Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 735, NWS Norman, OK

June 19, 2008Knox County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Jun 19, 2008, 7:57 PM CDT for Knox County, Texas. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 19, 2008, 7:57 PM CDT (00:57 UTC)
Expired
Jun 19, 2008, 8:45 PM CDT
In force
48 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

County Knox County, TX

The radar

The Altus AFB radar (KFDR), 110 km from the middle of the area, began a volume at 00:57 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.

IssuedProductOfficeLasted
Jun 19, 4:40 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.0 hours before the alert went out and 244 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, Fort Worth, TX at 00:00Z on 2008-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1093 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, Fort Worth, TX at 00:00Z on 2008-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
1093 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
1446 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 19, 3:28 PM CDT, 4 hours 29 minutes earlier.

Area forecast discussion, Jun 19, 3:28 PM CDT, 4 hours 29 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
328 PM CDT THU JUN 19 2008

.DISCUSSION...
YET ANOTHER IN A SEEMINGLY ENDLESS SERIES OF STORM COMPLEXES HAS
DEVELOPED OVER SOUTHERN KANSAS AND NORTHERN OKLAHOMA THIS
AFTERNOON. SATELLITE INDICATIONS SUGGEST THAT THE NEXT MCS IS IN
ITS EARLY DEVELOPMENT STAGES OVER COLORADO AND NEW MEXICO. WE
EXPECT THE FIRST MCS TO BRING RAIN TO MUCH OF OUR FORECAST AREA...
WITH THE PROBABLE EXCEPTION OF OUR FAR SOUTHWEST COUNTIES IN
TEXAS... AND A FEW OF THE ASSOCIATED STORMS MAY BE SEVERE. THE
SECOND MCS IS LIKELY TO MOVE INTO OKLAHOMA AND... LATER... NORTH
TEXAS... LATE THIS EVENING AND OVERNIGHT. BETWEEN THE TWO
EVENTS... RATHER HEAVY RAINFALL TOTALS WILL BE LIKELY FOR FAVORED
LOCATIONS. SINCE IT APPEARS THAT THE HEAVIEST RAINFALL WITH THE
FIRST MCS WILL BE FARTHER NORTHEAST THAN THAT OF THE SECOND...
WILL HOLD OFF ON ANY HYDROLOGICAL WATCHES FOR NOW.

THE UPPER FLOW DOES NOT REALLY CHANGE ALL THAT MUCH OVER THE NEXT
WEEK... ALTHOUGH THERE WILL BE SUBTLE SHIFTS IN FAVORED AREAS AND
TIMES OF MCS ACTIVITY. IN GENERAL... HAVE LEFT IT UP TO THE
STANDARD GFS INITIALIZATION TO HIGHLIGHT THE RAIN PATTERNS OF THE
NEXT WEEK... AFTER TONIGHT.

THE ZONE FORECAST WILL INCLUDE A PRE-FIRST PERIOD TO DEAL WITH THE
DETAILS OF THE CURRENT SITUATION.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  67  88  67  89 /  70  20  10   0
HOBART OK         67  92  67  91 /  70  20  20  10
WICHITA FALLS TX  68  90  69  92 /  70  20  10  10
GAGE OK           62  90  60  89 /  70  20  30  10
PONCA CITY OK     66  87  64  88 /  60  20  10   0
DURANT OK         69  86  68  87 /  70  40  10   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&

26/23
Hazardous weather outlook, Jun 19, 6:28 PM CDT, 1 hour 29 minutes before
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In the hours before

Special weather statement, Jun 19, 1:58 PM CDT, 5 hours 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
158 PM CDT THU JUN 19 2008

OKZ006-191915-
ALFALFA OK-
158 PM CDT THU JUN 19 2008

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR ALFALFA COUNTY.

A STRONG THUNDERSTORM WAS LOCATED OVER CHEROKEE AT 158 PM CDT...
MOVING EAST AT 25 MPH.

SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.

PEOPLE IN ALFALFA COUNTY SHOULD MONITOR THE WEATHER SITUATION
CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER
CONDITIONS.

..SPEG.
Special weather statement, Jun 19, 3:35 PM CDT, 4 hours 22 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
335 PM CDT THU JUN 19 2008

OKZ008-192100-
KAY OK-
335 PM CDT THU JUN 19 2008

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR KAY COUNTY.

A STRONG THUNDERSTORM WAS LOCATED OVER BRAMAN AT 335 PM CDT...MOVING
EAST AT 23 MPH.  PECKHAM AND NEWKIRK ARE IN THE PATH OF THIS STORM.

SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.
Special weather statement, Jun 19, 5:37 PM CDT, 2 hours 20 minutes before
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Special weather statement, Jun 19, 7:11 PM CDT, 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
711 PM CDT THU JUN 19 2008

OKZ027-200030-
GRADY OK-
711 PM CDT THU JUN 19 2008

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR GRADY COUNTY.

A STRONG THUNDERSTORM WAS LOCATED 4 MILES WEST OF BRIDGE CREEK... AT
711 PM. ANOTHER STORM WAS LOCATED 5 MILES EAST OF CHICKASHA.  THE
STORMS WERE MOVING SOUTHEAST AT 23 MPH. SMALL HAIL...HEAVY RAIN AND
CLOUD TO GROUND LIGHTNING ARE LIKELY WITH THESE STORMS. THE STORMS
WERE DEVELOPING NEAR A WIND SHIFT LINE LOCATED NEAR INTERSTATE 44
FROM SOUTHEAST OKLAHOMA CITY TO CHICKASHA. AS THE WIND SHIFT LINE
CONTINUES TO ALSO MOVE SOUTHEAST... A FEW MORE STORMS MAY DEVELOP IN
ITS VICINITY.

CJS
Local storm report, Jun 19, 7:35 PM CDT, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
735 PM CDT THU JUN 19 2008

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

0735 PM     HAIL             5 W BENJAMIN            33.58N 99.88W
06/19/2008  E1.75 INCH       KNOX               TX   PUBLIC

&&

JPIKE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 1:23 PM CDTSevere Thunderstorm WarningOUNAtoka, Bryan52 min
Jun 19, 7:22 PM CDTSevere Thunderstorm WarningOUNKnox38 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008Every 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.