Alert archive / Arkansas / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 300, NWS Little Rock, AR
NWS Little Rock, AR issued this severe thunderstorm warning at Aug 20, 2017, 1:46 PM CDT for Independence County, Sharp County, Arkansas. It was in force for 44 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 20, 2017, 1:46 PM CDT (18:46 UTC)
- Expired
- Aug 20, 2017, 2:30 PM CDT
- In force
- 44 min
- Issued by
- NWS Little Rock, AR
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Independence County, AR, Sharp County, AR
The radar
The Little Rock radar (KLZK), 141 km from the middle of the area, began a volume at 18:46 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
Little Rock, AR (KBYH), launched 12:00Z, 6.8 hours before the alert went out and 190 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
- 2666 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1116 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -22 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 Aug 20, 12:24 PM CDT, 1 hour 22 minutes earlier.
Area forecast discussion, Aug 20, 12:24 PM CDT, 1 hour 22 minutes before
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</html>Hazardous weather outlook, Aug 20, 3:16 AM CDT, 10 hours 30 minutes before
Hazardous Weather Outlook National Weather Service Little Rock AR 316 AM CDT Sun Aug 20 2017 ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-211000- 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- 316 AM CDT Sun Aug 20 2017 This Hazardous Weather Outlook is for a Large Part of Arkansas. .DAY ONE...Today and Tonight Afternoon heat index values will rise to near or just over 105 degrees across much of central and southern Arkansas. Take frequent breaks if working outside...especially during the hottest part of the day. Isolated thunderstorms will also be possible this afternoon across the area. The overall threat for organized severe weather is not expected at this time. However...an isolated strong storm may be seen...with gusty winds and locally heavy rainfall possible with the strongest storms. .DAYS TWO THROUGH SEVEN...Monday Through Saturday Afternoon heat index values of 100 to 105 will be possible over central and southern Arkansas Monday and Tuesday. Take frequent breaks if working outside...especially during the hottest part of the day. Rain chances will increase by late Tuesday...as a cold front moves into the region. At this time...the threat for severe thunderstorms is low. However...isolated storms could become strong...with gusty winds and locally heavy rainfall the primary concerns. Dry weather will return by Thursday...as the front moves south of the region. .Spotter Information Statement... Spotter activation will not be needed. && Visit NWS Little Rock on the web. Go to http://weather.gov/lzk. 62/57
In the hours before
Local storm report, Aug 20, 11:48 AM CDT, 1 hour 58 minutes before
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</html>Special weather statement, Aug 20, 12:31 PM CDT, 1 hour 15 minutes before
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</html>Special weather statement, Aug 20, 12:35 PM CDT, 1 hour 11 minutes before
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</html>Special weather statement, Aug 20, 1:40 PM CDT, 6 minutes before
Special Weather Statement National Weather Service Little Rock AR 140 PM CDT SUN AUG 20 2017 ARZ004-005-201915- Baxter AR-Marion AR- 140 PM CDT SUN AUG 20 2017 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MARION AND NORTHERN BAXTER COUNTIES UNTIL 215 PM CDT... At 140 PM CDT, Doppler radar was tracking a strong thunderstorm over Lakeview in Baxter County, or over Bull Shoals, moving east at 30 mph. Dime size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Mountain Home... Bull Shoals... Gassville... Flippin... Lakeview in Baxter County... Salesville... Briarcliff... Arkawana... Norfork Dam... Ozark Regional Airport... Gamaliel Landing... Fawn Park... Bull Shoals State Park... Colfax... Diamond Bay... Cotter... Midway in Baxter County... Fairview in Marion County... Gamaliel... Robinson Point Landing... PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. If on or near Bull Shoals Lake, get out of the water and move indoors or inside a vehicle. Remember, lightning can strike out to 10 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. && LAT...LON 3627 9265 3640 9266 3650 9221 3624 9223 TIME...MOT...LOC 1840Z 257DEG 28KT 3636 9255 67
The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 10:16 PM CDT | Special Weather Statement | LZK | Boone | 29 min |
| Aug 20, 12:31 PM CDT | Special Weather Statement | LZK | Independence | 44 min |
| Aug 20, 12:35 PM CDT | Special Weather Statement | LZK | Boone | 40 min |
| Aug 20, 1:40 PM CDT | Special Weather Statement | LZK | Baxter | 35 min |
| Aug 20, 2:33 PM CDT | Special Weather Statement | LZK | Jackson | 57 min |
| Aug 20, 5:40 PM CDT | Special Weather Statement | LZK | Monroe | 50 min |
| Aug 20, 5:56 PM CDT | Special Weather Statement | LZK | Logan | 34 min |
| Aug 20, 6:28 PM CDT | Special Weather Statement | LZK | Logan | 32 min |
| Aug 20, 6:40 PM CDT | Flash Flood Warning | LZK | Logan | 2 hr |
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.