Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

April 30, 2012Creek County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 30, 2012, 11:42 PM CDT for Creek County, Oklahoma. It was in force for 48 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, 11:42 PM CDT (04:42 UTC)
Expired: May 1, 2012, 12:30 AM CDT
In force: 48 min
Issued by: NWS Tulsa, OK

County Creek County, OK

The radar

The Norman radar (KTLX), 87 km from the middle of the area, began a volume at 04:45 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

Norman, OK (KOUN), launched 00:00Z, 4.7 hours before the alert went out and 103 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: -5 J/kg
Mixed-layer LCL: 1251 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 10.1

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, 11:40 PM CDT, 2 minutes earlier.

Area forecast discussion, Apr 30, 11:40 PM CDT, 2 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1140 PM CDT MON APR 30 2012

.DISCUSSION...

THE 06Z AVIATION DISCUSSION CAN BE FOUND BELOW.

&&

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
VFR CONDITIONS WILL PREVAIL OUTSIDE OF THUNDERSTORM ACTIVITY OVER
THE NEXT 6 OR SO HOURS. THE ONLY EXCEPTION IS AT KBVO WHERE MVFR
CIGS REMAIN ON THE NORTH SIDE OF AN OUTFLOW BOUNDARY. STRONG
WINDS AND LOWER VSBYS INTO THE MVFR OR IFR RANGE CAN BE EXPECTED
WITH THE STRONGER STORMS. STORMS SHOULD BE GONE BY EARLY TUESDAY
MORNING...BUT LOW LVL MOISTURE RETURN WILL LEAD TO A PERIOD OF
MVFR CIGS AT MOST OF THE TAF SITES. CONDITIONS WILL TREND TOWARD
VFR BY MIDDAY...AND WILL REMAIN THERE FOR THE REMAINDER OF THE
PERIOD. STRONG SOUTH WINDS WILL GUST AOA 25 KTS AT THE NE OK AND
NW AR SITES ON TUESDAY.

LACY

&&

.PREV DISCUSSION... /ISSUED 950 PM CDT MON APR 30 2012/

..UPDATE...

DISCUSSION...
STRONG CONVECTION CONTINUES ALONG AND NEAR THE OKLAHOMA/KANSAS
BORDER THIS EVENING...MAINLY OVER NORTHERN NOWATA AND CRAIG
COUNTIES. ADDITIONAL STRONG CONVECTION RESIDED OVER NORTH CENTRAL
AND SOUTHWEST OKLAHOMA MOVING EASTWARD. THIS ACTIVITY WILL
CONTINUE TO DEVELOP AND PUSH EASTWARD INTO THE REGION THROUGH THE
EVENING AND INTO THE OVERNIGHT HOURS AS INSTABILITY REMAINS
FAVORABLE. LARGE HAIL...DAMAGING WINDS WITH ALSO A TORNADO THREAT
CONTINUES WITH THESE STRONG TO SEVERE STORMS. A TORNADO WATCH
REMAINS IN EFFECT FOR MOST OF NORTHEAST OKLAHOMA AND ALSO FAR
NORTHWEST ARKANSAS UNTIL 07 UTC. EVENING UPDATE WILL BE TO UP POPS
ALONG THE KANSAS BORDER FOR OVERNIGHT AND TWEAKED SKY/TEMP GRIDS
AS WELL. THE REST OF THE FORECAST LOOK TO BE GOOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   81  65  85  68 / MMM  80  30  10
FSM   79  66  85  67 / MMM  40  20  10
MLC   80  67  85  68 / MMM  40  20  10
BVO   80  64  83  66 / MMM  80  40  10
FYV   76  64  82  65 / MMM  50  30  10
BYV   78  64  82  64 / MMM  50  30  10
MKO   80  66  84  67 / MMM  80  30  10
MIO   78  64  83  66 / MMM  80  40  10
F10   81  66  84  67 / MMM  80  30  10
HHW   81  67  85  68 / MMM  40  20  10

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...FLASH FLOOD WATCH UNTIL 7 AM TUESDAY FOR OKZ054-OKZ055-OKZ056-
     OKZ057-OKZ058-OKZ059.

AR...NONE.
&&

AVIATION...30

Hazardous weather outlook, Apr 30, 8:16 PM CDT, 3 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
816 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-
808 PM CDT MON APR 30 2012

...STRONG TO SEVERE THUNDERSTORMS POSSIBLE AGAIN TONIGHT...

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

.DAY ONE...TONIGHT.
TORNADO.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

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

FLASH FLOOD.
	RISK...ELEVATED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...ONGOING.

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

DISCUSSION...
THUNDERSTORMS HAVE DEVELOPED ACROSS PORTIONS OF NORTHEAST OKLAHOMA
THIS EVENING...WHILE A THUNDERSTORM COMPLEX DEVELOPS PUSHING
EASTWARD OVER WESTERN OKLAHOMA AND SOUTHERN KANSAS. THESE
THUNDERSTORMS...SOME OF WHICH COULD BECOME SEVERE...WILL CONTINUE
TO DEVELOP AND SPREAD ACROSS EASTERN OKLAHOMA AND NORTHWEST
ARKANSAS THIS EVENING AND OVERNIGHT. FAVORABLE INSTABILITY ACROSS
THE REGION WILL SUPPORT LARGE HAIL AND DAMAGING WINDS ALONG WITH A
TORNADO THREAT TONIGHT. A FLASH FLOOD POTENTIAL WILL ALSO CONTINUE
FOR FOR LOCATIONS NEAR THE OKLAHOMA AND KANSAS BORDERS AS HEAVY
RAINS ARE PROBABLE ACROSS AREAS THAT RECEIVED FLOODING RAINS LAST
NIGHT.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
ACTIVATION OF THE REGIONAL SPOTTER NETWORK LIKELY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
WEDNESDAY...HIGH WIND POTENTIAL.
THURSDAY THROUGH 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

Local storm report, Apr 30, 8:14 PM CDT, 3 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
814 PM CDT MON APR 30 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0810 PM     TORNADO          4 W NOWATA              36.70N 95.71W
04/30/2012                   NOWATA             OK   AMATEUR RADIO

            SPOTTER REPORTED A BRIEF TORNADO TOUCHDOWN.

&&

SFP

Local storm report, Apr 30, 8:16 PM CDT, 3 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
816 PM CDT MON APR 30 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0815 PM     TORNADO          5 W NOWATA              36.70N 95.73W
04/30/2012                   NOWATA             OK   TRAINED SPOTTER

            W410 RD AND N24 RD. SEVERAL BRIEF TOUCHDOWNS.

&&

AEJ

Local storm report, Apr 30, 8:26 PM CDT, 3 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
826 PM CDT MON APR 30 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0825 PM     TORNADO          4 NW NOWATA             36.74N 95.69W
04/30/2012                   NOWATA             OK   AMATEUR RADIO

            SPOTTER REPORTED A SMALL TORNADO TOUCHDOWN...WITH A FEW
            POWER FLASHES

&&

SFP

Local storm report, Apr 30, 9:02 PM CDT, 2 hours 40 minutes before

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Local storm report, Apr 30, 9:38 PM CDT, 2 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
938 PM CDT MON APR 30 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0755 PM     TSTM WND DMG     8 WSW NOWATA            36.66N 95.77W
04/30/2012                   NOWATA             OK   EMERGENCY MNGR

            HOME DAMAGE NEAR THE INTERSECTION OF 4060 RD AND 2400 RD
            SW OF NOWATA. POSSIBLE TORNADO DAMAGE. TIME ESTIMATED BY
            RADAR.

&&

AEJ

Special weather statement, Apr 30, 11:42 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1142 PM CDT MON APR 30 2012

OKZ060-064-065-010530-
CREEK OK-OKFUSKEE OK-TULSA OK-
1142 PM CDT MON APR 30 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 1230 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     CREEK AND WESTERN TULSA

IN EAST CENTRAL OKLAHOMA
     NORTHWESTERN OKFUSKEE

AT 1142 PM CDT...STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES WEST OF OILTON TO 11 MILES WEST OF MILFAY TO
20 MILES WEST OF PADEN...MOVING EAST AT 40 MPH. SOME LOCATIONS THAT
WILL BE AFFECTED BY THESE STORMS INCLUDE...TULSA...GRAY...CASTLE...
PADEN...BOLEY...MASON...WELTY...SAND SPRINGS...BRISTOW...MILFAY...
SLICK...DEPEW...SHAMROCK...DRUMRIGHT...OILTON...SILVER CITY...
MANNFORD...KELLYVILLE...SAPULPA AND KEYSTONE STATE PARK.

THESE STORMS WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL. THESE
STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH. RESIDENTS
IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT WEATHER
ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3615 9663 3616 9607 3585 9615 3585 9619
      3575 9619 3548 9632 3544 9644 3545 9645
      3545 9648 3542 9650 3545 9655 3541 9654
      3539 9662
TIME...MOT...LOC 0442Z 271DEG 33KT 3606 9664 3580 9670
          3559 9686

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	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
May 1, 3:44 AM CDT	Special Weather Statement	TSA	Benton	46 min
May 1, 3:47 AM CDT	Special Weather Statement	TSA	Crawford	43 min
May 1, 4:12 AM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	43 min
May 1, 4:13 AM CDT	Special Weather Statement	TSA	Crawford, Franklin, Sebastian	62 min
May 1, 4:34 AM CDT	Special Weather Statement	TSA	Carroll	41 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.