Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

April 9, 2012Osage County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 9, 2012, 9:41 PM CDT for Osage County, Oklahoma. It was in force for 49 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 9, 2012, 9:41 PM CDT (02:41 UTC)
Expired
Apr 9, 2012, 10:30 PM CDT
In force
49 min
Issued by
NWS Tulsa, OK

County Osage County, OK

The radar

The Tulsa radar (KINX), 81 km from the middle of the area, began a volume at 02:41 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 nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 2.7 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-pSkew-T log-p diagram, Lamont, OK at 00:00Z on 2012-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 944 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lamont, OK at 00:00Z on 2012-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939587897Sfc1 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
944 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
945 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 9, 8:59 PM CDT, 42 minutes earlier.

Area forecast discussion, Apr 9, 8:59 PM CDT, 42 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
859 PM CDT MON APR 9 2012

...UPDATE...

.DISCUSSION...
ISOLATED SEVERE THUNDERSTORMS...WITH A HISTORY OF
PRODUCING LARGE HAIL...CONTINUES ALONG THE NRN EDGE
OF THE INSTABILITY AXIS ACROSS PARTS OF NE OK. THIS
ACTIVITY WILL LIKELY PERSIST FOR A FEW MORE HOURS
AND HAVE ALREADY SENT UPDATED PRODUCTS TO UP POPS
ACROSS THE NRN SECTIONS.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   58  74  50  66 /  40  40  40  20
FSM   57  75  52  67 /  20  40  30  30
MLC   59  74  54  66 /  20  30  30  30
BVO   54  73  47  65 /  60  40  40  20
FYV   51  71  48  65 /  30  40  40  20
BYV   50  71  45  65 /  40  40  40  20
MKO   59  75  51  67 /  30  40  40  30
MIO   51  73  45  65 /  70  40  40  20
F10   58  74  53  67 /  30  40  40  30
HHW   60  75  57  69 /  20  20  20  30

&&

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

SHORT TERM...21
LONG TERM....18
Hazardous weather outlook, Apr 9, 9:35 PM CDT, 6 minutes before
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In the hours before

Local storm report, Apr 9, 8:11 PM CDT, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
811 PM CDT MON APR 09 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0808 PM     HAIL             9 NNW BIGHEART          36.97N 96.31W
04/09/2012  E1.00 INCH       OSAGE              OK   TRAINED SPOTTER

            MARBLE TO QUARTER SIZE HAIL COVERING THE GROUND.

&&

GEW
Local storm report, Apr 9, 8:53 PM CDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE
853 PM CDT MON APR 09 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0840 PM     HAIL             4 NW OKESA              36.75N 96.18W
04/09/2012  E2.00 INCH       OSAGE              OK   CO-OP OBSERVER

            NINE MILES DUE WEST OF BARTLESVILLE.

&&

GEW
Local storm report, Apr 9, 9:32 PM CDT, 9 minutes before
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Special weather statement, Apr 9, 9:41 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 7:45 PM CDTSevere Thunderstorm WarningTSAOsage60 min
Apr 9, 8:22 PM CDTSevere Thunderstorm WarningTSAOsage53 min
Apr 9, 8:51 PM CDTSevere Thunderstorm WarningTSAOsage54 min
Apr 9, 9:03 PM CDTSevere Thunderstorm WarningTSACraig, Nowata57 min
Apr 9, 9:04 PM CDTSevere Thunderstorm WarningTSAOsage, Rogers, Washington41 min
Apr 9, 9:30 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa, Washington45 min
Apr 9, 9:56 PM CDTSpecial Weather StatementTSAOttawa49 min
Apr 10, 4:54 AM CDTSpecial Weather StatementTSACarroll36 min

Nearby

Special Weather Statements in Oklahoma, 2012Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.