Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 69, NWS Norman, OK

May 10, 2010Bryan County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 10, 2010, 9:43 PM CDT for Bryan County, Oklahoma. It was in force for 32 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 10, 2010, 9:43 PM CDT (02:43 UTC)
Expired
May 10, 2010, 10:15 PM CDT
In force
32 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

County Bryan County, OK

The radar

The Norman radar (KTLX), 179 km from the middle of the area, began a volume at 02:42 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.

IssuedProductOfficeLasted
May 10, 5:00 PM CDTTornado Watch PDSSPC6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.7 hours before the alert went out and 158 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, Fort Worth, TX at 00:00Z on 2010-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2602 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, Fort Worth, TX at 00:00Z on 2010-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 255 square meters per square second.1939587897Sfc1 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
2602 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
1245 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
255 m²/s²
0-3 km storm-relative helicity
396 m²/s²
Significant tornado parameter
0.0
Supercell composite
10.1

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 May 10, 9:17 PM CDT, 26 minutes earlier.

Area forecast discussion, May 10, 9:17 PM CDT, 26 minutes before
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Hazardous weather outlook, May 10, 8:51 PM CDT, 52 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
851 PM CDT MON MAY 10 2010

OKZ004>048-050>052-TXZ083>090-111000-
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-
851 PM CDT MON MAY 10 2010

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

.DAY ONE...REST OF TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A HIGH RISK OF SEVERE THUNDERSTORMS SOUTHEAST OF A LINE
FROM CALVIN AND ADA... TO ARDMORE OKLAHOMA... TO HENRIETTA TEXAS
THIS EVENING.

TIMING...
MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE THROUGH
MIDNIGHT.

IMPACTS...
THESE STORMS WILL ALSO HAVE THE POTENTIAL TO PRODUCE DAMAGING HAIL
TO THE SIZE OF BASEBALLS AND DAMAGING WIND GUSTS. TORNADOES WILL
ALSO BE POSSIBLE.

RECOMMENDED ACTIONS...
ALL PERSONS SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS AND HAVE A PLAN OF ACTION IN THE EVENT A WARNING IS
ISSUED FOR YOUR LOCATION. STORMS WILL DEVELOP AND MOVE QUICKLY SO
ADVANCE PLANNING IS ESPECIALLY IMPORTANT.

STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD BE PREPARED FOR SEVERE WEATHER OPERATIONS TO
CONTINUE THROUGH THIS EVENING.

DISCUSSION...
THE DRYLINE HAS ADVANCED EASTWARD TO NEAR A STILLWATER TO PAULS
VALLEY TO NEAR ARDMORE OKLAHOMA LINE. THE BOUNDARY HAS SLOWED AND
WILL STALL THIS EVENING. SEVERE STORMS WILL CONTINUE TO DEVELOP
ACROSS PORTIONS OF SOUTH CENTRAL AND SOUTHEAST OKLAHOMA... AND
WESTERN NORTH TEXAS THIS EVENING. LARGE HAIL... STRONG WIND GUSTS...
AND TORNADOES ARE POSSIBLE.

THE OVERALL RISK FOR SEVERE WEATHER WILL GRADUALLY DIMINISH LATE
THIS EVENING. HOWEVER... A FEW THUNDERSTORMS WILL REMAIN POSSIBLE IN
SOUTH CENTRAL AND SOUTHEAST OKLAHOMA OVERNIGHT.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT TUESDAY MAY 11.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
             NWS NORMAN COUNTY WARNING AREA...100 PERCENT
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR..100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THE WEATHER SYSTEM ARRIVING MONDAY WILL LEAVE A FRONTAL BOUNDARY
STALLED ACROSS THE SOUTHERN PLAINS. FROM MID TO LATE WEEK...
ADDITIONAL UPPER-LEVEL DISTURBANCES WILL INTERACT WITH THE
FRONT...MAINTAINING A CHANCE OF SEVERE STORMS AND AN INCREASING
CHANCE OF HEAVY RAINFALL ACCUMULATIONS.

OTHER HAZARDOUS WEATHER...
NONE.

In the hours before

Local storm report, May 10, 8:24 PM CDT, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
824 PM CDT MON MAY 10 2010

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

0815 PM     HAIL             5 S FITTSTOWN           34.55N 96.63W
05/10/2010  E1.00 INCH       PONTOTOC           OK   EMERGENCY MNGR

&&

RILEY
Local storm report, May 10, 8:30 PM CDT, 1 hour 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
830 PM CDT MON MAY 10 2010

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

0810 PM     TORNADO          3 S MILL CREEK          34.36N 96.82W
05/10/2010                   JOHNSTON           OK   EMERGENCY MNGR

&&

RILEY
Local storm report, May 10, 8:52 PM CDT, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
852 PM CDT MON MAY 10 2010

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

0850 PM     TORNADO          3 S COLEMAN             34.23N 96.42W
05/10/2010                   JOHNSTON           OK   EMERGENCY MNGR

&&

RILEY
Local storm report, May 10, 9:01 PM CDT, 42 minutes before
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Local storm report, May 10, 9:04 PM CDT, 39 minutes before
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Local storm report, May 10, 9:14 PM CDT, 29 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 7:00 PM CDTTornado WarningOUNAtoka, Bryan, Johnston, Marshall50 min
May 10, 7:06 PM CDTTornado WarningOUNBryan, Marshall54 min
May 10, 7:13 PM CDTTornado WarningOUNGarvin, McClain, Murray, Pontotoc62 min
May 10, 7:25 PM CDTSevere Thunderstorm WarningOUNHughes, McClain, Pontotoc, Pottawatomie, Seminole50 min
May 10, 7:26 PM CDTTornado WarningOUNCarter, Garvin, Johnston, Murray, Pontotoc49 min
May 10, 7:45 PM CDTTornado WarningOUNHughes, Pontotoc, Seminole45 min
May 10, 7:53 PM CDTTornado WarningOUNBryan67 min
May 10, 8:04 PM CDTTornado WarningOUNAtoka, Bryan, Carter, Coal, Johnston, Marshall and 1 more56 min
May 10, 8:05 PM CDTSevere Thunderstorm WarningOUNCarter, Jefferson, Johnston, Love, Marshall55 min
May 10, 8:09 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal, Hughes, Johnston, Pontotoc66 min
May 10, 8:17 PM CDTTornado WarningOUNCarter, Johnston, Love, Marshall43 min
May 10, 8:54 PM CDTTornado WarningOUNAtoka, Bryan51 min
May 10, 9:00 PM CDTSevere Thunderstorm WarningOUNBryan, Love, Marshall60 min
May 10, 9:59 PM CDTSevere Thunderstorm WarningOUNBryan48 min
May 11, 5:52 PM CDTSevere Thunderstorm WarningOUNBeckham, Custer, Washita24 min
May 10, 8:35 PM CDTTornado WarningOUNClay40 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2010Every 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.