Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 92, NWS Tulsa, OK

May 23, 20184 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 23, 2018, 6:28 PM CDT for 4 counties in Oklahoma. It was in force for 47 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 23, 2018, 6:28 PM CDT (23:28 UTC)
Expired: May 23, 2018, 7:15 PM CDT
In force: 47 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Muskogee County, OK, Okmulgee County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 34 km from the middle of the area, began a volume at 23:29 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 23, 6:47 PM CDT	TSTM WND GST 58	Stonebluff, 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 19 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 nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.5 hours before the alert went out and 168 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: 722 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 981 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -73 m²/s²
0-3 km storm-relative helicity: -39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

838 
WUUS54 KTSA 232328
SVRTSA
OKC101-111-143-145-240015-
/O.NEW.KTSA.SV.W.0092.180523T2328Z-180524T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
628 PM CDT WED MAY 23 2018

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southwestern Wagoner County in northeastern Oklahoma...
  Northwestern Muskogee County in east central Oklahoma...
  Northeastern Okmulgee County in northeastern Oklahoma...
  Southeastern Tulsa County in northeastern Oklahoma...

* Until 715 PM CDT

* At 628 PM CDT, severe thunderstorms were located along a line
  extending from 2 miles south of Bixby to 4 miles west of Haskell,
  moving east at 15 mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations in or near the path include...
  Broken Arrow...                   Bixby...
  Coweta...                         Haskell...
  Stonebluff...                     Redbird...
  Leonard...                        Choska...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3600 9574 3584 9553 3575 9578 3593 9592
TIME...MOT...LOC 2328Z 254DEG 15KT 3591 9587 3582 9576 

HAIL...0.75IN
WIND...60MPH
 
$$

1 follow-up statement

183 
WWUS54 KTSA 240010
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
710 PM CDT WED MAY 23 2018

OKC101-111-143-145-240020-
/O.EXP.KTSA.SV.W.0092.000000T0000Z-180524T0015Z/
Wagoner OK-Muskogee OK-Okmulgee OK-Tulsa OK-
710 PM CDT WED MAY 23 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WAGONER...
NORTHWESTERN MUSKOGEE...NORTHEASTERN OKMULGEE AND SOUTHEASTERN TULSA
COUNTIES WILL EXPIRE AT 715 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore the warning will
be allowed to expire.  However gusty winds are still possible with
these thunderstorms.

LAT...LON 3600 9574 3584 9553 3575 9578 3593 9592
TIME...MOT...LOC 0010Z 256DEG 14KT 3596 9567 3582 9561 

$$

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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 23, 2:47 PM CDT, 3 hours 41 minutes earlier.

Area forecast discussion, May 23, 2:47 PM CDT, 3 hours 41 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
247 PM CDT Wed May 23 2018

.DISCUSSION...
Isolated to scattered showers and thunderstorms continue this
Afternoon across eastern Oklahoma and western Arkansas in
the deep moisture plume in association with a weak mid-level
shortwave. Some of the storms have become strong this afternoon
with wind gusts approaching 50 mph. Locally heavy rainfall
has also been a concern due to the slow movement of the storms
with some locations recording around 1 inch of rain in less than
an hours time. Isolated to scattered showers and thunderstorms are
expected to persist into the early evening hours before diminishing.

Will once again see isolated to scattered showers and thunderstorms
across the area on Thursday as the same scenario plays out across
eastern Oklahoma and western Arkansas.

On Friday, we will see the upper level flow become more northwesterly
with a weak shortwave bringing chances of showers and thunderstorms to the
area Friday into Friday evening.

An upper level ridge builds over the region during the Holiday weekend
with limited chances of showers and thunderstorms. As of now it looks
like any system moving into the Southern United States from the Gulf of
Mexico will mainly influence areas of east of the Tulsa CWA.

Unseasonably warm conditions are expected to continue into next week
with Sunday expected to be the hottest day.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   68  88  69  91 /  20  40  10  20
FSM   68  88  68  92 /  30  50  20  20
MLC   66  87  68  91 /  30  40  10  10
BVO   66  87  67  91 /  20  30  10  30
FYV   66  84  66  87 /  30  50  20  30
BYV   65  84  64  87 /  30  50  20  40
MKO   67  86  68  90 /  30  50  10  20
MIO   66  85  67  89 /  30  50  10  30
F10   66  87  67  91 /  30  50  10  10
HHW   68  89  69  92 /  30  30  10  10

&&

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

LONG TERM....10

Hazardous weather outlook, May 23, 5:20 PM CDT, 1 hour 8 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
520 PM CDT Wed May 23 2018

ARZ001-002-010-011-019-020-029-OKZ049-053>076-241030-
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-
520 PM CDT Wed May 23 2018

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...Late Afternoon and Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Ongoing.

HEAVY RAIN.
	RISK...Limited.
    AREA...Eastern Oklahoma and Northwest Arkansas.
    ONSET...Ongoing.

DISCUSSION...
Ongoing showers and thunderstorms across parts of Eastern Oklahoma
and Northwest Arkansas will remain possible into the early evening
hours. The stronger storms will be capable of becoming severe with
locally damaging winds and small size hail possible. Movement of
these storms continues to be slow going...which will allow for
periods of heavy rainfall which could create localized areas of
flash flooding. All of this activity is expected to weaken during
the evening hours with the loss of daytime heating.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Local Spotter Activation May Be Needed.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
THURSDAY THROUGH SATURDAY...Thunderstorm Potential.
SUNDAY...No Hazards.
MONDAY AND TUESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
There will be a limited threat for thunderstorms for the next
several days across Eastern Oklahoma and Northwest Arkansas.
Storms will tend to form at peak heating in the afternoon and
diminish shortly after sunset with the loss of daytime heating.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, May 23, 5:54 PM CDT, 34 minutes before

Special Weather Statement
National Weather Service Tulsa OK
554 PM CDT WED MAY 23 2018

OKZ053-232330-
Choctaw OK-
554 PM CDT WED MAY 23 2018

...SIGNIFICANT WEATHER ADVISORY FOR CHOCTAW COUNTY UNTIL 630 PM
CDT...

At 554 PM CDT, strong thunderstorms were located along a line
extending from 12 miles south of Soper to 7 miles northeast of Fort
Towson. Movement was west at 5 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations in or near the path include...
Hugo...                           Fort Towson...
Sawyer...                         Soper...
Goodland...                       Messer...
Hugo Lake State Park...           Raymond Gary State Park...
Grant...                          Ord...
Fallon...                         Swink...
Frogville...                      Huskey...
Gay...                            Apple...

LAT...LON 3388 9554 3393 9556 3394 9560 3389 9569
      3390 9575 3387 9577 3387 9584 3395 9594
      3398 9594 3416 9530 3416 9516 3394 9516
      3396 9523 3389 9526 3390 9526 3391 9527
      3387 9529 3389 9533 3387 9539
TIME...MOT...LOC 2254Z 099DEG 5KT 3386 9573 3408 9515

Special weather statement, May 23, 5:59 PM CDT, 29 minutes before

Special Weather Statement
National Weather Service Tulsa OK
559 PM CDT WED MAY 23 2018

OKZ060-064-232330-
Tulsa OK-Creek OK-
559 PM CDT WED MAY 23 2018

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL CREEK AND
SOUTHEASTERN TULSA COUNTIES UNTIL 630 PM CDT...

At 559 PM CDT, a strong thunderstorm was located near Jenks, moving
north at 5 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations in or near the path include...
Tulsa...                          Broken Arrow...
Sand Springs...                   Bixby...
Jenks...                          Glenpool...
Kiefer...                         Jenks Riverside Airport...
Gray...

This includes Interstate 44 between mile markers 212 and 229.

LAT...LON 3590 9585 3591 9607 3614 9613 3614 9580
TIME...MOT...LOC 2259Z 179DEG 5KT 3599 9597

Local storm report, May 23, 6:01 PM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
601 PM CDT WED MAY 23 2018

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

0429 PM     TSTM WND DMG     5 WSW CATOOSA           36.15N 95.82W
05/23/2018                   TULSA              OK   NWS EMPLOYEE

            SEVERAL LARGE LIMBS DOWN NEAR 142ND AND 11TH STREET

&&

SFP

Special weather statement, May 23, 6:13 PM CDT, 15 minutes before

Special Weather Statement
National Weather Service Tulsa OK
613 PM CDT WED MAY 23 2018

OKZ071-232345-
McIntosh OK-
613 PM CDT WED MAY 23 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MCINTOSH COUNTY
UNTIL 645 PM CDT...

At 613 PM CDT, a strong thunderstorm was located near Vivian, moving
north at 5 mph.

Dime size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations in or near the path include...
Stidham...                        Vivian...
Raiford...

LAT...LON 3536 9591 3542 9566 3525 9561 3522 9568
      3519 9578 3520 9579 3519 9583
TIME...MOT...LOC 2313Z 159DEG 6KT 3528 9575

Special weather statement, May 23, 6:23 PM CDT, 5 minutes before

Special Weather Statement
National Weather Service Tulsa OK
623 PM CDT WED MAY 23 2018

OKZ060-067-240000-
Tulsa OK-Wagoner OK-
623 PM CDT WED MAY 23 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WAGONER AND
SOUTHEASTERN TULSA COUNTIES UNTIL 700 PM CDT...

At 623 PM CDT, strong thunderstorms were located along a line
extending from 3 miles east of Jenks to 2 miles west of Stonebluff.
Movement was northeast at 15 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations in or near the path include...
Tulsa...                          Broken Arrow...
Bixby...                          Jenks...
Glenpool...                       Coweta...
Stonebluff...                     Leonard...
Choska...

LAT...LON 3613 9582 3583 9557 3583 9564 3586 9565
      3586 9593 3599 9602
TIME...MOT...LOC 2323Z 224DEG 11KT 3602 9590 3587 9578

Local storm report, May 23, 6:27 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
627 PM CDT WED MAY 23 2018

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

0605 PM     TSTM WND DMG     2 WNW BIXBY             35.95N 95.92W
05/23/2018                   TULSA              OK   TRAINED SPOTTER

            TREE LIMB AND FENCE DAMAGED BY THUNDERSTORM WINDS.

&&

JDS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 1:52 PM CDT	Special Weather Statement	TSA	Washington	23 min
May 23, 2:12 PM CDT	Special Weather Statement	TSA	Nowata	48 min
May 23, 2:22 PM CDT	Areal Flood Advisory	TSA	Nowata, Osage, Washington	113 min
May 23, 3:38 PM CDT	Special Weather Statement	TSA	Tulsa	37 min
May 23, 4:05 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	40 min
May 23, 4:21 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	24 min
May 23, 4:47 PM CDT	Areal Flood Advisory	TSA	Tulsa	118 min
May 23, 4:50 PM CDT	Special Weather Statement	TSA	Tulsa	40 min
May 23, 4:56 PM CDT	Special Weather Statement	TSA	Okmulgee	49 min
May 23, 5:01 PM CDT	Special Weather Statement	TSA	Sequoyah	29 min
May 23, 5:11 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	49 min
May 23, 5:14 PM CDT	Special Weather Statement	TSA	Okmulgee	31 min
May 23, 5:32 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee, Tulsa	18 min
May 23, 5:54 PM CDT	Special Weather Statement	TSA	Choctaw	36 min
May 23, 5:55 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	24 min
May 23, 5:59 PM CDT	Special Weather Statement	TSA	Tulsa	31 min
May 23, 6:04 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	7 min
May 23, 6:13 PM CDT	Special Weather Statement	TSA	McIntosh	32 min
May 23, 6:23 PM CDT	Special Weather Statement	TSA	Tulsa	37 min
May 23, 6:46 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	44 min
May 23, 6:49 PM CDT	Special Weather Statement	TSA	McIntosh	26 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018 Every severe thunderstorm warning in 2018

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.