Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 327, NWS Norman, OK

May 23, 2016Harmon County, Jackson County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 23, 2016, 2:01 AM CDT for Harmon County, Jackson County, Oklahoma. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 23, 2016, 2:01 AM CDT (07:01 UTC)
Expired: May 23, 2016, 2:45 AM CDT
In force: 44 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Harmon County, OK, Jackson County, OK

The radar

The Altus AFB radar (KFDR), 51 km from the middle of the area, began a volume at 07:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 22, 8:48 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.0 hours before the alert went out and 209 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1204 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1060 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

183 
WUUS54 KOUN 230701
SVROUN
OKC057-065-230745-
/O.NEW.KOUN.SV.W.0327.160523T0701Z-160523T0745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
201 AM CDT MON MAY 23 2016

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JACKSON COUNTY IN SOUTHWESTERN OKLAHOMA...
  SOUTHEASTERN HARMON COUNTY IN SOUTHWESTERN OKLAHOMA...

* UNTIL 245 AM CDT

* AT 200 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ELDORADO...
  MOVING EAST AT 35 MPH.

  HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
           WIND DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  ALTUS...OLUSTEE...ELDORADO...MARTHA...ELMER...DUKE AND ALTUS AIR FORCE
  BASE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3477 9930 3447 9922 3446 9938 3437 9941
      3441 9951 3442 9958 3438 9960 3438 9964
      3442 9975 3456 9988
TIME...MOT...LOC 0700Z 262DEG 31KT 3451 9970 

HAIL...1.50IN
WIND...60MPH
 
$$

03

1 follow-up statement

404 
WWUS54 KOUN 230718
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
218 AM CDT MON MAY 23 2016

OKC057-065-230745-
/O.CON.KOUN.SV.W.0327.000000T0000Z-160523T0745Z/
JACKSON OK-HARMON OK-
218 AM CDT MON MAY 23 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM CDT
FOR JACKSON AND SOUTHEASTERN HARMON COUNTIES...

AT 218 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ELDORADO...
MOVING EAST AT 15 MPH.

HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
         DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT WIND 
         DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
ALTUS...OLUSTEE...ELDORADO...MARTHA...ELMER...DUKE AND ALTUS AIR FORCE
BASE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3477 9930 3447 9922 3446 9938 3437 9941
      3441 9951 3442 9958 3438 9960 3438 9964
      3442 9975 3460 9978
TIME...MOT...LOC 0718Z 261DEG 13KT 3452 9963 

HAIL...1.75IN
WIND...60MPH
 
$$

03

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 23, 12:35 AM CDT, 1 hour 26 minutes earlier.

Area forecast discussion, May 23, 12:35 AM CDT, 1 hour 26 minutes before

Area Forecast Discussion
National Weather Service Norman OK
1235 AM CDT MON MAY 23 2016

.DISCUSSION...
23/06Z TAF discussion follows.

&&

.AVIATION...
VFR/MVFR conditions will prevail most of forecast period with ifr
conditions possible in and near stronger storms over southwest
Oklahoma and KSPS. Shield of rain with embedded strong-severe
storms expected to pick up pace and move east of terminals toward
and after 10Z. Strong wind gusts will be possible well away from
any storms due to larger scale pressure perturbations. MVFR still
expected to dominate forecast after rain moves out with some VFR
possible after 18Z tomorrow. Low confidence on storm timing
tomorrow so prob30 was included all sites late afternoon through
evening.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  66  82  68  87 /  30  20  50  20
Hobart OK         67  88  68  91 /  40  40  30  20
Wichita Falls TX  67  87  70  90 /  40  20  20  10
Gage OK           65  91  63  93 /  30  20  20  10
Ponca City OK     67  83  68  88 /  30  30  50  20
Durant OK         68  83  70  84 /  30  30  40  20

&&

.OUN Watches/Warnings/Advisories...
OK...Wind Advisory until 3 AM CDT early this morning for OKZ014-016-
     021-022.

TX...None.
&&

06/11

Hazardous weather outlook, May 22, 10:00 PM CDT, 4 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
1000 PM CDT SUN MAY 22 2016

OKZ004>048-050>052-TXZ083>090-231000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-
NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-
BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-
TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-
JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-
FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1000 PM CDT SUN MAY 22 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...REST OF TONIGHT...

.THUNDERSTORMS...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN SOUTHWESTERN
OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK EXTENDS SOUTH AND WEST OF A LINE FROM ERICK AND
ELK CITY... TO NEAR HOBART AND LAWTON OKLAHOMA... TO HENRIETTA
TEXAS. A MARGINAL RISK EXTENDS TO THE EAST OF THE SLIGHT RISK AND
SOUTHWEST OF A LINE FROM WOODWARD AND WEATHERFORD... TO DUNCAN
OKLAHOMA.

TIMING...
SEVERE STORMS WILL BE POSSIBLE THROUGH 2 AM.

IMPACTS...
HAIL UP TO THE SIZE OF GOLF BALLS... DAMAGING WIND GUSTS TO 75
MPH... FREQUENT INTENSE LIGHTNING... AND HEAVY RAIN WILL BE THE
MAIN CONCERNS. A BRIEF TORNADO OR TWO MAY ALSO BE POSSIBLE IN
PARTS OF SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS.

DISCUSSION...
THUNDERSTORMS WILL MOVE ACROSS PORTIONS OF THE AREA THROUGH
MONDAY MORNING. SOME OF THE STORMS WILL BE STRONG TO SEVERE
OVERNIGHT... ESPECIALLY IN PARTS OF SOUTHWEST OKLAHOMA AND
WESTERN NORTH TEXAS. LARGE HAIL AND STRONG WIND GUSTS WILL BE THE
MAIN CONCERNS BUT AS THE NIGHT PROGRESSES STRONG WINDS COULD
BECOME A BIGGER CONCERN. A FEW BRIEF TORNADOES MAY ALSO DEVELOP IN
PARTS OF SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS.

THE POTENTIAL FOR SEVERE WEATHER WILL DECREASE AFTER 2 AM MONDAY
BUT A FEW STORMS COULD STILL PRODUCE SMALL HAIL AND GUSTY WINDS.
HEAVY RAIN THAT COULD LEAD TO LOCALIZED FLOODING AND FREQUENT
INTENSE LIGHTNING WILL REMAIN A CONCERN THROUGH THE NIGHT.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL LOCATED
WITHIN THE SLIGHT RISK AREA SHOULD PREPARE FOR SEVERE WEATHER
OPERATIONS THROUGH EARLY MONDAY MORNING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

.THUNDERSTORMS...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS MONDAY AND TUESDAY
OF THE UPCOMING WORK WEEK. THE RISK AREAS COVER MUCH OF OKLAHOMA
AND WESTERN NORTH TEXAS. THUNDERSTORMS WILL LIKELY FORM DURING THE
AFTERNOON HOURS AND IMPACT WESTERN OKLAHOMA AND WESTERN NORTH
TEXAS...BEFORE MOVING EAST DURING THE LATE AFTERNOON AND NIGHT.

THUNDERSTORMS WILL REMAIN IN THE FORECAST WEDNESDAY THROUGH
SATURDAY. SOME OF THESE STORMS MAY BE SEVERE...ESPECIALLY THURSDAY
AND FRIDAY.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

KURTZ/EM

In the hours before

Local storm report, May 22, 11:56 PM CDT, 2 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NORMAN OK
1156 PM CDT SUN MAY 22 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1143 PM     NON-TSTM WND GST 5 WSW ELK CITY          35.39N 99.50W
05/22/2016  E60.00 MPH       BECKHAM            OK   TRAINED SPOTTER

            SEMI BLOWN OVER ON I-40 OVERPASS.

&&

MDAY

Local storm report, May 23, 12:22 AM CDT, 1 hour 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1222 AM CDT MON MAY 23 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1221 AM     HAIL             QUANAH                  34.30N 99.74W
05/23/2016  E1.00 INCH       HARDEMAN           TX   TRAINED SPOTTER

&&

RBARNES

Local storm report, May 23, 12:23 AM CDT, 1 hour 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1223 AM CDT MON MAY 23 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1215 AM     TSTM WND GST     ELMER                   34.48N 99.35W
05/23/2016  M60 MPH          JACKSON            OK   TRAINED SPOTTER

&&

RBARNES

Local storm report, May 23, 1:04 AM CDT, 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
104 AM CDT MON MAY 23 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1259 AM     TSTM WND GST     SW MANITOU              34.51N 98.98W
05/23/2016  M83 MPH          TILLMAN            OK   BROADCAST MEDIA

&&

RBARNES

Local storm report, May 23, 1:11 AM CDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
111 AM CDT MON MAY 23 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0110 AM     TSTM WND GST     6 S FREDERICK           34.30N 99.01W
05/23/2016  M59 MPH          TILLMAN            OK   TRAINED SPOTTER

&&

RBARNES

Special weather statement, May 23, 1:51 AM CDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
151 AM CDT MON MAY 23 2016

OKZ028>031-040-042-230715-
POTTAWATOMIE OK-PONTOTOC OK-MCCLAIN OK-CLEVELAND OK-SEMINOLE OK-
GARVIN OK-
151 AM CDT MON MAY 23 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN POTTAWATOMIE...
NORTHWESTERN PONTOTOC...SOUTHERN MCCLAIN...CLEVELAND...SOUTHWESTERN
SEMINOLE AND NORTH CENTRAL GARVIN COUNTIES UNTIL 215 AM CDT...

AT 150 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
NEAR GOLDSBY TO NEAR PURCELL TO NEAR ROSEDALE...MOVING EAST AT 35 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
NORMAN...NEWCASTLE...PURCELL...NOBLE...SLAUGHTERVILLE...LEXINGTON...PINK...
GOLDSBY...KONAWA...BYNG...WAYNE...WASHINGTON...ASHER...TRIBBEY...WANETTE...
BYARS...ST. LOUIS...ETOWAH...ROSEDALE AND BROOKSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3536 9709 3511 9689 3491 9655 3483 9715
      3495 9745 3518 9757
TIME...MOT...LOC 0650Z 254DEG 28KT 3514 9746 3498 9737 3489 9715

MAHALE

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 22, 8:32 PM CDT	Special Weather Statement	OUN	Beckham, Ellis, Harmon, Harper, Roger Mills	58 min
May 22, 9:27 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	48 min
May 22, 10:09 PM CDT	Areal Flood Advisory	OUN	Beckham, Greer, Harmon	4 hr
May 22, 10:09 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	18 min
May 22, 10:20 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	40 min
May 22, 10:42 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson	48 min
May 22, 10:55 PM CDT	Flash Flood Warning	OUN	Harmon	5 hr
May 22, 11:03 PM CDT	Tornado Warning	OUN	Greer, Jackson	27 min
May 22, 11:07 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	38 min
May 22, 11:09 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	51 min
May 22, 11:10 PM CDT	Special Weather Statement	OUN	Roger Mills	50 min
May 22, 11:13 PM CDT	Special Weather Statement	OUN	Alfalfa	62 min
May 22, 11:17 PM CDT	Special Weather Statement	OUN	Caddo	28 min
May 22, 11:25 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	35 min
May 22, 11:50 PM CDT	Wind Advisory	OUN	Alfalfa, Beckham, Blaine, Caddo, Custer, Dewey and 7 more	3 hr
May 23, 12:05 AM CDT	Flash Flood Warning	OUN	Harmon, Jackson	3 hr
May 23, 12:11 AM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	49 min
May 23, 12:17 AM CDT	Severe Thunderstorm Warning	OUN	Jackson	43 min
May 23, 12:37 AM CDT	Flash Flood Warning	OUN	Jackson, Tillman	6 hr
May 23, 12:39 AM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	51 min
May 23, 12:54 AM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	51 min
May 23, 1:41 AM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Tillman	3 hr
May 23, 1:43 AM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens, Tillman	47 min
May 23, 1:51 AM CDT	Special Weather Statement	OUN	Cleveland, McClain	24 min
May 23, 1:58 AM CDT	Tornado Warning	OUN	Cotton, Jefferson, Stephens	32 min
May 23, 2:26 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray, Stephens	49 min
May 23, 2:28 AM CDT	Areal Flood Advisory	OUN	Caddo, Carter, Comanche, Cotton, Garvin, Grady and 3 more	3 hr
May 23, 2:29 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Love, Stephens	46 min
May 23, 2:42 AM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	48 min
May 23, 3:06 AM CDT	Areal Flood Advisory	OUN	Jefferson	3 hr
May 23, 3:14 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Johnston, Love, Marshall and 2 more	46 min
May 23, 3:19 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	25 min
May 23, 3:58 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Carter, Coal, Johnston, Love and 2 more	47 min
May 23, 4:22 AM CDT	Flood Watch	OUN	Beckham, Caddo, Comanche, Cotton, Grady, Greer and 7 more	40 hr
May 23, 4:53 AM CDT	Special Weather Statement	OUN	Atoka, Bryan	52 min
May 23, 7:44 AM CDT	Special Weather Statement	OUN	Cleveland, Oklahoma, Pottawatomie	46 min
May 23, 8:01 AM CDT	Special Weather Statement	OUN	Jefferson	29 min
May 23, 9:47 AM CDT	River Flood Warning	OUN	Cotton, Jefferson, Tillman	3 days
May 23, 9:47 AM CDT	River Flood Warning	OUN	Love	5 days
May 23, 9:48 AM CDT	River Flood Warning	OUN	Cotton	4 days
May 23, 11:08 AM CDT	Special Weather Statement	OUN	Johnston	37 min
May 23, 11:10 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Marshall	31 min
May 23, 12:32 PM CDT	Special Weather Statement	OUN	Bryan	28 min
May 23, 1:03 PM CDT	Special Weather Statement	OUN	Bryan	27 min
May 23, 1:47 PM CDT	Special Weather Statement	OUN	Garfield	28 min
May 23, 2:40 PM CDT	Special Weather Statement	OUN	Noble	35 min
May 23, 4:48 PM CDT	Special Weather Statement	OUN	Payne	27 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.