Alert archive / Arkansas / Mesoscale Discussions in 2008

Mesoscale Discussion 1609

June 28, 200815 counties in Arkansas; Barry County, McDonald County, Newton County, Missouri; 14 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2008, 10:21 AM CDT for 15 counties in Arkansas; Barry County, McDonald County, Newton County, Missouri; 14 counties in Oklahoma. It was in force for 24 min.

The area

The outline as issued.

The facts

Issued
Jun 28, 2008, 10:21 AM CDT (15:21 UTC)
Expired
Jun 28, 2008, 10:45 AM CDT
In force
24 min
Issued by
the Storm Prediction Center
All 32 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, Washington County, AR, Yell County, AR, Barry County, MO, McDonald County, MO, Newton County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, Muskogee County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Wagoner County, OK

The radar

The Western Arkansas radar (KSRX), 42 km from the middle of the area, began a volume at 15:22 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

Springfield, MO (KSGF), launched 12:00Z, 3.4 hours before the alert went out and 176 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, Springfield, MO at 12:00Z on 2008-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 311 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, Springfield, MO at 12:00Z on 2008-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 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
311 J/kg
Mixed-layer CIN
-160 J/kg
Mixed-layer LCL
555 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
254 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.7

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 28, 2:49 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clay, Fulton and 4 more56 min
Jun 28, 5:26 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Fulton, Madison and 3 more64 min
Jun 28, 10:29 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more5 hr
Jun 28, 1:00 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Johnson, Logan and 5 more90 min
Jun 28, 2:44 PM CDTSevere Thunderstorm WatchSPCFranklin, Howard, Logan, Montgomery, Pike, Polk and 4 more7 hr
Jun 28, 5:32 PM CDTMesoscale DiscussionSPCHempstead, Lafayette, Miller, Nevada88 min
Jun 28, 6:09 PM CDTSevere Thunderstorm WatchSPCCalhoun, Clark, Columbia, Dallas, Hempstead, Lafayette and 5 more7 hr
Jun 27, 8:13 PM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Audrain, Bates, Benton, Boone and 44 more8 hr
Jun 27, 11:26 PM CDTMesoscale DiscussionSPCBarton, Camden, Cedar, Crawford, Dade, Dallas and 26 more94 min
Jun 27, 11:42 PM CDTSevere Thunderstorm WatchSPCBarry, Barton, Benton, Boone, Callaway, Camden and 49 more9 hr
Jun 28, 3:21 AM CDTMesoscale DiscussionSPCAlfalfa, Garfield, Grant, Kay, Kingfisher, Lincoln and 5 more84 min

Nearby

Mesoscale Discussions in Arkansas, 2008Mesoscale Discussions in Oklahoma, 2008Mesoscale Discussions in Missouri, 2008Every mesoscale discussion in 2008

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.