Alert archive / Oklahoma / Mesoscale Discussions in 2010

Mesoscale Discussion 621

May 19, 201013 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 19, 2010, 5:32 AM CDT for 13 counties in Oklahoma. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: May 19, 2010, 5:32 AM CDT (10:32 UTC)
Expired: May 19, 2010, 6:30 AM CDT
In force: 58 min
Issued by: the Storm Prediction Center

Counties Alfalfa County, OK, Creek County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK

The radar

The Vance AFB radar (KVNX), 36 km from the middle of the area, began a volume at 10:35 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

Lamont, OK (KLMN), launched 00:00Z, 10.5 hours before the alert went out and 31 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1300 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

817 
ACUS11 KWNS 191032
SWOMCD
SPC MCD 191032 
OKZ000-191130-

MESOSCALE DISCUSSION 0621
NWS STORM PREDICTION CENTER NORMAN OK
0532 AM CDT WED MAY 19 2010

AREAS AFFECTED...NRN OK

CONCERNING...SEVERE THUNDERSTORM WATCH 189...

VALID 191032Z - 191130Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 189
CONTINUES.

WELL ORGANIZED MCS HAS EVOLVED OVER NRN OK WITH AN MCV NOW EVIDENT
ALONG THE WOODS/ALFALFA COUNTY LINE.  ATTENDANT BOWING TYPE SQUALL
LINE IS BEGINNING TO SURGE EWD AT ROUGHLY 35KT WITH THE APEX NOW
INTO WRN GARFIELD COUNTY.  MESONET DATA INDICATES WIND SPEEDS ARE
GUSTING ABOVE 50 MPH WITH THIS ACTIVITY AND NEAR-SEVERE GUSTS MAY
DEVELOP OVER THE NEXT HOUR AS SQUALL LINE MATURES.  GIVEN CURRENT
SPEED/MOVEMENT...MCS SHOULD SPREAD ACROSS THE REMAINDER OF WW INTO
NERN OK OVER THE NEXT 2-4 HOURS.

..DARROW.. 05/19/2010

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...TSA...OUN...

LAT...LON   36969857 36929604 35849609 36009977 36969857

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 7:41 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	64 min
May 18, 9:27 PM CDT	Mesoscale Discussion	SPC	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 6 more	93 min
May 18, 10:36 PM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Dewey, Ellis, Harper, Roger Mills and 2 more	54 min
May 18, 10:49 PM CDT	Tornado Watch	SPC	Beaver, Beckham, Cimarron, Custer, Dewey, Ellis and 7 more	5 hr
May 19, 1:24 AM CDT	Mesoscale Discussion	SPC	Beaver, Beckham, Cimarron, Custer, Dewey, Ellis and 6 more	66 min
May 19, 3:23 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Creek, Custer, Dewey, Ellis and 13 more	67 min
May 19, 3:42 AM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beaver, Blaine, Creek, Custer, Dewey and 25 more	6 hr
May 19, 1:22 PM CDT	Mesoscale Discussion	SPC	Atoka, Beckham, Blaine, Bryan, Caddo, Canadian and 43 more	113 min
May 19, 2:06 PM CDT	Tornado Watch PDS	SPC	Atoka, Beckham, Blaine, Bryan, Caddo, Canadian and 50 more	8 hr
May 19, 3:20 PM CDT	Mesoscale Discussion	SPC	Atoka, Beckham, Blaine, Bryan, Caddo, Canadian and 43 more	85 min
May 19, 5:30 PM CDT	Mesoscale Discussion	SPC	Atoka, Caddo, Canadian, Cleveland, Coal, Comanche and 31 more	60 min

Nearby

Mesoscale Discussions in Oklahoma, 2010 Every mesoscale discussion 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.