Alert archive / Oklahoma / Tornado Warnings in 2012

Tornado Warning 20, NWS Tulsa, OK

April 30, 2012Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 30, 2012, 11:03 PM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 42 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: Apr 30, 2012, 11:03 PM CDT (04:03 UTC)
Expired: Apr 30, 2012, 11:45 PM CDT
In force: 42 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Osage County, OK, Pawnee County, OK

The radar

The Vance AFB radar (KVNX), 105 km from the middle of the area, began a volume at 04:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 30, 7:30 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 4.1 hours before the alert went out and 47 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2077 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1205 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 246 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 16.5

Open this sounding in Storm Lab

The text

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

035 
WFUS54 KTSA 010403
TORTSA
OKC113-117-010445-
/O.NEW.KTSA.TO.W.0020.120501T0403Z-120501T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
1103 PM CDT MON APR 30 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
  PAWNEE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1145 PM CDT

* AT 1100 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED OVER SOUTHERN KAY COUNTY...MOVING EAST AT 35
  MPH.

* THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
  INDICATED COUNTIES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

&&

LAT...LON 3670 9706 3669 9695 3672 9693 3666 9668
      3638 9684 3649 9704 3654 9699 3656 9691
      3658 9690 3659 9692 3658 9700 3659 9705
      3668 9707
TIME...MOT...LOC 0403Z 292DEG 32KT 3665 9710

$$

2 follow-up statements

699 
WWUS54 KTSA 010420
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1120 PM CDT MON APR 30 2012

OKC113-117-010445-
/O.CON.KTSA.TO.W.0020.000000T0000Z-120501T0445Z/
OSAGE OK-PAWNEE OK-
1120 PM CDT MON APR 30 2012

...TORNADO WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR PAWNEE AND
WESTERN OSAGE COUNTIES...

AT 1115 PM CDT...POTENTIAL TORNADIC CIRCULATIONS WERE LOCATED 
ALONG A LINE EXTENDING FROM WESTERN OSAGE COUNTY TO WESTERN PAWNEE 
COUNTY...MOVING EAST AT 35 MPH. TORNADOES MAY FORM RAPIDLY ANYWHERE 
ALONG THIS LINE!

THIS STORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NIGHTTIME TORNADOES ARE ESPECIALLY DANGEROUS...TAKE COVER NOW! IF YOU
WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A
SAFE PLACE!

&&

LAT...LON 3670 9706 3669 9695 3672 9693 3666 9668
      3638 9684 3649 9704 3654 9699 3656 9691
      3658 9690 3659 9692 3658 9700 3659 9705
      3668 9707
TIME...MOT...LOC 0419Z 292DEG 32KT 3666 9687 3656 9683
          3643 9690

$$

648 
WWUS54 KTSA 010439
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1139 PM CDT MON APR 30 2012

OKC113-117-010445-
/O.CON.KTSA.TO.W.0020.000000T0000Z-120501T0445Z/
OSAGE OK-PAWNEE OK-
1139 PM CDT MON APR 30 2012

...TORNADO WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR PAWNEE AND
WESTERN OSAGE COUNTIES...

AT 1138 PM CDT...A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
TORNADOES WAS LOCATED ALONG A LINE EXTENDING FROM WESTERN OSAGE
COUNTY TO CENTRAL OSAGE COUNTY TO PAWNEE COUNTY...MOVING EAST AT 35
MPH. TORNADOES MAY FORM RAPIDLY ANYWHERE IN THE LINE OF STORMS!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

NIGHTTIME TORNADOES ARE ESPECIALLY DANGEROUS...TAKE COVER NOW! IF YOU
WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A
SAFE PLACE!

&&

LAT...LON 3646 9694 3665 9678 3666 9668 3638 9684
TIME...MOT...LOC 0439Z 290DEG 31KT 3663 9668 3653 9664
          3643 9677

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:03 PM CDT	Special Weather Statement	TSA	Nowata	27 min
Apr 30, 7:08 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	52 min
Apr 30, 7:18 PM CDT	Special Weather Statement	TSA	Muskogee	42 min
Apr 30, 7:54 PM CDT	Severe Thunderstorm Warning	TSA	Nowata	66 min
Apr 30, 8:02 PM CDT	Tornado Warning	TSA	Nowata	43 min
Apr 30, 8:21 PM CDT	Tornado Warning	TSA	Nowata	39 min
Apr 30, 8:37 PM CDT	Tornado Warning	TSA	Nowata	23 min
Apr 30, 8:53 PM CDT	Tornado Warning	TSA	Craig, Nowata	37 min
Apr 30, 8:58 PM CDT	Flash Flood Warning	TSA	Craig, Nowata	3 hr
Apr 30, 9:01 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	44 min
Apr 30, 9:08 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	67 min
Apr 30, 9:29 PM CDT	Severe Thunderstorm Warning	TSA	Craig	15 min
Apr 30, 9:43 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	62 min
Apr 30, 9:58 PM CDT	Tornado Warning	TSA	Craig	32 min
Apr 30, 10:28 PM CDT	Severe Thunderstorm Warning	TSA	Craig	62 min
Apr 30, 10:34 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	71 min
Apr 30, 11:00 PM CDT	Severe Thunderstorm Warning	TSA	Craig	60 min
Apr 30, 11:11 PM CDT	Flash Flood Warning	TSA	Osage, Pawnee	4 hr
Apr 30, 11:23 PM CDT	Tornado Warning	TSA	Osage, Pawnee	37 min
Apr 30, 11:42 PM CDT	Special Weather Statement	TSA	Creek	48 min
Apr 30, 11:42 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	63 min
Apr 30, 11:51 PM CDT	Flash Flood Warning	TSA	Craig, Nowata	3 hr
Apr 30, 11:58 PM CDT	Severe Thunderstorm Warning	TSA	Craig	32 min
May 1, 12:19 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Tulsa, Washington	56 min
May 1, 12:26 AM CDT	Special Weather Statement	TSA	Tulsa	49 min
May 1, 12:47 AM CDT	Tornado Warning	TSA	Nowata	9 min
May 1, 12:49 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Washington	56 min
May 1, 12:56 AM CDT	Special Weather Statement	TSA	Okfuskee	49 min
May 1, 12:59 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Nowata, Ottawa, Rogers	76 min
May 1, 1:17 AM CDT	Severe Thunderstorm Warning	TSA	Mayes, Muskogee, Okmulgee, Rogers, Tulsa, Wagoner	58 min
May 1, 1:38 AM CDT	Special Weather Statement	TSA	Okfuskee, Okmulgee	37 min
May 1, 1:52 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Delaware, Mayes	53 min
May 1, 1:53 AM CDT	Flash Flood Warning	TSA	Craig, Nowata, Ottawa, Rogers	5 hr
May 1, 2:10 AM CDT	Special Weather Statement	TSA	Cherokee, McIntosh, Muskogee	50 min
May 1, 2:21 AM CDT	Special Weather Statement	TSA	Pittsburg	39 min
May 1, 2:30 AM CDT	Special Weather Statement	TSA	Creek, Tulsa, Wagoner	45 min
May 1, 2:33 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	27 min
May 1, 2:56 AM CDT	Special Weather Statement	TSA	Adair	49 min
May 1, 3:02 AM CDT	Special Weather Statement	TSA	Haskell, Sequoyah	43 min
May 1, 3:28 AM CDT	Severe Thunderstorm Warning	TSA	Adair	47 min
May 1, 3:30 AM CDT	Special Weather Statement	TSA	Latimer, LeFlore	45 min
May 1, 6:35 AM CDT	Areal Flood Warning	TSA	Craig, Nowata, Ottawa	10 hr
May 1, 8:33 AM CDT	River Flood Warning	TSA	Ottawa	25 hr
May 1, 4:28 PM CDT	Areal Flood Warning	TSA	Craig, Nowata, Osage, Ottawa, Washington	24 hr

Nearby

Tornado Warnings in Oklahoma, 2012 Every tornado warning in 2012 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.