Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 857, NWS Little Rock, AR
NWS Little Rock, AR issued this severe thunderstorm warning at Aug 24, 2011, 7:45 AM CDT for 7 counties in Arkansas. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 24, 2011, 7:45 AM CDT (12:45 UTC)
- Expired
- Aug 24, 2011, 8:30 AM CDT
- In force
- 45 min
- Issued by
- NWS Little Rock, AR
- Area
- Storm-based polygon
Counties Faulkner County, AR, Lonoke County, AR, Monroe County, AR, Prairie County, AR, Pulaski County, AR, White County, AR, Woodruff County, AR
The radar
The Little Rock radar (KLZK), 48 km from the middle of the area, began a volume at 12:46 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 (KSHV), launched 12:00Z, 0.8 hours before the alert went out and 331 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
- 1956 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1219 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.5
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 23, 6:34 PM CDT, 13 hours 11 minutes earlier.
Area forecast discussion, Aug 23, 6:34 PM CDT, 13 hours 11 minutes before
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</html>The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 3:24 AM CDT | Special Weather Statement | LZK | Sharp | 46 min |
| Aug 24, 3:40 AM CDT | Special Weather Statement | LZK | Marion | 45 min |
| Aug 24, 4:28 AM CDT | Special Weather Statement | LZK | Sharp | 47 min |
| Aug 24, 4:51 AM CDT | Special Weather Statement | LZK | Baxter | 29 min |
| Aug 24, 5:18 AM CDT | Special Weather Statement | LZK | Baxter | 47 min |
| Aug 24, 8:33 AM CDT | Special Weather Statement | LZK | Arkansas, Jefferson, Monroe | 42 min |
| Aug 24, 1:57 PM CDT | Severe Thunderstorm Warning | LZK | Faulkner, Pulaski | 20 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2011Every severe thunderstorm warning in 2011
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.