Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 57, NWS Tulsa, OK

April 23, 2013Creek County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 23, 2013, 2:18 AM CDT for Creek 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 23, 2013, 2:18 AM CDT (07:18 UTC)
Expired: Apr 23, 2013, 2:45 AM CDT
In force: 27 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Creek County, OK

The radar

The Tulsa radar (KINX), 78 km from the middle of the area, began a volume at 07:21 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.3 hours before the alert went out and 119 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: 150 J/kg
Mixed-layer CIN: -219 J/kg
Mixed-layer LCL: 1572 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

542 
WUUS54 KTSA 230718
SVRTSA
OKC037-230745-
/O.NEW.KTSA.SV.W.0057.130423T0718Z-130423T0745Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
218 AM CDT TUE APR 23 2013

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CREEK COUNTY IN NORTHEAST OKLAHOMA...

* UNTIL 245 AM CDT

* AT 217 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES NORTHWEST
  OF DEPEW...MOVING EAST AT 40 MPH.

  STORM HAZARDS INCLUDE...
  QUARTER SIZE HAIL...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...DEPEW...
  BRISTOW...SLICK AND KELLYVILLE.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 180 AND 202.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTDOORS SHOULD MOVE INSIDE A STURDY BUILDING. STAY AWAY FROM
WINDOWS AND DOORS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3597 9620 3578 9619 3577 9658 3589 9660
TIME...MOT...LOC 0718Z 263DEG 35KT 3584 9653

$$

LACY

2 follow-up statements

699 
WWUS54 KTSA 230726
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
226 AM CDT TUE APR 23 2013

OKC037-230745-
/O.CON.KTSA.SV.W.0057.000000T0000Z-130423T0745Z/
CREEK OK-
226 AM CDT TUE APR 23 2013

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM CDT FOR
CENTRAL CREEK COUNTY...

AT 225 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR BRISTOW...
MOVING EAST AT 40 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...BRISTOW
AND KELLYVILLE.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 187 AND 202.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTDOORS SHOULD MOVE INSIDE A STURDY BUILDING. STAY AWAY FROM
WINDOWS AND DOORS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3597 9620 3579 9619 3578 9620 3579 9645
      3588 9649
TIME...MOT...LOC 0727Z 263DEG 35KT 3584 9641

$$

LACY

034 
WWUS54 KTSA 230738
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
238 AM CDT TUE APR 23 2013

OKC037-230748-
/O.EXP.KTSA.SV.W.0057.000000T0000Z-130423T0745Z/
CREEK OK-
238 AM CDT TUE APR 23 2013

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CREEK COUNTY EXPIRES
AT 245 AM CDT...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
SEVERE THUNDERSTORM WARNING WILL BE ALLOWED TO EXPIRE.

SMALL HAIL AND HEAVY RAIN WILL STILL BE POSSIBLE WITH THIS STORM.

LAT...LON 3597 9620 3579 9619 3578 9620 3579 9645
      3588 9649
TIME...MOT...LOC 0738Z 263DEG 35KT 3585 9628

$$

LACY

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 22, 11:57 PM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Apr 22, 11:57 PM CDT, 2 hours 21 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1157 PM CDT MON APR 22 2013

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
FOR THE 6Z TAFS... THUNDERSTORMS WILL CONTINUE TO BECOME MORE
NUMEROUS ACROSS THE REGION DURING THE NIGHT... AFFECTING ALL TAF
SITES. A STRONG COLD FRONT WILL PUSH ACROSS THE REGION TUESDAY
MORNING... WITH STRONG AND GUSTY NORTHERLY WINDS AREAWIDE BEHIND THE
FRONT. MVFR... AND POSSIBLY IFR CEILINGS WILL AFFECT ALL SITES
AFTER FRONTAL PASSAGE AND THROUGHOUT THE REMAINDER OF THE 24 HOUR
FORECAST PERIOD.

&&

.PREV DISCUSSION... /ISSUED 941 PM CDT MON APR 22 2013/

..UPDATE...

DISCUSSION...
STRONG COLD FRONT CURRENTLY ARCING ACROSS NORTHWEST OK WILL MAKE
STEADY PROGRESS EASTWARD OVERNIGHT...WITH GUSTY WINDS AND SHARPLY
COLDER TEMPERATURES IN ITS WAKE. EVENING CONVECTION IS LARGELY
WEAKENING AS BOUNDARY LAYER STABILIZES...HOWEVER AN UPTICK IN
CONVECTIVE ACTIVITY IS LIKELY DURING THE OVERNIGHT HOURS AS THE
LOW LEVEL JET STRENGTHENS AND INTERACTS WITH THE FRONTAL ZONE. THE
STRONGER ELEVATED INSTABILITIES REMAIN FORECAST TO REMAIN FROM
CENTRAL INTO SE OK...WHICH WILL LIMIT OVERNIGHT SVR WX CHANCES.
THE UPDATED FORECAST WILL ADJUST FOR FRONTAL TIMING GIVEN THE
LATEST DATA AND INCREASE POST FRONTAL SUSTAINED WINDS AND GUSTS
THROUGH TUESDAY MORNING. OTHERWISE MOST ELEMENTS REMAIN ON TRACK
WITH ONLY MINOR ADJUSTMENTS BASED ON OBSERVED TRENDS.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

AVIATION...06

Hazardous weather outlook, Apr 22, 9:53 PM CDT, 4 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
953 PM CDT MON APR 22 2013

ARZ001-002-010-011-019-020-029-OKZ049-053>076-231000-
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-
952 PM CDT MON APR 22 2013

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

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...NORTHWEST OF A MCALESTER TO FAYETTEVILLE LINE.
	ONSET...AFTER 10 PM.

FLASH FLOOD.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...AFTER MIDNIGHT.

SIGNIFICANT WINDS.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...AFTER MIDNIGHT.

DISCUSSION...
THUNDERSTORMS WILL CONTINUE TO EXPAND ACROSS NORTHEAST OKLAHOMA
OVERNIGHT AHEAD OF A STRONG COLD FRONT...WITH A GRADUAL EXPANSION
INTO NORTHWEST ARKANSAS AND PORTIONS OF SOUTHEAST OKLAHOMA
LATE TONIGHT.  ISOLATED SEVERE WEATHER WILL REMAIN POSSIBLE
OVERNIGHT WITH LARGE HAIL BEING THE RISK.  OTHERWISE...AREAS OF
HEAVY RAIN ARE EXPECTED TO DEVELOP ACROSS NORTHEAST OKLAHOMA
TONIGHT WITH LOCALIZED FLOODING POSSIBLE.  NORTHWEST WINDS GUSTING
30 TO 40 MPH WILL SPREAD ACROSS NORTHEAST OKLAHOMA TONIGHT
BEHIND THE COLD FRONT.

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...NO HAZARDS.
THURSDAY...THUNDERSTORM POTENTIAL.
FRIDAY...THUNDERSTORM POTENTIAL...HEAVY RAIN POTENTIAL.
SATURDAY...THUNDERSTORM POTENTIAL.
SUNDAY...NO HAZARDS.

EXTENDED DISCUSSION...
THUNDERSTORMS WILL CONTINUE THROUGH THURSDAY MORNING AS THE
COLD FRONT SLOWLY PUSHES THROUGH FAR EASTERN OKLAHOMA AND
WESTERN ARKANSAS.  THE SEVERE WEATHER POTENTIAL LOOKS TO REMAIN
VERY LOW DURING THIS TIMEFRAME...WITH MUCH COLDER TEMPERATURES
AND STRONG NORTHERLY WINDS EXPECTED BEHIND THE FRONT.
THE NEXT STORM SYSTEM WILL RETURN THUNDERSTORM CHANCES ON
THURSDAY...AND BECOME MORE WIDESPREAD WITH LOCALLY HEAVY RAINS
FRIDAY INTO SATURDAY.

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

In the hours before

Special weather statement, Apr 23, 1:56 AM CDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
156 AM CDT TUE APR 23 2013

OKZ064-065-230730-
CREEK OK-OKFUSKEE OK-
156 AM CDT TUE APR 23 2013

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 230 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     SOUTHERN CREEK

IN EAST CENTRAL OKLAHOMA
     NORTHWESTERN OKFUSKEE

AT 156 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES SOUTHWEST
OF MILFAY...MOVING EAST AT 50 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...OKFUSKEE...WELTY...MILFAY AND SLICK.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL.

BE ALERT IN CASE A WARNING IS ISSUED ON THIS STORM.

LAT...LON 3580 9663 3580 9619 3556 9619 3561 9663
TIME...MOT...LOC 0656Z 274DEG 43KT 3569 9660

LACY

Special weather statement, Apr 23, 2:03 AM CDT, 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
203 AM CDT TUE APR 23 2013

OKZ064-230730-
CREEK OK-
203 AM CDT TUE APR 23 2013

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 230 AM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
     CENTRAL CREEK

AT 203 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 8 MILES SOUTHWEST
OF SHAMROCK...MOVING NORTHEAST AT 40 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...BRISTOW...DEPEW...SHAMROCK AND
KELLYVILLE.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL.

BE ALERT IN CASE THIS ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3583 9662 3596 9662 3610 9632 3589 9613
      3574 9663 3583 9663
TIME...MOT...LOC 0703Z 247DEG 37KT 3583 9666

LACY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 1:56 AM CDT	Special Weather Statement	TSA	Okfuskee	34 min
Apr 23, 2:03 AM CDT	Special Weather Statement	TSA	Creek	27 min
Apr 23, 2:15 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	30 min
Apr 23, 2:43 AM CDT	Special Weather Statement	TSA	Okmulgee	32 min
Apr 23, 2:52 AM CDT	Special Weather Statement	TSA	Tulsa	23 min
Apr 23, 3:29 AM CDT	Special Weather Statement	TSA	Craig, Nowata	46 min
Apr 23, 9:54 AM CDT	Frost Advisory	TSA	Cherokee, Craig, Creek, Delaware, Mayes, Muskogee and 9 more	22 hr
Apr 23, 4:15 PM CDT	Freeze Warning	TSA	Craig, Nowata, Ottawa, Pawnee, Washington	16 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2013 Every severe thunderstorm warning in 2013

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.