Thunderstorms developed near a frontal boundary during the early morning hours of the 9th, as the low level jet increased across the region. These thunderstorms produced locally heavy rainfall and moved repeatedly over the same areas, which resulted in flash flooding across portions of west central Arkansas.
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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 TSA wrote it up.
Thunderstorms developed near a frontal boundary during the early morning hours of the 9th, as the low level jet increased across the region. These thunderstorms produced locally heavy rainfall and moved repeatedly over the same areas, which resulted in flash flooding across portions of west central Arkansas.
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 Tulsa, OK wrote its last area forecast discussion before the first event at Aug 8, 10:42 PM CST, 3 hours 13 minutes earlier.
Area Forecast Discussion National Weather Service Tulsa OK 1142 PM CDT Thu Aug 8 2019 .AVIATION... CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG. Flying conditions are all over the place at the current time with conditions ranging from IFR to VFR across the region. Conditions will continue to be varied across the region into Friday morning as showers and thunderstorms become more widespread across the region. Conditions will become consistently VFR across the area as we move into Friday evening. && .PREV DISCUSSION... /Issued 854 PM CDT Thu Aug 8 2019/ ..UPDATE... DISCUSSION... Currently monitoring a band of strong convection stretching from northwest AR into southeast OK. This activity has developed near a ribbon of MUCAPEs around 1000-3000 J/KG and along the old outflow boundary that remains quasi-stationary along the I-40 corridor. Some gusty winds and pockets of heavy rainfall will be likely with this activity over the next several hours. Recent HRRR/RAP output suggests that additional convection will develop overnight as the low-level southwesterly jet impinges on the existing surface boundary. This activity may initially develop across parts of northern OK, then expand in coverage and stream southeast overnight into northeast OK and possibly northwest AR. With PWATs pooled around 2+ inches, should see some areas of locally heavy rainfall into Friday morning. Highest rainfall totals look to set-up a little farther south/southwest than previously thought, so have expanded the flash flood watch accordingly. && .TSA WATCHES/WARNINGS/ADVISORIES... OK...Flash Flood Watch until 10 AM CDT Friday for OKZ054>070. AR...Flash Flood Watch until 10 AM CDT Friday for ARZ001-002-010-011. && AVIATION.....10
Hazardous Weather Outlook National Weather Service Tulsa OK 454 PM CDT Thu Aug 8 2019 ARZ001-002-010-011-019-020-029-OKZ049-053>076-091030- Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK- Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK- Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK- Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK- Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK- Washington OK-Washington AR- 454 PM CDT Thu Aug 8 2019 This Outlook is for Northwest and West Central Arkansas as well as much of Eastern Oklahoma. .DAY ONE...This Evening and Tonight. SEVERE THUNDERSTORM. RISK...Limited. AREA...Eastern Oklahoma and Northwest Arkansas. ONSET...This evening through tonight. FLASH FLOOD. RISK...Elevated. AREA...Northeast Oklahoma and Northwest Arkansas. ONSET...Tonight. HEAVY RAIN. RISK...Significant. AREA...Northeast Oklahoma and Northwest Arkansas. ONSET...Tonight. DANGEROUS HEAT. RISK...Significant. AREA...Mainly along and south of Interstate 40. ONSET...Ongoing. DISCUSSION... A weak surface boundary stretched west to east roughly along the Interstate 40 corridor late this afternoon. Showers and thunderstorms will remain possible near and mainly to the north of this boundary this evening and into the overnight hours. A few of the storms could become strong to marginally severe, although organized severe weather is not expected. Heavy rain producing thunderstorms training across the same areas will also raise flash flood concerns across parts of northeast Oklahoma and northwest Arkansas, mainly tonight. SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT... Local Spotter Activation May Be Needed. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. FRIDAY...Thunderstorm Potential...Dangerous Heat Potential...Heavy Rain Potential. SATURDAY and SUNDAY...Thunderstorm Potential...Dangerous Heat Potential. MONDAY...Dangerous Heat Potential. TUESDAY...Thunderstorm Potential...Dangerous Heat Potential. WEDNESDAY...Thunderstorm Potential. EXTENDED DISCUSSION... Showers and thunderstorms will remain possible into Saturday as the frontal boundary lingers in the vicinity. Another frontal boundary will move into the area next week, with thunderstorm chances increasing Tuesday and Wednesday as a result. To the south of the frontal boundaries, hot and humid conditions will continue, with afternoon heat index values nearing or exceeding 105 degrees each afternoon. weather.gov/tulsa contains additional information.
Special Weather Statement National Weather Service Tulsa OK 946 PM CDT Thu Aug 8 2019 OKZ065-066-090330- Okmulgee OK-Okfuskee OK- 946 PM CDT Thu Aug 8 2019 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN OKMULGEE AND EASTERN OKFUSKEE COUNTIES UNTIL 1030 PM CDT... At 945 PM CDT, a strong thunderstorm was located 5 miles north of Clearview, moving east at 5 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. Locations in or near the path include... Henryetta... Clearview... Pharoah... This includes Interstate 40 in Oklahoma between mile markers 221 and 236. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3536 9625 3553 9636 3562 9613 3541 9599 TIME...MOT...LOC 0245Z 250DEG 6KT 3547 9621
The Western Arkansas radar (KSRX), 56 km away, was scanning. The volume nearest the first event began at 07:54 UTC.
6 flash flood. Local standard time, as filed.
Numerous roads were flooded north of Ozark, including portions of Highway 23 and nearby county roads.
Portions of West Graphic Road were flooded south of Mountainburg. A vehicle was driven into the flood water, resulting in a swift water rescue.
Roads were flooded near the Chester Exit off I-49.
Multiple homes were flooded with up to fourteen inches of water.
Portions of Highway 282 were flooded and closed.
Ash Street bridge in Mountainburg was washed out by flood water.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arkansas in 2019Every state in 2019This day in weather historyWarnings in Arkansas, August 2019
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: 850071, 850078, 850082, 850086, 850090, 850095.