Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 1018

May 16, 200316 counties in Arkansas; 4 counties in Missouri; 8 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 16, 2003, 5:47 AM CDT for 16 counties in Arkansas; 4 counties in Missouri; 8 counties in Oklahoma. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: May 16, 2003, 5:47 AM CDT (10:47 UTC)
Expired: May 16, 2003, 6:45 AM CDT
In force: 58 min
Issued by: the Storm Prediction Center

All 28 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Howard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Washington County, AR, Yell County, AR, Barry County, MO, McDonald County, MO, Newton County, MO, Stone County, MO, Adair County, OK, Cherokee County, OK, Delaware County, OK, Haskell County, OK, LeFlore County, OK, McCurtain County, OK, Ottawa County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 58 km from the middle of the area, began a volume at 10:50 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 10.8 hours before the alert went out and 146 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: 341 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1169 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

590 
ACUS11 KWNS 161047
SWOMCD
SPC MCD 161047 
ARZ000-MOZ000-OKZ000-KSZ000-TXZ000-161145-

MESOSCALE DISCUSSION 1018
NWS STORM PREDICTION CENTER NORMAN OK
0547 AM CDT FRI MAY 16 2003

AREAS AFFECTED...FAR ERN OK/FAR SWRN MO/WRN AR

CONCERNING...SEVERE THUNDERSTORM WATCH 390...

VALID 161047Z - 161145Z

DAMAGING WIND THREAT WILL CONTINUE THROUGH 12Z OVER THE CENTRAL AND
NRN PORTION OF WW 390...AND BETWEEN 11-13Z OVER THE SRN PORTION.

OBJECTIVE ANALYSES CONTINUE TO SHOW THE AIR MASS DOWNSTREAM OF TWO
FAST MOVING SQUALL LINES REMAINS MODERATELY UNSTABLE...SUPPORTING A
CONTINUATION OF DAMAGING WINDS EWD THROUGH FAR ERN OK INTO SWRN
MO/WRN AR.

..PETERS.. 05/16/2003

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

ATTN...WFO...LZK...SGF...SHV...TSA...

35969525 36729519 37029504 37009338 33849322 33879511

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 16, 4:04 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Clark, Crawford, Franklin and 17 more	56 min
May 16, 4:25 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Crawford, Franklin, Howard, Johnson and 10 more	5 hr
May 16, 6:35 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clark, Cleburne and 36 more	25 min
May 16, 6:50 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Baxter, Boone, Cleburne, Cleveland, Conway and 27 more	4 hr
May 16, 7:42 AM CDT	Mesoscale Discussion	SPC	Arkansas, Baxter, Boone, Cleburne, Cleveland, Conway and 26 more	63 min
May 16, 9:16 AM CDT	Mesoscale Discussion	SPC	Howard, Little River, Polk, Sevier	119 min
May 16, 9:39 AM CDT	Mesoscale Discussion	SPC	Clay, Crittenden, Mississippi	96 min
May 16, 12:09 PM CDT	Mesoscale Discussion	SPC	Bradley, Calhoun, Clark, Cleveland, Columbia, Conway and 28 more	3 hr
May 16, 12:45 PM CDT	Tornado Watch	SPC	Bradley, Calhoun, Clark, Cleburne, Cleveland, Columbia and 33 more	5 hr
May 16, 2:12 PM CDT	Mesoscale Discussion	SPC	Arkansas, Baxter, Boone, Clark, Clay, Cleburne and 44 more	93 min
May 16, 2:50 PM CDT	Tornado Watch	SPC	Arkansas, Ashley, Chicot, Clay, Craighead, Crittenden and 16 more	7 hr
May 16, 3:18 PM CDT	Mesoscale Discussion	SPC	Clark, Garland, Hempstead, Hot Spring, Howard, Little River and 11 more	117 min
May 16, 3:34 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Fulton, Izard and 6 more	116 min
May 16, 3:55 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Fulton, Independence and 8 more	6 hr
May 16, 5:06 PM CDT	Mesoscale Discussion	SPC	Bradley, Calhoun, Clark, Cleburne, Cleveland, Columbia and 33 more	54 min
May 16, 5:45 PM CDT	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 40 more	6 hr
May 16, 5:59 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Chicot, Clay, Craighead, Crittenden and 13 more	91 min
May 16, 6:39 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clay, Cleburne and 20 more	2 hr
May 15, 8:38 PM CDT	Mesoscale Discussion	SPC	Cotton, Jackson, Jefferson, Stephens, Tillman	2 hr
May 15, 10:25 PM CDT	Tornado Watch	SPC	Cotton, Jackson, Jefferson, Stephens, Tillman	6 hr
May 15, 10:30 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 8 more	2 hr
May 15, 11:32 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	118 min
May 15, 11:35 PM CDT	Tornado Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 13 more	4 hr
May 15, 11:49 PM CDT	Mesoscale Discussion	SPC	Cotton, Jackson, Jefferson, Stephens, Tillman	86 min
May 16, 1:20 AM CDT	Tornado Watch	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 33 more	6 hr
May 16, 1:22 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Custer and 16 more	53 min
May 16, 2:33 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 16 more	57 min
May 16, 3:07 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 33 more	53 min
May 16, 5:22 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Coal, Johnston, Latimer and 10 more	53 min
May 16, 11:35 AM CDT	Mesoscale Discussion	SPC	Caddo, Canadian, Cleveland, Creek, Garfield, Grady and 20 more	2 hr
May 16, 12:00 PM CDT	Tornado Watch	SPC	Adair, Canadian, Cherokee, Craig, Creek, Delaware and 23 more	6 hr
May 16, 1:46 PM CDT	Mesoscale Discussion	SPC	Cherokee, Creek, Lincoln, Logan, McIntosh, Mayes and 12 more	89 min

Nearby

Mesoscale Discussions in Arkansas, 2003 Mesoscale Discussions in Oklahoma, 2003 Mesoscale Discussions in Missouri, 2003 Every mesoscale discussion in 2003

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.