Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 307, NWS Tulsa, OK

August 30, 20199 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 30, 2019, 3:15 AM CDT for 9 counties in Oklahoma. It was in force for 45 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: Aug 30, 2019, 3:15 AM CDT (08:15 UTC)
Expired: Aug 30, 2019, 4:00 AM CDT
In force: 45 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Creek County, OK, Mayes County, OK, Nowata County, OK, Osage County, OK, Pawnee County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 70 km from the middle of the area, began a volume at 08:15 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
Aug 30, 3:45 AM CDT	TSTM WND DMG	2 E Tulsa, OK	2 INCH TREE BRANCH FOUND SNAPPED NEAR UNIVERISTY OF TULSA. TIME IS ESTIMATED FROM RADAR.

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 30 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 00:00Z, 8.3 hours before the alert went out and 166 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: 3759 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1242 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

104 
WUUS54 KTSA 300815
SVRTSA
OKC037-097-105-113-117-131-143-145-147-300900-
/O.NEW.KTSA.SV.W.0307.190830T0815Z-190830T0900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
315 AM CDT Fri Aug 30 2019

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Rogers County in northeastern Oklahoma...
  Southern Osage County in northeastern Oklahoma...
  Northern Creek County in northeastern Oklahoma...
  Mayes County in northeastern Oklahoma...
  Southern Washington County in northeastern Oklahoma...
  Southwestern Nowata County in northeastern Oklahoma...
  Northern Wagoner County in northeastern Oklahoma...
  Pawnee County in northeastern Oklahoma...
  Tulsa County in northeastern Oklahoma...

* Until 400 AM CDT.

* At 314 AM CDT, severe thunderstorms were located along a line
  extending from 4 miles north of New Alluwe to near Vera to 2 miles
  north of Skedee, moving southeast at 55 mph.

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

  SOURCE...Radar indicated. At 305 AM, the Oklahoma Mesonet station 
           2 miles south of Wynona reported a 62 mph wind gust.

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

* Locations in or near the path include...
  Tulsa...                          Broken Arrow...
  Sand Springs...                   Claremore...
  Pawhuska...                       Pawnee...
  Pryor...                          Owasso...
  Bixby...                          Jenks...
  Coweta...                         Pryor Creek...
  Skiatook...                       Catoosa...
  Collinsville...                   Verdigris...
  Hominy...                         Cleveland...
  Mannford...                       Chouteau...

This includes Interstate 44 between mile markers 212 and 272.
 
LAT...LON 3669 9616 3667 9582 3660 9533 3651 9533
      3651 9524 3626 9500 3623 9501 3600 9539
      3602 9662 3616 9662 3616 9682 3624 9682
      3625 9692 3633 9693 3634 9703 3651 9703
      3658 9689 3660 9692 3659 9705 3666 9706
TIME...MOT...LOC 0814Z 315DEG 49KT 3668 9550 3642 9588 3641 9671 

HAIL...0.88IN
WIND...60MPH
 
$$

Lacy

2 follow-up statements

034 
WWUS54 KTSA 300833
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
333 AM CDT Fri Aug 30 2019

OKC037-097-105-113-117-131-143-145-147-300900-
/O.CON.KTSA.SV.W.0307.000000T0000Z-190830T0900Z/
Rogers OK-Osage OK-Creek OK-Mayes OK-Washington OK-Nowata OK-
Wagoner OK-Pawnee OK-Tulsa OK-
333 AM CDT Fri Aug 30 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM CDT
FOR ROGERS...SOUTHERN OSAGE...NORTHERN CREEK...MAYES...SOUTHERN
WASHINGTON...SOUTHWESTERN NOWATA...NORTHERN WAGONER...PAWNEE AND
TULSA COUNTIES...

At 333 AM CDT, severe thunderstorms were located along a line
extending from near Chelsea to 2 miles northeast of Owasso to 3 miles
north of Maramec, moving southeast at 45 mph.

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

SOURCE...Radar indicated.

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

Locations in or near the path include...
Tulsa...                          Broken Arrow...
Sand Springs...                   Claremore...
Pawnee...                         Pryor...
Owasso...                         Bixby...
Jenks...                          Coweta...
Pryor Creek...                    Skiatook...
Catoosa...                        Collinsville...
Verdigris...                      Hominy...
Cleveland...                      Mannford...
Chouteau...                       Chelsea...

This includes Interstate 44 between mile markers 212 and 272.
 
LAT...LON 3660 9609 3667 9582 3660 9533 3651 9533
      3651 9524 3626 9500 3623 9501 3600 9539
      3602 9662 3616 9662 3616 9682 3624 9682
      3625 9692 3633 9693 3634 9703 3651 9703
      3658 9689 3657 9671 3656 9648 3656 9636
TIME...MOT...LOC 0833Z 322DEG 38KT 3656 9545 3630 9583 3629 9666 

HAIL...0.88IN
WIND...60MPH
 
$$

Lacy

185 
WWUS54 KTSA 300854
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
354 AM CDT Fri Aug 30 2019

OKC037-097-105-113-117-131-143-145-147-300903-
/O.EXP.KTSA.SV.W.0307.000000T0000Z-190830T0900Z/
Rogers OK-Osage OK-Creek OK-Mayes OK-Washington OK-Nowata OK-
Wagoner OK-Pawnee OK-Tulsa OK-
354 AM CDT Fri Aug 30 2019

...THE SEVERE THUNDERSTORM WARNING FOR ROGERS...SOUTHERN OSAGE...
NORTHERN CREEK...MAYES...SOUTHERN WASHINGTON...SOUTHWESTERN NOWATA...
NORTHERN WAGONER...PAWNEE AND TULSA COUNTIES WILL EXPIRE AT 400 AM
CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However gusty 
winds 50 to 55 mph and heavy rain are still possible with these 
thunderstorms.

LAT...LON 3660 9609 3667 9582 3660 9533 3651 9533
      3651 9524 3626 9500 3623 9501 3600 9539
      3602 9662 3616 9662 3616 9682 3624 9682
      3625 9692 3633 9693 3634 9703 3651 9703
      3658 9689 3657 9671 3656 9648 3656 9636
TIME...MOT...LOC 0853Z 315DEG 49KT 3638 9523 3613 9561 3612 9644 

$$

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 Aug 29, 11:12 PM CDT, 4 hours 3 minutes earlier.

Area forecast discussion, Aug 29, 11:12 PM CDT, 4 hours 3 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
1112 PM CDT Thu Aug 29 2019

.DISCUSSION...

The discussion regarding the 06Z TAF forecast can be found below.

&&

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.
The main concern for this forecast will be convective timing at
all locations. Convective complex will sweep across the region
late tonight into Friday morning. Tempo groups with the most
favored time window were used at all sites, with the worst
conditions expected at the NE OK sites where the stronger storms
are expected before gradually weakening with S and E extent. MVFR
and even IFR conditions are possible with the storms. Activity
tapers off tomorrow afternoon and a quiet evening is expected as
well.

Lacy

&&

.PREV DISCUSSION... /Issued 940 PM CDT Thu Aug 29 2019/

DISCUSSION...
Severe storms are ongoing across parts of northern and western
Kansas as well as northern and western portions of Missouri. As
always, it will be interesting to see the evolution of the
overnight MCS as it progresses across Kansas and eventually into
northeast Oklahoma. Evening sounding at TOP sampled CAPE values in
the 4000-5000 j/kg range, so plenty of instability to work with
tonight. Still expecting a forward propagating MCS to enter
northeast Oklahoma sometime after 06-07z, given current southeast
speed around 30-35kt. PW values over 1.5" will support heavy
rainfall rates, although the system looks progressive. More rain
is expected Friday night into Saturday morning, and that will
enhance flash flood risk through the early part of the weekend.

Current forecast is on track. Have just updated hourly and cloud
trends.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   73  86  70  84 /  70  80  40  50
FSM   71  86  69  86 /  20  60  20  40
MLC   74  88  71  85 /  10  60  20  40
BVO   71  81  67  82 /  80  80  50  60
FYV   69  79  66  81 /  40  80  30  40
BYV   69  81  65  81 /  40  80  30  40
MKO   72  85  69  83 /  50  80  30  40
MIO   70  81  67  82 /  80  80  40  50
F10   72  88  70  83 /  40  70  30  40
HHW   73  90  71  90 /  10  50  20  30

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...Flash Flood Watch from 4 AM CDT Friday through Friday afternoon
     for OKZ054>061-064.

AR...None.
&&

AVIATION.....30

Hazardous weather outlook, Aug 29, 4:42 PM CDT, 10 hours 33 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
442 PM CDT Thu Aug 29 2019

ARZ001-002-010-011-019-020-029-OKZ049-053>076-301030-
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-
442 PM CDT Thu Aug 29 2019

...FLASH FLOOD WATCH IN EFFECT TONIGHT THROUGH FRIDAY AFTERNOON...

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

.DAY ONE...This afternoon and Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Northeast Oklahoma.
	ONSET...After 3 AM.

FLASH FLOOD.
	RISK...Limited.
	AREA...Northeast Oklahoma.
	ONSET...After 3 AM.

HEAVY RAIN.
	RISK...Limited.
	AREA...Northeast Oklahoma.
	ONSET...After 3 AM.

DANGEROUS HEAT.
	RISK...Limited.
	AREA...Eastern Oklahoma into far west central Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Isolated showers are possible this afternoon, with a thunderstorm
possible as well, with the best chance for areas in southeast
Oklahoma. Otherwise, heat index values will make it feel like it's
near 100 degrees in some locations through early evening.

Showers and thunderstorms will develop tonight along a cold front
located across southern Nebraska. These thunderstorms will move
toward Oklahoma after midnight, with the main threat of heavy rain
and flash flooding. Given the moist airmass in place, there will
be the potential for 1 to 3 inches of rain through Friday
afternoon, with locally higher amounts. Flash flooding will be
possible in low lying areas. Isolated damaging wind gusts will
also be possible with the strongest storms.

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

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
FRIDAY...Thunderstorm Potential...Heavy Rain Potential.
SATURDAY...Thunderstorm Potential.
SUNDAY through WEDNESDAY...No Hazards.

EXTENDED DISCUSSION...
The complex of storms will continue into Friday morning, with the
threat of heavy rainfall continuing across mainly northeast
Oklahoma. The threat of storms will shift to the south during the
afternoon. Another round of storms will be possible mainly across
northeast Oklahoma and northwest Arkansas Friday night into
Saturday.

weather.gov/tulsa contains additional information.

CORFIDI

In the hours before

Special weather statement, Aug 30, 1:23 AM CDT, 1 hour 52 minutes before

Special Weather Statement
National Weather Service Tulsa OK
123 AM CDT Fri Aug 30 2019

OKZ054-300715-
Osage OK-
123 AM CDT Fri Aug 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN OSAGE COUNTY UNTIL
215 AM CDT...

At 123 AM CDT, strong thunderstorms were located along a line
extending from 3 miles east of Latham to near Burden to 6 miles south
of Winfield to 2 miles northeast of South Haven to 7 miles northwest
of Caldwell. Movement was southeast at 40 mph.

Penny size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations in or near the path include...
Shidler...                        Burbank...
Elgin...                          Grainola...
Foraker...                        Pearsonia...
Southern Kaw Lake...              Webb City...
Apperson...

LAT...LON 3700 9623 3687 9633 3672 9658 3661 9697
      3662 9705 3668 9706 3670 9705 3668 9694
      3675 9689 3674 9683 3677 9682 3678 9675
      3700 9675
TIME...MOT...LOC 0623Z 324DEG 34KT 3754 9658 3734 9674 3718 9699 3708
9738 3711 9770

Lacy

Special weather statement, Aug 30, 2:11 AM CDT, 1 hour 4 minutes before

Special Weather Statement
National Weather Service Tulsa OK
211 AM CDT Fri Aug 30 2019

OKZ054>056-059-300800-
Osage OK-Pawnee OK-Nowata OK-Washington OK-
211 AM CDT Fri Aug 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR OSAGE...WASHINGTON...NORTHWESTERN
NOWATA AND NORTHWESTERN PAWNEE COUNTIES UNTIL 300 AM CDT...

At 210 AM CDT, strong thunderstorms were located along a line
extending from 9 miles northeast of Sedan to 2 miles northeast of
Elgin to 4 miles east of Foraker to Kaw City to 3 miles north of
Tonkawa. Movement was southeast at 40 mph.

Penny size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations in or near the path include...
Bartlesville...                   Pawhuska...
Hominy...                         Dewey...
Fairfax...                        Barnsdall...
South Coffeyville...              Copan...
Shidler...                        Wynona...
Ochelata...                       Ralston...
Lenapah...                        Burbank...
Wann...                           Elgin...
Grainola...                       Foraker...
Bigheart...                       Bartlesville Municipal Airport...

These storms 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 3700 9550 3667 9575 3651 9601 3641 9639
      3636 9701 3638 9703 3651 9703 3655 9690
      3658 9689 3660 9692 3659 9705 3668 9706
      3670 9703 3668 9694 3675 9689 3674 9683
      3677 9682 3678 9675 3700 9675
TIME...MOT...LOC 0710Z 312DEG 37KT 3723 9608 3702 9624 3687 9649 3676
9687 3673 9731

Lacy

Local storm report, Aug 30, 2:29 AM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
229 AM CDT FRI AUG 30 2019

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

0219 AM     TSTM WND GST     8 ESE FORAKER           36.83N 96.43W
08/30/2019  M64.00 MPH       OSAGE              OK   MESONET

            MEASURED AT FORAKER MESONET SITE.

&&

CKH

Local storm report, Aug 30, 3:13 AM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
313 AM CDT FRI AUG 30 2019

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

0305 AM     TSTM WND GST     2 S WYNONA              36.52N 96.33W
08/30/2019  M62 MPH          OSAGE              OK   MESONET

            MEASURED AT WYNONA MESONET SITE.

&&

CKH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 1:23 AM CDT	Special Weather Statement	TSA	Osage	52 min
Aug 30, 2:11 AM CDT	Special Weather Statement	TSA	Osage, Washington	49 min
Aug 30, 2:13 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Pawnee, Washington	47 min
Aug 30, 2:48 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Washington	42 min
Aug 30, 2:52 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers, Washington	38 min
Aug 30, 3:28 AM CDT	Special Weather Statement	TSA	Craig, Delaware, Ottawa	62 min
Aug 30, 3:53 AM CDT	Special Weather Statement	TSA	Creek, Mayes, Pawnee, Rogers, Tulsa, Wagoner	52 min
Aug 30, 4:14 AM CDT	Special Weather Statement	TSA	Adair, Cherokee, Delaware	46 min
Aug 30, 4:17 AM CDT	Special Weather Statement	TSA	Creek, Muskogee, Okfuskee, Okmulgee, Wagoner	43 min
Aug 30, 4:53 AM CDT	Special Weather Statement	TSA	Haskell, McIntosh	52 min
Aug 30, 5:48 AM CDT	Special Weather Statement	TSA	Haskell, Latimer, LeFlore, Pittsburg	42 min
Aug 30, 6:28 AM CDT	Special Weather Statement	TSA	Haskell, Latimer, LeFlore, Pittsburg, Sequoyah	47 min
Aug 30, 6:59 AM CDT	Special Weather Statement	TSA	Pushmataha	46 min
Aug 30, 7:49 AM CDT	Special Weather Statement	TSA	Pushmataha	41 min
Aug 30, 9:43 AM CDT	Areal Flood Advisory	TSA	Creek, McIntosh, Okfuskee, Okmulgee	2 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2019 Every severe thunderstorm warning in 2019

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.