Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 227, NWS Norman, OK

May 5, 2000Jefferson County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 5, 2000, 10:55 AM CDT for Jefferson County, Oklahoma. It was in force for 50 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: May 5, 2000, 10:55 AM CDT (15:55 UTC)
Expired: May 5, 2000, 11:45 AM CDT
In force: 50 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Jefferson County, OK

What was reported inside it

Time	Report	Where	Remark
May 5, 11:05 AM CDT	Hail 1.75	Waurika, OK	Hail was reported on the south side.

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

Norman, OK (KOUN), launched 12:00Z, 3.9 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-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: 299 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 498 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOUN 051556
SVROKC
OKC067-051645-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1055 AM CDT FRI MAY 5 2000

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JEFFERSON COUNTY IN SOUTHERN OKLAHOMA

* UNTIL 1145 AM CDT

* AT 1055 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 
MILES SOUTHEAST OF WAURIKA...MOVING SOUTHEAST AT 20 TO 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE ADDINGTON...GRADY...RYAN...SUGDEN
  AND WAURIKA

HAIL UP TO THE SIZE OF QUARTERS AND WIND GUSTS TO AT LEAST 60 MPH 
ARE LIKELY.

LAT...LON 3427 9796 3416 9814 3391 9791 3402 9767

30

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 May 5, 9:46 AM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, May 5, 9:46 AM CDT, 1 hour 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
946 AM CDT FRI MAY 5 2000

MODERATE WARM ADVECTION FROM SOUTHWEST TEXAS INTO NORTHWEST TEXAS
CONTINUES TO SUSTAIN STORMS. THETA-E ADVECTION FORECAST BY THE RUC
INTO THIS SAME AREA TODAY MAY KEEP WIDELY SCATTERED SHOWERS AND
STORMS FROM ENDING AT ALL TODAY. FORECAST WILL BE ADJUSTED TO
REFLECT THIS TIMING.

VISIBILITIES HAVE INCREASED IN MANY AREAS TO ABOVE DENSE FOG
CRITERIA, SO THE ADVISORY WILL EXPIRE AS PLANNED AT 10 AM. HOWEVER,
IT WILL BE A SLOW TRANSITION TO SOME SUN OVER CENTRAL AND WESTERN OK
AS THE BOUNDARY LAYER IS VERY MOIST AND WINDS ARE VERY LIGHT.
SOUTHEAST OKLAHOMA IS STILL NOT EXPECTED TO SEE SUN TODAY AS A LARGE
CLOUD MASS AROUND THE WEST SIDE OF THE UPPER LOW WILL REMAIN OVER
THAT AREA TODAY.

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

In the hours before

Local storm report, May 5, 9:08 AM CDT, 1 hour 47 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
908 AM CDT FRI MAY 05 2000

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

0905 AM    LAvKE KICKAPOO             TX   1.75 INCH HAIL
05/05/00   ARCHER

DW

Local storm report, May 5, 9:26 AM CDT, 1 hour 29 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
926 AM CDT FRI MAY 05 2000

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

0915 AM    3S*W MANKINS               TX   1.00 INCH HAIL
05/05/00   ARCHER                          VIA EMG MANG

Local storm report, May 5, 9:35 AM CDT, 1 hour 20 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
935 AM CDT FRI MAY 05 2000

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

0922 AM    2SW IOWA PARK             TX   .88 INCH HAIL
05/05/00   WICHITA                         ON HWY 367

Local storm report, May 5, 9:40 AM CDT, 1 hour 15 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
940 AM CDT FRI MAY 05 2000

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

0927 AM    1S MANKINS                TX   .88 INCH HAIL
05/05/00   ARCHER                          VIA EMS/HAMS

Local storm report, May 5, 9:43 AM CDT, 1 hour 12 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
943 AM CDT FRI MAY 05 2000

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

0929 AM    4N KAMAY                  TX   .88 INCH HAIL
05/05/00   WICHITA                         VIA EMS/HAMS

Local storm report, May 5, 10:51 AM CDT, 4 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1051 AM CDT FRI MAY 05 2000

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

1047 AM    3NW BURKBURNETT           TX   1.00 INCH HAIL
05/05/00   WICHITA                         VIA EMS/HAMS

DW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 10:34 AM CDT	Severe Thunderstorm Warning	OUN	Cotton	41 min
May 5, 11:28 AM CDT	Severe Thunderstorm Warning	OUN	Carter	47 min
May 5, 1:45 PM CDT	Severe Thunderstorm Warning	OUN	Pontotoc	45 min
May 5, 2:03 PM CDT	Severe Thunderstorm Warning	OUN	Coal	42 min
May 5, 2:21 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	24 min
May 5, 2:39 PM CDT	Severe Thunderstorm Warning	OUN	Pontotoc	36 min
May 5, 2:44 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	46 min
May 5, 3:11 PM CDT	Severe Thunderstorm Warning	OUN	Seminole	49 min
May 5, 4:23 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	52 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.