A complex of strong to severe thunderstorms developed over Southern Oklahoma during the evening hours of May 27th along and just ahead of a cold front and associated upper level trough, which progressed east across McCurtain County Oklahoma and into adjacent sections of Southwest Arkansas during the early morning hours of May 28th. The air mass ahead of this mesoscale convective complex (MCS)…
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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 SHV wrote it up.
A complex of strong to severe thunderstorms developed over Southern Oklahoma during the evening hours of May 27th along and just ahead of a cold front and associated upper level trough, which progressed east across McCurtain County Oklahoma and into adjacent sections of Southwest Arkansas during the early morning hours of May 28th. The air mass ahead of this mesoscale convective complex (MCS) was very warm, moist, and unstable, with strong wind shear helping to sustain these strong to severe thunderstorms. A couple of instances of trees blown down were reported near Hochatown and Broken Bow with these storms.
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 Shreveport, LA wrote its last area forecast discussion before the first event at May 27, 11:22 PM CST, 43 minutes earlier.
Area Forecast Discussion National Weather Service Shreveport LA 1222 AM CDT Sun May 28 2017 .DISCUSSION... Update for issuance of Severe Watch 289. Strong storms across srn OK will continue to move ewd into our area. However, swd extent is expected to be limited, thus only a few counties included attm. /12/ && .PREV DISCUSSION... /issued 1153 PM CDT Sat May 27 2017/ AVIATION... For the ArkLaTex, VFR with winds S 5-15KT and will become SW during Sunday. Aloft we are SW 25-55KTS in the low levels on our VAD. MVFR stratus will meet convection from the N before daybreak with a cold front on approach, widespread shwrs/tstms from 09-15Z will decay. The cold front will move closer but not through until Sunday night. So expect more dvlpmt of tstms for the p.m. hrs. Fropa will shift surface winds and not much else early Monday. The boundary will slowly lift back North into midweek. /24/ PREV DISCUSSION... /issued 943 PM CDT Sat May 27 2017/ DISCUSSION... Surface low across Red River valley extending into eastern Oklahoma generating severe thunderstorms across much of central and eastern Oklahoma. HRRR model suggests bulk of the convection to remain out of the ArkLaTex through 3 AM before a cold front slides south across the I-30 corridor. As convection moves south with the front, atmosphere becomes less conducive to maintain severe thunderstorms as noted by an enhanced risk across McCurtain county and a slight risk across much of northeast Texas and Southern Arkansas. Current forecast is on track, no updates at this time. /05/ && .PRELIMINARY POINT TEMPS/POPS... SHV 87 69 81 66 / 40 60 40 30 MLU 89 70 81 67 / 30 60 60 40 DEQ 82 61 85 60 / 40 40 10 10 TXK 83 65 83 63 / 40 60 20 10 ELD 84 65 81 64 / 40 60 40 20 TYR 86 68 82 66 / 40 60 30 20 GGG 85 68 81 65 / 40 60 30 20 LFK 91 72 81 68 / 30 70 60 40 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...None. LA...None. OK...None. TX...None. && 12/99/99
Hazardous Weather Outlook National Weather Service Shreveport LA 323 PM CDT Sat May 27 2017 ARZ050-051-059>061-070>073-LAZ001>006-OKZ077-TXZ096-097-108>112- 124>126-136>138-150-151-282030- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-McCurtain- Red River-Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur- Marion-Smith-Gregg-Harrison-Rusk-Panola- 323 PM CDT Sat May 27 2017 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana, southeast Oklahoma and northeast Texas. .DAY ONE...This Afternoon and Tonight... Showers and thunderstorms may shift into the area after midnight tonight. A few storms could become strong, mainly along and north of interstate 30. Strong winds and possible hail may occur. .DAYS TWO THROUGH SEVEN...Sunday through Friday... The cold front will be progressing southeastward across the Four- State Region, interacting with a warm, moist and unstable atmosphere and resulting in the development of scattered thunderstorms. Some of these thunderstorms will become strong to severe with large hail and damaging wind gusts being the primary threats. The unsettled weather pattern will continue through next week as the cold front returns to the region as a warm front, which will advect in a warm and moist airmass. As a result, isolated to scattered showers and thunderstorms will be possible next week, though the potential for widespread hazardous weather will be low. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters may possibly be needed late tonight. LAZ010>014-017>022-TXZ149-152-153-165>167-282030- De Soto-Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches- Winn-Grant-Caldwell-La Salle-Cherokee-Nacogdoches-Shelby-Angelina- San Augustine- 323 PM CDT Sat May 27 2017 This Hazardous Weather Outlook is for portions of north central Louisiana, northwest Louisiana, east Texas and northeast Texas. .DAY ONE...This Afternoon and Tonight... The probability of widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday... The cold front will be progressing southeastward across the Four- State Region, interacting with a warm, moist and unstable atmosphere and resulting in the development of scattered thunderstorms. Some of these thunderstorms will become strong to severe with large hail and damaging wind gusts being the primary threats. The unsettled weather pattern will continue through next week as the cold front returns to the region as a warm front, which will advect in a warm and moist airmass. As a result, isolated to scattered showers and thunderstorms will be possible next week, though the potential for widespread hazardous weather will be low. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters is not anticipated through tonight.
Special Weather Statement
National Weather Service Shreveport LA
1223 AM CDT SUN MAY 28 2017
OKZ077-280615-
McCurtain OK-
1223 AM CDT SUN MAY 28 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MCCURTAIN COUNTY UNTIL
115 AM CDT...
At 1222 AM CDT, Doppler radar was tracking a strong thunderstorm near
Nashoba, or 15 miles southeast of Clayton, moving east at 55 mph.
Nickel size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Broken Bow, Wright City, Plunketville, Rufe, Smithville, Hochatown,
Watson, Battiest, Pickens, Mount Herman, Sherwood, Glover, Slim,
Bethel and Ringold.
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.
&&
A severe thunderstorm watch remains in effect until 700 AM CDT for
southeastern Oklahoma.
LAT...LON 3451 9446 3404 9448 3405 9516 3424 9515
3425 9505 3451 9505
TIME...MOT...LOC 0522Z 271DEG 47KT 3445 9514
05The Western Arkansas radar (KSRX), 129 km away, was scanning. The volume nearest the first event began at 06:06 UTC.
2 thunderstorm wind. Local standard time, as filed.
A large tree was blown down on Marina Lane near Beaver's Bend Marina.
A tree was blown down and blocking a roadway on the west side of Broken Bow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oklahoma in 2017Every state in 2017This day in weather historyWarnings in Oklahoma, May 2017
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: 691352, 691353.