Alert archive / Oklahoma / Special Weather Statements in 2017

Special Weather Statement, NWS Tulsa, OK

July 7, 2017Ottawa County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Jul 7, 2017, 5:29 PM CDT for Ottawa County, Oklahoma. It was in force for 31 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
Jul 7, 2017, 5:29 PM CDT (22:29 UTC)
Expired
Jul 7, 2017, 6:00 PM CDT
In force
31 min
Issued by
NWS Tulsa, OK

County Ottawa County, OK

The radar

The Tulsa radar (KINX), 83 km from the middle of the area, began a volume at 22:29 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 12:00Z, 10.5 hours before the alert went out and 106 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 12:00Z on 2017-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2017-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1827 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
143 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 Jul 7, 4:18 PM CDT, 1 hour 11 minutes earlier.

Area forecast discussion, Jul 7, 4:18 PM CDT, 1 hour 11 minutes before
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Hazardous weather outlook, Jul 7, 5:10 PM CDT, 19 minutes before
Hazardous Weather Outlook
National Weather Service Tulsa OK
510 PM CDT Fri Jul 7 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-081000-
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-
510 PM CDT Fri Jul 7 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 Northwest Arkansas.
	ONSET...Ongoing.

HEAVY RAIN.
	RISK...Limited.
	AREA...Northeast Oklahoma and Northwest Arkansas.
	ONSET...Ongoing.

DANGEROUS HEAT.
	RISK...Elevated.
	AREA...Much of Eastern Oklahoam and Western Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Scattered thunderstorms have developed across parts of far
northeast Oklahoma late this afternoon ahead of a cold front
moving south across southern Kansas. Scattered storm development
may continue through the night as the cold front moves south into
the area. A few of these storms may become severe, especially
early this evening, with gusty winds and hail up to quarter size
the main concern. The slow movement of storms will also result in
locally heavy rainfall.

Heat index values near or above 100 degrees will continue to be
possible across much of the area until sunset.

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

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
SATURDAY and SUNDAY...Thunderstorm Potential.
MONDAY through WEDNESDAY...No Hazards.
THURSDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Showers and thunderstorms will continue to be possible on Saturday
as the cold front moves through the region. Thunderstorms will
also be possible Saturday night into Sunday as a thunderstorm
complex is forecast to move out of Kansas and across the area.
Thunderstorm chances diminish early next week as high pressure
prevails. This will result in hotter temperatures across the
region.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, Jul 7, 4:07 PM CDT, 1 hour 22 minutes before
Special Weather Statement
National Weather Service Tulsa OK
407 PM CDT FRI JUL 7 2017

OKZ056-057-072200-
Craig OK-Nowata OK-
407 PM CDT FRI JUL 7 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CRAIG AND EASTERN
NOWATA COUNTIES UNTIL 500 PM CDT...

At 407 PM CDT, a strong thunderstorm was reported 3 miles northeast
of Lenapah, moving southeast at 15 mph.

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

Locations in or near the path include...
South Coffeyville...              Delaware...
Lenapah...                        Hollow...
Centralia...                      Centrailia...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3673 9570 3699 9563 3688 9521 3664 9535
TIME...MOT...LOC 2107Z 294DEG 14KT 3688 9560
Special weather statement, Jul 7, 5:29 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
Jul 7, 4:07 PM CDTSpecial Weather StatementTSANowata53 min
Jul 7, 4:20 PM CDTSevere Thunderstorm WarningTSACraig, Nowata, Rogers40 min
Jul 7, 4:45 PM CDTSevere Thunderstorm WarningTSACraig, Nowata45 min

Nearby

Special Weather Statements in Oklahoma, 2017Every 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.