Alert archive / Arkansas / Mesoscale Discussions in 2006
Mesoscale Discussion 657
The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2006, 7:20 PM CDT for 5 states. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2006, 7:20 PM CDT (00:20 UTC)
- Expired
- Apr 25, 2006, 8:15 PM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 67 counties
Baxter County, AR, Clay County, AR, Cleburne County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Alexander County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Trigg County, KY, Butler County, MO, Carter County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN
The nearest sounding before it
Little Rock, AR (KLZK), launched 00:00Z, 0.3 hours before the alert went out and 180 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.
- Mixed-layer CAPE
- 890 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 770 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 8:45 PM CDT | Mesoscale Discussion | SPC | Columbia, Union | 90 min |
| Apr 25, 10:01 PM CDT | Mesoscale Discussion | SPC | Crittenden | 59 min |
| Apr 26, 1:23 AM CDT | Mesoscale Discussion | SPC | Chicot | 2 hr |
| Apr 25, 9:13 PM CDT | Mesoscale Discussion | SPC | Carter, Johnson, Unicoi | 2 hr |
Nearby
Mesoscale Discussions in Arkansas, 2006Mesoscale Discussions in Tennessee, 2006Mesoscale Discussions in Kentucky, 2006Every mesoscale discussion in 2006
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.