Alert archive / Oklahoma / Special Weather Statements in 2018

Special Weather Statement, NWS Tulsa, OK

May 20, 2018Muskogee County, Oklahoma

NWS Tulsa, OK issued this special weather statement at May 20, 2018, 3:48 AM CDT for Muskogee County, Oklahoma. It was in force for 27 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 20, 2018, 3:48 AM CDT (08:48 UTC)
Expired: May 20, 2018, 4:15 AM CDT
In force: 27 min
Issued by: NWS Tulsa, OK

County Muskogee County, OK

The radar

The Tulsa radar (KINX), 56 km from the middle of the area, began a volume at 08:51 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.8 hours before the alert went out and 183 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: 1239 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1638 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 10.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 20, 3:48 AM CDT, 0 minutes earlier.

Area forecast discussion, May 20, 3:48 AM CDT, 0 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
348 AM CDT Sun May 20 2018

.DISCUSSION...
Large MCS is ongoing across much of Oklahoma and portions of west
Texas. This system has left a large outflow boundary extending
from Midland to south of Abilene. Multiple outflow boundaries
exist across eastern Oklahoma as well, as storms continue to form
within the low level jet axis. Wind gusts from the OK mesonet
have been sub-severe so far overnight, generally in the 40 to 50
mph range. The highest chance for storms will be this morning
across eastern Oklahoma, with diminishing chances by tonight.

Monday will feel more comfortable as some drier air works into the
region behind the cold front. Southwest flow aloft will persist
into at least mid week, which will bring low end chances for
showers and storms each day. Overall severe potential looks low
for the next few days.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   80  63  84  66 /  60  20  20  10
FSM   85  67  87  68 /  40  30  30  10
MLC   79  62  86  65 /  70  40  30  10
BVO   76  58  83  63 /  60  20  10  10
FYV   80  62  82  62 /  40  30  30  10
BYV   81  64  82  63 /  40  20  30  10
MKO   77  63  84  66 /  60  40  30  10
MIO   79  62  83  64 /  60  20  20  10
F10   79  63  83  66 /  70  20  20  10
HHW   84  67  87  67 /  50  40  30  10

&&

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

LONG TERM....06

CORFIDI

Hazardous weather outlook, May 19, 5:07 PM CDT, 10 hours 41 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
507 PM CDT Sat May 19 2018

ARZ001-002-010-011-019-020-029-OKZ049-053>076-201015-
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-
507 PM CDT Sat May 19 2018

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

.DAY ONE...Today and Tonight.
TORNADO.
	RISK...Limited.
	AREA...Along Interstate 44 in northeast Oklahoma.
	ONSET...Through mid evening.

SEVERE THUNDERSTORM.
	RISK...Elevated.
	AREA...Primarily Eastern Oklahoma.
	ONSET...Ongoing...continuing into overnight hours.

DISCUSSION...
Severe storms across far northeast Oklahoma have recently
weakened and moved north into Kansas.  Additional storms
are developing across north central Oklahoma north of
a strong outflow boundary.  These storms will pose mainly
periodic chances of large hail as they spread eastward
across northeast Oklahoma.  Should any storm develop along
or south of the outflow boundary it would pose a more
substantial severe weather risk.

Through the late evening and overnight hours the focus
will be toward storms moving eastward across Oklahoma.
These storms may spread into eastern Oklahoma after 10 PM
and maintain some risk of severe weather, primarily with
locally damaging winds.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network Possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.
SUNDAY through FRIDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Thunderstorm chances will persist daily through next
week, however any severe weather risk looks to remain
isolated as winds aloft remain light.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, May 20, 2:17 AM CDT, 1 hour 31 minutes before

Special Weather Statement
National Weather Service Tulsa OK
217 AM CDT SUN MAY 20 2018

OKZ065-200745-
Okfuskee OK-
217 AM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR OKFUSKEE COUNTY UNTIL 245 AM
CDT...

At 217 AM CDT, strong thunderstorms were located along a line
extending from near Little to 5 miles south of Cromwell to 3 miles
east of Holdenville. Movement was northeast at 35 mph.

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

Locations in or near the path include...
Okemah...                         Boley...
Weleetka...                       Paden...
Bearden...                        Castle...
Clearview...                      Welty...
Pharoah...                        Mason...

This includes Interstate 40 in Oklahoma between mile markers 212 and
231.

LAT...LON 3564 9648 3564 9640 3557 9619 3555 9619
      3555 9614 3554 9609 3538 9609 3538 9598
      3529 9598 3529 9644 3546 9644 3546 9647
      3543 9650 3545 9655 3544 9657 3540 9653
      3539 9655 3541 9658 3540 9662 3550 9663
TIME...MOT...LOC 0717Z 227DEG 32KT 3533 9668 3526 9645 3508 9633

Lacy

Special weather statement, May 20, 2:49 AM CDT, 59 minutes before

Special Weather Statement
National Weather Service Tulsa OK
249 AM CDT SUN MAY 20 2018

OKZ073-075-200815-
Pittsburg OK-Latimer OK-
249 AM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN LATIMER AND SOUTHEASTERN
PITTSBURG COUNTIES UNTIL 315 AM CDT...

At 248 AM CDT, a strong thunderstorm was located 4 miles southwest of
Higgins, moving north at 40 mph.

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

Locations in or near the path include...
Wilburton...                      Hartshorne...
Higgins...                        Robbers Cave State Park...
Haileyville...                    Gowen...
Dow...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3471 9562 3506 9561 3506 9528 3468 9541
TIME...MOT...LOC 0748Z 188DEG 34KT 3477 9551

Lacy

Special weather statement, May 20, 2:58 AM CDT, 50 minutes before

Special Weather Statement
National Weather Service Tulsa OK
258 AM CDT SUN MAY 20 2018

OKZ064-066-200830-
Okmulgee OK-Creek OK-
258 AM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL CREEK AND NORTHERN
OKMULGEE COUNTIES UNTIL 330 AM CDT...

At 258 AM CDT, strong thunderstorms were located along a line
extending from 3 miles east of Welty to 2 miles southeast of Okmulgee
State Park. Movement was north at 25 mph.

Wind gusts 40 to 50 mph will be possible with these storms.

Locations in or near the path include...
Okmulgee...                       Bristow...
Beggs...                          Slick...
Preston...                        Okmulgee State Park...
Bald Hill...                      Liberty...
Hectorville...

This includes Interstate 44 between mile markers 190 and 193.

LAT...LON 3586 9642 3585 9577 3584 9577 3554 9593
      3555 9609 3555 9619 3564 9619 3564 9640
TIME...MOT...LOC 0758Z 194DEG 21KT 3561 9634 3559 9603

Lacy

Special weather statement, May 20, 3:19 AM CDT, 29 minutes before

Special Weather Statement
National Weather Service Tulsa OK
319 AM CDT SUN MAY 20 2018

OKZ060-064-066-067-200845-
Tulsa OK-Okmulgee OK-Wagoner OK-Creek OK-
319 AM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL CREEK...NORTHWESTERN
WAGONER...NORTHEASTERN OKMULGEE AND SOUTHEASTERN TULSA COUNTIES UNTIL
345 AM CDT...

At 317 AM CDT, a gust front was surging north into southern Tulsa
county, and may also affect portions of western Wagoner and far
eastern Creek counties.

Wind gusts up to 50 mph will be possible with this gust front.

Locations in or near the path include...
Tulsa...                          Broken Arrow...
Sand Springs...                   Bixby...
Sapulpa...                        Jenks...
Glenpool...                       Coweta...
Catoosa...                        Kiefer...
Mounds...                         Jenks Riverside Airport...
Oneta...                          Liberty...
Gray...                           Hectorville...
Leonard...

This includes Interstate 44 between mile markers 211 and 235.

LAT...LON 3616 9600 3617 9600 3616 9562 3615 9562
      3576 9581 3579 9608 3616 9615
TIME...MOT...LOC 0817Z 187DEG 34KT 3586 9593

Lacy

Special weather statement, May 20, 3:23 AM CDT, 25 minutes before

Special Weather Statement
National Weather Service Tulsa OK
323 AM CDT SUN MAY 20 2018

OKZ054-200900-
Osage OK-
323 AM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN OSAGE COUNTY UNTIL
400 AM CDT...

At 322 AM CDT, a strong thunderstorm was located near Hulah, moving
north at 10 mph. Other strong storms were located near Okesa as well.

Nickel size hail will be possible with these storms.

Locations in or near the path include...
Bartlesville...                   Osage Hills State Park...
Hulah...                          Okesa...
Bartlesville Municipal Airport... Wah Sha She State Park...

LAT...LON 3700 9600 3679 9600 3666 9604 3665 9621
      3700 9619
TIME...MOT...LOC 0822Z 196DEG 10KT 3690 9607

Lacy

Special weather statement, May 20, 3:48 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tulsa OK
348 AM CDT SUN MAY 20 2018

OKZ062-067-068-070-072-200915-
Muskogee OK-Sequoyah OK-Cherokee OK-Wagoner OK-Mayes OK-
348 AM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SEQUOYAH...
SOUTHWESTERN MAYES...EASTERN WAGONER...WESTERN CHEROKEE AND EASTERN
MUSKOGEE COUNTIES UNTIL 415 AM CDT...

At 348 AM CDT, a gust front was located along a line extending from
3 miles west of Wagoner to Porum. Movement was northeast at 30 mph.

Wind gusts up to 50 mph will be possible with this gust front.

Locations in or near the path include...
Muskogee...                       Wagoner...
Fort Gibson...                    Chouteau...
Warner...                         Vian...
Gore...                           Okay...
Webbers Falls...                  Hulbert...
Braggs...                         Tullahassee...
Greenleaf State Park...           Pumpkin Center...
Sequoyah State Park...            Lake Tenkiller State Park...
Keefeton...                       Summit...
Mazie...                          Lost City...

This includes Interstate 40 in Oklahoma between mile markers 276 and
296.

LAT...LON 3611 9515 3545 9495 3544 9502 3546 9503
      3546 9505 3543 9508 3539 9528 3551 9535
      3555 9535 3555 9537 3581 9552 3607 9546
      3608 9544 3614 9544 3630 9540
TIME...MOT...LOC 0848Z 218DEG 28KT 3596 9542 3535 9525

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 10:25 PM CDT	Severe Thunderstorm Warning	TSA	Osage	31 min
May 20, 12:58 AM CDT	Special Weather Statement	TSA	Kay	32 min
May 20, 1:12 AM CDT	Severe Thunderstorm Warning	TSA	Osage	48 min
May 20, 1:36 AM CDT	Special Weather Statement	TSA	Osage	24 min
May 20, 1:47 AM CDT	Special Weather Statement	TSA	Okfuskee	28 min
May 20, 1:50 AM CDT	Special Weather Statement	TSA	Osage	25 min
May 20, 2:02 AM CDT	Special Weather Statement	TSA	Pittsburg	28 min
May 20, 2:04 AM CDT	Special Weather Statement	TSA	Osage	26 min
May 20, 2:17 AM CDT	Special Weather Statement	TSA	Okfuskee	28 min
May 20, 2:36 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	39 min
May 20, 2:49 AM CDT	Special Weather Statement	TSA	Latimer	26 min
May 20, 2:58 AM CDT	Special Weather Statement	TSA	Okmulgee	32 min
May 20, 3:19 AM CDT	Special Weather Statement	TSA	Tulsa	26 min
May 20, 3:23 AM CDT	Special Weather Statement	TSA	Washington	37 min
May 20, 3:28 AM CDT	Areal Flood Advisory	TSA	Washington	3 hr
May 20, 3:41 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	38 min
May 20, 4:00 AM CDT	Areal Flood Advisory	TSA	Osage	3 hr
May 20, 4:14 AM CDT	Special Weather Statement	TSA	Cherokee, Mayes	31 min
May 20, 4:18 AM CDT	Special Weather Statement	TSA	Craig, Nowata	27 min
May 20, 4:40 AM CDT	Special Weather Statement	TSA	Craig, Delaware, Nowata, Ottawa	35 min
May 20, 4:54 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	51 min
May 20, 5:21 AM CDT	Special Weather Statement	TSA	Delaware	24 min
May 20, 8:17 AM CDT	River Flood Warning	TSA	Ottawa	30 hr
May 20, 2:48 PM CDT	Special Weather Statement	TSA	Pushmataha	42 min
May 20, 3:07 PM CDT	Special Weather Statement	TSA	Ottawa	23 min
May 20, 3:38 PM CDT	Special Weather Statement	TSA	Ottawa	37 min
May 20, 4:06 PM CDT	Special Weather Statement	TSA	Adair	24 min
May 20, 4:20 PM CDT	Special Weather Statement	TSA	Delaware	25 min
May 20, 6:02 PM CDT	Special Weather Statement	TSA	Adair	43 min

Nearby

Special Weather Statements in Oklahoma, 2018 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.