Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 256, NWS Norman, OK

May 10, 2006Bryan County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 10, 2006, 2:28 AM 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, 2006, 2:28 AM CDT (07:28 UTC)
Expired: May 10, 2006, 3:00 AM CDT
In force: 32 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Bryan County, OK

The radar

The Norman radar (KTLX), 179 km from the middle of the area, began a volume at 07:29 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 9, 10:46 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 7.5 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-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: 4874 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1628 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 13.1

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 9, 9:05 PM CDT, 5 hours 23 minutes earlier.

Area forecast discussion, May 9, 9:05 PM CDT, 5 hours 23 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
905 PM CDT TUE MAY 9 2006

.UPDATE...
HP SUPERCELLS WITH NUMEROUS REPORTS OF BRIEF TORNADOES/LARGE
HAIL/FLOODING RAINS CONTINUE ACROSS SOUTHEAST OKLAHOMA AT THIS TIME
WITHIN AN AXIS OF EXTREMLY UNSTABLE AIR AND NEAR THE INTERSECTION OF
AN OUTFLOW BOUNDARY AND DRYLINE. OTHER SCATTERED STORMS ARE
DEVELOPING FARTHER NORTH ALONG THE SYNOPTIC SCALE COLD FRONT.
ADDITIONAL STORMS DEVELOPED EARLIER THIS AFTERNOON ACROSS EASTERN
NEW MEXICO/WEST TEXAS DUE TO MOIST/UPSLOPE FLOW WITH THESE STORMS
ABOUT TO ENTER WESTERN PARTS OF THE FORECAST AREA. RUN-TO-RUN MODEL
CONSISTENCY AND UPPER AIR ANALYSIS SHOW GOOD POTENTIAL FOR
WIDESPREAD RAIN OVER THE MAJORITY OF THE FORECAST AREA OVERNIGHT DUE
TO DEEP FRONTOGENESIS AND Q VECTOR CONVERGENCE ACCOMPANYING A WELL
DEFINED SHORTWAVE TROUGH OVER THE ROCKIES. HIGHEST QPF MAY BE JUST
AHEAD OF THE DRYLINE IN SOUTHEAST OKLAHOMA AND ALSO JUST NORTH OF
THE SYNOPTIC COLD FRONT THAT AT THIS TIME HAS ESSENTIALLY STALLED.
FRONT WILL BE REINFORCED LATE TONIGHT AS THE TROUGH PROGRESSES OVER
THE AREA.

RADAR TRENDS SHOW THE POTENTIAL FOR CONTINUED TRAINING OF SUPERCELLS
OVER SOUTHEAST OKLAHOMA...SO A SHORT TERM FLOOD WATCH WAS ISSUED
EARLIER THIS EVENING FOR THE NEXT FEW HOURS. RAIN/SCATTERED
THUNDERSTORMS MAY BE ONGOING AT THE BEGINNING OF THE PERIOD WED
MAINLY IN EASTERN AREAS WITH DRIER/STABLE AIR FILTERING INTO THE
REGION ON WEDNESDAY. INCREASED WIND SPEEDS QUITE A BIT FOR WEDNESDAY
CONSIDERING DEEP SUBSIDENCE AND AN INCREASE IN THE PRESSURE
GRADIENT. UPDATES WERE JUST ISSUED.

JAMES

-----------------------------------------------------
.PREV DISCUSSION... (ISSUED 301 PM CDT TUE MAY 9 2006)

DISCUSSION...
19Z OUN SOUNDING SHOWS COOLING OF CAP LEVEL... BUT 18Z FORT WORTH
CAP STILL GIVES A DECENT AMOUNT OF NEGATIVE AREA. BUT CURRENTLY
THINK THAT WE CAN GET SOME STORMS TO DEVELOP IN THE WARM SECTOR
THIS AFTERNOON. LARGE AMOUNT OF INSTABILITY AVAILABLE SO SEVERE
WEATHER IS LIKELY IF WE CAN GET STORMS TO GO. SURFACE OBS/RADAR/
SATELLITE SHOW FRONT FROM NEAR CUSHING TO OKC SOUTHWEST INTO
SOUTHWEST OKLAHOMA AND DRYLINE IS ORGANIZING JUST EAST OF
INTERSTATE 35 ACROSS SOUTHERN OKLAHOMA... SO INITIAL AREA TO WATCH
IS ACROSS PORTIONS OF CENTRAL AND SOUTHEAST OKLAHOMA ALONG FRONT
AND DRYLINE. IT ALSO APPEARS A MID LEVEL WAVE IS MOVING ACROSS
WESTERN OKLAHOMA WHICH IS ENHANCING CUMULUS FIELD. LATER
TONIGHT... CONVECTION IS EXPECTED TO BECOME WIDESPREAD AND MOVE
FROM WEST TO EAST ACROSS THE AREA AS MAIN UPPER WAVE APPROACHES
THE CENTRAL PLAINS AND PRECIPITATION WILL BE LIKELY IN MANY AREAS
LATER TONIGHT. PRELIMINARY POPS ARE BELOW BUT WILL LIKELY ADJUST
SPECIFIC NUMBERS RIGHT BEFORE ISSUING PRODUCTS.

STILL SOME LINGERING STORMS POSSIBLE EARLY TOMORROW BEFORE THE
UPPER WAVE MOVES FARTHER NORTHEAST. BUT THEN THE UPPER STORM WILL
SIT AND SPIN OVER THE MIDWEST/GREAT LAKES REGION FOR A FEW DAYS
KEEPING FORECAST AREA UNDER A GENERAL NORTHWEST FLOW. THE BEST
CHANCE OF RAIN AFTER THE CURRENT SYSTEM IS ON SATURDAY AND SUNDAY
AS SURFACE COLD FRONT MOVES INTO THE AREA. HAVE KEPT THE REST OF
THE FORECAST DRY BUT WILL HAVE TO WATCH HOW THE SURFACE PATTERN
EVOLVES FROM DAY TO DAY UNDER THE NORTHWEST FLOW. TEMPERATURES
ARE EXPECTED TO REMAIN NEAR OR BELOW NORMAL.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  59  73  48  74 /  60  30   0   0
HOBART OK         58  73  48  75 /  40  20   0   0
WICHITA FALLS TX  61  76  51  77 /  30  20   0   0
GAGE OK           49  69  42  72 /  60  20   0   0
PONCA CITY OK     55  70  46  73 /  70  40   0   0
DURANT OK         66  77  53  76 /  50  30   0   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...FLASH FLOOD WATCH UNTIL 1 AM CDT WEDNESDAY FOR OKZ048-OKZ052.

TX...NONE.

Hazardous weather outlook, May 9, 11:45 PM CDT, 2 hours 43 minutes before

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In the hours before

Special weather statement, May 10, 12:57 AM CDT, 1 hour 31 minutes before

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Local storm report, May 10, 1:10 AM CDT, 1 hour 18 minutes before

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Special weather statement, May 10, 1:22 AM CDT, 1 hour 6 minutes before

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Special weather statement, May 10, 1:56 AM CDT, 32 minutes before

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Special weather statement, May 10, 2:14 AM CDT, 14 minutes before

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Special weather statement, May 10, 2:21 AM CDT, 7 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
May 9, 7:09 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	51 min
May 9, 7:14 PM CDT	Severe Thunderstorm Warning	OUN	Hughes	46 min
May 9, 7:30 PM CDT	Tornado Warning	OUN	Atoka, Coal	45 min
May 9, 7:43 PM CDT	Flash Flood Warning	OUN	Coal	3 hr
May 9, 8:04 PM CDT	Flash Flood Watch	OUN	Atoka, Bryan	5 hr
May 9, 8:12 PM CDT	Tornado Warning	OUN	Atoka	33 min
May 9, 8:18 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	42 min
May 9, 8:22 PM CDT	Severe Thunderstorm Warning	OUN	Coal	38 min
May 9, 8:35 PM CDT	Flash Flood Warning	OUN	Atoka	3 hr
May 9, 8:46 PM CDT	Tornado Warning	OUN	Atoka	15 min
May 9, 9:03 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	42 min
May 9, 9:09 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	51 min
May 9, 9:26 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	64 min
May 9, 9:31 PM CDT	Severe Thunderstorm Warning	OUN	Greer	59 min
May 9, 9:46 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	44 min
May 9, 9:53 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	37 min
May 9, 10:07 PM CDT	Tornado Warning	OUN	Greer, Jackson	38 min
May 9, 10:24 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	36 min
May 9, 10:36 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	54 min
May 9, 10:51 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon	39 min
May 9, 11:05 PM CDT	Severe Thunderstorm Warning	OUN	Washita	40 min
May 9, 11:25 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson	41 min
May 9, 11:48 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	42 min
May 10, 12:14 AM CDT	Severe Thunderstorm Warning	OUN	Comanche	46 min
May 10, 12:22 AM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	38 min
May 10, 12:44 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln	46 min
May 10, 3:21 AM CDT	Severe Thunderstorm Warning	OUN	Bryan	39 min
May 10, 3:25 AM CDT	Severe Thunderstorm Warning	OUN	Harmon	50 min
May 10, 3:37 AM CDT	Severe Thunderstorm Warning	OUN	Washita	38 min
May 10, 3:39 AM CDT	Severe Thunderstorm Warning	OUN	Jackson	51 min
May 10, 3:57 AM CDT	Severe Thunderstorm Warning	OUN	Bryan	23 min
May 10, 4:12 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	48 min
May 10, 4:26 AM CDT	Severe Thunderstorm Warning	OUN	Jackson	14 min
May 10, 4:56 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	15 min
May 10, 4:58 AM CDT	Severe Thunderstorm Warning	OUN	Cotton	47 min
May 10, 5:23 AM CDT	Severe Thunderstorm Warning	OUN	Jefferson	37 min
May 10, 5:26 AM CDT	Severe Thunderstorm Warning	OUN	Stephens	49 min
May 10, 5:47 AM CDT	Severe Thunderstorm Warning	OUN	Love	43 min
May 10, 5:50 AM CDT	Severe Thunderstorm Warning	OUN	Carter	55 min
May 10, 5:58 AM CDT	Severe Thunderstorm Warning	OUN	Jefferson	32 min
May 10, 6:23 AM CDT	Severe Thunderstorm Warning	OUN	Marshall	37 min
May 10, 6:46 AM CDT	Severe Thunderstorm Warning	OUN	Bryan	39 min
May 9, 9:28 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	62 min
May 9, 10:08 PM CDT	Tornado Warning	OUN	Hardeman	39 min
May 9, 10:33 PM CDT	Tornado Warning	OUN	Wilbarger	42 min
May 9, 11:11 PM CDT	Severe Thunderstorm Warning	OUN	Wichita, Wilbarger	49 min
May 9, 11:53 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Clay, Wichita	52 min
May 10, 4:05 AM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	40 min
May 10, 5:07 AM CDT	Severe Thunderstorm Warning	OUN	Clay, Wichita	23 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2006 Every severe thunderstorm warning in 2006

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.