Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 417, NWS Tulsa, OK

June 15, 2008Osage County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 15, 2008, 5:45 AM CDT for Osage County, Washington County, Oklahoma. It was in force for 45 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: Jun 15, 2008, 5:45 AM CDT (10:45 UTC)
Expired: Jun 15, 2008, 6:30 AM CDT
In force: 45 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Osage County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 92 km from the middle of the area, began a volume at 11:02 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

Lamont, OK (KLMN), launched 00:00Z, 10.8 hours before the alert went out and 144 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: 1377 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1862 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 151045
SVRTSA
OKC113-147-151130-
/O.NEW.KTSA.SV.W.0417.080615T1045Z-080615T1130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
545 AM CDT SUN JUN 15 2008

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 630 AM CDT

* AT 541 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL AND WINDS
  TO 60 MPH. THIS STORM WAS LOCATED NEAR HULAH AND WAS NEARLY
  STATIONARY.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...COPAN.

STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3700 9582 3684 9584 3693 9607 3700 9605
TIME...MOT...LOC 1045Z 263DEG 2KT 3696 9601

$$

2 follow-up statements

000 
WWUS54 KTSA 151109
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
609 AM CDT SUN JUN 15 2008

OKC147-151130-
/O.CON.KTSA.SV.W.0417.000000T0000Z-080615T1130Z/
WASHINGTON OK-
609 AM CDT SUN JUN 15 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM CDT
FOR WASHINGTON COUNTY...

AT 606 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL
AND WINDS TO 60 MPH. THIS STORM WAS LOCATED NEAR COPAN AND WAS
DRIFTING SLOWLY EAST.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...COPAN.

STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3700 9582 3685 9584 3684 9585 3689 9597
      3689 9598 3690 9598 3690 9599 3690 9601
      3700 9600
TIME...MOT...LOC 1109Z 263DEG 2KT 3695 9599

$$

000 
WWUS54 KTSA 151121
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
621 AM CDT SUN JUN 15 2008

OKC147-151131-
/O.EXP.KTSA.SV.W.0417.000000T0000Z-080615T1130Z/
WASHINGTON OK-
621 AM CDT SUN JUN 15 2008

...THE SEVERE THUNDERSTORM WARNING FOR WASHINGTON COUNTY EXPIRES AT
630 AM CDT...

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

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

LAT...LON 3700 9582 3685 9584 3684 9585 3689 9597
      3689 9598 3690 9598 3690 9599 3690 9601
      3700 9600
TIME...MOT...LOC 1121Z 263DEG 2KT 3695 9598

$$

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 Jun 15, 3:03 AM CDT, 2 hours 42 minutes earlier.

Area forecast discussion, Jun 15, 3:03 AM CDT, 2 hours 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
303 AM CDT SUN JUN 15 2008

.DISCUSSION...
QUIET NIGHT FOR A CHANGE OVER THE FA. EXPECT SETTLED WEATHER FOR
MOST OF TODAY...HOWEVER AS HAS BEEN HINTED AT THE LAST SEVERAL MODEL
RUNS...MCS QUICKLY DEVELOPS ACROSS THE HIGH PLAINS BY THIS AFTERNOON
AND BE ON A FAST...DUE SOUTH TRACK TOWARDS ERN OK AND NW AR BY THIS
EVENING. A QUICK FORWARD PROPAGATION SUGGESTS A DAMAGING WIND
POTENTIAL ALONG THE LEADING EDGE OF THE COMPLEX. WHILE MODEL QPF
TOTALS ARE HIGH...CURRENT THINKING IS THE FAST FORWARD SPEED MAY
LIMIT RAINFALL AMOUNTS. IN SHORT...WILL HOLD OFF ON ISSUING ANY FFA
FOR NOW.  HOWEVER...GIVEN LOWER FFG VALUES ACROSS PARTS OF NE
OK...IT BEARS CONSIDERATION WITH THE 12Z MODEL RUN. COMPLEX BEGINS
WEAKENS AS IT DROPS INTO SOUTHEAST OK/SW AR LATE TONIGHT. A SURFACE
BOUNDARY WILL ALSO ENTER THE REGION BEHIND THE MCS AND WILL SLOW OR
STALL ACROSS SE OK OR NRN TX MONDAY AND MONDAY NIGHT. THIS
BOUNDARY...COMBINED WITH A 30 KNOT LOW LEVEL JET NOSING INTO SW
OKLAHOMA WILL SET THE STAGE FOR ADDITIONAL CONVECTION. PERSISTENT NW
UPPER FLOW TO CONTINUE INTO THE END OF THE WEEK. THIS AND ANY
LINGERING SURFACE BOUNDARIES WILL MAINTAIN THUNDERSTORM CHANCES
THROUGH MOST OF THE EXTENDED. FINALLY... THE UPPER RIDGE BUILDS
NORTH BEGINNING AT THE END OF THE WORK OR EARLY NEXT WEEKEND...SO
WILL KEEP DRY. TEMPWISE...WILL LIKELY ERR ON THE COOL SIDE OF MOS
FOR JUST ABOUT ALL PERIODS AS RAIN COOLED AIR AND CLOUD COVER WILL
HOLD TEMPS IN CHECK.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   93  68  86  64 /  20  50  30  50
FSM   95  69  91  66 /   0  60  30  40
MLC   95  70  91  68 /   0  20  20  50
BVO   93  67  85  63 /  20  60  30  50
FYV   91  65  84  61 /  10  80  30  40
BYV   91  64  84  60 /  10  80  30  30
MKO   93  70  88  65 /   0  50  30  50
MIO   92  65  85  61 /  20  80  30  40
F10   94  70  88  66 /   0  40  30  50
HHW   96  72  94  71 /   0  20  20  40

&&

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

SHORT TERM...18
LONG TERM....23

In the hours before

Special weather statement, Jun 15, 4:46 AM CDT, 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
446 AM CDT SUN JUN 15 2008

OKZ054>056-151030-
NOWATA OK-OSAGE OK-WASHINGTON OK-
446 AM CDT SUN JUN 15 2008

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 530 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     NORTHWESTERN NOWATA...WASHINGTON AND NORTHEASTERN OSAGE

AT 446 AM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES
SOUTH OF HULAH...MOVING EAST AT 30 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...WANN...HULAH...DEWEY AND COPAN.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
40 MPH.

LAT...LON 3699 9571 3675 9565 3681 9612 3699 9609
TIME...MOT...LOC 0946Z 276DEG 20KT 3689 9599

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 12:13 AM CDT	River Flood Warning	TSA	Ottawa	26 hr
Jun 15, 4:46 AM CDT	Special Weather Statement	TSA	Washington	44 min
Jun 15, 5:03 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	42 min
Jun 15, 5:48 AM CDT	Special Weather Statement	TSA	Nowata	42 min
Jun 15, 6:17 AM CDT	Special Weather Statement	TSA	Rogers	43 min
Jun 15, 6:18 AM CDT	Special Weather Statement	TSA	Mayes	42 min
Jun 15, 6:33 AM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers	57 min
Jun 15, 6:41 AM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Wagoner	50 min
Jun 15, 7:06 AM CDT	Special Weather Statement	TSA	Delaware	39 min
Jun 15, 7:07 AM CDT	Special Weather Statement	TSA	Craig	38 min
Jun 15, 7:22 AM CDT	Special Weather Statement	TSA	Cherokee	53 min
Jun 15, 7:43 AM CDT	Special Weather Statement	TSA	Mayes	62 min
Jun 15, 7:48 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes	57 min
Jun 15, 7:52 AM CDT	Special Weather Statement	TSA	Adair, Cherokee	53 min
Jun 15, 8:22 AM CDT	Severe Thunderstorm Warning	TSA	Adair	23 min
Jun 15, 8:59 AM CDT	Special Weather Statement	TSA	Sequoyah	46 min
Jun 15, 9:23 AM CDT	Special Weather Statement	TSA	Sequoyah	52 min
Jun 15, 9:36 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	39 min
Jun 15, 12:19 PM CDT	Flash Flood Watch	TSA	Adair, Cherokee, Craig, Creek, Delaware, Mayes and 9 more	28 hr
Jun 15, 2:39 PM CDT	River Flood Warning	TSA	Nowata	18 hr
Jun 15, 5:57 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	63 min
Jun 15, 6:39 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	67 min
Jun 15, 6:58 PM CDT	Flash Flood Warning	TSA	Ottawa	6 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2008 Every severe thunderstorm warning in 2008

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.