Alert archive / Arkansas / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 169, NWS Little Rock, AR
NWS Little Rock, AR issued this severe thunderstorm warning at May 11, 2017, 3:04 PM CDT for Johnson County, Logan County, Arkansas. It was in force for 56 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
- May 11, 2017, 3:04 PM CDT (20:04 UTC)
- Expired
- May 11, 2017, 4:00 PM CDT
- In force
- 56 min
- Issued by
- NWS Little Rock, AR
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Johnson County, AR, Logan County, AR
The radar
The Western Arkansas radar (KSRX), 71 km from the middle of the area, began a volume at 20:02 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
Springfield, MO (KSGF), launched 12:00Z, 8.1 hours before the alert went out and 169 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1011 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 11, 1:38 PM CDT, 1 hour 26 minutes earlier.
Area forecast discussion, May 11, 1:38 PM CDT, 1 hour 26 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, May 11, 5:00 AM CDT, 10 hours 4 minutes before
Hazardous Weather Outlook National Weather Service Little Rock AR 500 AM CDT Thu May 11 2017 ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-121000- Boone-Marion-Baxter-Fulton-Sharp-Newton-Searcy-Stone-Izard- Independence-Johnson-Pope-Van Buren-Cleburne-Jackson-Logan-Conway- Faulkner-White-Woodruff-Scott-Yell-Perry-Polk-Montgomery-Garland- Saline-Pulaski-Lonoke-Prairie-Monroe-Pike-Clark-Hot Spring-Grant- Jefferson-Arkansas-Dallas-Cleveland-Lincoln-Desha-Ouachita-Calhoun- Bradley-Drew- 500 AM CDT Thu May 11 2017 This Hazardous Weather Outlook is for a Large Part of Arkansas. .DAY ONE...Today and Tonight A storm system in the southern plains will be moving towards the state today with scattered showers and thunderstorms increasing as the day progresses. The associated cold front will enter the western part of the state this afternoon. A line of showers and thunderstorms is expected to develop along the boundary as it crosses the state through the evening hours. Some of the storms could be strong to possibly severe with large hail and damaging winds will be the primary concern. A general inch to an inch and a half of rain is expected with this system. Some locally heavy rainfall may also be seen. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Some lingering chances for thunderstorms will remain in the forecast for Friday as an upper level system moves over the state. While the overall threat for severe weather will remain low...an isolated strong to severe thunderstorms may still be possible. The primary threat with any of these storms on Friday will be large hail. Otherwise...expect the threat for organized severe weather to remain low through the middle of next week. .Spotter Information Statement... Spotter activation may be needed Thursday afternoon to evening. && Visit NWS Little Rock on the web. Go to http://weather.gov/lzk. 56/59
In the hours before
Special weather statement, May 11, 2:22 PM CDT, 42 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 2:22 PM CDT | Special Weather Statement | LZK | Boone | 23 min |
| May 11, 2:37 PM CDT | Severe Thunderstorm Warning | LZK | Boone | 23 min |
| May 11, 2:58 PM CDT | Severe Thunderstorm Warning | LZK | Boone | 32 min |
| May 11, 3:18 PM CDT | Special Weather Statement | LZK | Independence | 57 min |
| May 11, 3:31 PM CDT | Special Weather Statement | LZK | Fulton | 29 min |
| May 11, 3:36 PM CDT | Severe Thunderstorm Warning | LZK | Fulton, Izard | 39 min |
| May 11, 3:36 PM CDT | Severe Thunderstorm Warning | LZK | Johnson, Logan | 39 min |
| May 11, 3:43 PM CDT | Severe Thunderstorm Warning | LZK | Independence, Sharp | 47 min |
| May 11, 3:59 PM CDT | Severe Thunderstorm Warning | LZK | Marion | 46 min |
| May 11, 4:04 PM CDT | Severe Thunderstorm Warning | LZK | Baxter, Izard, Stone | 41 min |
| May 11, 4:15 PM CDT | Tornado Warning | LZK | Baxter, Marion | 30 min |
| May 11, 4:31 PM CDT | Flash Flood Warning | LZK | Johnson, Logan, Pope | 2 hr |
| May 11, 4:35 PM CDT | Special Weather Statement | LZK | Pope, Van Buren | 40 min |
| May 11, 4:36 PM CDT | Severe Thunderstorm Warning | LZK | Baxter, Marion | 39 min |
| May 11, 4:38 PM CDT | Severe Thunderstorm Warning | LZK | Izard, Sharp | 19 min |
| May 11, 4:45 PM CDT | Severe Thunderstorm Warning | LZK | Sharp | 30 min |
| May 11, 5:24 PM CDT | Severe Thunderstorm Warning | LZK | Izard, Sharp | 51 min |
| May 11, 5:38 PM CDT | Special Weather Statement | LZK | Fulton, Sharp | 52 min |
| May 11, 6:23 PM CDT | Special Weather Statement | LZK | Faulkner | 52 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2017Every severe thunderstorm warning 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.