Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 87, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 19, 2011, 5:40 PM CDT for Latimer County, Pushmataha County, Oklahoma. It was in force for 35 min. 2 reports 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 19, 2011, 5:40 PM CDT (22:40 UTC)
- Expired
- Apr 19, 2011, 6:15 PM CDT
- In force
- 35 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
Counties Latimer County, OK, Pushmataha County, OK
The radar
The Western Arkansas radar (KSRX), 123 km from the middle of the area, began a volume at 22:43 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 19, 5:57 PM CDT | HAIL 1.25 | Clayton, OK | |
| Apr 19, 6:15 PM CDT | HAIL 2.5 | 5 S Talihina, OK |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 19, 2:16 PM CDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 10.7 hours before the alert went out and 194 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
- 2660 J/kg
- Mixed-layer CIN
- -211 J/kg
- Mixed-layer LCL
- 1094 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 558 m²/s²
- 0-3 km storm-relative helicity
- 577 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 11.5
The text
As transmitted, in the capitals the NWS used until 2016.
614
WUUS54 KTSA 192240
SVRTSA
OKC077-127-192315-
/O.NEW.KTSA.SV.W.0087.110419T2240Z-110419T2315Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
540 PM CDT TUE APR 19 2011
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN LATIMER COUNTY IN SOUTHEAST OKLAHOMA
NORTHEASTERN PUSHMATAHA COUNTY IN SOUTHEAST OKLAHOMA
* UNTIL 615 PM CDT
* AT 539 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES EAST OF
STANLEY...MOVING NORTHEAST AT 40 MPH.
STORM HAZARDS INCLUDE...
DAMAGING GOLF BALL SIZE HAIL...
WIND GUSTS TO 60 MPH...
* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
CLAYTON...TUSKAHOMA...KIAMICHI AND ALBION.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH
OF THIS STORM...BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM
WINDOWS.
&&
LAT...LON 3458 9557 3460 9554 3459 9552 3461 9552
3479 9511 3460 9500 3444 9550
TIME...MOT...LOC 2240Z 243DEG 35KT 3455 9541
$$2 follow-up statements
501 WWUS54 KTSA 192257 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 557 PM CDT TUE APR 19 2011 OKC077-127-192315- /O.CON.KTSA.SV.W.0087.000000T0000Z-110419T2315Z/ PUSHMATAHA OK-LATIMER OK- 557 PM CDT TUE APR 19 2011 ...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR SOUTHERN LATIMER AND NORTHEASTERN PUSHMATAHA COUNTIES... AT 553 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR TUSKAHOMA... MOVING NORTHEAST AT 40 MPH. STORM HAZARDS INCLUDE... DESTRUCTIVE BASEBALL SIZE HAIL... WIND GUSTS TO 60 MPH... SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...KIAMICHI AND ALBION. PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. IF YOU ARE NEAR THE PATH OF THIS STORM...YOU SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND BE READY TO ACT QUICKLY. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY. && LAT...LON 3464 9546 3479 9511 3460 9500 3449 9535 TIME...MOT...LOC 2257Z 243DEG 35KT 3462 9523 $$
299 WWUS54 KTSA 192314 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 614 PM CDT TUE APR 19 2011 OKC077-127-192323- /O.EXP.KTSA.SV.W.0087.000000T0000Z-110419T2315Z/ PUSHMATAHA OK-LATIMER OK- 614 PM CDT TUE APR 19 2011 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LATIMER AND NORTHEASTERN PUSHMATAHA COUNTIES EXPIRES AT 615 PM CDT... THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE. A TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM. LAT...LON 3464 9546 3479 9511 3460 9500 3449 9535 TIME...MOT...LOC 2313Z 245DEG 34KT 3467 9507 $$
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 3:46 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg, Pushmataha | 59 min |
| Apr 19, 3:58 PM CDT | Tornado Warning | TSA | Pushmataha | 62 min |
| Apr 19, 4:12 PM CDT | Special Weather Statement | TSA | Sequoyah | 33 min |
| Apr 19, 4:55 PM CDT | Tornado Warning | TSA | Pushmataha | 65 min |
| Apr 19, 5:01 PM CDT | Special Weather Statement | TSA | Choctaw | 59 min |
| Apr 19, 5:51 PM CDT | Tornado Warning | TSA | LeFlore, Pushmataha | 54 min |
| Apr 19, 6:07 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, LeFlore, Pushmataha | 53 min |
| Apr 19, 6:44 PM CDT | Tornado Warning | TSA | LeFlore | 31 min |
Nearby
Severe 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.