Alert archive / Texas / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 311, NWS Norman, OK

May 17, 2016Cotton County, Oklahoma; Clay County, Wichita County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 17, 2016, 2:07 AM CDT for Cotton County, Oklahoma; Clay County, Wichita County, Texas. It was in force for 38 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: May 17, 2016, 2:07 AM CDT (07:07 UTC)
Expired: May 17, 2016, 2:45 AM CDT
In force: 38 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Cotton County, OK, Clay County, TX, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 63 km from the middle of the area, began a volume at 07:09 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 16, 8:59 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 16, 11:58 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.1 hours before the alert went out and 163 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: 490 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 826 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.6

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 May 16, 10:49 PM CDT, 3 hours 18 minutes earlier.

Area forecast discussion, May 16, 10:49 PM CDT, 3 hours 18 minutes before

Area Forecast Discussion
National Weather Service Norman OK
1049 PM CDT MON MAY 16 2016

.DISCUSSION...

&&

.AVIATION...
a thunderstorm complex will move across southwest oklahoma through
the night. rain and thunder will spread east over most of oklahoma
early Tuesday. ifr conditions are exected to develop behind a cold
front passing the the state early tuesday.

&&

.PREV DISCUSSION... /issued 950 PM CDT MON MAY 16 2016/

DISCUSSION...
pops were increased across southwest oklahoma for the after
midnight period. complex of severe thunderstorms moving through
west central oklahoma is expected to continue southeast and become
a larger area of rain later. no other changes were made.

PREV DISCUSSION... /issued 242 PM CDT MON MAY 16 2016/

DISCUSSION...
Main focus was on the next few days, especially tonight into the
morning.

A few storms have already developed in parts of SE CO and NE NM.
Additional storms are expected to develop in this area and parts
of the Panhandles late this afternoon and evening. This activity
will likely merge into a thunderstorm complex that will move into
parts of west central and southwest OK this evening. Additional
storms will likely develop near a frontal boundary in northern OK.
This activity could also develop into a thunderstorm complex
moving S/SE across the area tonight. Some of the short term models
show these two areas eventually merging into one big line
overnight but others show them remaining somewhat separate. Either
way one or more areas of showers/storms will move across much of
the fa overnight into Tuesday morning. The highest potential for
strong to severe storms will be with the storms coming out of the
Panhandles into west central/southwest OK. This is further south
than previous forecast. Damaging straight-line winds and large
hail will be the main concerns with any severe storms.

A cold front will also move across the region tonight into Tuesday
morning. This front is expected to be in Texas by Tuesday
afternoon but additional showers and storms could develop and
affect southern parts of the fa Tuesday afternoon/evening. A few
of these storms may become strong to severe. If, how much, and how
far north showers/storms affect the fa will likely depend on what
happens tonight and how far south the front moves Tuesday.

Rain chances will continue for at least parts of the area through
Friday but the next best chance for rain will be Wednesday
afternoon into Thursday when an upper trough approaches and begins
to move across the Central/Southern Plains. This system is
expected to move east of the area Friday. Models show an upper
ridge affecting the region as the next trough moves into the
western U.S. This ridge will lead to a brief dry period before
rain chances return late this weekend as the mentioned trough
approaches the region. models disagree on timing of this system
with the latest run of the ECMWF being slower which could have an
impact on the rain chances.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  57  66  51  65 /  90  40  30  10
Hobart OK         58  64  51  65 /  80  20  30  20
Wichita Falls TX  62  73  53  68 /  70  40  50  20
Gage OK           51  59  46  63 /  80  20  20  20
Ponca City OK     53  62  48  66 /  90  30  20  10
Durant OK         64  75  57  69 /  50  50  50  20

&&

.OUN Watches/Warnings/Advisories...
OK...None.
TX...None.
&&

26/09/09

Hazardous weather outlook, May 17, 1:30 AM CDT, 37 minutes before

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In the hours before

Special weather statement, May 17, 12:37 AM CDT, 1 hour 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1237 AM CDT TUE MAY 17 2016

OKZ018-019-024-025-170615-
OKLAHOMA OK-CANADIAN OK-LOGAN OK-KINGFISHER OK-
1237 AM CDT TUE MAY 17 2016

...SIGNIFICANT WEATHER ADVISORY FOR OKLAHOMA...EASTERN CANADIAN...
LOGAN AND EASTERN KINGFISHER COUNTIES UNTIL 115 AM CDT...

AT 1234 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING
FROM NEAR HENNESSEY TO 5 MILES SOUTHWEST OF CASHION TO 4 MILES EAST
OF UNION CITY...MOVING EAST AT 35 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 50 MPH...

LAT...LON 3599 9735 3601 9730 3597 9727 3597 9724
      3594 9720 3595 9714 3538 9714 3538 9767
      3534 9767 3532 9773 3534 9776 3533 9785
      3536 9786 3535 9790 3538 9794 3535 9795
      3536 9798 3574 9792 3617 9799 3616 9735
TIME...MOT...LOC 0534Z 265DEG 32KT 3613 9794 3574 9773 3537 9787

Special weather statement, May 17, 12:38 AM CDT, 1 hour 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1238 AM CDT TUE MAY 17 2016

OKZ023-027-038-170615-
COMANCHE OK-GRADY OK-CADDO OK-
1238 AM CDT TUE MAY 17 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN COMANCHE...
SOUTHWESTERN GRADY AND SOUTHEASTERN CADDO COUNTIES UNTIL 115 AM
CDT...

AT 1237 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING
FROM 4 MILES NORTHWEST OF ANADARKO TO NEAR CEMENT TO NEAR FORT
SILL...MOVING EAST AT 35 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 50 MPH...

LAT...LON 3495 9826 3515 9844 3522 9794 3498 9777
      3468 9787 3468 9814 3467 9814 3465 9843
TIME...MOT...LOC 0537Z 265DEG 31KT 3510 9831 3496 9818 3467 9836

Local storm report, May 17, 12:47 AM CDT, 1 hour 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1247 AM CDT TUE MAY 17 2016

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

1235 PM     TSTM WND GST     2 W CYRIL               34.90N 98.24W
05/16/2016  M68 MPH          CADDO              OK   AMATEUR RADIO

&&

SC

Local storm report, May 17, 12:59 AM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1259 AM CDT TUE MAY 17 2016

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

1254 AM     TSTM WND GST     3 N THE VILLAGE         35.61N 97.55W
05/17/2016  M69 MPH          OKLAHOMA           OK   STORM CHASER

&&

SC

Special weather statement, May 17, 1:32 AM CDT, 35 minutes before

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Special weather statement, May 17, 1:46 AM CDT, 21 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 9:14 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	46 min
May 16, 9:31 PM CDT	Tornado Warning	OUN	Ellis, Roger Mills	29 min
May 16, 9:57 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Greer, Roger Mills, Washita	48 min
May 16, 10:02 PM CDT	Tornado Warning	OUN	Beckham, Roger Mills	28 min
May 16, 10:29 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Greer, Roger Mills, Washita	46 min
May 16, 10:53 PM CDT	Special Weather Statement	OUN	Dewey	37 min
May 16, 10:57 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	48 min
May 16, 11:04 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey	41 min
May 16, 11:35 PM CDT	Special Weather Statement	OUN	Greer	25 min
May 16, 11:38 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Kingfisher	52 min
May 16, 11:43 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa, Tillman, Washita	47 min
May 16, 11:59 PM CDT	Special Weather Statement	OUN	Harmon	31 min
May 17, 12:37 AM CDT	Special Weather Statement	OUN	Kingfisher, Logan, Oklahoma	38 min
May 17, 12:38 AM CDT	Special Weather Statement	OUN	Grady	37 min
May 17, 12:43 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	47 min
May 17, 12:53 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Oklahoma	52 min
May 17, 1:24 AM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	51 min
May 17, 1:27 AM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Stephens	48 min
May 17, 1:32 AM CDT	Special Weather Statement	OUN	Cleveland, Lincoln, Pottawatomie	28 min
May 17, 1:46 AM CDT	Special Weather Statement	OUN	Tillman	29 min
May 17, 2:58 AM CDT	Special Weather Statement	OUN	Cotton	32 min
May 17, 4:14 AM CDT	Special Weather Statement	OUN	Kay, Noble, Payne	31 min
May 17, 7:36 AM CDT	Areal Flood Advisory	OUN	Tillman	3 hr
May 17, 2:34 AM CDT	Special Weather Statement	OUN	Wichita	26 min
May 17, 3:01 AM CDT	Special Weather Statement	OUN	Foard	29 min
May 17, 3:22 AM CDT	Special Weather Statement	OUN	Clay	23 min
May 17, 3:37 AM CDT	Areal Flood Advisory	OUN	Archer, Clay, Wichita	113 min

Nearby

Severe Thunderstorm Warnings in Texas, 2016 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.