Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 589, NWS Norman, OK

September 28, 2005Hughes County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Sep 28, 2005, 3:55 PM CDT for Hughes County, Oklahoma. It was in force for 50 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: Sep 28, 2005, 3:55 PM CDT (20:55 UTC)
Expired: Sep 28, 2005, 4:45 PM CDT
In force: 50 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Hughes County, OK

The radar

The Norman radar (KTLX), 99 km from the middle of the area, began a volume at 20:56 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

Norman, OK (KOUN), launched 12:00Z, 8.9 hours before the alert went out and 106 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: 1524 J/kg
Mixed-layer CIN: -275 J/kg
Mixed-layer LCL: 997 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 Sep 28, 2:40 PM CDT, 1 hour 15 minutes earlier.

Area forecast discussion, Sep 28, 2:40 PM CDT, 1 hour 15 minutes before

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Hazardous weather outlook, Sep 28, 11:55 AM CDT, 4 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1155 AM CDT WED SEP 28 2005

OKZ004>048-050>052-TXZ083>090-291300-

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
THROUGH EARLY EVENING ACROSS PARTS OF SOUTHEAST OKLAHOMA.

LOCATION...
THE SLIGHT RISK AREA IS SOUTH AND EAST OF A LINE FROM MARIETTA...TO
ARDMORE...TO ADA...TO DUSTIN.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM 3 PM
THROUGH 6 PM.

IMPACTS...
DAMAGING WIND GUSTS TO 65 MPH AND HAIL TO 1 INCH IN DIAMETER WILL BE
POSSIBLE. .

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL IN THE
SLIGHT RISK AREA SHOULD MONITOR LOCAL WEATHER CONDITIONS AND THE
LATEST FORECAST INFORMATION THROUGHOUT THE DAY...AND PLAN FOR
POSSIBLE SEVERE WEATHER OPERATIONS FROM 2 PM UNTIL 6 PM. EMERGENCY
MANAGERS ACROSS THE REST OF OKLAHOMA AND WESTERN NORTH TEXAS SHOULD
CONSIDER POSSIBLE IMPACTS FROM STRONG NORTHERLY GRADIENT WINDS FROM
LATE MORNING THROUGH EARLY TO MID EVENING.

DISCUSSION...
A STRONG COLD FRONT WILL MOVE SOUTHEAST ACROSS CENTRAL AND SOUTHERN
OKLAHOMA AND WESTERN NORTH TEXAS THIS AFTERNOON INTO THE EARLY
EVENING HOURS. LOW LEVEL MOISTURE WILL CONTINUE TO SURGE NORTHWARD
ACROSS CENTRAL AND EASTERN OKLAHOMA TODAY AHEAD OF THE FRONT. THIS
MOISTURE...COMBINED WITH DAYTIME HEATING...WILL RESULT IN MODERATELY
UNSTABLE CONDITIONS AHEAD OF THE COLD FRONT BY MID AFTERNOON IN
SOUTHEAST OKLAHOMA. THUNDERSTORMS MAY DEVELOP ALONG THE FRONT AROUND
MID AFTERNOON AND MOVE SOUTHEAST ACROSS THE SLIGHT RISK AREA DURING
THE LATE AFTERNOON...EVENTUALLY MOVING OUT OF SOUTHEAST OKLAHOMA BY
EARLY EVENING. INSTABILITY AND VERTICAL WIND SHEAR WILL SUPPORT A FEW
SEVERE THUNDERSTORMS. DAMAGING THUNDERSTORM WINDS WILL BE THE MAIN
CONCERN...BUT LARGE HAIL ALSO WILL BE POSSIBLE.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT THURSDAY SEP 29.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...50 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...50 PERCENT.

OTHER HAZARDOUS WEATHER...
STRONG WINDS WILL CREATE POTENTIALLY HAZARDOUS CONDITIONS FOR PARTS
OF THE AREA. A WIND ADVISORY IS IN EFFECT. PLEASE REFER TO THE
LATEST VERSION OF THIS PRODUCT FOR MORE INFORMATION.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORMS WILL BE POSSIBLE FROM FRIDAY THROUGH SUNDAY...AS AN
UPPER LEVEL SYSTEM MOVES FROM THE CENTRAL ROCKIES INTO THE SOUTHERN
PLAINS.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT
7 AM CDT THURSDAY... SEPTEMBER 29TH.

SIX

In the hours before

Special weather statement, Sep 28, 2:10 PM CDT, 1 hour 45 minutes before

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Special weather statement, Sep 28, 3:37 PM CDT, 18 minutes before

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Special weather statement, Sep 28, 3:50 PM CDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 4:21 AM CDT	Wind Advisory	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 27 more	15 hr
Sep 28, 4:38 PM CDT	Severe Thunderstorm Warning	OUN	Coal	31 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2005 Every severe thunderstorm warning in 2005

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.