traffic was snarled. At Oak Grove (Pulaski County), ditches overflowed onto Highway 365. Water made it into a local restaurant which had to close temporarily.

 

Elsewhere, twenty four hour amounts through 700 am CDT on the 15th included 4.59 inches at Ozark Lock and Dam (Franklin County), 4.59 inches at Lake Maumelle (Pulaski County), 3.32 inches at Nimrod Dam (Perry County), 2.75 inches at Coal Hill (Johnson County) and 2.63 inches at Hot Springs (Garland County).

Twenty four hour rainfall through 700 am CDT on 09/15/2012.
In the picture: Twenty four hour rainfall through 700 am CDT on 09/15/2012.

 

Temperatures at 300 pm CDT on 09/15/2012.

Clouds and mostly light rain on the 15th kept temperatures down. Afternoon readings were generally in the 60s and 70s (10 to 15 degrees cooler than normal).

In the picture: Temperatures at 300 pm CDT on 09/15/2012.

 

The WSR-88D (Doppler Weather Radar) showed rain building into Arkansas from the southwest ahead of a storm system ("L") in central Texas at 928 pm CDT on 09/16/2012.
In the picture: The WSR-88D (Doppler Weather Radar) showed rain building into Arkansas from the southwest ahead of a storm system ("L") in central Texas at 928 pm CDT on 09/16/2012.
On the 17th, rain gradually ended from the west ahead of cold front barreling through the upper Midwest and central Plains.
In the picture: On the 17th, rain gradually ended from the west ahead of cold front barreling through the upper Midwest and central Plains.
 

Rain and cool conditions continued on the 16th as the system in Texas inched toward Louisiana. The system gained some momentum to the east on the 17th as a new cold front approached from the northwest. Precipitation began tapering off late in the day.

 

As precipitation totals added up, yearly deficits and an existing drought were slowly erased. For the first time since May, rainfall for 2012 was less than two inches below normal at Little Rock (Pulaski County).

Seventy eight hour rainfall through 100 pm CDT on 09/17/2012.
In the picture: Seventy eight hour rainfall through 100 pm CDT on 09/17/2012.

 

Departure From Normal Precipitation at Little Rock (Pulaski County) in 2012
Date Amount
Jan 31 -1.49
Feb 29 -0.62
Mar 31 +2.75
Apr 30 +0.45
May 31 -3.19
Jun 30 -5.94
Jul 31 -7.75
Aug 31 -4.62
Sep 17 -1.19
Note: The largest deficit was -8.19 inches on August 7th. From that time through September 17th, 10.76 inches of rain fell (7.00 inches above normal).

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