Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 326, NWS Tulsa, OK

May 27, 2017Ottawa County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 2017, 11:53 PM CDT for Ottawa County, Oklahoma. It was in force for 37 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, 2017, 11:53 PM CDT (04:53 UTC)
Expired: May 28, 2017, 12:30 AM CDT
In force: 37 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Ottawa County, OK

The radar

The Tulsa radar (KINX), 105 km from the middle of the area, began a volume at 04:56 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, 11:55 PM CDT	HAIL 1.5	Miami, 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 2 storm reports to this severe thunderstorm warning; the first came 2 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, 4:01 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 4.9 hours before the alert went out and 245 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: 582 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1070 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

873 
WUUS54 KTSA 280453
SVRTSA
OKC115-280530-
/O.NEW.KTSA.SV.W.0326.170528T0453Z-170528T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
1153 PM CDT SAT MAY 27 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northern Ottawa County in northeastern Oklahoma...

* Until 1230 AM CDT

* At 1153 PM CDT, a severe thunderstorm was located over Commerce, 
  moving northeast at 35 mph. another severe thunderstorm was 
  located southwest of peoria...moving northeast at 35 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 in or near the path include...
  Miami...                          Commerce...
  Quapaw...                         Treece...
  Picher...                         Ottawa...
  Peoria...                         Cardin...
  Twin Bridges State Park...        

This includes Interstate 44 between mile markers 303 and 324.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

&&

A tornado watch remains in effect until midnight CDT for northeastern
Oklahoma.

LAT...LON 3682 9462 3678 9488 3691 9500 3693 9500
      3700 9493 3700 9462
TIME...MOT...LOC 0453Z 231DEG 32KT 3691 9487 

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

69

2 follow-up statements

669 
WWUS54 KTSA 280504
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1204 AM CDT SUN MAY 28 2017

OKC115-280530-
/O.CON.KTSA.SV.W.0326.000000T0000Z-170528T0530Z/
Ottawa OK-
1204 AM CDT SUN MAY 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR NORTHEASTERN OTTAWA COUNTY...

At 1203 AM CDT, a severe thunderstorm was located over Quapaw, 
moving northeast at 30 mph. another severe thunderstorm was located 
near peoria...moving northeast at 30 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 in or near the path include...
Miami...                          Commerce...
Quapaw...                         Treece...
Picher...                         Ottawa...
Peoria...                         Cardin...

This includes Interstate 44 between mile markers 308 and 324.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

A tornado watch remains in effect until 200 AM CDT for northeastern
Oklahoma.

LAT...LON 3682 9462 3681 9481 3690 9490 3700 9487
      3700 9462
TIME...MOT...LOC 0503Z 239DEG 28KT 3695 9478 

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

69

871 
WWUS54 KTSA 280525
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1225 AM CDT SUN MAY 28 2017

OKC115-280535-
/O.EXP.KTSA.SV.W.0326.000000T0000Z-170528T0530Z/
Ottawa OK-
1225 AM CDT SUN MAY 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OTTAWA COUNTY
WILL EXPIRE AT 1230 AM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A severe thunderstorm watch remains in effect until 700 AM CDT for 
northeastern Oklahoma.

LAT...LON 3682 9462 3681 9481 3690 9490 3700 9487
      3700 9462
TIME...MOT...LOC 0525Z 231DEG 32KT 3707 9459 

$$

69

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 27, 8:48 PM CDT, 3 hours 5 minutes earlier.

Area forecast discussion, May 27, 8:48 PM CDT, 3 hours 5 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
848 PM CDT Sat May 27 2017

.DISCUSSION...
Severe threat continues across the entire area. Latest
mesoanalysis shows the synoptic front extending from far northeast
OK into western Oklahoma/TX panhandle. Another wind shift
boundary was located across northeast OK noted in mesonet and
radar data from Pryor/Tulsa/Oilton. Supercell in Okfuskee County
has recently been tornado warned and large hail/tornado potential
continues with this cell. The other strong storms are located in
south central OK and have been produced some large hail so far.

Have increased the hourly pops across the southern zones in
advance of the supercells approaching from south central Oklahoma.
Short term model guidance continue to show semi-discrete
supercells persisting for several hours. Until a more linear mode
develops, tornado threat will continue especially south of
Interstate 40.

Updates already sent.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   65  81  58  87 /  60  10   0   0
FSM   71  83  60  87 /  70  10   0   0
MLC   67  80  57  86 /  70  10   0   0
BVO   62  81  53  87 /  40  10   0  10
FYV   64  77  51  82 /  70  10   0   0
BYV   66  78  54  82 /  70  10   0   0
MKO   66  79  57  86 /  70  10   0   0
MIO   64  80  54  84 /  60  10   0  10
F10   66  80  57  86 /  60  10   0   0
HHW   71  81  61  87 /  80  20  10  10

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch until 7 AM CDT Sunday for OKZ049-053-067>076.

AR...Flood Watch until 7 AM CDT Sunday for ARZ001-002-010-011-019-020-
     029.

&&

SHORT TERM...06
AVIATION....30

CORFIDI

Hazardous weather outlook, May 27, 4:57 PM CDT, 6 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
457 PM CDT Sat May 27 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-281030-
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-
457 PM CDT Sat May 27 2017

...TORNADO WATCH IN EFFECT UNTIL MIDNIGHT FOR EASTERN OKLAHOMA
AND WESTERN ARKANSAS...

...SIGNIFICANT SEVERE WEATHER LIKELY TONIGHT WITH DESTRUCTIVE
WINDS AND LARGE HAIL WITH A FEW STRONG TORNADOES POSSIBLE...

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

.DAY ONE...This afternoon and Tonight.
TORNADO.
	RISK...Elevated.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Late afternoon.

SEVERE THUNDERSTORM.
	RISK...Critical.
	AREA...Eastern Oklahoma and western Arkansas.
    ONSET...Late afternoon.

	AREA AT GREATEST RISK...Along and north of Interstate 44 through early evening,
    then along and south of Interstate 44 tonight.

FLASH FLOOD.
	RISK...Limited.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Early evening.

HEAVY RAIN.
	RISK...Limited.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Early evening.

DANGEROUS HEAT.
	RISK...Limited.
	AREA...Eastern Oklahoma and Western Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Latest surface mesoanalysis shows boundary across far northeast
Oklahoma. OK mesonet observations and radar data suggest
convective towers are developing along a line from just north of
Vinita southwest toward central Osage County - near Pawhuska. We
are monitoring this area for first development this afternoon.

Elevated showers and storms are approaching from central Oklahoma
with a few lightning strikes noted. The cap has held strong to
this point but once the cap is breached, explosive storm
development is likely given extreme instability in place. All
modes of severe will be likely, including very large hail,
damaging wind gusts and tornadoes.

Eventually, storms will increase in coverage and likely
transition toward a damaging wind threat by mid to late evening as
they develop southeastward. Additionally, an axis of heavy
rainfall is likely from northwest Arkansas through eastern
Oklahoma. Recent heavy rainfall may allow for rapid onset flash
flooding in a few locations.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Regional Spotter Network has been activated.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
SUNDAY...Thunderstorm Potential.
MONDAY and TUESDAY...No Hazards.
WEDNESDAY through FRIDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Storms will begin to shift southeast of the region Sunday morning
with dry conditions on Monday and Tuesday. Low thunderstorm
chances return mid to late week, with limited additional severe
weather potential.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
A Tornado Watch is in effect through midnight for all of eastern
Oklahoma and western Arkansas. Initiation of storms is expected
within the next hour or so. The holiday weekend will provide
numerous outdoor exposures which will further increase the
potential for a rapid safety response. Outdoor activities may need
to be cancelled this evening, especially if you are unable to
quickly move indoors to a substantial shelter.

weather.gov/tulsa Contains additional information.

CORFIDI

In the hours before

Local storm report, May 27, 10:43 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1043 PM CDT SAT MAY 27 2017

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

0915 PM     HAIL             TULSA                   36.13N 95.92W
05/27/2017  E1.25 INCH       TULSA              OK   PUBLIC

            OWEN PARK IN DOWNTOWN TULSA.

&&

AEJ

Local storm report, May 27, 11:03 PM CDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1103 PM CDT SAT MAY 27 2017

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

1103 PM     HAIL             VINITA                  36.64N 95.15W
05/27/2017  E1.00 INCH       CRAIG              OK   AMATEUR RADIO

&&

AEJ

Local storm report, May 27, 11:08 PM CDT, 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1108 PM CDT SAT MAY 27 2017

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

1108 PM     HAIL             VINITA                  36.64N 95.15W
05/27/2017  E1.75 INCH       CRAIG              OK   EMERGENCY MNGR

&&

AEJ

Special weather statement, May 27, 11:15 PM CDT, 38 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1115 PM CDT SAT MAY 27 2017

ARZ002-010-011-019-020-280500-
Carroll AR-Madison AR-Washington AR-Franklin AR-Crawford AR-
1115 PM CDT SAT MAY 27 2017

...SIGNIFICANT WEATHER ADVISORY FOR MADISON...NORTHERN FRANKLIN...
NORTHERN CRAWFORD...SOUTHEASTERN CARROLL AND WASHINGTON COUNTIES
UNTIL MIDNIGHT CDT...

At 1115 PM CDT, strong thunderstorms were located along a line
extending from 6 miles northwest of Natural Dam to 8 miles north of
Fern to 5 miles southwest of Upper Buffalo Wilderness Area. Movement
was southeast at 20 mph.

Dime size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations in or near the path include...
Fayetteville...                   Springdale...
Huntsville...                     Cedarville...
Mountainburg...                   Natural Dam...
Farmington...                     Prairie Grove...
Elkins...                         West Fork...
Lincoln...                        Greenland...
Winslow...                        Chester...
St. Paul...                       Hindsville...
Wesley...                         Carrollton...
Rudd...                           Saint Paul...

This includes Interstate 49 between mile markers 27 and 70.

A tornado watch remains in effect until midnight CDT for northwestern
and west central Arkansas.

LAT...LON 3612 9348 3608 9348 3608 9345 3597 9345
      3595 9349 3588 9351 3588 9352 3576 9352
      3577 9370 3566 9370 3554 9445 3606 9453
      3620 9405 3627 9331 3612 9330
TIME...MOT...LOC 0415Z 334DEG 16KT 3571 9447 3576 9398 3586 9348

69

Local storm report, May 27, 11:25 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1125 PM CDT SAT MAY 27 2017

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

1105 PM     HAIL             3 N WHITE OAK           36.66N 95.26W
05/27/2017  E2.75 INCH       CRAIG              OK   EMERGENCY MNGR

&&

AEJ

Local storm report, May 27, 11:39 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1139 PM CDT SAT MAY 27 2017

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

1133 PM     HAIL             BLUEJACKET              36.80N 95.07W
05/27/2017  E2.50 INCH       CRAIG              OK   EMERGENCY MNGR

&&

JDS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:15 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	20 min
May 27, 7:27 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers	63 min
May 27, 7:43 PM CDT	Special Weather Statement	TSA	Creek	47 min
May 27, 7:50 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	55 min
May 27, 8:10 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	50 min
May 27, 8:26 PM CDT	Tornado Warning Tornado observed	TSA	Creek, Okfuskee	49 min
May 27, 8:33 PM CDT	Severe Thunderstorm Warning	TSA	Creek	30 min
May 27, 8:39 PM CDT	Special Weather Statement	TSA	Mayes	51 min
May 27, 8:48 PM CDT	Special Weather Statement	TSA	Tulsa	42 min
May 27, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	53 min
May 27, 8:55 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	35 min
May 27, 8:58 PM CDT	Tornado Warning	TSA	Okfuskee	47 min
May 27, 9:09 PM CDT	Areal Flood Advisory	TSA	Creek, Okfuskee, Okmulgee	3 hr
May 27, 9:11 PM CDT	Tornado Warning	TSA	Okfuskee	34 min
May 27, 9:14 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	46 min
May 27, 9:16 PM CDT	Special Weather Statement	TSA	Rogers	29 min
May 27, 9:21 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Wagoner	39 min
May 27, 9:26 PM CDT	Special Weather Statement	TSA	Tulsa	34 min
May 27, 9:39 PM CDT	Flash Flood Warning	TSA	Creek, Okfuskee	4 hr
May 27, 9:42 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes, Wagoner	63 min
May 27, 9:43 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	47 min
May 27, 9:46 PM CDT	Areal Flood Advisory	TSA	Delaware, Mayes	3 hr
May 27, 9:46 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Muskogee, Okfuskee, Okmulgee, Wagoner	44 min
May 27, 10:14 PM CDT	Special Weather Statement	TSA	Adair	46 min
May 27, 10:17 PM CDT	Special Weather Statement	TSA	Delaware	43 min
May 27, 10:23 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	37 min
May 27, 10:25 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg, Pushmataha	35 min
May 27, 10:32 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	43 min
May 27, 10:44 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Nowata, Ottawa, Rogers	61 min
May 27, 10:45 PM CDT	Areal Flood Advisory	TSA	Adair	3 hr
May 27, 10:48 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, McIntosh, Muskogee, Sequoyah	42 min
May 27, 11:09 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	51 min
May 27, 11:10 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg, Pushmataha	65 min
May 27, 11:19 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, LeFlore, Sequoyah	41 min
May 27, 11:40 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	35 min
May 28, 12:05 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	40 min
May 28, 12:37 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	38 min
May 28, 12:58 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	32 min
May 28, 1:15 AM CDT	Special Weather Statement	TSA	Osage	30 min
May 28, 1:27 AM CDT	Special Weather Statement	TSA	Creek	33 min
May 28, 1:34 AM CDT	Severe Thunderstorm Warning	TSA	Creek	41 min
May 28, 1:44 AM CDT	Special Weather Statement	TSA	Okfuskee	31 min
May 28, 2:01 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee	26 min
May 28, 2:23 AM CDT	Special Weather Statement	TSA	Choctaw	37 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every severe thunderstorm warning in 2017

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.