Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Norman, OK

March 25, 2015Lincoln County, Pottawatomie County, Seminole County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 25, 2015, 7:34 PM CDT for Lincoln County, Pottawatomie County, Seminole County, Oklahoma. It was in force for 41 min. 2 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: Mar 25, 2015, 7:34 PM CDT (00:34 UTC)
Expired: Mar 25, 2015, 8:15 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Lincoln County, OK, Pottawatomie County, OK, Seminole County, OK

The radar

The Norman radar (KTLX), 64 km from the middle of the area, began a volume at 00:37 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
Mar 25, 8:09 PM CDT	TSTM WND DMG	5 N Wewoka, OK	BARN ROOF BLOWN OFF. HWY 9 AND 366
Mar 25, 8:09 PM CDT	TSTM WND DMG	6 N Wewoka, OK	TWO INCH DIAMETER TREE LIMBS BLOWN DOWN BY THUNDERSTORM WINDS.

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
Mar 25, 2:16 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.6 hours before the alert went out and 77 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: 1928 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1591 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 294 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 16.1

Open this sounding in Storm Lab

The text

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

842 
WUUS54 KOUN 260034
SVROUN
OKC081-125-133-260115-
/O.NEW.KOUN.SV.W.0021.150326T0034Z-150326T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
734 PM CDT WED MAR 25 2015

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN SEMINOLE COUNTY IN EAST CENTRAL OKLAHOMA...
  SOUTHEASTERN LINCOLN COUNTY IN CENTRAL OKLAHOMA...
  NORTHERN POTTAWATOMIE COUNTY IN CENTRAL OKLAHOMA...

* UNTIL 815 PM CDT

* AT 733 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR JOHNSON...
  MOVING EAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

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

* LOCATIONS IMPACTED INCLUDE...
  SHAWNEE...SEMINOLE...TECUMSEH...PRAGUE...MEEKER...EARLSBORO...
  CROMWELL...JOHNSON...SPARKS...LITTLE...BETHEL ACRES...CENTERVIEW
  AND AYDELOTTE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3517 9646 3528 9705 3562 9687 3563 9662
      3540 9662 3540 9660 3541 9658 3539 9655
      3539 9653 3544 9657 3543 9651 3543 9649
      3546 9648 3545 9644 3527 9644
TIME...MOT...LOC 0033Z 267DEG 40KT 3542 9685 

HAIL...1.25IN
WIND...60MPH
 
$$

MBS

3 follow-up statements

903 
WWUS54 KOUN 260057
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
757 PM CDT WED MAR 25 2015

OKC081-125-133-260115-
/O.CON.KOUN.SV.W.0021.000000T0000Z-150326T0115Z/
SEMINOLE OK-LINCOLN OK-POTTAWATOMIE OK-
757 PM CDT WED MAR 25 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHERN SEMINOLE...SOUTHEASTERN LINCOLN AND NORTHERN
POTTAWATOMIE COUNTIES...

AT 757 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
OF BOLEY...MOVING EAST AT 45 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...
SHAWNEE...SEMINOLE...TECUMSEH...PRAGUE...MEEKER...EARLSBORO...
CROMWELL...JOHNSON...LITTLE...BETHEL ACRES...CENTERVIEW AND
AYDELOTTE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3528 9705 3538 9698 3557 9679 3563 9662
      3540 9662 3540 9660 3541 9658 3539 9655
      3539 9653 3544 9657 3543 9651 3543 9649
      3546 9648 3545 9644 3527 9644 3517 9646
TIME...MOT...LOC 0057Z 267DEG 40KT 3543 9652 

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

MBS

809 
WWUS54 KOUN 260104
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
804 PM CDT WED MAR 25 2015

OKC081-125-260112-
/O.CAN.KOUN.SV.W.0021.000000T0000Z-150326T0115Z/
LINCOLN OK-POTTAWATOMIE OK-
804 PM CDT WED MAR 25 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LINCOLN AND
NORTHERN POTTAWATOMIE COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED. 
THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
SOUTHEASTERN OKLAHOMA.

LAT...LON 3540 9662 3540 9660 3541 9658 3539 9655
      3539 9653 3544 9657 3543 9651 3543 9649
      3546 9648 3545 9644 3527 9644 3526 9645
      3529 9661
TIME...MOT...LOC 0102Z 267DEG 40KT 3543 9644 

$$

OKC133-260115-
/O.CON.KOUN.SV.W.0021.000000T0000Z-150326T0115Z/
SEMINOLE OK-
804 PM CDT WED MAR 25 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR NORTHEASTERN SEMINOLE COUNTY...

AT 802 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
OF CASTLE...MOVING EAST AT 45 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...
CROMWELL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3540 9662 3540 9660 3541 9658 3539 9655
      3539 9653 3544 9657 3543 9651 3543 9649
      3546 9648 3545 9644 3527 9644 3526 9645
      3529 9661
TIME...MOT...LOC 0102Z 267DEG 40KT 3543 9644 

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

MBS

672 
WWUS54 KOUN 260110
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
810 PM CDT WED MAR 25 2015

OKC133-260120-
/O.EXP.KOUN.SV.W.0021.000000T0000Z-150326T0115Z/
SEMINOLE OK-
810 PM CDT WED MAR 25 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SEMINOLE COUNTY
WILL EXPIRE AT 815 PM CDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
SOUTHEASTERN OKLAHOMA.

LAT...LON 3540 9662 3540 9660 3541 9658 3539 9655
      3539 9653 3544 9657 3543 9651 3543 9649
      3546 9648 3545 9644 3527 9644 3526 9645
      3529 9661
TIME...MOT...LOC 0107Z 267DEG 40KT 3543 9644 

$$

MBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 25, 7:04 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	26 min
Mar 25, 7:05 PM CDT	Special Weather Statement	OUN	Cleveland	25 min
Mar 25, 7:06 PM CDT	Special Weather Statement	OUN	Comanche	24 min
Mar 25, 7:14 PM CDT	Areal Flood Advisory	OUN	Cleveland, McClain, Oklahoma	3 hr
Mar 25, 7:24 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche	51 min
Mar 25, 7:28 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain	47 min
Mar 25, 8:02 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady	43 min
Mar 25, 8:09 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Grady, Stephens	51 min
Mar 25, 8:15 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pottawatomie	45 min
Mar 25, 8:34 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, Hughes, McClain, Pontotoc, Pottawatomie and 1 more	41 min
Mar 25, 8:51 PM CDT	Special Weather Statement	OUN	Hughes	24 min
Mar 25, 8:55 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Grady, Murray, Stephens	50 min
Mar 25, 9:01 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	29 min
Mar 25, 9:05 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Stephens	25 min
Mar 25, 9:11 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Garvin, Hughes, Pontotoc, Pottawatomie, Seminole	64 min
Mar 25, 9:36 PM CDT	Special Weather Statement	OUN	Murray	24 min
Mar 25, 9:42 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Johnston, Murray, Pontotoc	63 min
Mar 25, 10:34 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	56 min
Mar 25, 10:41 PM CDT	Special Weather Statement	OUN	Love, Marshall	34 min
Mar 25, 10:43 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Johnston	62 min
Mar 25, 11:16 PM CDT	Special Weather Statement	OUN	Marshall	29 min
Mar 25, 11:21 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston, Love, Marshall	54 min
Mar 26, 12:08 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	37 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.