Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 607, NWS Norman, OK

September 8, 2015Oklahoma County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Sep 8, 2015, 5:19 PM CDT for Oklahoma County, Oklahoma. It was in force for 26 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 8, 2015, 5:19 PM CDT (22:19 UTC)
Expired: Sep 8, 2015, 5:45 PM CDT
In force: 26 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Oklahoma County, OK

The radar

The Norman radar (KTLX), 29 km from the middle of the area, began a volume at 22:21 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.

What was reported inside it

Time	Report	Where	Remark
Sep 8, 5:35 PM CDT	TSTM WND DMG	7 W Edmond, OK	WINDS BLEW DOWN A FEW 3 TO 4 INCHE DIAMETER TREES.
Sep 8, 5:35 PM CDT	TSTM WND DMG	7 W Edmond, OK	WINDS BLEW DOWN A FEW 3 TO 4 INCHE DIAMETER TREES. TIME ESTIMATED FROM RADAR.
Sep 8, 5:35 PM CDT	TSTM WND DMG	7 W Edmond, OK	FENCE BLOWN DOWN AND POST SNAPPED. TIME ESTIMATED FROM RADAR.
Sep 8, 5:48 PM CDT	TSTM WND DMG	2 Sw Arcadia, OK	WINDS CAUSED ROOF DAMAGE TO A BARN.
Sep 8, 5:48 PM CDT	TSTM WND DMG	2 Sw Arcadia, OK	WINDS CAUSED ROOF DAMAGE TO A BARN. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.3 hours before the alert went out and 36 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: 442 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 1570 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

742 
WUUS54 KOUN 082219
SVROUN
OKC109-082245-
/O.NEW.KOUN.SV.W.0607.150908T2219Z-150908T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
519 PM CDT TUE SEP 8 2015

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL OKLAHOMA COUNTY IN CENTRAL OKLAHOMA...

* UNTIL 545 PM CDT

* AT 519 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NORTHWESTERN
  OKLAHOMA CITY...MOVING EAST AT 30 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  OKLAHOMA CITY...EDMOND...MIDWEST CITY...DEL CITY...BETHANY...
  CHOCTAW...WARR ACRES...THE VILLAGE...SPENCER...NICHOLS HILLS...
  JONES...NICOMA PARK...ARCADIA...TINKER AIR FORCE BASE...FOREST
  PARK...WOODLAWN PARK...LAKE ALUMA AND SMITH VILLAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3546 9767 3571 9767 3569 9725 3550 9725
      3542 9731
TIME...MOT...LOC 2219Z 277DEG 28KT 3553 9761 

HAIL...<.75IN
WIND...60MPH
 
$$

MAHALE

1 follow-up statement

769 
WWUS54 KOUN 082235
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
535 PM CDT TUE SEP 8 2015

OKC109-082245-
/O.CON.KOUN.SV.W.0607.000000T0000Z-150908T2245Z/
OKLAHOMA OK-
535 PM CDT TUE SEP 8 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR CENTRAL OKLAHOMA COUNTY...

AT 533 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NORTHEASTERN
OKLAHOMA CITY...MOVING EAST AT 30 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
OKLAHOMA CITY...EDMOND...MIDWEST CITY...DEL CITY...BETHANY...
CHOCTAW...WARR ACRES...THE VILLAGE...SPENCER...NICHOLS HILLS...
JONES...NICOMA PARK...ARCADIA...TINKER AIR FORCE BASE...FOREST
PARK...WOODLAWN PARK...LAKE ALUMA AND SMITH VILLAGE.

THE STRONGEST WINDS WILL AFFECT DOWNTOWN OKLAHOMA CITY TO THE 
NORTHEAST NEAR ARCADIA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3546 9767 3571 9767 3569 9725 3550 9725
      3542 9731
TIME...MOT...LOC 2233Z 277DEG 28KT 3552 9747 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 9:02 PM CDT	Special Weather Statement	OUN	Woods	28 min
Sep 8, 3:55 PM CDT	Special Weather Statement	OUN	Kiowa, Washita	50 min
Sep 8, 4:09 PM CDT	Special Weather Statement	OUN	Kay	51 min
Sep 8, 4:21 PM CDT	Special Weather Statement	OUN	Payne	39 min
Sep 8, 4:38 PM CDT	Special Weather Statement	OUN	Payne	52 min
Sep 8, 4:44 PM CDT	Special Weather Statement	OUN	Greer, Harmon, Kiowa, Washita	31 min
Sep 8, 4:45 PM CDT	Special Weather Statement	OUN	Canadian	30 min
Sep 8, 4:56 PM CDT	Special Weather Statement	OUN	Kay, Noble	49 min
Sep 8, 5:09 PM CDT	Special Weather Statement	OUN	Canadian, Oklahoma	36 min
Sep 8, 5:28 PM CDT	Special Weather Statement	OUN	Grady	47 min
Sep 8, 5:45 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	30 min
Sep 8, 5:58 PM CDT	Special Weather Statement	OUN	Cleveland	32 min
Sep 8, 6:04 PM CDT	Special Weather Statement	OUN	Jefferson, Stephens	41 min
Sep 8, 6:17 PM CDT	Areal Flood Advisory	OUN	Cleveland	118 min
Sep 8, 6:36 PM CDT	Special Weather Statement	OUN	Lincoln	24 min
Sep 8, 6:52 PM CDT	Special Weather Statement	OUN	Garvin, Jefferson, Pottawatomie, Seminole, Stephens	38 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2015 Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.