Alert archive / Oklahoma / Special Weather Statements in 2019

Special Weather Statement, NWS Tulsa, OK

August 20, 2019McIntosh County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Aug 20, 2019, 8:49 PM CDT for McIntosh County, Oklahoma. It was in force for 26 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 20, 2019, 8:49 PM CDT (01:49 UTC)
Expired
Aug 20, 2019, 9:15 PM CDT
In force
26 min
Issued by
NWS Tulsa, OK

County McIntosh County, OK

The radar

The Tulsa radar (KINX), 104 km from the middle of the area, began a volume at 01:53 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

Norman, OK (KOUN), launched 00:00Z, 1.8 hours before the alert went out and 164 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, Norman, OK at 00:00Z on 2019-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2308 joules per kilogram.LCLEL10008507005003002001001 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, Norman, OK at 00:00Z on 2019-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.1939Sfc1 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
2308 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
2227 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
39 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 20, 8:26 PM CDT, 23 minutes earlier.

Area forecast discussion, Aug 20, 8:26 PM CDT, 23 minutes before
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Hazardous weather outlook, Aug 20, 4:49 PM CDT, 4 hours before
Hazardous Weather Outlook
National Weather Service Tulsa OK
449 PM CDT Tue Aug 20 2019

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211045-
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-
449 PM CDT Tue Aug 20 2019

...DANGEROUS HEAT CONTINUES TODAY AND TOMORROW...

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

.DAY ONE...Today and Tonight.

THUNDERSTORMS WITH DANGEROUS LIGHTNING.
	RISK...Limited.
	AREA... Terrain areas of southeast Oklahoma and northwestern Arkansas.
    ONSET... Ongoing.

DANGEROUS HEAT.
	RISK...Critical.
    AREA... Eastern Oklahoma and northwest Arkansas.
    ONSET... Ongoing.

AREA AT GREATEST RISK... Northeast Oklahoma and northwest
Arkansas.

DISCUSSION...

Dangerous heat is ongoing across much of eastern Oklahoma and
northwestern Arkansas. Heat indices are currently (as of 4:45 PM)
in the 103 to 112 range. If you are outside this
afternoon/evening, be sure to take heat precautions such as taking
frequent breaks in the AC and drinking plenty of fluids.

A few showers and thunderstorms have bubbled up across portions of
southeast Oklahoma and west-central Arkansas. Where storms occur,
dangerous cloud-to-ground lightning will be likely along with
gusty winds and heavy downpours. These spotty thunderstorms are
also bringing local relief from the heat with locations such as
Clayton, OK cooling down from heat indices well over 100 to 89.
Additional thunderstorm development is possible this afternoon and
evening albeit very isolated. This activity will likely dissipate
quickly as we near sun set.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Spotter Activation Not Expected.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
WEDNESDAY and THURSDAY...Thunderstorm Potential...Dangerous Heat
Potential...Heavy Rain Potential.
FRIDAY and Saturday...Thunderstorm Potential.
SUNDAY and MONDAY...Thunderstorm Potential...Dangerous Heat
Potential.

EXTENDED DISCUSSION...

Hot and humid conditions will continue on Wednesday with several
locations exceeding a heat index of 105 with some nearing 110.
Trends will need to be monitored for a potential Excessive Heat
Warning issuance for tomorrow afternoon. The end of this stretch
of very hot and humid conditions is in sight. A cold front will
begin to move into the northern portions of northeast Oklahoma
and northwest Arkansas late Wednesday into Thursday. The front
will be the main focal point for showers and thunderstorms
beginning Wednesday afternoon and continuing into the weekend.

There is the potential of some stronger storms Wednesday and
especially as we move into Thursday with the main severe threat
being damaging wind gusts. The unsettled pattern through the
weekend will bring the chance for multiple rounds of showers and
storms, especially over northeast OK and northwest AR, as well as
much cooler weather. Rainfall totals through the weekend will
generally be in the 1 to 2 inch range for northeast Oklahoma and
northwest Arkansas with totals decreasing the farther southeast
you go. Locally higher rainfall totals will be possible where
storms train over the same areas.

The potential for elevated heat indices starts to increase by
Sunday and Monday as the influence of the cold front begins to
lessen and the upper level ridge builds back into our region.

weather.gov/tulsa contains additional information.

Snider

In the hours before

Special weather statement, Aug 20, 7:35 PM CDT, 1 hour 14 minutes before
Special Weather Statement
National Weather Service Tulsa OK
735 PM CDT Tue Aug 20 2019

OKZ073-210100-
Pittsburg OK-
735 PM CDT Tue Aug 20 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PITTSBURG COUNTY UNTIL
800 PM CDT...

At 734 PM CDT, a strong thunderstorm was located 4 miles northeast of
Krebs. This storm was nearly stationary.

Winds in excess of 40 mph will be possible with this storm.

Locations in or near the path include...
Mcalester...                      Krebs...
Alderson...                       Dow...
Bache...

LAT...LON 3507 9570 3499 9551 3483 9562 3493 9587
TIME...MOT...LOC 0034Z 031DEG 3KT 3498 9566
Special weather statement, Aug 20, 7:53 PM CDT, 56 minutes before
Special Weather Statement
National Weather Service Tulsa OK
753 PM CDT Tue Aug 20 2019

OKZ060-066-067-070-210130-
Tulsa OK-Muskogee OK-Okmulgee OK-Wagoner OK-
753 PM CDT Tue Aug 20 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WAGONER...
NORTHWESTERN MUSKOGEE...NORTHEASTERN OKMULGEE AND SOUTH CENTRAL TULSA
COUNTIES UNTIL 830 PM CDT...

At 753 PM CDT, a strong thunderstorm was located 3 miles north of
Bald Hill. This storm was nearly stationary.

Winds of 35 to 45 mph will be possible with this storm.

Locations in or near the path include...
Bald Hill...                      Stonebluff...
Liberty...                        Hectorville...

LAT...LON 3571 9571 3571 9595 3588 9597 3590 9571
TIME...MOT...LOC 0053Z 167DEG 1KT 3579 9585
Special weather statement, Aug 20, 7:57 PM CDT, 52 minutes before
Special Weather Statement
National Weather Service Tulsa OK
757 PM CDT Tue Aug 20 2019

OKZ073-210130-
Pittsburg OK-
757 PM CDT Tue Aug 20 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PITTSBURG COUNTY UNTIL
830 PM CDT...

At 756 PM CDT, a strong thunderstorm was located over Krebs. This
storm was nearly stationary.

Winds in excess of 40 mph will be possible with this storm.

Locations in or near the path include...
Mcalester...                      Krebs...
Alderson...                       Mcalester Regional Airport...
Bache...

LAT...LON 3507 9571 3495 9555 3480 9567 3490 9587
TIME...MOT...LOC 0056Z 039DEG 3KT 3492 9572
Special weather statement, Aug 20, 8:22 PM CDT, 27 minutes before
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Special weather statement, Aug 20, 8:35 PM CDT, 14 minutes before
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Special weather statement, Aug 20, 8:49 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 7:35 PM CDTSpecial Weather StatementTSAPittsburg25 min
Aug 20, 7:53 PM CDTSpecial Weather StatementTSAOkmulgee37 min
Aug 20, 7:57 PM CDTSpecial Weather StatementTSAPittsburg33 min
Aug 20, 8:14 PM CDTSevere Thunderstorm WarningTSAPittsburg18 min
Aug 20, 8:22 PM CDTSpecial Weather StatementTSAOkmulgee23 min
Aug 20, 8:35 PM CDTSpecial Weather StatementTSAOkmulgee40 min
Aug 21, 2:11 PM CDTSpecial Weather StatementTSATulsa34 min
Aug 21, 2:34 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa41 min
Aug 21, 2:39 PM CDTSpecial Weather StatementTSATulsa36 min
Aug 21, 3:01 PM CDTSpecial Weather StatementTSADelaware29 min
Aug 21, 3:05 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa, Washington40 min
Aug 21, 3:17 PM CDTSpecial Weather StatementTSAWagoner28 min
Aug 21, 3:20 PM CDTSpecial Weather StatementTSAHaskell25 min
Aug 21, 3:22 PM CDTSpecial Weather StatementTSASequoyah23 min
Aug 21, 3:31 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa, Wagoner44 min
Aug 21, 3:49 PM CDTSpecial Weather StatementTSAHaskell26 min
Aug 21, 3:50 PM CDTSpecial Weather StatementTSAOkmulgee25 min
Aug 21, 4:12 PM CDTSpecial Weather StatementTSAMuskogee33 min
Aug 21, 4:31 PM CDTSpecial Weather StatementTSAOkmulgee29 min
Aug 21, 4:35 PM CDTSpecial Weather StatementTSAMuskogee25 min
Aug 21, 4:47 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee43 min
Aug 21, 4:54 PM CDTSpecial Weather StatementTSATulsa36 min
Aug 21, 5:07 PM CDTSpecial Weather StatementTSAWagoner38 min
Aug 21, 5:30 PM CDTSpecial Weather StatementTSAWagoner30 min
Aug 21, 5:34 PM CDTSevere Thunderstorm WarningTSALeFlore, Sequoyah41 min
Aug 21, 5:39 PM CDTSpecial Weather StatementTSAPittsburg51 min
Aug 21, 6:28 PM CDTSpecial Weather StatementTSALeFlore32 min
Aug 21, 6:33 PM CDTSpecial Weather StatementTSAPittsburg27 min
Aug 21, 3:09 AM CDTExcessive Heat WarningTSA16 hr
Aug 21, 3:13 PM CDTSpecial Weather StatementTSAMadison32 min
Aug 21, 3:39 PM CDTSpecial Weather StatementTSAMadison66 min
Aug 21, 3:44 PM CDTSevere Thunderstorm WarningTSAMadison, Washington35 min
Aug 21, 4:10 PM CDTAreal Flood AdvisoryTSABenton, Carroll, Madison, Washington2 hr
Aug 21, 4:24 PM CDTSpecial Weather StatementTSASebastian36 min
Aug 21, 4:30 PM CDTSpecial Weather StatementTSACarroll60 min
Aug 21, 4:40 PM CDTSpecial Weather StatementTSAWashington35 min
Aug 21, 5:18 PM CDTSpecial Weather StatementTSASebastian27 min
Aug 21, 5:25 PM CDTSpecial Weather StatementTSABenton35 min
Aug 21, 6:21 PM CDTSpecial Weather StatementTSAFranklin24 min

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.