Alert archive / Arkansas / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 310, NWS Little Rock, AR
NWS Little Rock, AR issued this severe thunderstorm warning at Jul 11, 2020, 10:39 PM CDT for Logan County, Polk County, Scott County, Arkansas. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 11, 2020, 10:39 PM CDT (03:39 UTC)
- Expired
- Jul 11, 2020, 11:45 PM CDT
- In force
- 66 min
- Issued by
- NWS Little Rock, AR
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Logan County, AR, Polk County, AR, Scott County, AR
The radar
The Western Arkansas radar (KSRX), 41 km from the middle of the area, began a volume at 03:39 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 00:00Z, 3.7 hours before the alert went out and 218 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
- 2598 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1473 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.0
The text
As transmitted.
984
WUUS54 KLZK 120339
SVRLZK
ARC083-113-127-120445-
/O.NEW.KLZK.SV.W.0310.200712T0339Z-200712T0445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Little Rock AR
1039 PM CDT Sat Jul 11 2020
The National Weather Service in Little Rock has issued a
* Severe Thunderstorm Warning for...
Southwestern Logan County in western Arkansas...
Polk County in western Arkansas...
Scott County in western Arkansas...
* Until 1145 PM CDT.
* At 1038 PM CDT, severe thunderstorms were located along a line
extending from Burnville to near Hartford to near Heavener, moving
south at 50 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
* Locations impacted include...
Mena... Booneville...
Waldron... Mansfield...
Magazine... Hatfield...
Blue Mountain... Vandervoort...
Beauchamp... Cardiff...
Mountain Fork... Polk County Fairgrounds...
Mena Intermountain Airport... Mccauley...
Echo... Oliver...
Morgan Springs... Queen Wilhelmina State Park...
Cove... Bates...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3493 9445 3496 9437 3495 9434 3497 9424
3506 9423 3506 9425 3510 9414 3514 9414
3514 9403 3523 9403 3523 9392 3529 9392
3513 9371 3491 9371 3459 9399 3432 9435
3433 9447
TIME...MOT...LOC 0338Z 354DEG 42KT 3518 9422 3498 9440 3489 9464
HAIL...1.00IN
WIND...70MPH
$$
2322 follow-up statements
508
WWUS54 KLZK 120405
SVSLZK
Severe Weather Statement
National Weather Service Little Rock AR
1105 PM CDT Sat Jul 11 2020
ARC083-113-127-120445-
/O.CON.KLZK.SV.W.0310.000000T0000Z-200712T0445Z/
Logan AR-Polk AR-Scott AR-
1105 PM CDT Sat Jul 11 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR SOUTHWESTERN LOGAN...POLK AND SCOTT COUNTIES...
At 1105 PM CDT, severe thunderstorms were located along a line
extending from near Waldron to Queen Wilhelmina State Park to near
Big Cedar, moving south at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Mena... Booneville...
Waldron... Mansfield...
Hatfield... Vandervoort...
Beauchamp... Cardiff...
Mountain Fork... Polk County Fairgrounds...
Mena Intermountain Airport... Mccauley...
Echo... Oliver...
Morgan Springs... Queen Wilhelmina State Park...
Cove... Bates...
Acorn... Barber...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3493 9445 3496 9437 3495 9434 3497 9424
3506 9423 3506 9425 3510 9414 3514 9414
3514 9403 3523 9403 3507 9375 3488 9374
3459 9399 3432 9435 3433 9447
TIME...MOT...LOC 0405Z 354DEG 42KT 3488 9418 3468 9436 3459 9460
HAIL...1.00IN
WIND...60MPH
$$
232770
WWUS54 KLZK 120418
SVSLZK
Severe Weather Statement
National Weather Service Little Rock AR
1118 PM CDT Sat Jul 11 2020
ARC083-120427-
/O.CAN.KLZK.SV.W.0310.000000T0000Z-200712T0445Z/
Logan AR-
1118 PM CDT Sat Jul 11 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LOGAN COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3493 9445 3496 9437 3495 9434 3497 9424
3494 9409 3451 9410 3432 9435 3433 9447
TIME...MOT...LOC 0417Z 334DEG 26KT 3484 9425 3464 9443 3455 9467
$$
ARC113-127-120445-
/O.CON.KLZK.SV.W.0310.000000T0000Z-200712T0445Z/
Polk AR-Scott AR-
1118 PM CDT Sat Jul 11 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR NORTHWESTERN POLK AND SOUTHWESTERN SCOTT COUNTIES...
At 1117 PM CDT, severe thunderstorms were located along a line
extending from near Beauchamp to Mountain Fork to near Octavia,
moving southeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Mena... Waldron...
Hatfield... Vandervoort...
Beauchamp... Mountain Fork...
Polk County Fairgrounds... Mena Intermountain Airport...
Mccauley... Oliver...
Morgan Springs... Queen Wilhelmina State Park...
Cove... Bates...
Acorn... Black Fork...
Winfield... Ink...
Hatton... Potter...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3493 9445 3496 9437 3495 9434 3497 9424
3494 9409 3451 9410 3432 9435 3433 9447
TIME...MOT...LOC 0417Z 334DEG 26KT 3484 9425 3464 9443 3455 9467
HAIL...<.75IN
WIND...60MPH
$$
CavanaughThe office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 11:43 PM CDT | Severe Thunderstorm Warning | LZK | Polk, Scott | 47 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2020Every severe thunderstorm warning in 2020
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.