Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 76, NWS Norman, OK

May 12, 2010Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 12, 2010, 4:08 PM CDT for Woodward County, Oklahoma. It was in force for 52 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: May 12, 2010, 4:08 PM CDT (21:08 UTC)
Expired: May 12, 2010, 5:00 PM CDT
In force: 52 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Woodward County, OK

The radar

The Vance AFB radar (KVNX), 108 km from the middle of the area, began a volume at 21:10 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 12, 2:41 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 9.1 hours before the alert went out and 160 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: 1070 J/kg
Mixed-layer CIN: -168 J/kg
Mixed-layer LCL: 805 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 May 12, 3:07 PM CDT, 1 hour 1 minute earlier.

Area forecast discussion, May 12, 3:07 PM CDT, 1 hour 1 minute before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
307 PM CDT WED MAY 12 2010

.DISCUSSION...
A COLD FRONT OVER THE FAR NORTHWEST PART OF OUR FORECAST AREA WILL
MOVE SOUTHEAST OVERNIGHT... THEN SLOW SIGNIFICANTLY TOMORROW
MORNING AS IT MOVES INTO SOUTHEAST OKLAHOMA. THERE IS... OF
COURSE... A GOOD CHANCE OF QUITE A FEW SEVERE STORMS THIS
EVENING... AND SUBSTANTIAL RAINFALL OVERNIGHT AS MOISTURE
CONTINUES TO BE FORCED NORTHWARD OVER THE FRONTAL SURFACE.

THE FRONT WILL REMAIN IN THE GENERAL VICINITY OF THE SOUTHEAST
PART OF OUR FORECAST AREA INTO THE WEEKEND... SO RAIN CHANCES WILL
REMAIN FAIRLY HIGH... AND THE HIGHEST CHANCES WILL BE MOSTLY
ACROSS THE SOUTHEAST 2/3 OR SO OF OUR AREA... WITH SOME DAY-TO-DAY
VARIATIONS. RAIN CHANCES SLOWLY DECREASE INTO EARLY NEXT WEEK AS
THE FORCING WEAKENS.

HIGH PRESSURE MAY BE FORCEFUL ENOUGH TO SHUT OFF THE RAIN BY MID-
WEEK.

TEMPERATURES WILL DROP SIGNIFICANTLY WITH THE PASSAGE OF THE COLD
FRONT TONIGHT AND TOMORROW. THE EXPECTED RAIN BAND ALONG/NORTHWEST
OF THE FRONT WILL FURTHER COOL TEMPERATURES TOMORROW. AS A
RESULT... THURSDAY WILL BE A CHILLY DAMP DAY FOR THE MOST PART
ACROSS ABOUT THE SOUTHEAST HALF OF OUR AREA. RELATIVELY COOL
DAYTIME TEMPERATURES WILL PERSIST INTO THE WEEKEND AS CLOUD COVER
REMAINS THICK OVERHEAD.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  54  67  55  74 /  60  60  30  40
HOBART OK         47  69  53  71 /  50  40  30  50
WICHITA FALLS TX  59  70  59  75 /  50  60  60  60
GAGE OK           43  70  42  67 /  30  20  10  50
PONCA CITY OK     50  66  49  74 /  60  60  20  20
DURANT OK         69  74  61  78 /  40  60  60  60

&&

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

25/23

Hazardous weather outlook, May 12, 12:00 PM CDT, 4 hours 8 minutes before

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In the hours before

Special weather statement, May 12, 1:45 PM CDT, 2 hours 23 minutes before

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Special weather statement, May 12, 2:00 PM CDT, 2 hours 8 minutes before

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Special weather statement, May 12, 2:21 PM CDT, 1 hour 47 minutes before

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Special weather statement, May 12, 3:20 PM CDT, 48 minutes before

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Special weather statement, May 12, 4:00 PM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
400 PM CDT WED MAY 12 2010

OKZ036-037-TXZ083-085-122130-
JACKSON OK-TILLMAN OK-HARDEMAN TX-WILBARGER TX-
400 PM CDT WED MAY 12 2010

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR JACKSON...TILLMAN AND FAR
NORTHERN WILBARGER COUNTIES.

AT 400 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 16 MILES SOUTHWEST
OF ODELL...MOVING NORTH AT 50 MPH ANOTHER SEVERE THUNDERSTORM WAS
LOCATED SOUTH OF LOCKETT.

MONITOR THE SITUATION CLOSELY. BE READY TO
ACT QUICKLY IF A WARNING IS ISSUED OR STORMS THREATEN YOU.

LAT...LON 3472 9956 3447 9866 3420 9894 3440 9963

Local storm report, May 12, 4:06 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
406 PM CDT WED MAY 12 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0404 PM     HAIL             CHILLICOTHE             34.26N 99.51W
05/12/2010  E1.00 INCH       HARDEMAN           TX   EMERGENCY MNGR

&&

JB/AG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:47 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Woodward	58 min
May 11, 8:21 PM CDT	Tornado Warning	OUN	Woodward	39 min
May 11, 8:58 PM CDT	Tornado Warning	OUN	Woodward	35 min
May 12, 3:00 PM CDT	Severe Thunderstorm Warning	OUN	Woods	60 min
May 12, 3:52 PM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	53 min
May 12, 4:19 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Tillman	41 min
May 12, 4:46 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	59 min
May 12, 4:53 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Kiowa, Washita	17 min
May 12, 5:00 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	45 min
May 12, 5:09 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	66 min
May 12, 5:42 PM CDT	Tornado Warning	OUN	Beckham, Roger Mills	48 min
May 12, 5:46 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods, Woodward	59 min
May 12, 6:02 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon	43 min
May 12, 6:12 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer	48 min
May 12, 6:19 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Roger Mills	56 min
May 12, 6:23 PM CDT	Tornado Warning	OUN	Beckham, Greer, Harmon	52 min
May 12, 6:23 PM CDT	Tornado Warning	OUN	Roger Mills	37 min
May 12, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Woods	44 min
May 12, 6:57 PM CDT	Tornado Warning	OUN	Beckham, Greer, Harmon	48 min
May 12, 3:23 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Foard, Hardeman, Knox, Wilbarger	52 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2010 Every severe thunderstorm warning in 2010

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.