Alert archive / Arkansas / Mesoscale Discussions in 2019

Mesoscale Discussion 202

March 14, 20194 states

The Storm Prediction Center issued this mesoscale discussion at Mar 14, 2019, 4:47 AM CDT for 4 states. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Mar 14, 2019, 4:47 AM CDT (09:47 UTC)
Expired
Mar 14, 2019, 6:15 AM CDT
In force
88 min
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 41 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Greene County, AR, Jackson County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, St. Francis County, AR, Union County, AR, Woodruff County, AR, Dunklin County, MO, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Panola County, MS, Quitman County, MS, Sunflower County, MS, Tate County, MS, Tunica County, MS, Washington County, MS, Dyer County, TN, Fayette County, TN, Haywood County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 98 km from the middle of the area, began a volume at 09:50 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

Little Rock, AR (KBYH), launched 00:00Z, 9.8 hours before the alert went out and 82 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 00:00Z on 2019-03-14Temperature 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 00:00Z on 2019-03-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 252 square meters per square second.1939587897117Sfc1 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
850 m above ground
0-6 km bulk shear
98 kt
0-1 km storm-relative helicity
252 m²/s²
0-3 km storm-relative helicity
498 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 13, 11:30 PM CDTMesoscale DiscussionSPCHempstead, Howard, Little River, Miller, Pike, Sevier3 hr
Mar 14, 1:59 AM CDTSevere Thunderstorm WatchSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more5 hr
Mar 14, 4:07 AM CDTMesoscale DiscussionSPCColumbia, Hempstead, Lafayette, Miller, Nevada83 min
Mar 14, 5:28 AM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 24 more7 hr
Mar 14, 7:14 AM CDTMesoscale DiscussionSPCArkansas, Chicot, Clay, Craighead, Crittenden, Cross and 12 more2 hr
Mar 14, 10:32 AM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Chickasaw, Clay, Grenada and 15 more58 min
Mar 14, 11:47 AM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Calhoun, Chickasaw, Choctaw and 23 more88 min
Mar 14, 12:11 PM CDTTornado WatchSPCAlcorn, Attala, Calhoun, Chickasaw, Choctaw, Clay and 15 more7 hr
Mar 14, 1:01 PM CDTMesoscale DiscussionSPCAttala, Choctaw, Clay, Lowndes, Monroe, Noxubee and 2 more59 min
Mar 14, 2:10 PM CDTMesoscale DiscussionSPCClarke, Copiah, Covington, Forrest, Jasper, Jefferson Davis and 14 more95 min
Mar 14, 2:58 PM CDTMesoscale DiscussionSPCChickasaw, Choctaw, Clay, Itawamba, Kemper, Leake and 8 more92 min
Mar 14, 2:37 AM CDTMesoscale DiscussionSPCHenry, Obion, Stewart, Weakley83 min

Nearby

Mesoscale Discussions in Arkansas, 2019Mesoscale Discussions in Mississippi, 2019Mesoscale Discussions in Tennessee, 2019Every mesoscale discussion in 2019

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.