Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 252, NWS Norman, OK

August 18, 2014Garfield County, Grant County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 18, 2014, 4:19 PM CDT for Garfield County, Grant County, Oklahoma. It was in force for 41 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: Aug 18, 2014, 4:19 PM CDT (21:19 UTC)
Expired: Aug 18, 2014, 5:00 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.5 in
Wind: 70.0 mph

Counties Garfield County, OK, Grant County, OK

The radar

The Vance AFB radar (KVNX), 34 km from the middle of the area, began a volume at 21:21 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
Aug 18, 4:40 PM CDT	TSTM WND GST 65	Kremlin, OK	NICKEL SIZED HAIL

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, 9.3 hours before the alert went out and 149 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: 292 J/kg
Mixed-layer CIN: -280 J/kg
Mixed-layer LCL: 1396 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: -106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

906 
WUUS54 KOUN 182119
SVROUN
OKC047-053-182200-
/O.NEW.KOUN.SV.W.0252.140818T2119Z-140818T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
419 PM CDT MON AUG 18 2014

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL GRANT COUNTY IN NORTHERN OKLAHOMA...
  NORTHWESTERN GARFIELD COUNTY IN NORTHERN OKLAHOMA...

* UNTIL 500 PM CDT

* AT 418 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR KREMLIN...
  MOVING EAST AT 5 MPH.

  HAZARD...70 MPH WIND GUSTS AND PING PONG BALL SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS AND VEHICLES. EXPECT 
           CONSIDERABLE TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO 
           MOBILE HOMES...ROOFS AND OUTBUILDINGS. 

* LOCATIONS IMPACTED INCLUDE...
  ENID...POND CREEK...KREMLIN...BRECKENRIDGE...HILLSDALE...CARRIER
  AND NORTH ENID.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LARGE HAIL AND DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY.
LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3639 9804 3662 9801 3669 9774 3641 9766
TIME...MOT...LOC 2118Z 254DEG 5KT 3653 9787 

HAIL...1.50IN
WIND...70MPH

$$

11

2 follow-up statements

592 
WWUS54 KOUN 182127
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
427 PM CDT MON AUG 18 2014

OKC047-053-182200-
/O.CON.KOUN.SV.W.0252.000000T0000Z-140818T2200Z/
GRANT OK-GARFIELD OK-
427 PM CDT MON AUG 18 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTH CENTRAL GRANT AND NORTHWESTERN GARFIELD COUNTIES...

AT 427 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR KREMLIN...
MOVING EAST AT 10 MPH.

HAZARD...70 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
         TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE 
         HOMES...ROOFS AND OUTBUILDINGS. 

LOCATIONS IMPACTED INCLUDE...
ENID...POND CREEK...KREMLIN...BRECKENRIDGE...HILLSDALE...CARRIER AND
NORTH ENID.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3639 9804 3662 9801 3669 9774 3641 9766
TIME...MOT...LOC 2127Z 259DEG 10KT 3652 9784 

HAIL...1.25IN
WIND...70MPH

$$

11

539 
WWUS54 KOUN 182149
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
449 PM CDT MON AUG 18 2014

OKC053-182159-
/O.CAN.KOUN.SV.W.0252.000000T0000Z-140818T2200Z/
GRANT OK-
449 PM CDT MON AUG 18 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL GRANT COUNTY IS
CANCELLED...
    
THE STORM HAS MOVED OUT OF THE WARNED AREA AND THE WARNING HAS BEEN 
CANCELLED.

LAT...LON 3639 9804 3659 9801 3657 9779 3641 9768
TIME...MOT...LOC 2149Z 031DEG 5KT 3650 9788 

$$

OKC047-182200-
/O.CON.KOUN.SV.W.0252.000000T0000Z-140818T2200Z/
GARFIELD OK-
449 PM CDT MON AUG 18 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR NORTHWESTERN GARFIELD COUNTY...

AT 449 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES SOUTHWEST
OF KREMLIN...MOVING SOUTHWEST AT 5 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...
ENID...KREMLIN...BRECKENRIDGE...HILLSDALE...CARRIER AND NORTH ENID. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3639 9804 3659 9801 3657 9779 3641 9768
TIME...MOT...LOC 2149Z 031DEG 5KT 3650 9788 

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

$$

11

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 1:39 AM CDT	Special Weather Statement	OUN	Grant, Kay	36 min
Aug 18, 2:10 AM CDT	Special Weather Statement	OUN	Garfield, Grant, Kay, Noble	50 min
Aug 18, 2:59 AM CDT	Special Weather Statement	OUN	Kay, Noble	31 min
Aug 18, 3:30 AM CDT	Special Weather Statement	OUN	Noble, Payne	30 min
Aug 18, 4:02 AM CDT	Special Weather Statement	OUN	Cleveland, Lincoln, Logan, Oklahoma	43 min
Aug 18, 5:15 AM CDT	Special Weather Statement	OUN	Logan	30 min
Aug 18, 3:16 PM CDT	Special Weather Statement	OUN	Noble	29 min
Aug 18, 3:26 PM CDT	Special Weather Statement	OUN	Grant	49 min
Aug 18, 3:35 PM CDT	Special Weather Statement	OUN	Alfalfa	25 min
Aug 18, 3:45 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	45 min
Aug 18, 4:01 PM CDT	Special Weather Statement	OUN	Alfalfa	29 min
Aug 18, 4:03 PM CDT	Special Weather Statement	OUN	Noble	27 min
Aug 18, 4:17 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	43 min
Aug 18, 4:35 PM CDT	Special Weather Statement	OUN	Noble	10 min
Aug 18, 4:46 PM CDT	Special Weather Statement	OUN	Noble	14 min
Aug 18, 5:03 PM CDT	Special Weather Statement	OUN	Alfalfa, Garfield, Noble	27 min
Aug 18, 5:14 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	46 min
Aug 18, 5:22 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant	53 min
Aug 18, 5:25 PM CDT	Special Weather Statement	OUN	Garfield	35 min
Aug 18, 5:39 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble, Payne	51 min
Aug 18, 6:01 PM CDT	Special Weather Statement	OUN	Harper	14 min
Aug 18, 6:20 PM CDT	Special Weather Statement	OUN	Canadian, Oklahoma	40 min
Aug 18, 6:24 PM CDT	Special Weather Statement	OUN	Harper	36 min
Aug 18, 6:33 PM CDT	Special Weather Statement	OUN	Logan	27 min
Aug 18, 6:40 PM CDT	Special Weather Statement	OUN	Payne	35 min
Aug 18, 6:45 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woodward	30 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2014 Every severe thunderstorm warning in 2014

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.