Alert archive / Oklahoma / Special Weather Statements in 2019

Special Weather Statement, NWS Tulsa, OK

August 8, 2019Sequoyah County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Aug 8, 2019, 8:09 PM CDT for Sequoyah County, Oklahoma. It was in force for 51 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
Aug 8, 2019, 8:09 PM CDT (01:09 UTC)
Expired
Aug 8, 2019, 9:00 PM CDT
In force
51 min
Issued by
NWS Tulsa, OK

County Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 53 km from the middle of the area, began a volume at 01:11 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, 1.2 hours before the alert went out and 193 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-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2019-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 139 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2019-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
139 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
694 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Aug 8, 3:47 PM CDT, 4 hours 22 minutes earlier.

Area forecast discussion, Aug 8, 3:47 PM CDT, 4 hours 22 minutes before
Area Forecast Discussion
National Weather Service Tulsa OK
347 PM CDT Thu Aug 8 2019

.DISCUSSION...
Expansive area of clouds and rain has keep much of the area north
of Interstate 40 much cooler, with temps holding in the mid 70s to
lower 80s. Latest analysis places surface boundary from
Holdenville to Eufaula to around Fort Smith, or very near the I-40
corridor. South of the front, heat index values have climbed into
the 105 to near 110 degree range, and heat advisory will continue
through early this evening. Will hold off on heat advisory for
Friday pending development of overnight rain/storms and associated
outflow.

Across far northeast Oklahoma, mesonet and other surface
observations indicate that around 2-3 inches of rain fell this
morning with isolated amounts around 4 inches. Flash flood watch
has been extended through mid morning on Friday, and Cherokee and
Adair counties have been added to the existing watch.

The overall pattern will favor heavy rain tonight into Friday,
with additional potential for rain into Saturday. For tonight,
shortwave trough will move from eastern Colorado into the central
Plains, while the low level jet intensifies overnight.
Precipitable water values are in the 2 to 2.5" range, and this
high moisture airmass will be lifted over an existing boundary.
Southwest unidirectional flow through a deep layer will favor
repeated and regenerating areas of heavy rain with embedded
thunderstorms tonight into Friday morning. Given the previous
heavy rain this morning, expect that any additional rains
overnight will likely result in some localized flooding issues by
Friday morning.

The upper air pattern will favor heavy rain on Friday night into
Saturday as well, although the heaviest rains may be shifted
farther east, into northwest Arkansas. Below normal high temps
will be common for Friday and Saturday for parts of the area
affected by clouds and rain. The upper ridge begins to build again
by Sunday, with possibly our first 100 degree day in Tulsa. The
heat continues through the early part of the week, before a
cooldown and front arrive by the middle of next week.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   74  87  76  96 /  80  60  20  20
FSM   76  87  77  96 /  50  60  20  20
MLC   77  91  78  97 /  20  20  10  10
BVO   73  83  73  93 /  80  60  20  20
FYV   73  80  73  90 /  80  80  20  30
BYV   71  81  72  91 /  80  90  30  30
MKO   76  88  75  95 /  60  50  20  20
MIO   72  82  73  90 /  80  80  30  20
F10   76  89  76  98 /  50  20  10  10
HHW   78  94  78  97 /  10  10  10  10

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...Flash Flood Watch through Friday morning for OKZ055>058-061>063.

     Heat Advisory until 7 PM CDT this evening for OKZ049-053-073>076.

     Flash Flood Watch from 7 PM CDT this evening through Friday
     morning for OKZ068-069.

AR...Flash Flood Watch through Friday morning for ARZ001-002-010-011.

     Heat Advisory until 7 PM CDT this evening for ARZ029.

&&

SHORT TERM...18
LONG TERM....06

CORFIDI
Hazardous weather outlook, Aug 8, 4:54 PM CDT, 3 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Tulsa OK
454 PM CDT Thu Aug 8 2019

ARZ001-002-010-011-019-020-029-OKZ049-053>076-091030-
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-
454 PM CDT Thu Aug 8 2019

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

.DAY ONE...This Evening and Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...This evening through tonight.

FLASH FLOOD.
	RISK...Elevated.
	AREA...Northeast Oklahoma and Northwest Arkansas.
	ONSET...Tonight.

HEAVY RAIN.
	RISK...Significant.
	AREA...Northeast Oklahoma and Northwest Arkansas.
	ONSET...Tonight.

DANGEROUS HEAT.
	RISK...Significant.
	AREA...Mainly along and south of Interstate 40.
	ONSET...Ongoing.

DISCUSSION...
A weak surface boundary stretched west to east roughly along the
Interstate 40 corridor late this afternoon. Showers and
thunderstorms will remain possible near and mainly to the north
of this boundary this evening and into the overnight hours. A few
of the storms could become strong to marginally severe, although
organized severe weather is not expected.

Heavy rain producing thunderstorms training across the same areas
will also raise flash flood concerns across parts of northeast
Oklahoma and northwest Arkansas, mainly tonight.

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

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
FRIDAY...Thunderstorm Potential...Dangerous Heat
Potential...Heavy Rain Potential.
SATURDAY and SUNDAY...Thunderstorm Potential...Dangerous Heat
Potential.
MONDAY...Dangerous Heat Potential.
TUESDAY...Thunderstorm Potential...Dangerous Heat Potential.
WEDNESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Showers and thunderstorms will remain possible into Saturday as
the frontal boundary lingers in the vicinity. Another frontal
boundary will move into the area next week, with thunderstorm
chances increasing Tuesday and Wednesday as a result.

To the south of the frontal boundaries, hot and humid conditions
will continue, with afternoon heat index values nearing or
exceeding 105 degrees each afternoon.

weather.gov/tulsa contains additional information.

In the hours before

Local storm report, Aug 8, 2:58 PM CDT, 5 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
258 PM CDT THU AUG 8 2019

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

0130 AM     TSTM WND DMG     2 S BLUEJACKET          36.77N 95.07W
08/08/2019                   CRAIG              OK   EMERGENCY MNGR

            SEVERAL TREES DOWN. OUTBUILDING SIGNIFICANTLY DAMAGED.
            EVENT TIME BASED ON RADAR.

&&

CAS
Special weather statement, Aug 8, 5:49 PM CDT, 2 hours 20 minutes before
Special Weather Statement
National Weather Service Tulsa OK
549 PM CDT Thu Aug 8 2019

OKZ076-082315-
Le Flore OK-
549 PM CDT Thu Aug 8 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LE FLORE COUNTY
UNTIL 615 PM CDT...

At 548 PM CDT, a strong thunderstorm was located over Cameron, moving
southeast at 5 mph.

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

Locations in or near the path include...
Cameron...                        Shady Point...
Rock Island...                    Scullyville...

LAT...LON 3513 9469 3525 9457 3520 9444 3503 9445
TIME...MOT...LOC 2248Z 297DEG 7KT 3514 9455
Special weather statement, Aug 8, 5:59 PM CDT, 2 hours 10 minutes before
Special Weather Statement
National Weather Service Tulsa OK
559 PM CDT Thu Aug 8 2019

OKZ073-075-082345-
Pittsburg OK-Latimer OK-
559 PM CDT Thu Aug 8 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LATIMER AND EAST
CENTRAL PITTSBURG COUNTIES UNTIL 645 PM CDT...

At 559 PM CDT, a strong thunderstorm was located near Blocker, moving
east at 10 mph.

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

Locations in or near the path include...
Quinton...                        Blocker...
Robbers Cave State Park...        Featherston...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3495 9565 3512 9561 3513 9535 3506 9535
      3506 9531 3486 9535
TIME...MOT...LOC 2259Z 278DEG 7KT 3503 9555
Local storm report, Aug 8, 6:36 PM CDT, 1 hour 33 minutes before
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Special weather statement, Aug 8, 7:23 PM CDT, 46 minutes before
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Special weather statement, Aug 8, 8:09 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Tulsa OK
809 PM CDT Thu Aug 8 2019

OKZ072-074-090200-
Haskell OK-Sequoyah OK-
809 PM CDT Thu Aug 8 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN HASKELL AND CENTRAL
SEQUOYAH COUNTIES UNTIL 900 PM CDT...

At 809 PM CDT, a strong thunderstorm was located 5 miles southwest of
Vian, moving east at 20 mph.

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

Locations in or near the path include...
Sallisaw...                       Vian...
Gore...                           Gans...
Marble City...                    Tamaha...
Brushy Lake State Park...         Brushy...
Mc Key...

This includes Interstate 40 in Oklahoma between mile markers 289 and
316.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3533 9464 3533 9471 3536 9475 3536 9477
      3534 9479 3536 9511 3539 9511 3541 9508
      3544 9508 3546 9505 3546 9508 3549 9510
      3550 9512 3556 9512 3560 9465
TIME...MOT...LOC 0109Z 269DEG 18KT 3546 9505

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 7:23 PM CDTSpecial Weather StatementTSAHaskell52 min
Aug 8, 8:20 PM CDTSpecial Weather StatementTSAPittsburg40 min
Aug 8, 9:46 PM CDTSpecial Weather StatementTSAOkfuskee44 min
Aug 8, 10:24 PM CDTAreal Flood AdvisoryTSACreek, Okfuskee3 hr
Aug 9, 3:33 AM CDTHeat AdvisoryTSAChoctaw, Pushmataha15 hr
Aug 9, 5:33 AM CDTFlash Flood WarningTSAAdair, Sequoyah6 hr
Aug 9, 7:15 AM CDTAreal Flood AdvisoryTSAAdair, Cherokee, Haskell, LeFlore, Sequoyah3 hr
Aug 9, 8:16 AM CDTAreal Flood AdvisoryTSACreek, Osage, Rogers, Tulsa, Wagoner3 hr
Aug 9, 8:24 AM CDTAreal Flood AdvisoryTSACreek, Osage, Pawnee, Tulsa3 hr
Aug 9, 8:56 AM CDTFlash Flood WarningTSACherokee3 hr
Aug 9, 10:55 AM CDTAreal Flood AdvisoryTSAMayes, Rogers3 hr
Aug 9, 11:27 AM CDTFlash Flood WarningTSAMayes, Rogers95 min
Aug 9, 11:40 AM CDTAreal Flood WarningTSAAdair6 hr
Aug 9, 12:24 PM CDTAreal Flood WarningTSACherokee3 hr
Aug 9, 3:09 PM CDTHeat AdvisoryTSACherokee, Choctaw, Craig, Creek, Delaware, Haskell and 15 more29 hr
Aug 9, 3:09 PM CDTHeat AdvisoryTSAAdair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more53 hr
Aug 8, 9:05 PM CDTAreal Flood AdvisoryTSABenton, Carroll, Madison, Washington3 hr
Aug 8, 11:52 PM CDTAreal Flood AdvisoryTSABenton, Carroll, Crawford, Franklin, Madison, Washington3 hr
Aug 9, 2:04 AM CDTFlash Flood WarningTSACrawford, Franklin6 hr
Aug 9, 3:42 AM CDTFlash Flood WarningTSACrawford, Franklin, Sebastian8 hr
Aug 9, 3:49 AM CDTSpecial Weather StatementTSACrawford41 min
Aug 9, 5:29 AM CDTRiver Flood AdvisoryTSACrawford, Franklin5 hr
Aug 9, 7:58 AM CDTAreal Flood WarningTSACrawford, Franklin6 hr

Nearby

Special Weather Statements in Oklahoma, 2019Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.