Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 430, NWS Norman, OK

May 27, 20164 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 27, 2016, 7:44 PM CDT for 4 counties in Oklahoma. It was in force for 46 min. 1 report 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: May 27, 2016, 7:44 PM CDT (00:44 UTC)
Expired: May 27, 2016, 8:30 PM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Garvin County, OK, Johnston County, OK, Murray County, OK, Pontotoc County, OK

The radar

The Norman radar (KTLX), 92 km from the middle of the area, began a volume at 00:47 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
May 27, 8:11 PM CDT	HAIL 1	Sulphur, OK

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

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 27, 2:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.7 hours before the alert went out and 84 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: 1799 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1102 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

As transmitted.

023 
WUUS54 KOUN 280044
SVROUN
OKC049-069-099-123-280130-
/O.NEW.KOUN.SV.W.0430.160528T0044Z-160528T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
744 PM CDT FRI MAY 27 2016

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN JOHNSTON COUNTY IN SOUTHEASTERN OKLAHOMA...
  SOUTHWESTERN PONTOTOC COUNTY IN EAST CENTRAL OKLAHOMA...
  NORTHEASTERN MURRAY COUNTY IN SOUTHERN OKLAHOMA...
  SOUTHEASTERN GARVIN COUNTY IN SOUTHERN OKLAHOMA...

* UNTIL 830 PM CDT

* AT 744 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DAVIS...MOVING
  NORTHEAST AT 15 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  SULPHUR...DAVIS...ROFF...HICKORY...SCULLIN AND LAKE OF THE ARBUCKLES. 

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 51 AND 59.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3444 9717 3454 9721 3473 9689 3461 9676
      3447 9677
TIME...MOT...LOC 0044Z 246DEG 15KT 3452 9710 

HAIL...1.00IN
WIND...60MPH
 
$$

KURTZ

3 follow-up statements

209 
WWUS54 KOUN 280051
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
751 PM CDT FRI MAY 27 2016

OKC049-069-099-123-280130-
/O.CON.KOUN.SV.W.0430.000000T0000Z-160528T0130Z/
JOHNSTON OK-PONTOTOC OK-MURRAY OK-GARVIN OK-
751 PM CDT FRI MAY 27 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR NORTHWESTERN JOHNSTON...SOUTHWESTERN PONTOTOC...NORTHEASTERN
MURRAY AND SOUTHEASTERN GARVIN COUNTIES...

AT 750 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DAVIS...MOVING
EAST AT 15 MPH.

HAZARD...PING PONG BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
         DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT WIND 
         DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
SULPHUR...DAVIS...ROFF...HICKORY...SCULLIN AND LAKE OF THE ARBUCKLES. 

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 51 AND 59.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS.

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3444 9717 3454 9721 3473 9689 3461 9676
      3447 9677
TIME...MOT...LOC 0050Z 252DEG 12KT 3451 9709 

TORNADO...POSSIBLE
HAIL...1.50IN
WIND...60MPH
 
$$

KURTZ

613 
WWUS54 KOUN 280107
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
807 PM CDT FRI MAY 27 2016

OKC049-280116-
/O.CAN.KOUN.SV.W.0430.000000T0000Z-160528T0130Z/
GARVIN OK-
807 PM CDT FRI MAY 27 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GARVIN COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 3447 9677 3444 9717 3451 9719 3451 9714
      3453 9716 3464 9698 3464 9693 3467 9693
      3471 9687 3461 9676
TIME...MOT...LOC 0106Z 261DEG 14KT 3450 9706 

$$

OKC069-099-123-280130-
/O.CON.KOUN.SV.W.0430.000000T0000Z-160528T0130Z/
JOHNSTON OK-PONTOTOC OK-MURRAY OK-
807 PM CDT FRI MAY 27 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR NORTHWESTERN JOHNSTON...SOUTHWESTERN PONTOTOC AND NORTHEASTERN
MURRAY COUNTIES...

AT 806 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DAVIS...MOVING
EAST AT 15 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
SULPHUR...DAVIS...ROFF...HICKORY...SCULLIN AND LAKE OF THE ARBUCKLES. 

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 51 AND 55.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS.

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

&&

LAT...LON 3447 9677 3444 9717 3451 9719 3451 9714
      3453 9716 3464 9698 3464 9693 3467 9693
      3471 9687 3461 9676
TIME...MOT...LOC 0106Z 261DEG 14KT 3450 9706 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

KURTZ

703 
WWUS54 KOUN 280109
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
809 PM CDT FRI MAY 27 2016

OKC069-099-123-280130-
/O.CON.KOUN.SV.W.0430.000000T0000Z-160528T0130Z/
JOHNSTON OK-PONTOTOC OK-MURRAY OK-
809 PM CDT FRI MAY 27 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR NORTHWESTERN JOHNSTON...SOUTHWESTERN PONTOTOC AND NORTHEASTERN
MURRAY COUNTIES...

AT 809 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR SULPHUR...MOVING
EAST AT 20 MPH.

HAZARD...TWO INCH HAIL AND 60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
         DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT WIND 
         DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
SULPHUR...DAVIS...ROFF...HICKORY...SCULLIN AND LAKE OF THE ARBUCKLES. 

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 51 AND 55.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS.

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3447 9677 3444 9717 3451 9719 3451 9714
      3453 9716 3464 9698 3464 9693 3467 9693
      3471 9687 3461 9676
TIME...MOT...LOC 0109Z 251DEG 16KT 3450 9703 

TORNADO...POSSIBLE
HAIL...2.00IN
WIND...60MPH
 
$$

KURTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:07 PM CDT	Special Weather Statement	OUN	Logan	23 min
May 27, 7:13 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Lincoln, Logan, Oklahoma, Payne	47 min
May 27, 7:23 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble, Payne	52 min
May 27, 7:56 PM CDT	Special Weather Statement	OUN	Garvin	34 min
May 27, 7:57 PM CDT	Flash Flood Warning	OUN	Carter, Garvin, Murray	3 hr
May 27, 7:57 PM CDT	Special Weather Statement	OUN	Kay	33 min
May 27, 7:59 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	46 min
May 27, 8:14 PM CDT	Special Weather Statement	OUN	Noble	31 min
May 27, 8:19 PM CDT	Severe Thunderstorm Warning	OUN	Noble	15 min
May 27, 8:21 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Coal, Garvin, Johnston, Murray, Pontotoc	39 min
May 27, 8:51 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Carter, Coal, Johnston, Marshall, Murray and 1 more	39 min
May 27, 9:26 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Marshall, Murray	30 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.