Alert archive / Oklahoma / Tornado Warnings in 2015

Tornado Warning 19, NWS Tulsa, OK

April 3, 2015Ottawa County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 3, 2015, 2:42 AM CDT for Ottawa County, Oklahoma. It was in force for 17 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 3, 2015, 2:42 AM CDT (07:42 UTC)
Expired: Apr 3, 2015, 2:59 AM CDT
In force: 17 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Ottawa County, OK

The radar

The Tulsa radar (KINX), 115 km from the middle of the area, began a volume at 07:41 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 2, 7:02 PM CDT	Tornado Watch	SPC	8 hr
Apr 3, 1:52 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 7.7 hours before the alert went out and 81 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: 1838 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1146 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

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

918 
WFUS54 KTSA 030742
TORTSA
OKC115-030815-
/O.NEW.KTSA.TO.W.0019.150403T0742Z-150403T0815Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
242 AM CDT FRI APR 3 2015

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN OTTAWA COUNTY IN NORTHEAST OKLAHOMA...

* UNTIL 315 AM CDT

* AT 238 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR COMMERCE...AND MOVING EAST AT 55 MPH.

  HAZARD...TORNADO.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
           TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
           LIKELY.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...PEORIA.

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 310 AND 324.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. GO TO A DESIGNED SHELTER SUCH AS A SAFE ROOM OR STORM
CELLAR IF AVAILABLE. OTHERWISE...MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF SEEKING SHELTER
IN A BASEMENT...BE SURE TO GET BENEATH SOMETHING STURDY. IF IN A
MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3700 9461 3683 9461 3690 9491 3700 9491
      3700 9462
TIME...MOT...LOC 0741Z 282DEG 46KT 3695 9480

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

LACY

2 follow-up statements

999 
WWUS54 KTSA 030748
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
248 AM CDT FRI APR 3 2015

OKC115-030815-
/O.CON.KTSA.TO.W.0019.000000T0000Z-150403T0815Z/
OTTAWA OK-
248 AM CDT FRI APR 3 2015

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN OTTAWA COUNTY
UNTIL 315 AM CDT...

AT 246 AM CDT...A CONFIRMED TORNADO WAS LOCATED 3 MILES SOUTHEAST OF 
QUAPAW...AND MOVING EAST AT 55 MPH.

HAZARD...DAMAGING TORNADO.

SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT
         SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS
         LIKELY.

LOCATIONS IN OR NEAR THE PATH INCLUDE...PEORIA

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 311 AND 324.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. GO TO A
DESIGNED SHELTER SUCH AS A SAFE ROOM OR STORM CELLAR IF AVAILABLE.
OTHERWISE...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. AVOID WINDOWS. IF SEEKING SHELTER IN A BASEMENT...BE SURE
TO GET BENEATH SOMETHING STURDY. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

THIS STORM HAS A HISTORY OF PRODUCING TORNADOES. TAKE COVER IN A
BASEMENT OR STORM SHELTER NOW!

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

&&

LAT...LON 3700 9461 3683 9461 3690 9484 3700 9479
TIME...MOT...LOC 0748Z 282DEG 46KT 3693 9469

TORNADO...OBSERVED
HAIL...<.75IN

$$

LACY

851 
WWUS54 KTSA 030759
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
259 AM CDT FRI APR 3 2015

OKC115-030809-
/O.CAN.KTSA.TO.W.0019.000000T0000Z-150403T0815Z/
OTTAWA OK-
259 AM CDT FRI APR 3 2015

...THE TORNADO WARNING FOR NORTHEASTERN OTTAWA COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 6 AM.

LAT...LON 3700 9461 3683 9461 3690 9484 3700 9479
TIME...MOT...LOC 0759Z 282DEG 46KT 3690 9452

$$

LACY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 8:08 PM CDT	Special Weather Statement	TSA	Rogers	52 min
Apr 2, 8:21 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	39 min
Apr 2, 8:24 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	51 min
Apr 2, 8:55 PM CDT	Special Weather Statement	TSA	Osage	35 min
Apr 2, 8:58 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	47 min
Apr 2, 9:00 PM CDT	Special Weather Statement	TSA	Craig	30 min
Apr 2, 9:03 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	42 min
Apr 2, 9:09 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	21 min
Apr 2, 9:11 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	49 min
Apr 2, 9:18 PM CDT	Tornado Warning	TSA	Craig, Nowata	27 min
Apr 2, 9:36 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	39 min
Apr 2, 9:41 PM CDT	Special Weather Statement	TSA	Delaware	34 min
Apr 2, 9:44 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	61 min
Apr 2, 9:48 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	42 min
Apr 2, 10:01 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	44 min
Apr 2, 10:02 PM CDT	Tornado Warning	TSA	Craig, Delaware, Ottawa	43 min
Apr 2, 10:42 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	48 min
Apr 2, 10:43 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	17 min
Apr 2, 11:14 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	21 min
Apr 3, 2:08 AM CDT	Tornado Warning	TSA	Craig, Ottawa	37 min
Apr 3, 6:15 AM CDT	Wind Advisory	TSA	Craig, Creek, Delaware, Mayes, Nowata, Ottawa and 5 more	7 hr
Apr 3, 2:40 PM CDT	Frost Advisory	TSA	Adair, Cherokee, Craig, Creek, Delaware, McIntosh and 11 more	18 hr

Nearby

Tornado Warnings in Oklahoma, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.