Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 39, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 2012, 9:30 PM CDT for Rogers County, Tulsa County, Washington County, Oklahoma. It was in force for 45 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 9, 2012, 9:30 PM CDT (02:30 UTC)
- Expired
- Apr 9, 2012, 10:15 PM CDT
- In force
- 45 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
Counties Rogers County, OK, Tulsa County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 33 km from the middle of the area, began a volume at 02:33 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 9, 9:37 PM CDT | HAIL 1.75 | 3 S Ramona, OK | QUARTER TO GOLF BALL SIZED HAIL COVERING THE GROUND. |
| Apr 9, 10:00 PM CDT | HAIL 0.75 | 3 Ne Collinsville, OK |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 2.5 hours before the alert went out and 157 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
- 944 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 945 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
447 WUUS54 KTSA 100230 SVRTSA OKC131-143-147-100315- /O.NEW.KTSA.SV.W.0039.120410T0230Z-120410T0315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 930 PM CDT MON APR 9 2012 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN ROGERS COUNTY IN NORTHEAST OKLAHOMA NORTHERN TULSA COUNTY IN NORTHEAST OKLAHOMA WASHINGTON COUNTY IN NORTHEAST OKLAHOMA * UNTIL 1015 PM CDT * AT 928 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR RAMONA... MOVING SOUTHEAST AT 30 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...VERA... COLLINSVILLE AND OOLOGAH. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS NEAR THE PATH OF THIS DANGEROUS STORM SHOULD PREPARE FOR LARGE DESTRUCTIVE HAIL. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS INJURY AND SIGNIFICANT DAMAGE TO PROPERTY. IF NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. && LAT...LON 3641 9546 3625 9592 3651 9600 3659 9583 TIME...MOT...LOC 0230Z 316DEG 25KT 3650 9589 $$
2 follow-up statements
325 WWUS54 KTSA 100258 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 958 PM CDT MON APR 9 2012 OKC131-143-147-100315- /O.CON.KTSA.SV.W.0039.000000T0000Z-120410T0315Z/ ROGERS OK-TULSA OK-WASHINGTON OK- 958 PM CDT MON APR 9 2012 ...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR SOUTHERN WASHINGTON...NORTHEASTERN TULSA AND NORTHERN ROGERS COUNTIES... AT 954 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR COLLINSVILLE...MOVING SOUTHEAST AT 30 MPH. STORM HAZARDS INCLUDE... HALF DOLLAR SIZE HAIL... SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...COLLINSVILLE AND RURAL SECTIONS OF WESTERN ROGERS COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM THAT IS LIKELY PRODUCING DAMAGING HAIL. IF NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. && LAT...LON 3642 9590 3652 9576 3641 9546 3625 9592 TIME...MOT...LOC 0258Z 316DEG 25KT 3640 9577 $$
308 WWUS54 KTSA 100309 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 1009 PM CDT MON APR 9 2012 OKC131-143-147-100319- /O.EXP.KTSA.SV.W.0039.000000T0000Z-120410T0315Z/ ROGERS OK-TULSA OK-WASHINGTON OK- 1009 PM CDT MON APR 9 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WASHINGTON... NORTHEASTERN TULSA AND NORTHERN ROGERS COUNTIES EXPIRES AT 1015 PM CDT... THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 3642 9590 3652 9576 3641 9546 3625 9592 TIME...MOT...LOC 0309Z 316DEG 25KT 3634 9570 $$
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 7:45 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 60 min |
| Apr 9, 8:22 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 53 min |
| Apr 9, 8:51 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 54 min |
| Apr 9, 9:03 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Nowata | 57 min |
| Apr 9, 9:04 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Rogers, Washington | 41 min |
| Apr 9, 9:41 PM CDT | Special Weather Statement | TSA | Osage | 49 min |
| Apr 9, 9:56 PM CDT | Special Weather Statement | TSA | Ottawa | 49 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2012Every severe thunderstorm warning in 2012
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.