Alert archive / Arkansas / Mesoscale Discussions in 2017
Mesoscale Discussion 341
The Storm Prediction Center issued this mesoscale discussion at Mar 27, 2017, 12:44 AM CDT for 14 counties in Arkansas; McCurtain County, Oklahoma; 6 counties in Texas. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2017, 12:44 AM CDT (05:44 UTC)
- Expired
- Mar 27, 2017, 1:45 AM CDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 21 counties
Garland County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sevier County, AR, Yell County, AR, McCurtain County, OK, Bowie County, TX, Cass County, TX, Franklin County, TX, Morris County, TX, Red River County, TX, Titus County, TX
The radar
The Western Arkansas radar (KSRX), 147 km from the middle of the area, began a volume at 05:42 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 nearest sounding before it
Shreveport, LA (KBAD), launched 00:00Z, 5.7 hours before the alert went out and 172 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
- 139 J/kg
- Mixed-layer CIN
- -163 J/kg
- Mixed-layer LCL
- 1965 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 8:49 PM CDT | Severe Thunderstorm Watch | SPC | Crawford, Franklin, Howard, Little River, Logan, Miller and 4 more | 6 hr |
| Mar 27, 11:26 AM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Greene, Mississippi, Poinsett | 3 hr |
| Mar 27, 12:08 PM CDT | Severe Thunderstorm Watch | SPC | Craighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more | 8 hr |
| Mar 27, 1:54 PM CDT | Severe Thunderstorm Watch | SPC | Chicot | 7 hr |
| Mar 27, 3:33 PM CDT | Mesoscale Discussion | SPC | Chicot | 87 min |
| Mar 27, 3:39 PM CDT | Mesoscale Discussion | SPC | Craighead, Crittenden, Cross, Lee, Mississippi, Phillips and 2 more | 2 hr |
| Mar 26, 7:15 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 9 more | 90 min |
| Mar 26, 10:05 PM CDT | Mesoscale Discussion | SPC | Nowata, Washington | 85 min |
| Mar 26, 11:40 PM CDT | Mesoscale Discussion | SPC | Milam, Robertson, Williamson | 95 min |
Nearby
Mesoscale Discussions in Arkansas, 2017Mesoscale Discussions in Texas, 2017Mesoscale Discussions in Oklahoma, 2017Every mesoscale discussion in 2017
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.