Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 48, NWS Tulsa, OK

April 10, 2016Nowata County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 10, 2016, 7:22 PM CDT for Nowata County, Washington County, Oklahoma. It was in force for 38 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 10, 2016, 7:22 PM CDT (00:22 UTC)
Expired: Apr 10, 2016, 8:00 PM CDT
In force: 38 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Nowata County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 86 km from the middle of the area, began a volume at 00:24 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.

What was reported inside it

Time	Report	Where	Remark
Apr 10, 7:59 PM CDT	HAIL 1	3 Ne Copan, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 37 minutes after it went out.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 10, 5:31 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.4 hours before the alert went out and 174 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: 312 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 223 m²/s²
0-3 km storm-relative helicity: 266 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

518 
WUUS54 KTSA 110022
SVRTSA
OKC105-147-110100-
/O.NEW.KTSA.SV.W.0048.160411T0022Z-160411T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
722 PM CDT SUN APR 10 2016

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN NOWATA COUNTY IN NORTHEASTERN OKLAHOMA...
  NORTHERN WASHINGTON COUNTY IN NORTHEASTERN OKLAHOMA...

* UNTIL 800 PM CDT

* AT 722 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER COPAN...MOVING
  EAST AT 30 MPH.

  HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  SOUTH COFFEYVILLE...              COPAN...
  WANN...                           

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3689 9551 3682 9600 3699 9600 3700 9599
      3700 9556
TIME...MOT...LOC 0022Z 250DEG 27KT 3691 9595 

HAIL...1.25IN
WIND...60MPH
 
$$

2 follow-up statements

149 
WWUS54 KTSA 110036
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
736 PM CDT SUN APR 10 2016

OKC105-147-110100-
/O.CON.KTSA.SV.W.0048.000000T0000Z-160411T0100Z/
NOWATA OK-WASHINGTON OK-
736 PM CDT SUN APR 10 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHWESTERN NOWATA AND NORTHERN WASHINGTON COUNTIES...

AT 736 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES NORTHWEST OF
WANN...MOVING EAST AT 30 MPH.

HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
         TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
         ROOFS...AND OUTBUILDINGS. 

LOCATIONS IN OR NEAR THE PATH INCLUDE...
SOUTH COFFEYVILLE...              COPAN...
WANN...                           

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3689 9551 3684 9600 3699 9600 3700 9599
      3700 9556
TIME...MOT...LOC 0036Z 257DEG 27KT 3694 9585 

HAIL...1.00IN
WIND...70MPH
 
$$

012 
WWUS54 KTSA 110046
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
746 PM CDT SUN APR 10 2016

OKC105-147-110100-
/O.CON.KTSA.SV.W.0048.000000T0000Z-160411T0100Z/
NOWATA OK-WASHINGTON OK-
746 PM CDT SUN APR 10 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHWESTERN NOWATA AND NORTHEASTERN WASHINGTON COUNTIES...

AT 746 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WANN...MOVING
EAST AT 25 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IN OR NEAR THE PATH INCLUDE...
SOUTH COFFEYVILLE...              WANN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3689 9551 3688 9587 3696 9595 3700 9594
      3700 9556
TIME...MOT...LOC 0046Z 260DEG 23KT 3694 9582 

HAIL...1.00IN
WIND...60MPH
 
$$

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 10, 6:34 PM CDT, 48 minutes earlier.

Area forecast discussion, Apr 10, 6:34 PM CDT, 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE Tulsa OK
634 PM CDT SUN APR 10 2016

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.
Convection will develop and expand this evening across NE OK with
further development eastward and southward overnight. Flight
conditions will generally be impacted by both lowering overnight
ceilings and with expanding coverage of heavier convection.
Widespread MVFR to periodic IFR conditions can be expected into
Monday morning...with a gradual improving trend from north to
south during the day Monday as convection shifts southward.

&&

.PREV DISCUSSION... /ISSUED 305 PM CDT SUN APR 10 2016/

DISCUSSION...
Current surface analysis depicts cold front stretching from
eastern KS into the OK panhandle...with dryline into northwestern
OK southward into the TX panhandle. Some convection has fired near
the dryline across the TX panhandle over the past 1-2 hours...and
latest HRRR output suggests that some of this activity will make a
run east toward our forecast area during the evening hours. Also
anticipating an increase in convection along the front across
southern KS this evening as the low-level jet strengthens and
backs. While the southern activity may have a tendency to weaken
with time as it tracks east...clusters of storms associated with
the front will impact parts of northeast OK and eventually
northwest AR later tonight...with large hail/strong winds/heavy
rainfall being the main threat.

With the approach of a triple-point low...the severe weather
threat will transition into southeast OK/western AR Monday
afternoon. At least modest afternoon heating will mixed-layer CAPE
values around 2000-3000 J/kg in the smallish warm sector...and any
backed low-level flow ahead of triple-point will enhance the
tornado threat. This activity will shift east with time...with the
severe threat diminishing toward midnight.

Another weaker upper low will move through the area by mid-
week...although prevailing surface ridging should keep the bulk of
the better moisture south of the forecast area.

A deep west coast trof will develop going into the weekend...with
shower/thunderstorm chances increasing especially in the latter
half of the weekend. The extended models are still struggling with
how this system evolves/ejects east...so will continue to keep
pops in the chance category.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   62  69  40  65 /  90  60  10   0
FSM   64  76  46  66 /  30  80  60   0
MLC   66  72  47  67 /  50  60  20   0
BVO   56  64  36  64 /  90  60  10   0
FYV   60  66  40  61 /  70  80  50   0
BYV   59  62  38  61 /  80  80  50   0
MKO   63  70  41  65 /  70  70  20   0
MIO   57  63  37  62 /  90  80  20   0
F10   63  70  43  65 /  60  60  10   0
HHW   65  76  51  67 /  30  60  20   0

&&

.TSA Watches/Warnings/Advisories...
OK...NONE.
AR...NONE.
&&

AVIATION...07

Hazardous weather outlook, Apr 10, 4:55 PM CDT, 2 hours 27 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
455 PM CDT SUN APR 10 2016

ARZ001-002-010-011-019-020-029-OKZ049-053>076-111030-
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-
455 PM CDT SUN APR 10 2016

...SEVERE WEATHER THREAT INCREASES THIS EVENING AND CONTINUES INTO MONDAY...

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

.DAY ONE...TODAY AND TONIGHT.
TORNADO.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...THIS EVENING.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND WESTERN ARKANSAS.
	ONSET...THIS EVENING.

	AREA AT GREATEST RISK...NORTHEAST OKLAHOMA .

FLASH FLOOD.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...TONIGHT.

HEAVY RAIN.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...TONIGHT.

DISCUSSION...
AN ELEVATED SEVERE THUNDERSTORM POTENTIAL WILL EXIST THIS EVENING
AND OVERNIGHT...PRIMARILY ACROSS PORTIONS OF NORTHEAST OKLAHOMA
ALONG AND TO THE NORTHWEST OF INTERSTATE 44. THUNDERSTORMS ARE
EXPECTED TO DEVELOP THIS EVENING ALONG AN APPROACHING COLD
FRONT...AND EXPAND IN COVERAGE TONIGHT AS A LOW LEVEL JET
STRENGTHENS. THUNDERSTORMS TONIGHT MOST LIKELY WILL BE ELEVATED
...LEADING TO LARGE HAIL POTENTIALLY TO THE SIZE OF TENNIS BALLS.
HOWEVER...A LOW POTENTIAL FOR DAMAGING WIND GUSTS IN THE 60 TO 70
MPH RANGE AND ISOLATED TORNADOES EXISTS AS WELL. LOCALLY HEAVY
RAINFALL COULD LEAD TO FLASH FLOODING AS WELL...ESPECIALLY IN
FLOOD PRONE AREAS.

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

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
MONDAY...SEVERE THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
TUESDAY THROUGH FRIDAY...NO HAZARDS.
SATURDAY...THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.

EXTENDED DISCUSSION...
THUNDERSTORMS LIKELY WILL BE ONGOING MONDAY MORNING ACROSS PORTIONS OF
NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS...WITH AT MOST...ISOLATED
SEVERE WEATHER LIKELY OCCURRING AT THAT TIME. ADDITIONAL THUNDERSTORM
DEVELOPMENT IS EXPECTED ACROSS SOUTHERN OKLAHOMA AND INTO WEST
CENTRAL ARKANSAS DURING THE AFTERNOON HOURS MONDAY...AND WILL ALSO
CARRY AN ELEVATED RISK OF SEVERE WEATHER. LARGE HAIL AND DAMAGING
WINDS WILL BE THE PRIMARY SEVERE WEATHER THREATS...ALTHOUGH A
SMALL TORNADO THREAT WILL EXIST WITH ANY THUNDERSTORMS THAT
DEVELOP WELL AHEAD OF THE COLD FRONT. THE BULK OF THE THUNDERSTORM
ACTIVITY SHOULD BE SOUTH AND EAST OF THE REGION BY EARLY TUESDAY
MORNING.

QUIET WEATHER WILL THEN PREVAIL FOR THE REMAINDER OF THE UPCOMING
WORK WEEK...WITH THE NEXT NOTABLE STORM SYSTEM SET TO IMPACT THE
REGION NEXT WEEKEND.
EMERGENCY MANAGEMENT PLANNING STATEMENT...

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

In the hours before

Special weather statement, Apr 10, 7:06 PM CDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
706 PM CDT SUN APR 10 2016

OKZ054-110045-
OSAGE OK-
706 PM CDT SUN APR 10 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN OSAGE COUNTY UNTIL
745 PM CDT...

AT 706 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 8 MILES SOUTHWEST
OF PAWHUSKA...MOVING NORTHEAST AT 35 MPH.

NICKEL SIZE HAIL AND WIND GUSTS OF 50 TO 55 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IN OR NEAR THE PATH INCLUDE...
PAWHUSKA...                       OSAGE HILLS STATE PARK...
OKESA...                          BIGHEART...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
NORTHEASTERN OKLAHOMA.

LAT...LON 3650 9648 3664 9661 3696 9622 3673 9606
TIME...MOT...LOC 0006Z 231DEG 30KT 3662 9648

Special weather statement, Apr 10, 7:17 PM CDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
717 PM CDT SUN APR 10 2016

OKZ055-056-110100-
NOWATA OK-WASHINGTON OK-
717 PM CDT SUN APR 10 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN NOWATA AND NORTHERN
WASHINGTON COUNTIES UNTIL 800 PM CDT...

AT 717 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR COPAN...MOVING
NORTHEAST AT 40 MPH.

NICKEL SIZE HAIL AND WIND GUSTS OF 50 TO 55 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IN OR NEAR THE PATH INCLUDE...
SOUTH COFFEYVILLE...              COPAN...
WANN...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
NORTHEASTERN OKLAHOMA.

LAT...LON 3698 9541 3680 9599 3682 9600 3698 9600
      3700 9595 3700 9541
TIME...MOT...LOC 0017Z 242DEG 34KT 3689 9596

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:06 PM CDT	Special Weather Statement	TSA	Osage	39 min
Apr 10, 7:11 PM CDT	Severe Thunderstorm Warning	TSA	Osage	49 min
Apr 10, 7:17 PM CDT	Special Weather Statement	TSA	Nowata	43 min
Apr 10, 7:57 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	33 min
Apr 10, 7:58 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	47 min
Apr 10, 8:43 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	47 min
Apr 10, 9:11 PM CDT	Severe Thunderstorm Warning	TSA	Osage	49 min
Apr 10, 9:34 PM CDT	Severe Thunderstorm Warning	TSA	Osage	56 min
Apr 10, 10:00 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	45 min
Apr 10, 10:43 PM CDT	Special Weather Statement	TSA	Craig	47 min
Apr 11, 12:47 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	43 min
Apr 11, 12:59 AM CDT	Severe Thunderstorm Warning	TSA	Pawnee	17 min
Apr 11, 1:19 AM CDT	Special Weather Statement	TSA	McIntosh, Okmulgee	41 min
Apr 11, 1:34 AM CDT	Severe Thunderstorm Warning	TSA	Creek	26 min
Apr 11, 1:39 AM CDT	Special Weather Statement	TSA	Tulsa	36 min
Apr 11, 1:47 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee	28 min
Apr 11, 2:02 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Tulsa	43 min
Apr 11, 2:27 AM CDT	Special Weather Statement	TSA	Pushmataha	48 min
Apr 11, 3:23 AM CDT	Special Weather Statement	TSA	LeFlore	37 min
Apr 11, 7:39 AM CDT	Special Weather Statement	TSA	Choctaw	36 min
Apr 11, 8:02 AM CDT	Special Weather Statement	TSA	Pushmataha	13 min
Apr 11, 8:17 AM CDT	Special Weather Statement	TSA	Choctaw	28 min
Apr 11, 8:45 AM CDT	Special Weather Statement	TSA	Pushmataha	30 min
Apr 11, 8:49 AM CDT	Special Weather Statement	TSA	Pushmataha	26 min
Apr 11, 2:28 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	32 min
Apr 11, 2:57 PM CDT	Special Weather Statement	TSA	Pushmataha	48 min
Apr 11, 3:12 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	48 min
Apr 11, 3:14 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	16 min
Apr 11, 3:58 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	32 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.