Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 686

May 13, 2004McDonald County, Newton County, Missouri; 47 counties in Oklahoma; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 13, 2004, 12:48 PM CDT for McDonald County, Newton County, Missouri; 47 counties in Oklahoma; 10 counties in Texas. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
May 13, 2004, 12:48 PM CDT (17:48 UTC)
Expired
May 13, 2004, 2:45 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 59 counties

McDonald County, MO, Newton County, MO, Adair County, OK, Atoka County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cherokee County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Ottawa County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Wagoner County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Haskell County, TX, Knox County, TX, Montague County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 78 km from the middle of the area, began a volume at 17:50 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Fort Sill, OK (KFSI), launched 12:00Z, 5.8 hours before the alert went out and 61 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 Sill, OK at 12:00Z on 2004-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2125 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Sill, OK at 12:00Z on 2004-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.193958Sfc1 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
2125 J/kg
Mixed-layer CIN
-154 J/kg
Mixed-layer LCL
869 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
53 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.

005 
ACUS11 KWNS 131749
SWOMCD
SPC MCD 131748 
ARZ000-MOZ000-OKZ000-KSZ000-TXZ000-131945-

MESOSCALE DISCUSSION 0686
NWS STORM PREDICTION CENTER NORMAN OK
1248 PM CDT THU MAY 13 2004

AREAS AFFECTED...NWRN TX/SWRN..CNTRL..AND NERN OK

CONCERNING...SEVERE THUNDERSTORM WATCH 198...

VALID 131748Z - 131945Z

SEVERE POTENTIAL REMAINS OVER MUCH OF NORTHWEST TEXAS AND
SOUTHWESTERN ..CENTRAL AND NORTHEASTERN OKLAHOMA WITH MLCAPE VALUES
OF 2500 TO OVER 3000 J/KG ACROSS THE AREA. 

PREVIOUS OUTFLOW BOUNDARY INTERACTIONS HAVE PRODUCED BRIEF STRONG
BUT GENERALLY SHORT LIVED STORMS.  ACTIVITY WILL CONTINUE TO
ORGANIZE ALONG AND AHEAD OF THE FRONT THE NEXT SEVERAL HOURS ALONG
WITH THUNDERSTORMS DEVELOPING IN THE MOIST UNSTABLE AIRMASS OVER THE
SOUTH CENTRAL AND EASTERN PART OF OKLAHOMA.  WIND SHEAR REMAINS
GENERALLY WEAK AT 20 TO 25 KTS. 
MOST LIKELY SEVERE THREAT WILL BE HAIL AND WIND.

..BOTHWELL.. 05/13/2004

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

ATTN...WFO...SGF...TSA...FWD...OUN...SJT...LUB...

33210017 35309932 36509588 37249422 34989434 32750010

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 13, 3:12 AM CDTMesoscale DiscussionSPCBarton, Bates, Cedar, Henry, Jasper, St. Clair and 1 more63 min
May 13, 10:45 AM CDTSevere Thunderstorm WatchSPCMcDonald6 hr
May 13, 2:48 PM CDTMesoscale DiscussionSPCMcDonald, Newton87 min
May 12, 8:04 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Comanche, Cotton, Custer and 7 more86 min
May 12, 9:08 PM CDTMesoscale DiscussionSPCAlfalfa, Dewey, Ellis, Garfield, Grant, Harper and 8 more37 min
May 12, 9:25 PM CDTTornado WatchSPCAlfalfa, Garfield, Grant, Kay, Nowata7 hr
May 12, 11:55 PM CDTMesoscale DiscussionSPCAlfalfa, Garfield, Grant, Kay, Nowata, Osage2 hr
May 13, 10:20 AM CDTMesoscale DiscussionSPCAtoka, Blaine, Caddo, Canadian, Carter, Cleveland and 35 more115 min
May 13, 5:01 PM CDTMesoscale DiscussionSPCGarfield, Grant, Kay, Noble, Osage89 min
May 13, 3:52 AM CDTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bastrop, Brazos, Burleson and 27 more83 min
May 13, 8:30 AM CDTTornado WatchSPCAngelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 17 more6 hr
May 13, 9:54 AM CDTMesoscale DiscussionSPCAngelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 17 more96 min
May 13, 12:10 PM CDTTornado WatchSPCAngelina, Austin, Brazoria, Chambers, Colorado, Fayette and 22 more6 hr
May 13, 12:26 PM CDTMesoscale DiscussionSPCBandera, Brown, Callahan, Coke, Coleman, Concho and 26 more2 hr
May 13, 12:55 PM CDTTornado WatchSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more6 hr
May 13, 1:38 PM CDTMesoscale DiscussionSPCAustin, Brazoria, Chambers, Colorado, Fayette, Fort Bend and 15 more97 min
May 13, 2:30 PM CDTTornado WatchSPCAtascosa, Bandera, Bastrop, Bexar, Caldwell, Comal and 21 more6 hr
May 13, 2:57 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more2 hr
May 13, 3:34 PM CDTMesoscale DiscussionSPCAtascosa, Bandera, Bastrop, Bexar, Caldwell, Comal and 21 more86 min
May 13, 5:22 PM CDTMesoscale DiscussionSPCAngelina, Austin, Brazoria, Chambers, Colorado, Fort Bend and 17 more53 min
May 13, 5:54 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Concho, Eastland, Haskell and 14 more96 min
May 13, 6:55 PM CDTSevere Thunderstorm WatchSPCBandera, Edwards, Gillespie, Kerr, Kimble, Mason and 6 more5 hr

Nearby

Mesoscale Discussions in Oklahoma, 2004Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Missouri, 2004Every mesoscale discussion in 2004

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.