Alert archive / Oklahoma / Tornado Warnings in 2012

Tornado Warning 9, NWS Tulsa, OK

April 15, 20125 counties in Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 15, 2012, 5:51 AM CDT for 5 counties in Oklahoma. It was in force for 24 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 15, 2012, 5:51 AM CDT (10:51 UTC)
Expired
Apr 15, 2012, 6:15 AM CDT
In force
24 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Nowata County, OK, Osage County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 52 km from the middle of the area, began a volume at 10:52 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

TimeReportWhereRemark
Apr 15, 5:55 AM CDTTSTM WND DMG1 Ssw Skiatook, OKUNKNOWN DAMAGE AT THE AIRPORT. PROBABLE TORNADO. RELAYED BY KOTV. TIME ESTIMATED VIA RADAR.

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.

IssuedProductOfficeLasted
Apr 15, 1:37 AM CDTTornado WatchSPC5 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 10.9 hours before the alert went out and 146 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.

Skew-T log-pSkew-T log-p diagram, Lamont, OK at 00:00Z on 2012-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2195 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lamont, OK at 00:00Z on 2012-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 335 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2195 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
863 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
335 m²/s²
0-3 km storm-relative helicity
436 m²/s²
Significant tornado parameter
5.9
Supercell composite
19.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

614 
WFUS54 KTSA 151051
TORTSA
OKC105-113-131-143-147-151115-
/O.NEW.KTSA.TO.W.0009.120415T1051Z-120415T1115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
551 AM CDT SUN APR 15 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN NOWATA COUNTY IN NORTHEAST OKLAHOMA
  SOUTHEASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
  NORTHWESTERN ROGERS COUNTY IN NORTHEAST OKLAHOMA
  NORTHERN TULSA COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 615 AM CDT

* AT 550 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 4 MILES SOUTHWEST OF SKIATOOK...MOVING
  NORTHEAST AT 60 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  SKIATOOK...VERA...RAMONA...TALALA...WATOVA...DELAWARE AND NOWATA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

&&

LAT...LON 3684 9573 3669 9551 3621 9604 3632 9621
TIME...MOT...LOC 1051Z 219DEG 53KT 3634 9605

$$
1 follow-up statement
953 
WWUS54 KTSA 151059
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
559 AM CDT SUN APR 15 2012

OKC105-151109-
/O.CAN.KTSA.TO.W.0009.000000T0000Z-120415T1115Z/
NOWATA OK-
559 AM CDT SUN APR 15 2012

...THE TORNADO WARNING FOR SOUTHERN NOWATA COUNTY IS CANCELLED...

LAT...LON 3629 9596 3642 9606 3661 9582 3651 9571
      3630 9595
TIME...MOT...LOC 1059Z 230DEG 33KT 3638 9598

$$

OKC113-131-143-147-151115-
/O.CON.KTSA.TO.W.0009.000000T0000Z-120415T1115Z/
OSAGE OK-ROGERS OK-TULSA OK-WASHINGTON OK-
559 AM CDT SUN APR 15 2012

...TORNADO WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR
WASHINGTON...NORTHERN TULSA...NORTHWESTERN ROGERS AND SOUTHEASTERN
OSAGE COUNTIES...

AT 558 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED NEAR SKIATOOK...
MOVING NORTHEAST AT 40 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...VERA AND
RAMONA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

&&

LAT...LON 3629 9596 3642 9606 3661 9582 3651 9571
      3630 9595
TIME...MOT...LOC 1059Z 230DEG 33KT 3638 9598

$$

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 15, 12:40 AM CDTWind AdvisoryTSACreek, Okfuskee, Okmulgee, Pawnee, Tulsa, Washington3 hr
Apr 15, 3:41 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee64 min
Apr 15, 4:43 AM CDTSevere Thunderstorm WarningTSACreek, Osage, Pawnee62 min
Apr 15, 5:05 AM CDTSpecial Weather StatementTSACreek55 min
Apr 15, 5:30 AM CDTSevere Thunderstorm WarningTSACreek, Nowata, Osage, Pawnee, Rogers, Tulsa and 1 more60 min
Apr 15, 5:47 AM CDTSpecial Weather StatementTSAOkfuskee, Okmulgee, Rogers, Tulsa58 min
Apr 15, 6:22 AM CDTSevere Thunderstorm WarningTSACraig, Mayes, Nowata, Ottawa, Rogers53 min
Apr 15, 6:41 AM CDTSpecial Weather StatementTSAMayes, Okmulgee, Wagoner64 min
Apr 15, 6:43 AM CDTSpecial Weather StatementTSAMcIntosh, Pittsburg62 min
Apr 15, 7:41 AM CDTSpecial Weather StatementTSADelaware34 min
Apr 15, 7:44 AM CDTSpecial Weather StatementTSAMcIntosh, Muskogee, Pittsburg, Wagoner31 min
Apr 15, 8:13 AM CDTSpecial Weather StatementTSACherokee, Delaware, Muskogee62 min
Apr 15, 8:14 AM CDTSpecial Weather StatementTSAHaskell, Latimer, Pittsburg, Pushmataha, Sequoyah61 min
Apr 15, 9:13 AM CDTSevere Thunderstorm WarningTSAAdair, Cherokee, Muskogee62 min
Apr 15, 9:16 AM CDTTornado WarningTSAAdair, Cherokee29 min
Apr 15, 9:42 AM CDTTornado WarningTSAAdair33 min
Apr 15, 11:28 AM CDTSpecial Weather StatementTSALeFlore62 min
Apr 15, 12:42 PM CDTRiver Flood WarningTSARogers, Tulsa7 hr

Nearby

Tornado Warnings in Oklahoma, 2012Every tornado warning in 2012Tornadoes 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.