Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 177, NWS Tulsa, OK

August 4, 2012Craig County, Nowata County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 4, 2012, 6:06 PM CDT for Craig County, Nowata County, Oklahoma. It was in force for 26 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
Aug 4, 2012, 6:06 PM CDT (23:06 UTC)
Expired
Aug 4, 2012, 6:32 PM CDT
In force
26 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Craig County, OK, Nowata County, OK

The radar

The Tulsa radar (KINX), 83 km from the middle of the area, began a volume at 23:08 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

TimeReportWhereRemark
Aug 4, 6:15 PM CDTTSTM WND DMG8 W Hollow, OKTREE DAMAGE. LARGE LIMBS BROKEN.

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

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.1 hours before the alert went out and 131 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2012-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 917 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2012-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
917 J/kg
Mixed-layer CIN
-319 J/kg
Mixed-layer LCL
1875 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

478 
WUUS54 KTSA 042306
SVRTSA
OKC035-105-050000-
/O.NEW.KTSA.SV.W.0177.120804T2306Z-120805T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
606 PM CDT SAT AUG 4 2012

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CRAIG COUNTY IN NORTHEAST OKLAHOMA
  EASTERN NOWATA COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 700 PM CDT

* AT 604 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 10 MILES WEST OF
  HOLLOW...MOVING EAST AT 20 MPH.

  STORM HAZARDS INCLUDE...
  PENNY SIZE HAIL...
  DAMAGING WIND GUSTS TO 70 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...HOLLOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3684 9513 3684 9547 3691 9548 3701 9517
TIME...MOT...LOC 2306Z 252DEG 15KT 3688 9544

$$
2 follow-up statements
717 
WWUS54 KTSA 042323
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
623 PM CDT SAT AUG 4 2012

OKC105-042333-
/O.CAN.KTSA.SV.W.0177.000000T0000Z-120805T0000Z/
NOWATA OK-
623 PM CDT SAT AUG 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN NOWATA COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS MOVED EAST. 

LAT...LON 3684 9540 3692 9541 3701 9517 3684 9513
TIME...MOT...LOC 2323Z 254DEG 21KT 3690 9533

$$

OKC035-050000-
/O.CON.KTSA.SV.W.0177.000000T0000Z-120805T0000Z/
CRAIG OK-
623 PM CDT SAT AUG 4 2012

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
NORTHWESTERN CRAIG COUNTY...

AT 621 PM CDT...A LARGE SEVERE THUNDERSTORM WAS LOCATED NEAR 
HOLLOW...MOVING EAST AT 25 MPH.

STORM HAZARDS INCLUDE...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...HOLLOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3684 9540 3692 9541 3701 9517 3684 9513
TIME...MOT...LOC 2323Z 254DEG 21KT 3690 9533

$$
302 
WWUS54 KTSA 042332
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
632 PM CDT SAT AUG 4 2012

OKC035-042341-
/O.CAN.KTSA.SV.W.0177.000000T0000Z-120805T0000Z/
CRAIG OK-
632 PM CDT SAT AUG 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CRAIG COUNTY IS
CANCELLED...

THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS...THEREFORE THE
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

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

OTHER STRONG THUNDERSTORMS WERE LOCATED OVER WEST CENTRAL PORTIONS 
OF CRAIG COUNTY AND COULD PRODUCE WIND GUSTS OF 40 TO 50 MPH. 

LAT...LON 3684 9540 3692 9541 3701 9517 3684 9513
TIME...MOT...LOC 2331Z 254DEG 21KT 3691 9527

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 1:09 AM CDTRed Flag WarningTSACherokee, Craig, Creek, Delaware, Haskell, McIntosh and 11 more22 hr
Aug 4, 5:20 PM CDTSpecial Weather StatementTSACraig25 min
Aug 4, 5:29 PM CDTSpecial Weather StatementTSANowata31 min
Aug 4, 5:37 PM CDTSpecial Weather StatementTSAOttawa23 min
Aug 4, 5:46 PM CDTSevere Thunderstorm WarningTSAOttawa28 min
Aug 4, 5:55 PM CDTSpecial Weather StatementTSACraig35 min
Aug 4, 6:26 PM CDTSpecial Weather StatementTSANowata34 min
Aug 4, 6:29 PM CDTSpecial Weather StatementTSACraig31 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2012Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.