Alert archive / Arkansas / Mesoscale Discussions in 2007

Mesoscale Discussion 1055

June 8, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2007, 6:23 AM CDT for 4 states. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Jun 8, 2007, 6:23 AM CDT (11:23 UTC)
Expired
Jun 8, 2007, 7:30 AM CDT
In force
67 min
Issued by
the Storm Prediction Center
All 36 counties

Baxter County, AR, Clay County, AR, Cleburne County, AR, Franklin County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Johnson County, AR, Lawrence County, AR, Newton County, AR, Pope County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Alexander County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Memphis radar (KNQA), 184 km from the middle of the area, began a volume at 11:23 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 00:00Z, 11.4 hours before the alert went out and 217 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 00:00Z on 2007-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1639 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 00:00Z on 2007-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 square meters per square second.19395878Sfc1 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
1639 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
1110 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
180 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.6
Supercell composite
10.1

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 7, 11:12 PM CDTMesoscale DiscussionSPCBenton, Carroll, Washington93 min
Jun 7, 11:43 PM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more7 hr
Jun 8, 8:32 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Clark, Cleburne and 42 more58 min
Jun 8, 9:03 AM CDTSevere Thunderstorm WatchSPCArkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 38 more7 hr
Jun 8, 2:12 PM CDTMesoscale DiscussionSPCUnion3 hr
Jun 8, 3:25 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Dallas and 11 more95 min
Jun 7, 7:54 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Fulton, Greene and 9 more2 hr
Jun 7, 8:31 PM CDTTornado WatchSPCAdams, Brown, Fulton, Knox, Peoria, Pike and 2 more7 hr
Jun 7, 9:23 PM CDTMesoscale DiscussionSPCBoone, Carroll, Jo Daviess, Lee, McHenry, Mercer and 5 more97 min
Jun 7, 9:48 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 13 more87 min
Jun 7, 10:14 PM CDTTornado WatchSPCBoone, Bureau, Carroll, Cass, Champaign, Christian and 50 more7 hr
Jun 7, 11:26 PM CDTTornado WatchSPCBond, Calhoun, Clinton, Fayette, Greene, Jackson and 10 more8 hr
Jun 8, 8:45 AM CDTSevere Thunderstorm WatchSPCGallatin, Hardin, Massac, Pope6 hr
Jun 8, 8:30 AM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Boone, Bourbon and 77 more90 min
Jun 8, 11:02 AM CDTMesoscale DiscussionSPCAdair, Bath, Bell, Bourbon, Boyd, Breathitt and 44 more58 min
Jun 8, 11:37 AM CDTSevere Thunderstorm WatchSPCAdair, Bath, Bell, Bourbon, Boyd, Boyle and 49 more8 hr
Jun 8, 11:40 AM CDTMesoscale DiscussionSPCAllen, Anderson, Barren, Boone, Bracken, Breckinridge and 36 more65 min
Jun 8, 2:06 PM CDTMesoscale DiscussionSPCAdair, Bath, Bell, Bourbon, Boyd, Boyle and 49 more54 min
Jun 8, 2:27 AM CDTMesoscale DiscussionSPCMcDonald63 min

Nearby

Mesoscale Discussions in Arkansas, 2007Mesoscale Discussions in Missouri, 2007Mesoscale Discussions in Illinois, 2007Every mesoscale discussion in 2007

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.