Heavy rains brought flooding to the Black, White, and Cache Rivers in mid March 2021.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LZK wrote it up.
Heavy rains brought flooding to the Black, White, and Cache Rivers in mid March 2021.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Little Rock, AR wrote its last area forecast discussion before the first event at Mar 13, 2:54 PM CST, 1 hour 9 minutes earlier.
Area Forecast Discussion National Weather Service Little Rock AR 254 PM CST Sat Mar 13 2021 .SHORT TERM...Tonight Through Monday Stalled frontal boundary currently is over southeast into west central Arkansas. As a trough emanating from the upper low currently over the Rockies pushes toward the region tonight, the flow will become more amplified, with the frontal boundary beginning to move back northward. Similar to what happened last night/this morning, expect areas of fog near and to the north of the warm front. Also, temperatures north of the warm front will not change much through the night. During the day Sunday, surface low will occlude out in the Plains and push a cold front across Arkansas, with showers/storms becoming likely ahead of it. There could be a few strong storms, primarily over central and eastern Arkansas during the afternoon and evening hours. This, however, will all depend on how much things destabilize out ahead of the front. With thick cloud cover expected ahead of the boundary, surface-based instability, or lack thereof, will be a limiting factor. However, if any strong storms were to occur, they would be capable of producing damaging wind gusts. With the high amount of wind shear in the low and mid levels, if any strong storms got going, they could easily rotate, so there will be an isolated tornado threat as well. Greatest opportunity for any strong storms would be during the late afternoon and early evening. Though we're not expecting widespread heavy rainfall, a localized flash flood threat would be enhanced by any training storms. Not only that, areas of northern Arkansas that have already seen several inches of rain in the last 36-48 hours would be the primary area of concern for any localized flash flooding. Pressure gradient around the front will be fairly tight, with increased winds around the front. Have upped the winds and gusts for Sunday/Sunday Evening slightly, but at this time, looks like things should stay below advisory criteria. Frontal boundary will move east by late Sunday Night, with precip coming to an end. However, the boundary won't get far, stalling just outside of Arkansas as it hits nearly parallel upper flow. Not expecting any significant cooldowns behind the front, as the surface flow remains westerly, and the occluded surface low moves through the mid Mississippi and into the Ohio Valley. && .LONG TERM...Monday Night Through Saturday Dry weather expected at the start of the long term portion of the forecast as much of the area will find itself in the wake of the H500 low that is expected to have lingered far too long. This feature will have lifted to the north and become dissolved in the mean flow. Zonal to swrly flow aloft will remain in place and a stalled sfc boundary will be located SE of the state. The break in active weather won't last long however, as the mid- level flow reloads with a fresh low working its way from the Four Corners area toward the Great Lakes. Beneath the H500 low, a sfc low will develop near the TX/OK panhandles region and take a similar path eastward, likely remaining just north of the state. With a cold front trailing to the southwest and a warm front extending out ahead of the low, a decent warm sector is set to approach the area. Unlike recent systems, instability may be adequate this go around. As the mid-level and sfc lows approach the area and remain just northwest of the state, rain and thunderstorms are expected to develop on Wednesday. Timing differences remain and this will have major impacts on the area of greatest concern with regards to severe weather potential. Beyond this, W-NW flow aloft will set up over the state. With sfc ridging building in, below average temperatures are expected from late week into next weekend. While winds look to remain in place, temps into next weekend may cause concern for frost/freeze potential in some areas. && .PRELIMINARY POINT TEMPS/POPS... Batesville AR 52 69 48 74 / 20 80 100 0 Camden AR 61 76 48 79 / 10 80 70 0 Harrison AR 52 63 44 68 / 30 90 70 0 Hot Springs AR 59 70 46 73 / 10 90 60 0 Little Rock AR 57 73 47 75 / 10 80 90 0 Monticello AR 59 76 52 78 / 10 50 90 0 Mount Ida AR 59 70 44 73 / 10 90 40 0 Mountain Home AR 51 63 45 70 / 30 90 90 0 Newport AR 54 71 50 72 / 20 60 100 0 Pine Bluff AR 59 74 49 75 / 10 70 90 0 Russellville AR 56 69 44 73 / 20 90 70 0 Searcy AR 54 73 47 75 / 20 80 100 0 Stuttgart AR 59 74 50 75 / 10 60 100 0 && .LZK Watches/Warnings/Advisories...NONE. && Short Term...57 / Long Term...67
Hazardous Weather Outlook National Weather Service Little Rock AR 348 AM CST Sat Mar 13 2021 ARZ003>008-012>017-021>025-030>034-037>047-052>057-062>069-141100- Boone-Marion-Baxter-Fulton-Sharp-Randolph-Newton-Searcy-Stone- Izard-Independence-Lawrence-Johnson-Pope-Van Buren-Cleburne- Jackson-Logan-Conway-Faulkner-White-Woodruff-Scott-Yell-Perry- Polk-Montgomery-Garland-Saline-Pulaski-Lonoke-Prairie-Monroe-Pike- Clark-Hot Spring-Grant-Jefferson-Arkansas-Dallas-Cleveland- Lincoln-Desha-Ouachita-Calhoun-Bradley-Drew- 348 AM CST Sat Mar 13 2021 This Hazardous Weather Outlook is for a Large Part of Arkansas. .DAY ONE...Today and Tonight Showers and a few thunderstorms will remain possible this morning across the northern half of the state. Some locally heavy rainfall could be seen along the Missouri-Arkansas border...with an increased threat for isolated flash flooding. After a break in the precipitation activity this afternoon and early evening...chances for showers and a few thunderstorms will return to the forecast late tonight. .DAYS TWO THROUGH SEVEN...Sunday Through Friday Showers and thunderstorms will become likely for Sunday into Sunday night as a cold front moves east over the state. A few strong to severe thunderstorms will be possible Sunday afternoon and evening...generally over the southeast third of the area. Damaging winds will be the primary threat with the strongest storms...with a threat for tornadoes also possible in this same region of the state. Expect the threat for severe weather to decrease by late Sunday night and especially Monday morning as the storm system exits the state to the east. A strong system will affect the area late Tuesday into Wednesday...bringing with it another round of rain and storms. While uncertainty is high...there is some potential for severe weather on Wednesday. Please monitor forecast updates over the coming days. .Spotter Information Statement... Spotter activation may be needed Sunday afternoon and evening. && Visit NWS Little Rock on the web. Go to http://weather.gov/lzk. 62/68
The national radar mosaic for the moment the first event began.
5 flood. Local standard time, as filed.
Heavy rains brought flash flooding to the Black River at Black Rock mid March through the end of the month.
Heavy rains brought flooding to the White River at Augusta mid March through the end of the month.
Heavy rains brought flooding the Black River at Pocahontas mid March through the end of the month.
Heavy rains brought flooding to the Cache River at Patterson mid March through the end of the month.
Heavy rains brought flooding to the White River at Clarendon mid March through the end of the month.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arkansas in 2021Every state in 2021This day in weather historyWarnings in Arkansas, March 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 950068, 950070, 950069, 950072, 950071.