Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 60, NWS Tulsa, OK

April 29, 2012Osage County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 29, 2012, 9:27 PM CDT for Osage County, Washington County, Oklahoma. It was in force for 33 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 29, 2012, 9:27 PM CDT (02:27 UTC)
Expired: Apr 29, 2012, 10:00 PM CDT
In force: 33 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Osage County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 75 km from the middle of the area, began a volume at 02:28 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 29, 8:04 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 2.5 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.

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: 2178 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 761 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 4.4

Open this sounding in Storm Lab

The text

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

999 
WUUS54 KTSA 300227
SVRTSA
OKC113-147-300300-
/O.NEW.KTSA.SV.W.0060.120430T0227Z-120430T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
927 PM CDT SUN APR 29 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1000 PM CDT

* AT 924 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES SOUTHWEST
  OF OSAGE HILLS STATE PARK...MOVING EAST AT 35 MPH.

  STORM HAZARDS INCLUDE...
  HALF DOLLAR SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...OSAGE
  HILLS STATE PARK...OKESA...BARTLESVILLE AND DEWEY.

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 3689 9582 3664 9581 3657 9621 3678 9633
TIME...MOT...LOC 0227Z 254DEG 32KT 3669 9622

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 7:41 PM CDT	Special Weather Statement	TSA	Osage	34 min
Apr 29, 7:52 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	38 min
Apr 29, 8:16 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	44 min
Apr 29, 8:47 PM CDT	River Flood Warning	TSA	Ottawa	5 days
Apr 29, 8:49 PM CDT	Tornado Warning	TSA	Osage	26 min
Apr 29, 9:13 PM CDT	Tornado Warning	TSA	Osage	29 min
Apr 29, 9:48 PM CDT	Areal Flood Advisory	TSA	Nowata, Osage, Pawnee, Washington	3 hr
Apr 29, 9:58 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	47 min
Apr 29, 10:13 PM CDT	Tornado Warning	TSA	Osage, Washington	32 min
Apr 29, 10:35 PM CDT	Severe Thunderstorm Warning	TSA	Nowata	20 min
Apr 29, 10:55 PM CDT	Flash Flood Warning	TSA	Osage	4 hr
Apr 29, 11:16 PM CDT	Severe Thunderstorm Warning	TSA	Osage	25 min
Apr 29, 11:44 PM CDT	Special Weather Statement	TSA	Washington	31 min
Apr 30, 12:08 AM CDT	Special Weather Statement	TSA	Craig, Nowata	37 min
Apr 30, 12:18 AM CDT	Special Weather Statement	TSA	Osage	42 min
Apr 30, 12:41 AM CDT	Special Weather Statement	TSA	Ottawa	64 min
Apr 30, 12:47 AM CDT	Special Weather Statement	TSA	Washington	43 min
Apr 30, 1:02 AM CDT	Areal Flood Advisory	TSA	Craig, Nowata, Osage, Ottawa, Pawnee, Rogers and 1 more	3 hr
Apr 30, 2:19 AM CDT	Special Weather Statement	TSA	Osage	41 min
Apr 30, 2:55 AM CDT	Flash Flood Warning	TSA	Osage, Washington	3 hr
Apr 30, 4:06 AM CDT	Areal Flood Advisory	TSA	Craig, Creek, Delaware, Mayes, Nowata, Osage and 6 more	3 hr
Apr 30, 8:26 AM CDT	River Flood Warning	TSA	Nowata	70 hr
Apr 30, 9:15 AM CDT	River Flood Warning	TSA	Washington	23 hr
Apr 30, 9:15 AM CDT	River Flood Warning	TSA	Rogers, Tulsa	41 hr
Apr 30, 11:18 AM CDT	Areal Flood Warning	TSA	Osage, Washington	29 hr
Apr 30, 2:04 PM CDT	Flash Flood Watch	TSA	Craig, Nowata, Ottawa, Pawnee, Washington	17 hr
Apr 30, 2:44 PM CDT	Special Weather Statement	TSA	Choctaw	46 min
Apr 30, 5:33 PM CDT	Special Weather Statement	TSA	LeFlore	27 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2012 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.