Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 417, NWS Norman, OK

August 7, 2000Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 7, 2000, 5:36 PM CDT for Woodward County, Oklahoma. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Aug 7, 2000, 5:36 PM CDT (22:36 UTC)
Expired: Aug 7, 2000, 6:15 PM CDT
In force: 39 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Woodward County, OK

What was reported inside it

Time	Report	Where	Remark
Aug 7, 5:40 PM CDT	Thunderstorm Wind 50 M	Woodward, OK	Wind gust was measured by the Oklahoma mesonet.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 10.6 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: 1567 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1632 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOUN 072236
SVROKC
OKC153-072315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
536 PM CDT MON AUG 7 2000

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WOODWARD COUNTY IN NORTHWEST OKLAHOMA

* UNTIL 615 PM CDT

* AT 536 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5
  MILES NORTH OF WOODWARD...MOVING NORTHEAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE ALABASTER CAVERNS STATE PARK AND
  WOODWARD

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS TO AT LEAST 70 MPH ARE 
LIKELY.

LAT...LON 3652 9956 3637 9944 3655 9900 3676 9916
          3660 9929

DLF

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 Aug 7, 3:30 PM CDT, 2 hours 6 minutes earlier.

Area forecast discussion, Aug 7, 3:30 PM CDT, 2 hours 6 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
330 PM CDT MON AUG 7 2000

SHEAR AXIS ALOFT FROM E NEW MEXICO INTO NW OKLAHOMA AND ASSOC
MID-HIGH LEVEL MOISTURE WILL SPELL THE NEED TO KEEP POPS GOING
ACROSS WESTERN AND NORTHERN OK THROUGH TOMORROW NIGHT.  DECENT
STORMS NOW DEVELOPING ACROSS NW OKLAHOMA HAVE GOOD CORES ALOFT AND A
FEW WILL BE SEVERE INTO EARLY THIS EVENING WITH STRONG WINDS THE
MAIN THREAT DUE TO HIGH T-TD SPREADS. MODERATE HAIL WILL ALSO BE A
POSSIBILITY FOR A FEW MORE HOURS UNTIL HEATING IS LOST AND EXPECT
ACTIVITY TO RAPIDLY DIMINISH IN INTENSITY AFTER 7 PM. FOW NOW WILL
KEEP CENTRAL.. SOUTHERN AND SOUTHEASTERN ZONES DRY TONIGHT.

LITTLE CHANGE SEEN FOR TUESDAY WITH CONTINUED HOT AND DRY SOUTH AND
EAST WHILE THE NORTH AND WEST REMAINS UNDER THE INFLUENCE OF THE
WEAKENING SHEAR AXIS ALOFT. WILL HOLD POPS INTO TUES NIGHT THEN DROP.
WEDNESDAY LOOKS DRY AND HOT.

SOME UNCERTAINTIES EXIST IN THE EXTENDED PERIOD WITH THE MRF BEING
THE MOST VIGOROUS IN BRINGING DOWN A COOL FRONT AND ASSOC PRECIP.
UKMET/ECMWF ALSO BRING DOWN A SURFACE BOUNDARY BUT DO NOT APPEAR AS
STRONG AT THE SURFACE NOR ALOFT WITH THE STRENGTH OF N-NE FLOW. WILL
TREND THE EXTENDED PERIOD TOWARD EASING BACK THE TEMPS A BIT AND
WILL INTRODUCE LOW POPS. HESITATE TO COOL THINGS DOWN TOO MUCH AT
THIS POINT IN THE EVENT THE MRF IS TOO AGGRESSIVE BUT WILL DROP MAX
TEMPS BACK 5-8 DEGREES THIS WEEKEND.

FCSTID = 33/DLF
OKC   74 100  74 100 /  10  10  10  10
HBR   74 102  74 102 /  30  20  20  10
SPS   77 105  77 105 /  10  10  10  10
GAG   72  98  72 100 /  80  30  30  10
PNC   74 101  74 101 /  40  20  20  10
DUA   75 10%0  75 100 /   0   0   0   0

.OUN...
OK...NONE.
TX...NONE.

In the hours before

Local storm report, Aug 7, 4:12 PM CDT, 1 hour 24 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
412 PM CDT MON AUG 07 2000

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    SELMAN                    OK   .88 INCH HAIL
08/07/00   HARPER                         PUBLIC REPORT

KT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 3:28 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woodward	47 min
Aug 7, 4:12 PM CDT	Severe Thunderstorm Warning	OUN	Woods	33 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.