Alert archive / Oklahoma / Special Weather Statements in 2017

Special Weather Statement, NWS Tulsa, OK

August 11, 2017Ottawa County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Aug 11, 2017, 3:55 AM CDT for Ottawa County, Oklahoma. It was in force for 35 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 11, 2017, 3:55 AM CDT (08:55 UTC)
Expired: Aug 11, 2017, 4:30 AM CDT
In force: 35 min
Issued by: NWS Tulsa, OK

County Ottawa County, OK

The radar

The Tulsa radar (KINX), 112 km from the middle of the area, began a volume at 08:56 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.9 hours before the alert went out and 79 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: 1344 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1104 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.7

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 11, 3:24 AM CDT, 31 minutes earlier.

Area forecast discussion, Aug 11, 3:24 AM CDT, 31 minutes before

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Hazardous weather outlook, Aug 10, 9:41 PM CDT, 6 hours 14 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
941 PM CDT Thu Aug 10 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-111015-
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-
941 PM CDT Thu Aug 10 2017

...ACTIVE PATTERN TO PERSIST INTO NEXT WEEK WITH PERIODS OF HEAVY
RAINFALL LIKELY...

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

.DAY ONE...Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Mainly northeast Oklahoma.
	ONSET...Ongoing.

FLASH FLOOD.
	RISK...Limited.
	AREA...Mainly northeast Oklahoma.
	ONSET...Ongoing.

HEAVY RAIN.
	RISK...Elevated.
	AREA...Mainly northeast Oklahoma.
	ONSET...Ongoing.

DISCUSSION...
Thunderstorms are expected to develop through the evening and
into the overnight in the vicinity of a cold front across parts of
Kansas. These thunderstorms will move to the southeast toward
northeast Oklahoma and far northwest Arkansas after midnight. The
heavy rain and flash flood potential will be increased with these
thunderstorms, especially if heavy rains affect areas that
received a lot of rain earlier this evening. The strongest storms
may also pose a risk of damaging winds, especially if an
organized complex develops.

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

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
FRIDAY THROUGH SUNDAY...Thunderstorm Potential...Heavy Rain Potential.
MONDAY...Thunderstorm Potential.
TUESDAY AND WEDNESDAY...Thunderstorm Potential...Heavy Rain Potential.

EXTENDED DISCUSSION...
Daily rounds of thunderstorms are expected from Friday into the
weekend. While the details remain difficult to pinpoint, many
areas will see 3 to 5 inches of rain between Thursday and
Saturday night, with local amounts possibly approaching 10 inches.
At this time it appears the greatest potential for the heaviest
rain will be focused across east central Oklahoma although the
axis of heavy rain will likely shift as this system evolves and
the situation becomes more clear. The rain is likely to be
widespread enough to cause rises on a number of area creeks and
streams, with some local flash flooding possible at locations
receiving the fastest rain rates.

The threat for additional locally heavy rainfall will likely
continue in some areas through mid week as the pattern remains
favorable. Flooding of main stem rivers will ultimately become a
concern should forecast rainfall amounts materialize.

There will also be at least limited severe weather potential with
any organized storm complexes, mainly in the form of damaging
wind gusts.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
Emergency managers should closely follow later forecasts as details
are refined and be prepared for at least some severe weather and
flooding potential from tonight through the weekend. Flash Flood
Watches will likely be issued for parts of the forecast area.

weather.gov/tulsa contains additional information.

In the hours before

Local storm report, Aug 10, 9:58 PM CDT, 5 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
958 PM CDT THU AUG 10 2017

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

0735 PM     TSTM WND DMG     DEWEY                   36.80N 95.94W
08/10/2017                   WASHINGTON         OK   PUBLIC

            LARGE METAL BARN SEVERLY DAMAGED.

&&

JDS

Special weather statement, Aug 10, 10:15 PM CDT, 5 hours 40 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1015 PM CDT THU AUG 10 2017

OKZ062-110345-
Mayes OK-
1015 PM CDT THU AUG 10 2017

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MAYES COUNTY UNTIL 1045
PM CDT...

At 1015 PM CDT, a strong thunderstorm was located over Pryor Creek,
moving southeast at 20 mph.

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

Locations in or near the path include...
Pryor...                          Pryor Creek...
Locust Grove...                   Sportsmen Acres Community...
Murphy...

LAT...LON 3630 9540 3636 9529 3621 9508 3613 9525
TIME...MOT...LOC 0315Z 310DEG 18KT 3627 9530

Local storm report, Aug 10, 10:31 PM CDT, 5 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1031 PM CDT THU AUG 10 2017

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

0948 PM     TSTM WND DMG     5 WNW PRYOR             36.34N 95.40W
08/10/2017                   MAYES              OK   EMERGENCY MNGR

            MOBILE HOME ROLLED, POWER POLLS AND TREES DOWN, BARN
            DAMAGED OR DESTROYED. TIME ESTIMATED BY RADAR.

&&

LACY

Local storm report, Aug 10, 10:57 PM CDT, 4 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE TULSA OK
1057 PM CDT THU AUG 10 2017

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

0949 PM     TSTM WND DMG     5 WNW PRYOR             36.34N 95.40W
08/10/2017                   MAYES              OK   EMERGENCY MNGR

            UNOCCUPIED MOBILE HOME ROLLED AND DESTROYED, POWER POLLS
            AND TREES DOWN, 2 BARNS DESTROYED IN THE OSAGE AREA. TIME
            ESTIMATED BY RADAR.

&&

LACY

Special weather statement, Aug 11, 3:45 AM CDT, 10 minutes before

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Special weather statement, Aug 11, 3:55 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 7:09 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	36 min
Aug 10, 7:38 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Washington	52 min
Aug 10, 7:46 PM CDT	Severe Thunderstorm Warning	TSA	Osage	29 min
Aug 10, 8:09 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers	51 min
Aug 10, 8:15 PM CDT	Special Weather Statement	TSA	Osage	30 min
Aug 10, 8:55 PM CDT	Special Weather Statement	TSA	Mayes	35 min
Aug 10, 9:42 PM CDT	Special Weather Statement	TSA	Mayes	33 min
Aug 10, 10:15 PM CDT	Special Weather Statement	TSA	Mayes	30 min
Aug 11, 2:01 AM CDT	Flash Flood Watch	TSA	Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more	7 hr
Aug 11, 3:45 AM CDT	Special Weather Statement	TSA	Pawnee	45 min
Aug 11, 3:58 AM CDT	Special Weather Statement	TSA	Washington	47 min
Aug 11, 4:05 AM CDT	Special Weather Statement	TSA	Creek, Okfuskee	40 min
Aug 11, 4:19 AM CDT	Areal Flood Advisory	TSA	Tulsa	3 hr
Aug 11, 4:22 AM CDT	Special Weather Statement	TSA	Tulsa	38 min
Aug 11, 5:29 AM CDT	Special Weather Statement	TSA	Muskogee, Wagoner	46 min
Aug 11, 8:26 AM CDT	Special Weather Statement	TSA	Sebastian	34 min

Nearby

Special Weather Statements in Oklahoma, 2017 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.