Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 258, NWS Norman, OK

May 27, 20218 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 27, 2021, 6:03 PM CDT for 8 counties in Oklahoma. It was in force for 42 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 27, 2021, 6:03 PM CDT (23:03 UTC)
Expired: May 27, 2021, 6:45 PM CDT
In force: 42 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Canadian County, OK, Cleveland County, OK, Grady County, OK, Lincoln County, OK, McClain County, OK, Oklahoma County, OK, Pottawatomie County, OK, Seminole County, OK

The radar

The Norman radar (KTLX), 45 km from the middle of the area, began a volume at 23:02 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.

What was reported inside it

Time	Report	Where	Remark
May 27, 6:32 PM CDT	TSTM WND GST 60	3 Ne Little, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 29 minutes after it went out.

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 27, 11:58 AM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.1 hours before the alert went out and 60 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: 2431 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 765 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 264 m²/s²
0-3 km storm-relative helicity: 360 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

As transmitted.

699 
WUUS54 KOUN 272303
SVROUN
OKC017-027-051-081-087-109-125-133-272345-
/O.NEW.KOUN.SV.W.0258.210527T2303Z-210527T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
603 PM CDT Thu May 27 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Northeastern Grady County in central Oklahoma...
  Northern Seminole County in east central Oklahoma...
  Lincoln County in central Oklahoma...
  Oklahoma County in central Oklahoma...
  Northern Cleveland County in central Oklahoma...
  Southeastern Canadian County in central Oklahoma...
  Northern Pottawatomie County in central Oklahoma...
  Northwestern McClain County in central Oklahoma...

* Until 645 PM CDT.

* At 602 PM CDT, severe thunderstorms were located along a line 
  extending from Meeker to Choctaw to Mustang, moving east southeast 
  at 50 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Oklahoma City, Norman, Moore, Midwest City, Shawnee, Del City, El
  Reno, Newcastle, Tecumseh, Chandler, Yukon, Bethany, Mustang,
  Choctaw, Warr Acres, The Village, Tuttle, Harrah, McLoud and
  Spencer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3531 9658 3518 9786 3531 9800 3549 9805
      3563 9726 3579 9690 3584 9662 3540 9662
      3540 9660 3541 9658 3539 9654 3544 9657
      3546 9654 3543 9651 3543 9649 3546 9648
      3546 9646 3545 9644 3536 9644
TIME...MOT...LOC 2302Z 262DEG 43KT 3574 9673 3560 9675 3550 9683 

HAIL...1.00IN
WIND...60MPH
 
$$

JT

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, 2:25 PM CDT, 3 hours 38 minutes earlier.

Area forecast discussion, May 27, 2:25 PM CDT, 3 hours 38 minutes before

Area Forecast Discussion
National Weather Service Norman OK
225 PM CDT Thu May 27 2021

...New SHORT TERM, LONG TERM, UPPER AIR...

.SHORT TERM...
(This evening through Friday)
Issued at 224 PM CDT Thu May 27 2021

Strong to severe thunderstorms will continue into the evening
across most of the area as a cold front moves into minimally-
capped environment (per 18Z special upper air sounding). The
ongoing storms could push out an outflow boundary or two, which
could lead to slight enhancement of a tornado threat if any storms
can form along it, as winds ahead of the boundary could be backed
slightly. Currently, as storms form along the aforementioned cold
front later this afternoon, there may be a brief window for some
discrete storms. The deep-layer shear vector being mostly
parallel to the boundary will foster storm conglomeration shortly
after initiation, and eventually forming into a line that will
move through west-central and central OK. The main threats still
appear to be damaging winds in excess of 80mph and hail up to the
size of baseballs, as SPC mesoanalysis suggests there is at least
MLCAPE values upwards of at least 3000 J/kg across the area. With
numerous storms producing heavy rain rates across areas with
already moist soils, flooding and flash flooding could be possible
across central OK into northern and northeast OK.

Bunker

&&

.LONG TERM...
(Friday night through next Wednesday)
Issued at 224 PM CDT Thu May 27 2021

Over the weekend mid-level heights will gradually increase as an
approaching mid-level ridge moves into the area. Showers and
thunderstorms are possible on Sunday as a shortwave trough
traverses the area and attendant upslope flow along the Rockies.
Another shortwave should move through on Monday morning, bringing
with it additional chances for showers and storms. A longwave
trough will move in by Tuesday morning and an associated cold
front will bring in showers and storms across the area. Northerly
surface flow should persist through much of the long term, with
slight chances for showers and storms. High temperatures should
stay in the mid to upper 70s across most of the area throughout
the period.

Bunker

&&

.AVIATION...
(18Z TAFS)
Issued at 1127 AM CDT Thu May 27 2021

Two rounds of showers and thunderstorms will be possible
throughout the period. The first round of storms will start around
17Z and will initiate in western OK, and move towards the east
into central OK. The next round will be later this afternoon
associated with a cold front that will sweep through the area.
These storms will move from the north to the south. Otherwise,
some MVFR ceilings are possible through the period, along with a
wind shift associated with the cold front. Some sites could see
some IFR ceilings associated with the aforementioned
thunderstorms.

&&

.UPPER AIR...
Issued at 224 PM CDT Thu May 27 2021

An Upper Air flight is planned later this evening if time permits..

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  59  72  54  72 /  90   0  10  10
Hobart OK         60  75  56  74 /  70  10  10  10
Wichita Falls TX  65  77  60  76 /  80  30  30  20
Gage OK           53  72  53  73 /  10  10  10  10
Ponca City OK     53  72  50  72 /  50   0   0   0
Durant OK         66  80  59  75 /  90  30  20  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch until 1 AM CDT Friday for OKZ008-012-013-018>020-
     024>031.

TX...None.
&&

SHORT TERM...13
LONG TERM....13
AVIATION...13

Hazardous weather outlook, May 27, 11:41 AM CDT, 6 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
1141 AM CDT Thu May 27 2021

OKZ004>048-050>052-TXZ083>090-281645-
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-
1141 AM CDT Thu May 27 2021

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Today and Tonight...

.Thunderstorms...
There is an enhanced risk for severe thunderstorms Thursday
afternoon and evening across most of Oklahoma into parts of
western north Texas. Two rounds of storms are possible this
afternoon. The first round is likely to start around the early
afternoon and move from western OK into central OK. Later in the
afternoon, storms will fire along a cold front in northern OK and
move south across the area. Large hail up to the size of baseballs
and damaging winds up to 80 mph will be the main threats, though
during the early evening there will also be a low tornado risk.

.Heavy Rainfall...
Localized heavy rainfall and flooding will be possible late on
Thursday, mainly across central and southern Oklahoma and north
Texas.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

Storm spotter groups and emergency management personnel across
Oklahoma and western north Texas should prepare for severe
weather operations this afternoon and evening.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

.Thunderstorms...
Friday and Saturday will see thunderstorm chances across mainly
southern Oklahoma and north Texas. More widespread chances for
showers and storms will return Sunday through Wednesday 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, 4:54 PM CDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
454 PM CDT THU MAY 27 2021

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

0450 PM     FLOOD            LUTHER                  35.66N 97.20W
05/27/2021                   OKLAHOMA           OK   PUBLIC

            CREEK OVERFLOWING.

&&

RCB

Special weather statement, May 27, 4:56 PM CDT, 1 hour 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
456 PM CDT Thu May 27 2021

OKZ025-026-272215-
Oklahoma OK-Lincoln OK-
456 PM CDT Thu May 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR east central Oklahoma and
southwestern Lincoln Counties Until 515 PM CDT...

AT 454 PM CDT, a strong thunderstorm was located 5 miles south of
Wellston, moving east at 35 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

LAT...LON 3552 9720 3568 9721 3573 9699 3555 9689
TIME...MOT...LOC 2154Z 258DEG 29KT 3561 9710

JT

Local storm report, May 27, 5:11 PM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
511 PM CDT THU MAY 27 2021

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

0510 PM     FLOOD            WELLSTON                35.69N 97.06W
05/27/2021                   LINCOLN            OK   EMERGENCY MNGR

            NORTH BOUND LANES HWY 177 NORTH OF WELLSTON
            AT 880 RD ARE UNDER WATER.

&&

RCB

Local storm report, May 27, 5:12 PM CDT, 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
512 PM CDT THU MAY 27 2021

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

0501 PM     HAIL             4 SW CARNEY             35.76N 97.06W
05/27/2021  E1.00 INCH       LINCOLN            OK   EMERGENCY MNGR

&&

RCB

Local storm report, May 27, 5:19 PM CDT, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
519 PM CDT THU MAY 27 2021

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

0519 PM     FLOOD            4 ENE SEWARD            35.81N 97.42W
05/27/2021                   LOGAN              OK   EMERGENCY MNGR

            REPORTS OF WATER ABOUT TO GO INTO HOUSES,
            FLOODED YARDS, AND STREETS.

&&

RCB

Special weather statement, May 27, 5:31 PM CDT, 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
531 PM CDT Thu May 27 2021

OKZ017-018-023-024-272300-
Kingfisher OK-Canadian OK-Caddo OK-Blaine OK-
531 PM CDT Thu May 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR southern Kingfisher...
northwestern Canadian...north central Caddo and southern Blaine
Counties Until 600 PM CDT...

AT 529 PM CDT, strong thunderstorms were along a line extending from
7 miles south of Loyal to 8 miles southeast of Fay, moving east at 35
MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

LAT...LON 3589 9768 3579 9768 3549 9846 3572 9863
      3576 9863 3594 9819
TIME...MOT...LOC 2229Z 287DEG 29KT 3586 9816 3572 9856

..speg.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 7:27 PM CDT	Special Weather Statement	OUN	Harper	33 min
May 26, 7:45 PM CDT	Special Weather Statement	OUN	Harper	30 min
May 26, 8:13 PM CDT	Severe Thunderstorm Warning	OUN	Harper	47 min
May 26, 8:51 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	39 min
May 26, 9:16 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	44 min
May 26, 9:56 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Ellis, Harper, Woods, Woodward	49 min
May 26, 10:41 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant, Woods, Woodward	49 min
May 26, 11:24 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	51 min
May 27, 1:37 AM CDT	Special Weather Statement	OUN	Beckham	23 min
May 27, 2:07 AM CDT	Special Weather Statement	OUN	Beckham	38 min
May 27, 3:28 AM CDT	Special Weather Statement	OUN	Blaine, Custer, Dewey	62 min
May 27, 4:27 AM CDT	Special Weather Statement	OUN	Blaine, Garfield, Kingfisher, Logan, Major	63 min
May 27, 6:39 AM CDT	Special Weather Statement	OUN	Garfield, Noble	36 min
May 27, 10:28 AM CDT	Flood Watch	OUN	Canadian, Cleveland, Garfield, Grady, Kay, Kingfisher and 8 more	12 hr
May 27, 11:56 AM CDT	Special Weather Statement	OUN	Kingfisher	34 min
May 27, 12:00 PM CDT	Special Weather Statement	OUN	Blaine	30 min
May 27, 12:11 PM CDT	Special Weather Statement	OUN	Dewey	34 min
May 27, 12:14 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	46 min
May 27, 12:23 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	52 min
May 27, 12:29 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher	46 min
May 27, 12:35 PM CDT	Special Weather Statement	OUN	Kay	25 min
May 27, 12:39 PM CDT	Areal Flood Advisory	OUN	Blaine, Garfield, Kingfisher, Logan	3 hr
May 27, 12:40 PM CDT	Special Weather Statement	OUN	Garfield	35 min
May 27, 12:48 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	42 min
May 27, 12:51 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher	39 min
May 27, 12:58 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble, Payne	47 min
May 27, 1:01 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major, Noble	44 min
May 27, 1:08 PM CDT	Special Weather Statement	OUN	Alfalfa, Grant	37 min
May 27, 1:14 PM CDT	Tornado Warning	OUN	Kingfisher	46 min
May 27, 1:17 PM CDT	Special Weather Statement	OUN	Woodward	28 min
May 27, 1:23 PM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	39 min
May 27, 1:25 PM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble	36 min
May 27, 1:29 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	46 min
May 27, 1:30 PM CDT	Areal Flood Advisory	OUN	Garfield, Grant, Kay, Noble	3 hr
May 27, 1:41 PM CDT	Flash Flood Warning	OUN	Blaine, Kingfisher, Logan	4 hr
May 27, 1:42 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	17 min
May 27, 1:47 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	43 min
May 27, 1:50 PM CDT	Special Weather Statement	OUN	Garfield, Grant, Kay	25 min
May 27, 1:59 PM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	15 hr
May 27, 2:03 PM CDT	Special Weather Statement	OUN	Major	27 min
May 27, 2:15 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan, Payne	45 min
May 27, 2:17 PM CDT	Special Weather Statement	OUN	Grant, Kay	43 min
May 27, 2:34 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Payne	56 min
May 27, 2:40 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Major	50 min
May 27, 2:46 PM CDT	Flash Flood Warning	OUN	Lincoln, Logan, Oklahoma, Payne	3 hr
May 27, 2:51 PM CDT	Areal Flood Advisory	OUN	Canadian, Kingfisher, Logan, Oklahoma	3 hr
May 27, 2:51 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Logan	39 min
May 27, 3:11 PM CDT	Special Weather Statement	OUN	Lincoln	19 min
May 27, 3:18 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble, Payne	42 min
May 27, 3:21 PM CDT	Areal Flood Advisory	OUN	Lincoln, Payne	3 hr
May 27, 3:27 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Major	48 min
May 27, 3:27 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Lincoln, Logan, Oklahoma, Payne	48 min
May 27, 3:30 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Payne	30 min
May 27, 3:34 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble, Payne	41 min
May 27, 3:39 PM CDT	Flash Flood Warning	OUN	Garfield, Kingfisher, Logan, Major, Noble, Payne	2 hr
May 27, 3:42 PM CDT	Special Weather Statement	OUN	Noble	33 min
May 27, 3:46 PM CDT	Special Weather Statement	OUN	Logan	29 min
May 27, 3:51 PM CDT	Severe Thunderstorm Warning	OUN	Logan	24 min
May 27, 3:53 PM CDT	Severe Thunderstorm Warning	OUN	Noble	37 min
May 27, 3:56 PM CDT	Special Weather Statement	OUN	Oklahoma	19 min
May 27, 4:03 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Logan	27 min
May 27, 4:10 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma, Payne	65 min
May 27, 4:15 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Dewey, Garfield, Kingfisher, Major	45 min
May 27, 4:24 PM CDT	Severe Thunderstorm Warning	OUN	Logan, Noble, Payne	38 min
May 27, 4:38 PM CDT	Special Weather Statement	OUN	Kingfisher	7 min
May 27, 4:53 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Logan	37 min
May 27, 4:56 PM CDT	Areal Flood Advisory	OUN	Blaine, Kingfisher	3 hr
May 27, 4:56 PM CDT	Special Weather Statement	OUN	Lincoln	19 min
May 27, 4:56 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Garfield, Kingfisher, Logan, Major	49 min
May 27, 5:00 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Oklahoma	45 min
May 27, 5:19 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Lincoln, Logan, Oklahoma	41 min
May 27, 5:25 PM CDT	Flash Flood Warning Considerable damage threat	OUN	Canadian, Kingfisher, Lincoln, Logan, Oklahoma	3 hr
May 27, 5:31 PM CDT	Special Weather Statement	OUN	Canadian	29 min
May 27, 5:47 PM CDT	Flash Flood Warning	OUN	Kingfisher, Logan	106 min
May 27, 5:52 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	38 min
May 27, 6:00 PM CDT	Flash Flood Warning	OUN	Canadian, Lincoln, Oklahoma, Pottawatomie	3 hr
May 27, 6:14 PM CDT	Special Weather Statement	OUN	Washita	31 min
May 27, 6:21 PM CDT	Flash Flood Warning Considerable damage threat	OUN	Canadian, Cleveland, Oklahoma	3 hr
May 27, 6:39 PM CDT	Areal Flood Advisory	OUN	Canadian, Cleveland, Grady, McClain	111 min
May 27, 6:48 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Washita	15 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Every severe thunderstorm warning in 2021

Sources

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