Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 512, NWS Norman, OK

June 7, 2015Ellis County, Harper County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 7, 2015, 5:49 PM CDT for Ellis County, Harper County, Oklahoma. It was in force for 41 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
Jun 7, 2015, 5:49 PM CDT (22:49 UTC)
Expired
Jun 7, 2015, 6:30 PM CDT
In force
41 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Ellis County, OK, Harper County, OK

The radar

The Dodge City radar (KDDC), 142 km from the middle of the area, began a volume at 22:48 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.8 hours before the alert went out and 228 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-pSkew-T log-p diagram, Amarillo Airport, TX at 12:00Z on 2015-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 12:00Z on 2015-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
7 J/kg
Mixed-layer CIN
-310 J/kg
Mixed-layer LCL
1568 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jun 7, 5:45 PM CDT, 4 minutes earlier.

Area forecast discussion, Jun 7, 5:45 PM CDT, 4 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
545 PM CDT SUN JUN 7 2015

.AVIATION...
STORMS MAY IMPACT GAG/WWR THIS EVENING BEFORE DISSIPATING.
OTHERWISE... A WEAK FRONT WILL MOVE SOUTH OVERNIGHT INTO
THE DAY ON MONDAY SHIFTING WINDS FROM SOUTH TO NORTH. SOME
MFVR AND PERHAPS IFR CEILINGS MAY OCCUR ACROSS WESTERN/NORTHWEST
OK BEHIND THE FRONT LATE TONIGHT/MONDAY MORNING.

30

&&

.PREV DISCUSSION... /ISSUED 212 PM CDT SUN JUN 7 2015/

.DISCUSSION...
A FRONT FROM KANSAS WILL ARRIVE LATER TONIGHT TO NORTHWEST
OKLAHOMA. AN UPPER LEVEL WAVE MOVING QUICKLY THROUGH THE CENTRAL
PLAINS WILL HELP WITH LIFT AND ASSOCIATED SHOWERS AND
THUNDERSTORMS. AS THE UPPER SUPPORT MOVES AWAY TO THE NORTHEAST,
THE FRONT WILL SAG SLOWLY SOUTH AND RAIN/THUNDERSTORMS WILL
DISSIPATE. HOWEVER, THIS FRONT WILL LIKE SOMEWHERE ACROSS CENTRAL
OKLAHOMA MONDAY AND BRING A SMALL CHANCE FOR
SHOWERS/THUNDERSTORMS MONDAY AFTERNOON. ANY OUTFLOW WILL PROBABLY
PUSH INTO SOUTHERN OKLAHOMA FOR A CHANCE FOR STORMS AGAIN
TUESDAY. BEYOND TONIGHT'S SLIGHT RISK FOR WIND AND HAIL, SEVERE
RISK IS LOW. WEDNESDAY MAY BRING A TEMPORARY REBUILDING OF THE
UPPER RIDGE AND THE LOWEST CHANCE FOR RAIN OF THE WEEK. BY LATE
THURSDAY AND FRIDAY SOUTHWEST FLOW ALOFT AND ANOTHER FRONT FROM
THE NORTH WILL BRING A GOOD CHANCE FOR RAIN AT VARIOUS TIMES
THROUGH THE WEEKEND.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  70  89  69  90 /  20  20  10  20
HOBART OK         69  90  69  91 /  20  20  20  20
WICHITA FALLS TX  70  91  70  92 /  10  10  10  20
GAGE OK           64  87  64  89 /  60  10  20  30
PONCA CITY OK     70  89  67  92 /  40  20  10  10
DURANT OK         71  91  71  92 /   0  10  10  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&

84/09
Hazardous weather outlook, Jun 7, 11:42 AM CDT, 6 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1142 AM CDT SUN JUN 7 2015

OKZ004>048-050>052-TXZ083>090-081800-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-
NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-
BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-
TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-
JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-
FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1142 AM CDT SUN JUN 7 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...THROUGH TONIGHT...

.THUNDERSTORMS...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON
THROUGH LATE TONIGHT ACROSS PORTIONS OF NORTHWESTERN OKLAHOMA.

.LOCATION...
THE SLIGHT RISK AREA IS NORTHWEST OF A LINE FROM GAGE TO MEDFORD
OKLAHOMA. A MARGINAL RISK OF SEVERE STORMS ENCOMPASSES THE SLIGHT
RISK...ALONG AND NORTH OF A LINE FROM CHEYENNE TO PERRY OKLAHOMA.

.TIMING...
7 PM THROUGH 1 AM.

.IMPACTS...
HAIL UP TO THE SIZE OF HALF DOLLARS...
WINDS UP TO 60 MPH...

.DISCUSSION...
A WEAK COLD FRONT WILL MOVE INTO NORTHWESTERN OKLAHOMA LATE
TONIGHT...WHILE AN UPPER LEVEL DISTURBANCE MOVES OVER THE SAME
AREA. THUNDERSTORMS ARE INITIALLY EXPECTED TO DEVELOP ACROSS
PORTIONS OF THE NORTHERN TEXAS PANHANDLE AND OKLAHOMA PANHANDLE
DURING THE LATE AFTERNOON AND EARLY EVENING HOURS...AND THEN
SPREAD EAST SOUTHEAST WITH THE FRONT DURING THE OVERNIGHT HOURS
INTO NORTHWESTERN OKLAHOMA. THE STORMS SHOULD DISSIPATE DURING THE
EARLY MORNING HOURS MONDAY AS THEY SLOWLY SHIFT SOUTHWARD OVER
PORTIONS OF WEST CENTRAL AND NORTH CENTRAL OKLAHOMA.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
NORTHWESTERN OKLAHOMA SHOULD PREPARE FOR SEVERE WEATHER
OPERATIONS SUNDAY EVENING THROUGH SUNDAY NIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...
A FEW STRONG THUNDERSTORMS WILL BE POSSIBLE ACROSS CENTRAL
OKLAHOMA AND PORTIONS OF WESTERN NORTH TEXAS MONDAY AFTERNOON AND
EVENING. THE MAIN THREAT WITH THESE STORMS WILL BE HAIL UP TO THE
SIZE OF QUARTERS AND WIND GUSTS NEARING 60 MPH.

THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE WEEK. ALTHOUGH THE
LIKELIHOOD OF WIDESPREAD SEVERE WEATHER APPEARS LOW AT THE
MOMENT...LOCALIZED FLASH FLOODING MAY BE POSSIBLE BY LATE FRIDAY
NIGHT THROUGH SATURDAY MAINLY WEST OF I35...AS SEVERAL ROUNDS OF
THUNDERSTORMS MOVE OVER THE SAME AREAS.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

03/AUSTIN

In the hours before

Special weather statement, Jun 7, 5:34 PM CDT, 15 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 5:34 PM CDTSpecial Weather StatementOUNHarper26 min
Jun 7, 6:46 PM CDTSpecial Weather StatementOUNHarper, Woodward29 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2015Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.