Alert archive / Mississippi / Mesoscale Discussions in 2010

Mesoscale Discussion 2003

October 26, 201030 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Oct 26, 2010, 11:26 AM CDT for 30 counties in Mississippi. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
Oct 26, 2010, 11:26 AM CDT (16:26 UTC)
Expired
Oct 26, 2010, 12:30 PM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 30 counties

Alcorn County, MS, Attala County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Leflore County, MS, Monroe County, MS, Montgomery County, MS, Oktibbeha County, MS, Pontotoc County, MS, Prentiss County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Columbus AFB radar (KGWX), 135 km from the middle of the area, began a volume at 16:26 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

Little Rock, AR (KLZK), launched 12:00Z, 4.4 hours before the alert went out and 121 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, Little Rock, AR at 12:00Z on 2010-10-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Little Rock, AR at 12:00Z on 2010-10-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -172 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
732 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
-172 m²/s²
0-3 km storm-relative helicity
42 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.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 26, 3:38 AM CDTMesoscale DiscussionSPCAlcorn, Benton, DeSoto, Marshall, Tate, Tippah and 2 more2 hr
Oct 26, 4:05 AM CDTTornado WatchSPCAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more8 hr
Oct 26, 6:00 AM CDTMesoscale DiscussionSPCAlcorn, Benton, Coahoma, DeSoto, Itawamba, Lafayette and 11 more2 hr
Oct 26, 8:54 AM CDTMesoscale DiscussionSPCItawamba, Monroe, Tishomingo66 min
Oct 26, 10:05 AM CDTMesoscale DiscussionSPCAttala, Carroll, Choctaw, Claiborne, Copiah, Hinds and 20 more115 min
Oct 26, 11:42 AM CDTTornado WatchSPCAlcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 35 more7 hr
Oct 26, 3:12 PM CDTMesoscale DiscussionSPCAttala, Choctaw, Claiborne, Clay, Copiah, Hinds and 14 more93 min
Oct 26, 6:32 PM CDTMesoscale DiscussionSPCLowndes58 min

Nearby

Mesoscale Discussions in Mississippi, 2010Every 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.