Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 522, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 20, 2011, 6:11 PM CDT for Franklin County, Arkansas. It was in force for 49 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
- Aug 20, 2011, 6:11 PM CDT (23:11 UTC)
- Expired
- Aug 20, 2011, 7:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
County Franklin County, AR
The radar
The Western Arkansas radar (KSRX), 68 km from the middle of the area, began a volume at 23:13 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, 11.2 hours before the alert went out and 133 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
- 3504 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 518 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 14.7
The text
As transmitted, in the capitals the NWS used until 2016.
100 WUUS54 KTSA 202311 SVRTSA ARC047-210000- /O.NEW.KTSA.SV.W.0522.110820T2311Z-110821T0000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 611 PM CDT SAT AUG 20 2011 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS * UNTIL 700 PM CDT * AT 608 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES WEST OF CASS...MOVING NORTHEAST AT 25 MPH. STORM HAZARDS INCLUDE... QUARTER SIZE HAIL... WIND GUSTS TO 60 MPH... * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...CASS. 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 3577 9370 3567 9370 3563 9397 3570 9397 TIME...MOT...LOC 2311Z 247DEG 21KT 3567 9393 $$
3 follow-up statements
569 WWUS54 KTSA 202319 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 619 PM CDT SAT AUG 20 2011 ARC047-210000- /O.CON.KTSA.SV.W.0522.000000T0000Z-110821T0000Z/ FRANKLIN AR- 619 PM CDT SAT AUG 20 2011 ...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR NORTHEASTERN FRANKLIN COUNTY... AT 617 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR TURNERS BEND...MOVING EAST AT 15 MPH. STORM HAZARDS INCLUDE... HALF DOLLAR SIZE HAIL... WIND GUSTS TO 60 MPH... SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...TURNERS BEND...CASS AND REDDING. PRECAUTIONARY/PREPAREDNESS ACTIONS... PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. && LAT...LON 3570 9396 3577 9370 3567 9370 3563 9396 TIME...MOT...LOC 2319Z 263DEG 9KT 3567 9391 $$
482 WWUS54 KTSA 202346 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 646 PM CDT SAT AUG 20 2011 ARC047-210000- /O.CON.KTSA.SV.W.0522.000000T0000Z-110821T0000Z/ FRANKLIN AR- 646 PM CDT SAT AUG 20 2011 ...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR NORTHEASTERN FRANKLIN COUNTY... AT 646 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR REDDING... MOVING EAST AT 30 MPH. STORM HAZARDS INCLUDE... QUARTER SIZE HAIL... WIND GUSTS TO 60 MPH... . 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 3573 9378 3575 9370 3567 9370 3566 9379 TIME...MOT...LOC 2347Z 254DEG 24KT 3570 9370 $$
923 WWUS54 KTSA 202355 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 655 PM CDT SAT AUG 20 2011 ARC047-210005- /O.EXP.KTSA.SV.W.0522.000000T0000Z-110821T0000Z/ FRANKLIN AR- 655 PM CDT SAT AUG 20 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FRANKLIN COUNTY EXPIRES AT 700 PM CDT... THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA AND WEAKENED BELOW SEVERE LIMITS...THEREFORE THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3573 9378 3575 9370 3567 9370 3566 9379 TIME...MOT...LOC 2355Z 254DEG 24KT 3571 9364 $$
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 3:36 PM CDT | Heat Advisory | TSA | 28 hr | |
| Aug 20, 5:29 PM CDT | Special Weather Statement | TSA | Sebastian | 31 min |
| Aug 20, 5:46 PM CDT | Special Weather Statement | TSA | Franklin | 29 min |
| Aug 20, 5:58 PM CDT | Severe Thunderstorm Warning | TSA | Franklin | 47 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.