Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 95, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 21, 2011, 1:06 PM CDT for Washington County, Arkansas; Adair County, Oklahoma. It was in force for 39 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 21, 2011, 1:06 PM CDT (18:06 UTC)
- Expired
- Apr 21, 2011, 1:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
Counties Washington County, AR, Adair County, OK
The radar
The Western Arkansas radar (KSRX), 74 km from the middle of the area, began a volume at 18:09 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 21, 1:27 PM CDT | HAIL 1.75 | Lincoln, AR |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 6.1 hours before the alert went out and 118 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
- 1583 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 289 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
605 WUUS54 KTSA 211806 SVRTSA ARC143-OKC001-211845- /O.NEW.KTSA.SV.W.0095.110421T1806Z-110421T1845Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 106 PM CDT THU APR 21 2011 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN ADAIR COUNTY IN NORTHEAST OKLAHOMA WESTERN WASHINGTON COUNTY IN NORTHWEST ARKANSAS * UNTIL 145 PM CDT * AT 104 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 15 MILES SOUTHWEST OF LINCOLN...MOVING NORTHEAST AT 30 MPH. STORM HAZARDS INCLUDE... QUARTER SIZE HAIL... * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... STRICKLER...LINCOLN AND PRAIRIE GROVE. PRECAUTIONARY/PREPAREDNESS ACTIONS... PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. && LAT...LON 3613 9434 3588 9416 3575 9458 3589 9465 TIME...MOT...LOC 1806Z 232DEG 25KT 3581 9460 $$
3 follow-up statements
636
WWUS54 KTSA 211819
SVSTSA
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
119 PM CDT THU APR 21 2011
OKC001-211829-
/O.CAN.KTSA.SV.W.0095.000000T0000Z-110421T1845Z/
ADAIR OK-
119 PM CDT THU APR 21 2011
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ADAIR COUNTY IS
CANCELLED...
LAT...LON 3588 9416 3582 9450 3593 9452 3596 9452
3613 9434
TIME...MOT...LOC 1819Z 232DEG 25KT 3590 9449
$$
ARC143-211845-
/O.CON.KTSA.SV.W.0095.000000T0000Z-110421T1845Z/
WASHINGTON AR-
119 PM CDT THU APR 21 2011
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT FOR
WESTERN WASHINGTON COUNTY...
AT 117 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR MORROW...
MOVING NORTHEAST AT 30 MPH.
STORM HAZARDS INCLUDE...
HALF DOLLAR SIZE HAIL...
SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...CLYDE...
SUMMERS...CANEHILL...LINCOLN...RHEA...HOGEYE...PRAIRIE GROVE...VINEY
GROVE...SAVOY AND WALNUT GROVE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM THAT IS LIKELY PRODUCING DAMAGING HAIL. IF
NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN
AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3588 9416 3582 9450 3593 9452 3596 9452
3613 9434
TIME...MOT...LOC 1819Z 232DEG 25KT 3590 9449
$$768
WWUS54 KTSA 211823
SVSTSA
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
123 PM CDT THU APR 21 2011
ARC143-211845-
/O.CON.KTSA.SV.W.0095.000000T0000Z-110421T1845Z/
WASHINGTON AR-
123 PM CDT THU APR 21 2011
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT FOR
WESTERN WASHINGTON COUNTY...
AT 121 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR CLYDE...MOVING
NORTHEAST AT 30 MPH.
STORM HAZARDS INCLUDE...
DAMAGING GOLF BALL SIZE HAIL...
SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...CLYDE...
CANEHILL...LINCOLN...RHEA...HOGEYE...PRAIRIE GROVE...VINEY GROVE...
SAVOY...WOOLSEY AND WALNUT GROVE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM THAT IS LIKELY PRODUCING DAMAGING HAIL. IF
NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN
AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 3585 9449 3594 9451 3597 9450 3613 9434
3588 9416
TIME...MOT...LOC 1823Z 232DEG 25KT 3592 9446
$$854 WWUS54 KTSA 211837 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 137 PM CDT THU APR 21 2011 ARC143-211845- /O.CON.KTSA.SV.W.0095.000000T0000Z-110421T1845Z/ WASHINGTON AR- 137 PM CDT THU APR 21 2011 ...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CDT FOR CENTRAL WASHINGTON COUNTY... AT 134 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PRAIRIE GROVE...MOVING NORTHEAST AT 30 MPH. STORM HAZARDS INCLUDE... DAMAGING GOLF BALL SIZE HAIL... SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...PRAIRIE GROVE...VINEY GROVE...SAVOY AND WALNUT GROVE. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM THAT IS LIKELY PRODUCING DAMAGING HAIL. IF NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. && LAT...LON 3592 9419 3593 9437 3599 9441 3613 9434 TIME...MOT...LOC 1837Z 232DEG 25KT 3599 9435 $$
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 11:34 AM CDT | Special Weather Statement | TSA | Polk | 26 min |
| Apr 21, 1:40 PM CDT | Severe Thunderstorm Warning | TSA | Benton, Washington | 50 min |
| Apr 21, 1:54 PM CDT | Severe Thunderstorm Warning | TSA | Benton, Washington | 51 min |
| Apr 21, 2:18 PM CDT | Severe Thunderstorm Warning | TSA | Benton, Carroll, Madison, Washington | 57 min |
| Apr 21, 2:24 PM CDT | Severe Thunderstorm Warning | TSA | Benton | 29 min |
| Apr 21, 2:56 PM CDT | Severe Thunderstorm Warning | TSA | Crawford, Washington | 34 min |
| Apr 21, 3:26 PM CDT | Severe Thunderstorm Warning | TSA | Benton, Madison, Washington | 24 min |
| Apr 21, 3:46 PM CDT | Special Weather Statement | TSA | Benton | 29 min |
| Apr 21, 5:21 PM CDT | Severe Thunderstorm Warning | TSA | Sebastian | 39 min |
| Apr 21, 6:02 PM CDT | Special Weather Statement | TSA | Sebastian | 28 min |
| Apr 21, 12:16 AM CDT | Special Weather Statement | TSA | Pushmataha | 29 min |
| Apr 21, 12:17 AM CDT | Special Weather Statement | TSA | Latimer | 28 min |
| Apr 21, 12:25 AM CDT | Special Weather Statement | TSA | Pushmataha | 35 min |
| Apr 21, 12:50 AM CDT | Special Weather Statement | TSA | Pushmataha | 25 min |
| Apr 21, 12:55 AM CDT | Special Weather Statement | TSA | LeFlore | 35 min |
| Apr 21, 12:23 PM CDT | Special Weather Statement | TSA | Sequoyah | 37 min |
| Apr 21, 12:28 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Sequoyah | 47 min |
| Apr 21, 12:47 PM CDT | Special Weather Statement | TSA | Cherokee | 43 min |
| Apr 21, 1:14 PM CDT | Special Weather Statement | TSA | Pushmataha | 46 min |
| Apr 21, 1:24 PM CDT | Special Weather Statement | TSA | Latimer | 51 min |
| Apr 21, 1:48 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 42 min |
| Apr 21, 2:11 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 19 min |
| Apr 21, 2:23 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Nowata, Rogers | 52 min |
| Apr 21, 2:30 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 45 min |
| Apr 21, 2:55 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Rogers | 23 min |
| Apr 21, 3:08 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, LeFlore, Pushmataha | 52 min |
| Apr 21, 3:17 PM CDT | Severe Thunderstorm Warning | TSA | Delaware, Ottawa | 25 min |
| Apr 21, 3:56 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 49 min |
| Apr 21, 5:12 PM CDT | Special Weather Statement | TSA | LeFlore | 33 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2011Severe Thunderstorm Warnings in Oklahoma, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.