Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 603, NWS Norman, OK

July 6, 20166 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 6, 2016, 9:28 PM CDT for 6 counties in Oklahoma. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 6, 2016, 9:28 PM CDT (02:28 UTC)
Expired: Jul 6, 2016, 10:15 PM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Caddo County, OK, Comanche County, OK, Cotton County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK

The radar

The Altus AFB radar (KFDR), 39 km from the middle of the area, began a volume at 02:28 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, 2.5 hours before the alert went out and 138 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: 2879 J/kg
Mixed-layer CIN: -241 J/kg
Mixed-layer LCL: 1629 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 6, 6:52 PM CDT, 2 hours 36 minutes earlier.

Area forecast discussion, Jul 6, 6:52 PM CDT, 2 hours 36 minutes before

Area Forecast Discussion
National Weather Service Norman OK
652 PM CDT WED JUL 6 2016

.DISCUSSION...
00Z TAFS.

&&

.AVIATION...
Scattered storms are expected to move into western Oklahoma and
western north Texas. But as usual, the probability of one of
these storms affecting any specific TAF site is less than 50
percent at this point so will not include a TEMPO group in this
set. Away from storms, VFR conditions are expected.

&&

.PREV DISCUSSION... /issued 252 PM CDT WED JUL 6 2016/

DISCUSSION...
Forecast concerns for this update are focused upon ongoing
excessive heat over parts of north/central Oklahoma and prospects
for convection to spread east from west Texas this evening.

Current heat index values are occasionally reaching 110 degrees
from Kingfisher to Perkins and surrounding sites. Meanwhile 105 to
110 degree heat index values continue along a broad corridor from
western north Texas over much of Oklahoma. The Heat Advisory has
been expanded a bit on its western periphery and upgraded to an
Excessive Heat Warning over north/central Oklahoma. Will maintain
these headlines through Thursday, but influences from convection
tonight and/or any slight decrease in surface dewpoints could
dictate later adjustments.

Convection allowing models have shown a consistent signal for
scattered convection to originate within the deeply mixed boundary
layer over west Texas late this afternoon and spreading eastward
over western Oklahoma and western north Texas this evening. This
appears evident in satellite trends with deepening cumulus over
the southern Texas Panhandle and South Plains. With sufficient
steering flow and deep effective shear around 30 kt a threat of
severe/damaging wind gusts appears to exist with this activity as
it moves east of the 100th meridian around 00z.

Beyond these immediate hazards, ensemble confidence plots suggest
low confidence in the model blends through the weekend when a
front is expected to approach/impact the region. As of now, the
most likely timeframe for meaningful rainfall appears to be Friday
night/early Saturday favoring northern/northeastern Oklahoma.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  77  97  78  96 /  10   0  10  20
Hobart OK         77 103  79  99 /  40   0   0  20
Wichita Falls TX  79 101  79 100 /  20   0   0  10
Gage OK           76 105  74  97 /  40   0  10  30
Ponca City OK     80  99  78  93 /  20  10  10  30
Durant OK         77  95  78  95 /  10   0   0  10

&&

.OUN Watches/Warnings/Advisories...
OK...Excessive Heat Warning until 8 PM CDT Thursday for OKZ012-013-
     018>020-024>026.

     Heat Advisory until 8 PM CDT Thursday for OKZ006>008-011-016-017-
     022-023-027>032-035>048-050>052.

TX...Heat Advisory until 8 PM CDT Thursday for TXZ083>090.

&&

Hazardous weather outlook, Jul 6, 6:20 PM CDT, 3 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
620 PM CDT WED JUL 6 2016

OKZ004>048-050>052-TXZ083>090-071015-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-
NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-
BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-
TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-
JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-
FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
620 PM CDT WED JUL 6 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...TONIGHT...

.THUNDERSTORMS
SCATTERED SHOWERS AND STORMS HAVE DEVELOPED ACROSS THE TEXAS
PANHANDLE...JUST EAST OF AMARILLO.  AS SUNSET APPROACHES...A FEW
OF THESE STORMS MAY MOVE INTO FAR WESTERN OKLAHOMA AND PERHAPS
WESTERN NORTH TEXAS.  THE STRONGER STORMS WILL BE CAPABLE OF
PRODUCING WIND GUSTS UP TO 60 MPH. SMALL HAIL AND HEAVY DOWNPOURS
WILL ALSO BE A CONCERN.

STORM INTENSITY WILL DECREASE THROUGH THE LATE EVENING. IT'S
POSSIBLE THAT A FEW STORMS MAY REACH THE INTERSTATE 35 CORRIDOR.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

.THUNDERSTORMS...
A FRONT IS EXPECTED TO MOVE INTO OKLAHOMA FRIDAY AND SATURDAY
INCREASING THUNDERSTORM CHANCES ACROSS THE AREA. THERE IS A
MARGINAL RISK OF SEVERE THUNDERSTORMS FRIDAY IN NORTH CENTRAL
OKLAHOMA. LOWER CHANCES FOR THUNDERSTORMS EXIST SUNDAY INTO EARLY
NEXT WEEK.

.HEAT...
HEAT INDEX VALUES OF 105 TO 113 ARE EXPECTED AGAIN THURSDAY
AFTERNOON. HEAT ADVISORIES AND EXCESSIVE HEAT WARNINGS ARE IN
EFFECT.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

In the hours before

Local storm report, Jul 6, 8:59 PM CDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
859 PM CDT WED JUL 06 2016

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

0845 PM     TSTM WND GST     3 W GOULD               34.67N 99.83W
07/06/2016  M74 MPH          HARMON             OK   MESONET

0845 PM     TSTM WND GST     6 WNW ELDORADO          34.51N 99.75W
07/06/2016  M82 MPH          JACKSON            OK   TRAINED SPOTTER

0850 PM     TSTM WND GST     3 W GOODLETT            34.34N 99.94W
07/06/2016  M75 MPH          HARDEMAN           TX   MESONET

&&

DW

Local storm report, Jul 6, 9:09 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
909 PM CDT WED JUL 06 2016

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

0900 PM     TSTM WND GST     3 W GOODLETT            34.34N 99.94W
07/06/2016  M59 MPH          HARDEMAN           TX   MESONET

&&

DW

Local storm report, Jul 6, 9:22 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
922 PM CDT WED JUL 06 2016

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

0915 PM     TSTM WND GST     3 S ALTUS               34.60N 99.33W
07/06/2016  M59 MPH          JACKSON            OK   MESONET

&&

DW

Local storm report, Jul 6, 9:27 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
927 PM CDT WED JUL 06 2016

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

0919 PM     TSTM WND GST     4 ENE ODELL             34.37N 99.35W
07/06/2016  M70 MPH          WILBARGER          TX   MESONET

&&

DW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 8:20 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	40 min
Jul 6, 8:56 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Kiowa, Tillman	49 min
Jul 6, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Wilbarger	47 min
Jul 6, 9:39 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Foard, Hardeman, Knox, Wichita and 1 more	41 min
Jul 7, 12:11 AM CDT	Special Weather Statement	OUN	Wilbarger	49 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2016 Every severe thunderstorm warning in 2016

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.