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| Storm Reports |
| Are you interested in what happened during a recent event? Check out the report below. |
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Isaac in Arkansas (August 30-31, 2012)/Pg1 |
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Hurricane Isaac made landfall along the Louisiana Gulf Coast during the evening of August 28th.
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| In the picture: Hurricane Isaac was just off the coast of Louisiana at 425 pm CDT on 08/28/2012. |
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A little more than 20 inches of rain fell at New Orleans, Louisiana. Some neighborhoods were inundated by floodwater, and hundreds of people either evacuated or had to be rescued.
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| In the picture: Ninety six hour rainfall through 700 am CDT on 09/01/2012. |
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A couple of days later, the remnants of Isaac were in Arkansas. From a headline standpoint, and given what happened to the south, it was no surprise that the big story locally with this tropical system was flooding. More on this later.
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| In the picture: Discharge along the Mississippi River at Belle Chasse, Louisiana (near New Orleans) was actually negative for a time on 08/28/2012, indicating storm surge from Isaac and an upstream flow. |
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| In the picture: A spaghetti plot of potential Isaac tracks as of 700 am CDT on 08/29/2012. The plot was comprised of numerous forecast model guesses. Note that "Model Eastern Edge" and "Model Western Edge" lines do not diverge greatly away from Isaac. This indicated general model agreement with time and more confidence in the track of the system as it moved inland. The "Model Best Fit" line was the most likely track based on the data. |
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Models had difficulty determining where Isaac would go, but they finally came into agreement with a track through western sections of the state. That helped forecasters decide what the impacts would be locally.
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| In the picture: A building ridge of high pressure ("H") to the east of Arkansas has been forcing the remnants of Hurricane Isaac ("L") to the west. |
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As the system arrived during the afternoon and evening of the 30th, barometric pressure dropped markedly. The lowest pressures measured were at El Dorado (Union County) and Camden (Ouachita County), with 29.46 inches (997.6 millibars) and 29.51 inches (999.3 millibars) respectively. As pressures dropped, east to northeast winds increased and became gusty. Some gusts exceeded 40 mph. Pine Bluff (Jefferson County) had a gust to 46 mph, with 44 mph at Little Rock (Pulaski County) and 43 mph at Hot Springs (Garland County) and Mount Ida (Montgomery County).
Higher gusts downed some trees/tree limbs, and there were power outages reported. The tree damage was partly due to existing drought conditions and a lack of ground water. Many trees were in a weakened state. This made them more susceptible to gusty conditions.
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| In the picture: Forty eight hour rainfall through 700 am CDT on 09/01/2012. |
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Much of the region was east of the center of Isaac. This is typically where the heaviest rain occurs. On the 30th/31st, three to more than six inches fell from northeast into central and southeast Arkansas. White Hall (Jefferson County) received a whopping 10.70 inches of rain, with 8.88 inches at Providence (White County), 8.39 inches at Pine Bluff (Jefferson County), 8.25 inches at Steprock (White County), 8.20 inches at Augusta (Woodruff County) and 8.11 inches at Fordyce (Dallas County).
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| Forty Eight Hour Rainfall (through 700 am CDT on 09/01/2012) |
| Site |
Amount (Inches) |
| White Hall (Jefferson Co) |
10.70 |
| Providence (White Co) |
8.88 |
| Pine Bluff (Jefferson Co) |
8.39 |
| Steprock (White Co) |
8.25 |
| Augusta (Woodruff Co) |
8.20 |
| Fordyce (Dallas Co) |
8.11 |
| Carlisle (Lonoke Co) |
7.09 |
| Searcy (White Co) |
6.39 |
| Stuttgart (Arkansas Co) |
6.11 |
| Georgetown (White Co) |
6.06 |
| Star City (Lincoln Co) |
5.82 |
| Des Arc (Prairie Co) |
5.26 |
| Rohwer (Desha Co) |
4.99 |
| Cabot (Lonoke Co) |
4.79 |
| Kelso (Desha Co) |
4.74 |
| Felsenthal Lock and Dam (Union Co) |
4.57 |
| Some of the heaviest rain fell during the morning of the 31st. By that time, the system was in northwest sections of the state. The system headed into southwest Missouri during the afternoon and evening. |
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| In the picture: The WSR-88D (Doppler Weather Radar) showed rain swirling around the remnants of Hurricane Isaac in northwest Arkansas at 808 am CDT on 08/31/2012. |
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| There is more concerning Isaac on August 30th and 31st. To check out the rest of the story, click here. |
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