Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

April 30, 2012LeFlore County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 30, 2012, 5:33 PM CDT for LeFlore County, Oklahoma. It was in force for 27 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, 5:33 PM CDT (22:33 UTC)
Expired: Apr 30, 2012, 6:00 PM CDT
In force: 27 min
Issued by: NWS Tulsa, OK

County LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 57 km from the middle of the area, began a volume at 22:35 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 nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 10.6 hours before the alert went out and 295 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1204 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 3 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Apr 30, 3:02 PM CDT, 2 hours 31 minutes earlier.

Area forecast discussion, Apr 30, 3:02 PM CDT, 2 hours 31 minutes before

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<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Apr 30, 5:16 PM CDT, 17 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
516 PM CDT MON APR 30 2012

ARZ001-002-010-011-019-020-029-OKZ049-053>076-011000-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
453 PM CDT MON APR 30 2012

...STRONG TO SEVERE THUNDERSTORM CHANCES AGAIN THROUGH TONIGHT...

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...THIS EVENING AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

FLASH FLOOD.
	RISK...ELEVATED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...AFTER 7 PM.

HEAVY RAIN.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

DISCUSSION...
SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE TO MOVE ACROSS
SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS IN RELATION TO A
REMNANT OUTFLOW BOUNDARY. WARM AND HUMID CONDITIONS AHEAD OF THIS
BOUNDARY HAS ALLOWED FOR FAVORABLE INSTABILITY SUPPORTIVE OF LARGE
HAIL BEING THE MAIN THREAT. THESE STORMS SHOULD DIMINISH DURING
THE EVENING HOURS WITH THE LOSS OF DAYTIME HEATING.

ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS EVENING AND
OVERNIGHT OVER WESTERN OKLAHOMA AND MOVE ACROSS NORTHEAST OKLAHOMA
AND NORTHWEST ARKANSAS. THIS THUNDERSTORM COMPLEX WILL HAVE THE
POTENTIAL FOR STRONG THE SEVERE THUNDERSTORMS WITH LARGE HAIL AND
DAMAGING WIND BEING THE MAIN THREATS. FLASH FLOODING WILL ALSO BE
A CONCERN AGAIN...WITH HEAVY RAINS POSSIBLY AFFECTING AREAS THAT
RECEIVED FLOODING RAINS LAST NIGHT. A FLASH FLOOD WATCH IS IN
EFFECT THROUGH TONIGHT FOR LOCATIONS NEAR THE OKLAHOMA KANSAS
BORDER.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
LOCAL SPOTTER ACTIVATION MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
WEDNESDAY...HIGH WIND POTENTIAL.
THURSDAY AND SUNDAY...NO HAZARDS.

EXTENDED DISCUSSION...
THE OVERALL POTENTIAL FOR THUNDERSTORMS WILL DECREASE
SIGNIFICANTLY BY TUESDAY AS A STATIONARY FRONT THAT HAS BEEN
OVER THE AREA FOR SEVERAL DAYS LIFTS TO THE NORTH. SOUTH WINDS
WILL BECOME STRONG TUESDAY AND WEDNESDAY WITH GUSTS OVER 30 MPH
LIKELY. VERY WARM AND HUMID WEATHER WILL PREVAIL THROUGH THE
WEEKEND.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Apr 30, 2:44 PM CDT, 2 hours 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
244 PM CDT MON APR 30 2012

OKZ053-302030-
CHOCTAW OK-
244 PM CDT MON APR 30 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 330 PM CDT
FOR THE FOLLOWING COUNTY...

IN SOUTHEAST OKLAHOMA
     WESTERN CHOCTAW

AT 245 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 10 MILES SOUTH OF
UNGER...MOVING NORTHEAST AT 20 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...GAY...UNGER AND SOPER.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL. THIS STORM
WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH. RESIDENTS IN THESE
AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT WEATHER ADVISORY IS
UPGRADED TO A WARNING.

LAT...LON 3387 9584 3393 9591 3410 9574 3394 9553
      3392 9556 3393 9559 3390 9563 3390 9567
      3388 9569 3389 9575 3386 9577
TIME...MOT...LOC 1945Z 227DEG 17KT 3388 9580

Special weather statement, Apr 30, 5:33 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
533 PM CDT MON APR 30 2012

OKZ075-076-302300-
LATIMER OK-LE FLORE OK-
533 PM CDT MON APR 30 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 600 PM CDT
FOR THE FOLLOWING COUNTIES...

IN SOUTHEAST OKLAHOMA
     WESTERN LE FLORE AND NORTHEASTERN LATIMER

AT 533 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 3 MILES SOUTHWEST
OF FANSHAWE...MOVING NORTHEAST AT 15 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...FANSHAWE.

THIS STORM WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL.

LAT...LON 3513 9489 3500 9468 3488 9494 3492 9501
TIME...MOT...LOC 2233Z 221DEG 15KT 3492 9494

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, 9:27 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	33 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

Nearby

Special Weather Statements in Oklahoma, 2012 Every special weather statement 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.