Rain showers and isolated thunderstorms developed on the back side of a deep low pressure system over Arkansas during the afternoon of the 28th. One of these thunderstorms produced a brief tornado in Osage County.
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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.
Rain showers and isolated thunderstorms developed on the back side of a deep low pressure system over Arkansas during the afternoon of the 28th. One of these thunderstorms produced a brief tornado in Osage County.
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 May 28, 2:05 PM CST, 3 hours 51 minutes earlier.
Area Forecast Discussion National Weather Service Tulsa OK 305 PM CDT Thu May 28 2020 .DISCUSSION... The upper level low pressure system that has plagued our area the past few days has shifted east into Arkansas this afternoon, and will weaken and accelerate east overnight. Scattered showers and isolated thunderstorms will continue into early this evening before waning. An upper ridge will build into the area from the west Friday into this weekend, with temperatures gradually warming. The upper ridge will remain parked over the area through much of next week, with dry weather continuing and temperatures warming to above normal levels. Stayed close to the National Blend of Models forecast. && .PRELIMINARY POINT TEMPS/POPS... TUL 58 80 57 81 / 20 0 0 0 FSM 60 82 57 83 / 20 0 0 0 MLC 59 81 55 82 / 20 0 0 0 BVO 55 79 53 81 / 20 0 0 0 FYV 56 77 51 79 / 50 0 0 0 BYV 58 77 52 78 / 50 0 0 0 MKO 59 79 55 80 / 20 0 0 0 MIO 57 77 53 79 / 50 0 0 0 F10 58 80 55 81 / 20 0 0 0 HHW 61 83 57 82 / 10 0 0 0 && .TSA WATCHES/WARNINGS/ADVISORIES... OK...None. AR...None. && SHORT TERM...21 LONG TERM....05
Hazardous Weather Outlook National Weather Service Tulsa OK 450 PM CDT Thu May 28 2020 ARZ001-002-010-011-019-020-029-OKZ049-053>076-291015- 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- 450 PM CDT Thu May 28 2020 This Outlook is for Northwest and West Central Arkansas as well as much of Eastern Oklahoma. .DAY ONE...Through Tonight. THUNDERSTORMS WITH DANGEROUS LIGHTNING. RISK...Limited. AREA...Eastern Oklahoma and Northwest Arkansas. ONSET...Ongoing. DISCUSSION... Scattered showers with a few isolated thunderstorms will continue across portions of eastern Oklahoma and northwest Arkansas through mid evening. Brief heavy rain and gusty winds will be possible in the stronger storms. SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT... Spotter Activation Not Expected. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. FRIDAY THROUGH WEDNESDAY...No Hazards. EXTENDED DISCUSSION... Clearing skies and near seasonal average temperatures are forecast Friday behind the departing low pressure system. A ridge of high pressure is expected to develop over the Southern Plains during the weekend and remain over the region through much of next week. This will allow for drier conditions and a warming trend with temperatures rising above seasonal average by the second half of next week. weather.gov/tulsa contains additional information.
The Tulsa radar (KINX), 63 km away, was scanning. The volume nearest the first event began at 23:56 UTC.
1 tornado. Local standard time, as filed.
A brief tornado damaged a mobile home, destroyed a carport, damaged an outbuilding, and snapped large tree limbs. Based on this damage, maximum estimated wind in the tornado was 70 to 80 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oklahoma in 2020Every state in 2020This day in weather historyThe tornado archive for Oklahoma, 2020Warnings in Oklahoma, May 2020
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: 891629.