Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 427, NWS Norman, OK

May 27, 2016Kay County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 27, 2016, 6:57 PM CDT for Kay County, Oklahoma. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 27, 2016, 6:57 PM CDT (23:57 UTC)
Expired: May 27, 2016, 7:45 PM CDT
In force: 48 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Kay County, OK

The radar

The Vance AFB radar (KVNX), 88 km from the middle of the area, began a volume at 23:57 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.

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 27, 2:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 12.0 hours before the alert went out and 179 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: 401 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 782 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 27, 6:29 PM CDT, 28 minutes earlier.

Area forecast discussion, May 27, 6:29 PM CDT, 28 minutes before

Area Forecast Discussion
National Weather Service Norman OK
629 PM CDT FRI MAY 27 2016

.DISCUSSION...
Severe thunderstorms remain possible mainly near and east of I-35
through 10 PM this evening.

A broken line of strong to severe thunderstorms from Blackwell to
Oklahoma City to Pauls Valley will continue to move east and
northeast over the next few hours. Large hail up to golf ball size
is the main hazard...though damaging winds up to 60 mph and heavy
rainfall which could cause localized flooding are possible as
well. The tornado potential remain very very low due to the lack
of sufficient low level shear...generally 15 KT or less.

The aviation discussion for the 00z tafs is below.

mbs

&&

.AVIATION...
Overall...think VFR conditions will occur.

Isolated to numerous thunderstorms will affect KOKC...KOUN...and
KPNC through 02z bringing strong wind gusts...brief mvfr or lower
conditions...and possibly some hail.

Patches of fog with MVFR or lower conditions may form near
KOKC...KOUN...and KPNC 06-16z. Confidence of occurrence remains
fairly low. However...added MVFR conditions at these sites during
this time frame.

MBS

&&

.PREV DISCUSSION... /issued 255 PM CDT FRI MAY 27 2016/

DISCUSSION...
Scattered thunderstorms...some possibly severe...expected late
this afternoon and early evening. Greatest chance for severe
reports expected over northwest Oklahoma where wind potential will
exist with storms coming out of panhandle (associated with mid
level front) and over north-central Oklahoma ahead of diffuse
frontal boundary/dryline. Northern portions of Oklahoma will be
influenced less by inversion/subsidence from remnant Texas MCS.
storms near and south of I-40 are expected to be more isolated in
nature.

Pops will continue into the evening and overnight hours as mid
level trough progresses over the region. Thunderstorm chances will
be mainly confined to far southern/southeast portions of CWA
Saturday. Most models consistent in showing signal for weak mid
level wave passing over Southern Rockies helping to induce
scattered to numerous showers and storms late Sunday into Monday.
Next upper trough approaches next week with moist airmass in place
to support potential for another wet week. Flow will not be overly
strong based on longer term models with main concern through the
week being threat of flooding rains.

&&

.OUN Watches/Warnings/Advisories...
OK...None.
TX...None.
&&

11/11/17

Hazardous weather outlook, May 27, 12:10 PM CDT, 6 hours 47 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1210 PM CDT FRI MAY 27 2016

OKZ004>048-050>052-TXZ083>090-281345-
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-
1210 PM CDT FRI MAY 27 2016

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

.THUNDERSTORMS...
THERE IS A RISK FOR SEVERE STORMS ACROSS OKLAHOMA THIS AFTERNOON
AND EVENING.

LOCATION...
THE SLIGHT RISK AREA COVERS LOCATIONS EAST OF LINE EXTENDING FROM
FREEDOM...TO WEATHERFORD...TO LAWTON...AND NORTH AND WEST OF A
LINE FROM DUNCAN TO SULPHUR...TO SEMINOLE.

ACROSS THE REST OF OKLAHOMA AND WESTERN NORTH TEXAS...THERE
IS A MARGINAL RISK OF SEVERE STORMS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE STORMS WILL BE 2 PM TO 10 PM.

IMPACTS...
STORMS MAY PRODUCE:
VERY HEAVY RAINFALL...LEADING TO AREAS OF FLOODING.
HAIL UP TO THE SIZE OF GOLF BALLS OR SLIGHTLY LARGER.
WIND GUSTS 60 TO 70 MPH.

DISCUSSION...
WIDELY SCATTERED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO
DEVELOP THIS AFTERNOON...AS AN UPPER LEVEL TROUGH MOVES ACROSS
THE SOUTHERN AND CENTRAL PLAINS.  STRONG SHEAR AND MODEST
INSTABILITY MAY RESULT IN A FEW SEVERE STORMS CAPABLE OF
PRODUCING LARGE HAIL AND DAMAGING WINDS...ESPECIALLY WITHIN
THE SLIGHT RISK AREA.  MOST OF THE STORMS WILL MOVE EAST OF
THE AREA BY MID EVENING.

.HEAVY RAINFALL...
FLOODING WILL BE LIKELY WHERE THUNDERSTORMS MOVE SLOWLY...AND
WHERE HEAVY RAINFALL HAS OCCURRED RECENTLY.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
THE RISK AREAS SHOULD BE PREPARED FOR SEVERE WEATHER OPERATIONS
THROUGH THIS EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

.THUNDERSTORMS...
THUNDERSTORMS ARE EXPECTED EACH DAY. THERE IS A MARGINAL RISK OF
SEVERE STORMS OVER SOUTHEAST OKLAHOMA ON SATURDAY...AND OVER
WESTERN OKLAHOMA AND WESTERN NORTH TEXAS ON SUNDAY. STRONG STORMS
WILL BE POSSIBLE THROUGH THURSDAY...BUT THE RISK OF SEVERE STORMS
WILL BE LOWER.

.HEAVY RAIN...
LOCALIZED FLOODING WILL REMAIN A CONCERN THROUGH THE MIDDLE OF
NEXT WEEK.

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

In the hours before

Local storm report, May 27, 6:32 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
632 PM CDT FRI MAY 27 2016

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

0629 PM     HAIL             YUKON                   35.50N 97.74W
05/27/2016  E1.75 INCH       CANADIAN           OK   EMERGENCY MNGR

&&

OUN

Local storm report, May 27, 6:36 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
636 PM CDT FRI MAY 27 2016

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

0635 PM     HAIL             1 SW MOORE              35.33N 97.50W
05/27/2016  E1.00 INCH       CLEVELAND          OK   EMERGENCY MNGR

&&

OUN

Local storm report, May 27, 6:40 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
640 PM CDT FRI MAY 27 2016

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

0635 PM     HAIL             2 SE YUKON              35.48N 97.72W
05/27/2016  E2.25 INCH       CANADIAN           OK   PUBLIC

&&

OUN

Special weather statement, May 27, 6:43 PM CDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
643 PM CDT FRI MAY 27 2016

OKZ012-013-018>020-280015-
NOBLE OK-LOGAN OK-PAYNE OK-KINGFISHER OK-GARFIELD OK-
643 PM CDT FRI MAY 27 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN NOBLE...NORTHWESTERN
LOGAN...WEST CENTRAL PAYNE...NORTHEASTERN KINGFISHER AND SOUTHEASTERN
GARFIELD COUNTIES UNTIL 715 PM CDT...

AT 639 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES WEST OF
LOVELL...MOVING NORTHEAST AT 25 MPH. ANOTHER STRONG STORM WAS LOCATED
3 MILES SOUTH FAIRMONT.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 40 MPH...

LAT...LON 3596 9776 3634 9787 3647 9750 3612 9725
TIME...MOT...LOC 2339Z 242DEG 21KT 3608 9773

SIX

Local storm report, May 27, 6:45 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
645 PM CDT FRI MAY 27 2016

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

0640 PM     HAIL             MOORE                   35.34N 97.49W
05/27/2016  E1.75 INCH       CLEVELAND          OK   PUBLIC

&&

OUN

Special weather statement, May 27, 6:57 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
657 PM CDT FRI MAY 27 2016

OKZ040-041-280045-
MURRAY OK-GARVIN OK-
657 PM CDT FRI MAY 27 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MURRAY AND SOUTH
CENTRAL GARVIN COUNTIES UNTIL 745 PM CDT...

AT 655 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR KATIE...MOVING
NORTHEAST AT 20 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 40 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

LOCATIONS IMPACTED INCLUDE...
WYNNEWOOD...ELMORE CITY...KATIE AND HENNEPIN.

LAT...LON 3451 9735 3451 9745 3460 9749 3472 9726
      3464 9713 3451 9713 3450 9735
TIME...MOT...LOC 2355Z 245DEG 17KT 3455 9740

KURTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 7:04 PM CDT	Special Weather Statement	OUN	Beckham	26 min
May 26, 7:22 PM CDT	Special Weather Statement	OUN	Kiowa	23 min
May 26, 7:32 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Dewey, Ellis, Roger Mills	43 min
May 26, 7:33 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	42 min
May 26, 7:58 PM CDT	Areal Flood Advisory	OUN	Ellis, Harper	3 hr
May 26, 8:10 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods	50 min
May 26, 8:13 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woodward	47 min
May 26, 8:15 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills, Woodward	45 min
May 26, 8:23 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson	52 min
May 26, 8:24 PM CDT	Tornado Warning	OUN	Ellis	36 min
May 26, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	52 min
May 26, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	40 min
May 26, 8:57 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Major, Woods, Woodward	37 min
May 26, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Major, Roger Mills, Woodward	47 min
May 26, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa	31 min
May 26, 9:01 PM CDT	Tornado Warning	OUN	Ellis, Woodward	33 min
May 26, 9:08 PM CDT	Areal Flood Advisory	OUN	Ellis, Roger Mills, Woodward	3 hr
May 26, 9:30 PM CDT	Tornado Warning	OUN	Roger Mills	30 min
May 26, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	45 min
May 26, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Major, Roger Mills, Woodward	45 min
May 26, 9:57 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	48 min
May 26, 9:59 PM CDT	Tornado Warning	OUN	Ellis, Roger Mills	35 min
May 26, 10:14 PM CDT	Flash Flood Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	4 hr
May 26, 10:29 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Blaine, Dewey, Ellis, Major, Roger Mills and 2 more	46 min
May 26, 10:33 PM CDT	Areal Flood Advisory	OUN	Comanche, Kiowa, Tillman	3 hr
May 26, 10:34 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	26 min
May 26, 10:41 PM CDT	Flash Flood Warning	OUN	Comanche	2 hr
May 26, 10:42 PM CDT	High Wind Warning	OUN	Caddo, Canadian, Grady	78 min
May 26, 10:44 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	27 min
May 26, 10:57 PM CDT	Special Weather Statement	OUN	Grady	33 min
May 26, 11:02 PM CDT	Severe Thunderstorm Warning	OUN	Grady, McClain	28 min
May 26, 11:16 PM CDT	Special Weather Statement	OUN	Major	29 min
May 26, 11:19 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland	41 min
May 27, 12:10 AM CDT	Special Weather Statement	OUN	Lincoln, Oklahoma	35 min
May 27, 12:16 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Oklahoma, Pottawatomie	44 min
May 27, 4:23 AM CDT	Special Weather Statement	OUN	Carter, Love	67 min
May 27, 4:53 AM CDT	Areal Flood Advisory	OUN	Carter, Love	37 min
May 27, 5:02 AM CDT	Special Weather Statement	OUN	Carter	28 min
May 27, 7:32 AM CDT	Special Weather Statement	OUN	Carter, Garvin, Jefferson, Love, Murray	58 min
May 27, 2:02 PM CDT	Special Weather Statement	OUN	Grant	28 min
May 27, 2:25 PM CDT	Special Weather Statement	OUN	Grant	35 min
May 27, 2:56 PM CDT	Special Weather Statement	OUN	Grant	34 min
May 27, 3:09 PM CDT	Severe Thunderstorm Warning	OUN	Grant	51 min
May 27, 3:48 PM CDT	Areal Flood Advisory	OUN	Grant	117 min
May 27, 3:54 PM CDT	Special Weather Statement	OUN	Alfalfa	36 min
May 27, 3:57 PM CDT	Severe Thunderstorm Warning	OUN	Grant	38 min
May 27, 4:26 PM CDT	Special Weather Statement	OUN	Comanche	34 min
May 27, 4:42 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	35 min
May 27, 4:45 PM CDT	Special Weather Statement	OUN	Grant	30 min
May 27, 4:48 PM CDT	Severe Thunderstorm Warning	OUN	Grant	42 min
May 27, 4:51 PM CDT	Special Weather Statement	OUN	Stephens	24 min
May 27, 5:15 PM CDT	Special Weather Statement	OUN	Stephens	45 min
May 27, 5:28 PM CDT	Special Weather Statement	OUN	Grant	32 min
May 27, 5:30 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Stephens	45 min
May 27, 5:36 PM CDT	Special Weather Statement	OUN	Stephens	24 min
May 27, 5:40 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Stephens	50 min
May 27, 5:45 PM CDT	Special Weather Statement	OUN	Grady	30 min
May 27, 5:46 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain	44 min
May 27, 5:49 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay	41 min
May 27, 6:11 PM CDT	Special Weather Statement	OUN	Cleveland, Garvin, McClain	49 min
May 27, 6:19 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	41 min
May 27, 6:22 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	38 min
May 27, 6:27 PM CDT	Special Weather Statement	OUN	Garvin, Murray	33 min
May 27, 6:35 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Oklahoma	40 min
May 27, 6:43 PM CDT	Special Weather Statement	OUN	Garfield	32 min
May 27, 6:45 PM CDT	Areal Flood Advisory	OUN	Grant, Kay	3 hr
May 27, 6:46 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble	44 min
May 27, 6:53 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Oklahoma	52 min
May 27, 6:57 PM CDT	Special Weather Statement	OUN	Garvin	48 min
May 26, 7:02 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	28 min
May 26, 7:34 PM CDT	Special Weather Statement	OUN	Foard	26 min
May 26, 7:45 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Knox	45 min
May 26, 8:04 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	41 min
May 26, 8:25 PM CDT	Severe Thunderstorm Warning	OUN	Foard	50 min
May 26, 8:48 PM CDT	Tornado Warning	OUN	Foard	27 min
May 26, 9:15 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Wilbarger	45 min
May 27, 3:25 AM CDT	Special Weather Statement	OUN	Clay	50 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.