Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 79, NWS Tulsa, OK

May 1, 2012Cherokee County, Delaware County, Mayes County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 1, 2012, 1:52 AM CDT for Cherokee County, Delaware County, Mayes County, Oklahoma. It was in force for 53 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: May 1, 2012, 1:52 AM CDT (06:52 UTC)
Expired: May 1, 2012, 2:45 AM CDT
In force: 53 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Cherokee County, OK, Delaware County, OK, Mayes County, OK

The radar

The Tulsa radar (KINX), 56 km from the middle of the area, began a volume at 06:53 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
May 1, 1:43 AM CDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.9 hours before the alert went out and 125 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: 202 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 1176 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

042 
WUUS54 KTSA 010652
SVRTSA
OKC021-041-097-010745-
/O.NEW.KTSA.SV.W.0079.120501T0652Z-120501T0745Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
152 AM CDT TUE MAY 1 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  SOUTHERN DELAWARE COUNTY IN NORTHEAST OKLAHOMA
  SOUTHEASTERN MAYES COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 245 AM CDT

* AT 148 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 4 MILES WEST OF SPAVINAW STATE PARK TO 3 MILES NORTH
  OF LOCUST GROVE TO 19 MILES SOUTHWEST OF LOCUST GROVE...MOVING EAST
  AT 40 MPH.

  STORM HAZARDS INCLUDE...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  SPAVINAW STATE PARK...SPAVINAW...LOCUST GROVE...CHLOETA...ROSE...
  JAY...LEACH...TWIN OAKS...OAKS...KANSAS...COLCORD AND WEST SILOAM
  SPRINGS.

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 3651 9462 3616 9456 3616 9480 3613 9480
      3607 9533 3608 9543 3622 9525 3640 9512
TIME...MOT...LOC 0652Z 257DEG 35KT 3639 9509 3625 9512
          3607 9542

$$

2 follow-up statements

083 
WWUS54 KTSA 010702
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
202 AM CDT TUE MAY 1 2012

OKC021-041-097-010745-
/O.CON.KTSA.SV.W.0079.000000T0000Z-120501T0745Z/
CHEROKEE OK-DELAWARE OK-MAYES OK-
202 AM CDT TUE MAY 1 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM CDT FOR
SOUTHEASTERN MAYES...SOUTHERN DELAWARE AND NORTHEASTERN CHEROKEE
COUNTIES...

AT 157 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM SPAVINAW TO ROSE TO MAZIE...MOVING EAST AT 40 MPH.

STORM HAZARDS INCLUDE...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ROSE...
JAY...LAKE EUCHA STATE PARK...LEACH...TWIN OAKS...OAKS...KANSAS...
COLCORD...NATURAL FALLS STATE PARK AND WEST SILOAM SPRINGS.

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 3651 9462 3616 9456 3616 9480 3613 9480
      3607 9533 3608 9543 3622 9525 3640 9512
TIME...MOT...LOC 0702Z 257DEG 35KT 3641 9497 3627 9500
          3609 9530

$$

675 
WWUS54 KTSA 010734
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
234 AM CDT TUE MAY 1 2012

OKC021-041-097-010745-
/O.CON.KTSA.SV.W.0079.000000T0000Z-120501T0745Z/
CHEROKEE OK-DELAWARE OK-MAYES OK-
234 AM CDT TUE MAY 1 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM CDT FOR
SOUTHEASTERN MAYES...SOUTHERN DELAWARE AND NORTHEASTERN CHEROKEE
COUNTIES...

AT 230 AM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 9 MILES EAST OF JAY TO COLCORD TO LEACH...MOVING EAST
AT 40 MPH.

STORM HAZARDS INCLUDE...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...OAKS...
KANSAS...COLCORD...NATURAL FALLS STATE PARK AND WEST SILOAM SPRINGS.

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 3616 9457 3616 9480 3613 9480 3609 9517
      3621 9514 3641 9494 3651 9462
TIME...MOT...LOC 0734Z 257DEG 35KT 3648 9459 3634 9462
          3616 9492

$$

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, 11:03 PM CDT	Tornado Warning	TSA	Osage, Pawnee	42 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, 1:53 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

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.