EF0 tornado, Nuyaka, Oklahoma, May 27, 2014

1. EF065 to 85 mphthis tornado

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mph

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating

EF0

Date

May 27, 2014

Touchdown

12:38 PM CDT (17:38 UTC)

Path length

0.3 miles (0.5 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

Property damage

$5,000

County

Okmulgee County

Touchdown point

35.611, -96.069

Lift-off point

35.611, -96.069

Record number

1405271138-01

An upper level low pressure system translated across southern Oklahoma and northern Texas on the 27th. A band of strong thunderstorms developed on the north side of this system and moved across portions of east central and northeastern Oklahoma during the morning and early afternoon hours. One of the storms within the band produced a brief, weak tornado in Okmulgee County.

A brief tornado snapped large tree limbs and moved a trailer at Dripping Springs State Park. It was witnessed by several people as it moved northwest.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a General Thunderstorms Risk. The outlook in force was issued at 16:30 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

NWS Tulsa, OK wrote its last area forecast discussion before the tornado touched down at May 27, 5:44 AM CDT, 6 hours 54 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
544 AM CDT TUE MAY 27 2014

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
FLYING CONDITIONS WILL BE WIDELY VARYING ACROSS EASTERN OKLAHOMA
AND WESTERN ARKANSAS TODAY WITH SCATTERED TO NUMEROUS SHOWERS
AND THUNDERSTORMS DEVELOPING BY THIS AFTERNOON. WILL SEE THIS
ACTIVITY TAPER OFF THIS EVENING. PATCHY MVFR TO IFR FOG WILL BE
POSSIBLE AT MANY OF THE AREA TAF SITES OVERNIGHT.

&&

.PREV DISCUSSION... /ISSUED 327 AM CDT TUE MAY 27 2014/

DISCUSSION...
ISOLATED SHOWERS/THUNDERSTORMS WERE ONGOING EARLY THIS MORNING
ACROSS FAR NE OK/NW AR...WITH MAIN CONVECTION ACROSS TX WITH ANOTHER
AREA OVER WRN OK ASSOCIATED WITH THE UPPER LOW COLD CORE. THE UPPER
LOW WILL TRACK E TODAY ALONG THE RED RIVER...WITH THE BEST CHANCES
OF PRECIPITATION ACROSS SE OK/WCNTRL AR IN THE AREA OF BEST UPPER
DIFFLUENCE. SEVERE WEATHER THREAT WILL REMAIN VERY LIMITED GIVEN
ONLY MARGINAL INSTABILITY AND WEAK WIND SHEAR...BUT WILL CONTINUE
TO SEE AREAS OF LOCALLY HEAVY RAINFALL WITH PWAT VALUES RUNNING AT
OR ABOVE 1.5 INCHES.

THE UPPER LOW WILL STALL NEAR THE ARKLATEX REGION THIS WEEK AND
GRADUALLY WEAKEN AND SHEAR OUT BY NEXT WEEKEND. GIVEN THE MID-LEVEL
WEAKNESS AND AVAILABLE MOISTURE...SCATTERED (MAINLY DIURNAL)
CONVECTION WILL BE EXPECTED DAILY. UPPER HEIGHTS BEGIN TO RISE OVER
THE WEEKEND AS AN UPPER RIDGE NOSES IN FROM THE SW...AND EXPECT
PRECIP CHANCES TO DWINDLE BY EARLY NEXT WEEK.

STAYED FAIRLY CLOSE TO MAV/MEX TEMPS THROUGH THE FORECAST
PERIOD...WHICH SHOWS A MODEST WARMING TREND BY LATE WEEK AND INTO
THE WEEKEND.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

AVIATION...10

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
500 AM CDT TUE MAY 27 2014

ARZ001-002-010-011-019-020-029-OKZ049-053>076-281000-
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-
500 AM CDT TUE MAY 27 2014

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND WESTERN ARKANSAS.
	ONSET...AFTERNOON.

FLASH FLOOD.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND WESTERN ARKANSAS.
	ONSET...AFTERNOON.

HEAVY RAIN.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND WESTERN ARKANSAS.
	ONSET...AFTERNOON.

DISCUSSION...
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY
ACROSS EASTERN OKLAHOMA AND WESTERN ARKANSAS AS AN UPPER LEVEL
LOW APPROACHES THE REGION FROM THE WEST. ANY THUNDERSTORMS THAT
DEVELOP TODAY WILL HAVE THE POTENTIAL TO PRODUCE LOCALLY HEAVY
RAINFALL...BRIEF STRONG GUSTY WINDS AND SMALL HAIL. THE STRONGEST
THUNDERSTORMS WILL BE CAPABLE OF PRODUCING ONE TO TWO INCHES OF RAIN
IN A SHORT PERIOD OF TIME WHICH COULD LEAD TO FLOODING OF LOW LYING
AREAS.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
LOCAL SPOTTER ACTIVATION MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
WEDNESDAY THROUGH SUNDAY...THUNDERSTORM POTENTIAL.
MONDAY...VERY HIGH FIRE WEATHER POTENTIAL.

EXTENDED DISCUSSION...
WIDELY SCATTERED TO SCATTERED THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE
ACROSS EASTERN OKLAHOMA AND WESTERN ARKANSAS WEDNESDAY THROUGH SUNDAY
AS AN UPPER LEVEL LOW STALLS OVER THE ARKLATEX REGION.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Okmulgee Municipal Airport (OKM), 13 km from the path, in the two hours either side.

From the Iowa Environmental Mesonet's archive of airport observations.

The Tulsa radar (KINX), 77 km away, was scanning. The volume nearest the touchdown began at 17:36 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2014 tornado in OklahomaEvery tornado in Oklahoma since 1950Warnings in force in Oklahoma nowThe forecast where you are

5 more were confirmed in the United States that day.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.