Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 219, NWS Tulsa, OK

May 10, 2017Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 10, 2017, 4:25 PM CDT for Osage County, Oklahoma. It was in force for 35 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 10, 2017, 4:25 PM CDT (21:25 UTC)
Expired: May 10, 2017, 5:00 PM CDT
In force: 35 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Osage County, OK

The radar

The Wichita radar (KICT), 116 km from the middle of the area, began a volume at 21:25 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 10, 4:35 PM CDT	HAIL 0.75	Shidler, OK	PEA TO DIME SIZED HAIL

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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, 9.4 hours before the alert went out and 195 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: 614 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 611 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

As transmitted.

717 
WUUS54 KTSA 102125
SVRTSA
OKC113-102200-
/O.NEW.KTSA.SV.W.0219.170510T2125Z-170510T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
425 PM CDT WED MAY 10 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  North central Osage County in northeastern Oklahoma...

* Until 500 PM CDT

* At 424 PM CDT, a severe thunderstorm was located near Shidler,
  moving northeast at 35 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 in or near the path include...
  Shidler...                        Burbank...
  Elgin...                          Grainola...
  Foraker...                        Pearsonia...
  Eastern Kaw Lake...               Webb City...
  Apperson...                       

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3700 9624 3695 9619 3665 9671 3676 9682
      3677 9682 3677 9679 3678 9679 3678 9675
      3687 9675 3700 9660
TIME...MOT...LOC 2124Z 229DEG 30KT 3678 9671 

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

Lacy

2 follow-up statements

227 
WWUS54 KTSA 102140
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
440 PM CDT WED MAY 10 2017

OKC113-102200-
/O.CON.KTSA.SV.W.0219.000000T0000Z-170510T2200Z/
Osage OK-
440 PM CDT WED MAY 10 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR NORTH CENTRAL OSAGE COUNTY...

At 439 PM CDT, a severe thunderstorm was located over Foraker, moving
northeast at 35 mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

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

Locations in or near the path include...
Elgin...                          Foraker...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3700 9624 3695 9619 3679 9658 3678 9663
      3680 9666 3681 9668 3683 9670 3686 9669
      3700 9660
TIME...MOT...LOC 2139Z 230DEG 31KT 3687 9656 

HAIL...1.25IN
WIND...60MPH
 
$$

Lacy

486 
WWUS54 KTSA 102142
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
442 PM CDT WED MAY 10 2017

OKC113-102200-
/O.CON.KTSA.SV.W.0219.000000T0000Z-170510T2200Z/
Osage OK-
442 PM CDT WED MAY 10 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR NORTH CENTRAL OSAGE COUNTY...

At 442 PM CDT, a severe thunderstorm was located near Foraker, 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...
Elgin...                          Foraker...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3700 9624 3695 9619 3682 9651 3681 9655
      3682 9659 3684 9662 3686 9662 3689 9661
      3700 9654
TIME...MOT...LOC 2142Z 229DEG 30KT 3689 9653 

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

Lacy

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 10, 3:24 PM CDT, 1 hour 1 minute earlier.

Area forecast discussion, May 10, 3:24 PM CDT, 1 hour 1 minute before

Area Forecast Discussion
National Weather Service Tulsa OK
324 PM CDT Wed May 10 2017

.DISCUSSION...
Main forecast concern continues to be thunderstorm chances through
Thursday night, including some strong to severe potential.

Thunderstorms are ongoing across eastern Oklahoma this afternoon in
association with a small upper level disturbance moving
northeastward into the area. Storms in northeast Oklahoma should
be the strongest of the evening, with one or two near severe
levels possible, due to locally higher instability. Farther to
the southwest, additional thunderstorms expected to develop
through the rest of the afternoon and into the evening in the
vicinity of the triple point may hold together long enough to move
northeastward into parts of northeast Oklahoma after midnight.

A lull in the coverage should occur tomorrow morning and perhaps
into early tomorrow afternoon. Thunderstorm coverage will again
increase by mid afternoon tomorrow, as instability increases with
the approach of the upper level low. Very large hail will be the
main severe weather threat, with damaging winds also a concern.
Tornado potential continues to be very limited, although local
enhancements to the wind field could lead to a very localized
threat. Thunderstorm potential will diminish Thursday night,
roughly from west to east, as the upper low begins to move east of
the area. Showers may linger into the daylight hours Friday,
mainly across western Arkansas, with dry weather likely to arrive
by the afternoon.

Dry weather will continue into the weekend, with near normal
temperatures Saturday and much warmer for Sunday. Above normal
temperatures will persist through most of next week. Low
thunderstorm chances will arrive for the early to middle of the
week, with increasing chances likely toward the latter half.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   68  80  57  74 /  50  60  60  10
FSM   66  81  59  76 /  20  80  70  30
MLC   66  81  57  74 /  20  70  50  10
BVO   64  78  55  74 /  50  70  60  10
FYV   66  76  54  69 /  30  80  80  30
BYV   66  77  55  69 /  30  70  80  40
MKO   66  78  57  73 /  30  80  60  20
MIO   66  77  55  71 /  50  70  70  20
F10   66  80  57  73 /  30  60  50  10
HHW   67  79  59  76 /  20  70  60  10

&&

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

LONG TERM....22

Hazardous weather outlook, May 10, 4:11 PM CDT, 14 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
411 PM CDT Wed May 10 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-111030-
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-
411 PM CDT Wed May 10 2017

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

.DAY ONE...Tonight.

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

DISCUSSION...
Thunderstorms are ongoing early this afternoon across parts of
central and eastern Oklahoma and will continue across the area
through mid evening. Most thunderstorms will remain below severe
levels, but a few may strengthen enough to produce hail to the
size of quarters and 60 mph wind gusts. The most likely area to
see an isolated severe thunderstorm will be along and north of
Interstate 44 in eastern Oklahoma and perhaps a small part of far
northwest Arkansas.

Additional thunderstorms developing this afternoon and evening to
the southwest may hold together long enough to move into parts of
northeast Oklahoma after midnight. Severe weather appears
unlikely with this activity at this time.

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

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THURSDAY...Severe Thunderstorm Potential...Heavy Rain Potential.
FRIDAY THROUGH MONDAY...No Hazards.
TUESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Thunderstorms on Thursday will be focused on the cold front and
upper level storm system that will move through the area during
the day and evening. Storms will increase in areal coverage
during the afternoon along the front, with the greatest coverage
expected to be across far eastern Oklahoma and northwest Arkansas
nearest the greatest instability. Any severe storm will be
capable of producing very large hail, as well as damaging winds.
The overall tornado threat appears to be very limited, though
nonzero. Severe weather potential will diminish by late evening as
the frontal boundary pushes east. However, thunderstorm chances
should linger through the overnight hours until the trailing upper
level system finally clears the area.

After a dry weekend with moderating temperatures, another upper
level storm system will move into the northwest United States and
increase thunderstorm chances for the Plains by early in the next
work week.

weather.gov/tulsa Contains additional information.

In the hours before

Special weather statement, May 10, 3:20 PM CDT, 1 hour 5 minutes before

Special Weather Statement
National Weather Service Tulsa OK
320 PM CDT WED MAY 10 2017

OKZ073-102045-
Pittsburg OK-
320 PM CDT WED MAY 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PITTSBURG COUNTY
UNTIL 345 PM CDT...

At 320 PM CDT, a strong thunderstorm was located 6 miles southwest of
Ashland, moving northeast at 40 mph.

Nickel size hail will be possible with this storm.

Locations in or near the path include...
Mcalester...                      Kiowa...
Savanna...                        Ashland...
Haywood...                        Arpelar...

LAT...LON 3489 9609 3505 9589 3484 9568 3468 9598
      3468 9609
TIME...MOT...LOC 2020Z 231DEG 35KT 3471 9616

Lacy

Special weather statement, May 10, 3:36 PM CDT, 49 minutes before

Special Weather Statement
National Weather Service Tulsa OK
336 PM CDT WED MAY 10 2017

OKZ065-066-102100-
Okmulgee OK-Okfuskee OK-
336 PM CDT WED MAY 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN OKMULGEE AND
SOUTHEASTERN OKFUSKEE COUNTIES UNTIL 400 PM CDT...

At 336 PM CDT, a strong thunderstorm was located 3 miles southwest of
Wetumka, moving northeast at 45 mph.

Nickel size hail will be possible with this storm.

Locations in or near the path include...
Henryetta...                      Weleetka...
Dewar...                          Clearview...
Pharoah...                        Bryant...

This includes Interstate 40 in Oklahoma between mile markers 223 and
242.

LAT...LON 3555 9617 3544 9588 3538 9595 3537 9598
      3534 9598 3529 9604 3529 9636
TIME...MOT...LOC 2036Z 215DEG 39KT 3521 9629

Lacy

Special weather statement, May 10, 3:46 PM CDT, 39 minutes before

Special Weather Statement
National Weather Service Tulsa OK
346 PM CDT WED MAY 10 2017

OKZ054-102115-
Osage OK-
346 PM CDT WED MAY 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL OSAGE COUNTY UNTIL
415 PM CDT...

At 346 PM CDT, a strong thunderstorm was located near Marland, moving
northeast at 30 mph.

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

Locations in or near the path include...
Southwestern Kaw Lake...

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 3670 9703 3668 9694 3673 9691 3675 9689
      3675 9685 3662 9672 3648 9699 3648 9700
      3649 9701 3652 9701 3655 9692 3655 9690
      3658 9689 3660 9692 3658 9698 3659 9705
      3660 9704 3668 9706
TIME...MOT...LOC 2046Z 231DEG 26KT 3653 9713

Lacy

Special weather statement, May 10, 4:00 PM CDT, 25 minutes before

Special Weather Statement
National Weather Service Tulsa OK
400 PM CDT WED MAY 10 2017

OKZ065-066-070-102130-
Muskogee OK-Okmulgee OK-Okfuskee OK-
400 PM CDT WED MAY 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MUSKOGEE...CENTRAL
OKMULGEE AND EAST CENTRAL OKFUSKEE COUNTIES UNTIL 430 PM CDT...

At 400 PM CDT, a strong thunderstorm was located 5 miles northeast of
Pharoah, moving northeast at 50 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations in or near the path include...
Okmulgee...                       Henryetta...
Haskell...                        Morris...
Schulter...                       Preston...
Okmulgee State Park...            Bald Hill...
Jamesville...                     Eram...

This includes Interstate 40 in Oklahoma between mile markers 230 and
236.

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 3586 9589 3586 9572 3580 9564 3579 9564
      3578 9563 3576 9557 3539 9605 3547 9620
TIME...MOT...LOC 2100Z 218DEG 45KT 3548 9606

Lacy

Special weather statement, May 10, 4:04 PM CDT, 21 minutes before

Special Weather Statement
National Weather Service Tulsa OK
404 PM CDT WED MAY 10 2017

OKZ073-102130-
Pittsburg OK-
404 PM CDT WED MAY 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN PITTSBURG COUNTY UNTIL
430 PM CDT...

At 403 PM CDT, a strong thunderstorm was located near Ashland, moving
northeast at 55 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations in or near the path include...
Mcalester...                      Krebs...
Savanna...                        Ashland...
Haywood...                        Scipio...
Arpelar...

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 3491 9609 3519 9583 3501 9558 3468 9601
      3468 9609
TIME...MOT...LOC 2103Z 221DEG 46KT 3475 9610

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 3:20 PM CDT	Special Weather Statement	TSA	Pittsburg	25 min
May 10, 3:36 PM CDT	Special Weather Statement	TSA	Okfuskee	24 min
May 10, 3:46 PM CDT	Special Weather Statement	TSA	Kay	29 min
May 10, 3:56 PM CDT	Severe Thunderstorm Warning	TSA	Osage	34 min
May 10, 4:00 PM CDT	Special Weather Statement	TSA	Okmulgee	30 min
May 10, 4:04 PM CDT	Special Weather Statement	TSA	Pittsburg	26 min
May 10, 4:27 PM CDT	Special Weather Statement	TSA	Kay	33 min
May 10, 5:03 PM CDT	Special Weather Statement	TSA	Pittsburg	27 min
May 10, 5:35 PM CDT	Areal Flood Advisory	TSA	Osage	3 hr
May 10, 5:48 PM CDT	Special Weather Statement	TSA	Ottawa	27 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.