Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 235, NWS Norman, OK

May 5, 2000Atoka County, Coal County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 5, 2000, 4:23 PM CDT for Atoka County, Coal County, Oklahoma. It was in force for 52 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, 4:23 PM CDT (21:23 UTC)
Expired: May 5, 2000, 5:15 PM CDT
In force: 52 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Atoka County, OK, Coal County, OK

What was reported inside it

Time	Report	Where	Remark
May 5, 4:38 PM CDT	Hail 1.75	Cairo, OK

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, 9.4 hours before the alert went out and 147 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 052125
SVROKC
OKC005-029-052215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
423 PM CDT FRI MAY 5 2000

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ATOKA COUNTY IN SOUTHEAST OKLAHOMA
  EASTERN COAL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 515 PM CDT

* AT 423 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7
  MILES WEST OF CHOCKIE...MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE CHOCKIE AND STRINGTOWN

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

LAT...LON 3466 9611 3450 9621 3430 9591 3453 9578

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 May 5, 2:55 PM CDT, 1 hour 28 minutes earlier.

Area forecast discussion, May 5, 2:55 PM CDT, 1 hour 28 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
255 PM CDT FRI MAY 5 2000

WARM AIR ADVECTION HELPED TO GENERATE CONVECTION OVERNIGHT...
DESPITE ONLY 15 TO 25 KNOTS OF 850 MB FLOW.  TONIGHT SHOULD BE AN
EVEN BETTER CHANCE GIVEN THE FORECAST 50 KNOT LOW LEVEL JET AND
STRONGER WARM AIR ADVECTION.  I AM STILL ON THE FENCE AS FAR AS
EXPECTED AREAL COVERAGE AND STILL MAY INCREASE FIRST PERIOD POPS.
WITH SOUTHEASTERLY SURFACE FLOW AND THE MOISTURE NOT GOING
ANYWHERE... MAY HAVE SOME AREAS OF FOG AGAIN IN THE MORNING.

STORMS WILL LIKELY BE CONTINUING AT THE BEGINNING OF THE SECOND
PERIOD.  HOWEVER CAPPING INVERSION SHOULD BE INCREASING FROM WEST TO
EAST ACROSS THE AREA DURING THE DAY REDUCING CHANCES OF CONTINUING
STORMS.  ONE AREA TO WATCH WILL BE IN NORTHWEST OKLAHOMA CLOSER TO
THE DRYLINE THAT SHOULD COME OUT INTO THE EASTERN PANHANDLES
TOMORROW.  AT THE MOMENT THINK THAT CHANCES ARE SMALL ENOUGH TO NOT
INCLUDE POPS THERE AT THIS TIME.

THERE WILL BE A BIT OF A BREAK AS PESKY UPPER LOW FINALLY FILLS AND
MOVES EAST AND AS CAPPING INVERSION INCREASES OVER THE AREA.  SUNDAY
SHOULD BE A RATHER WARM DAY.  NEXT GOOD CHANCE OF RAIN COMES
DEVELOPS ON MONDAY AND TUESDAY AS NEXT UPPER SYSTEM APPROACHES THE
PLAINS AND A COLD FRONT IS ALSO SCHEDULED TO MOVE THROUGH THE AREA
ON MONDAY NIGHT AND TUESDAY.  THE MRF AND CANADIAN ARE PRETTY
CONSISTENT IN THE TIMING OF THIS SYSTEM EARLY NEXT WEEK.

.26.
OKC   62  81  63  85 /  40  30  10  10
HBR   63  84  63  86 /  30  20  10  10
SPS   65  84  65  87 /  30  20  10  10
GAG   62  87  60  87 /  20  10  10  10
PNC   62  79  63  83 /  40  30  10  20
DUA   64  77  65  83 / | 50  30  10  10

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

In the hours before

Local storm report, May 5, 11:46 AM CDT, 4 hours 37 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1146 AM CDT FRI MAY 05 2000

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

1144 AM    1N LONE GROVE             OK   1.75 INCH HAIL
05/05/00   CARTER                         GOLF BALL SIZE
                                          VIA HAM RADIO

DW

Local storm report, May 5, 11:51 AM CDT, 4 hours 32 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1151 AM CDT FRI MAY 05 2000

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

1140 AM    2_NE LONE GROVE            OK   1.00 INCH HAIL
05/05/00   CARTER                          QUARTER SIZE
                                           VIA COUNTY EMS

DW

Special weather statement, May 5, 12:30 PM CDT, 3 hours 53 minutes before

OKZ004>048-050>052-TXZ083>090-031900-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1230 PM CDT THU MAY 5 2000

THE THUNDERSTORM OUTLOOK CALLS FOR A SLIGHT RISK OF SEVERE
THUNDERSTORMS THIS AFTERNOON AND TONIGHT ACROSS WESTERN NORTH
TEXAS AND MUCH OF THE SOUTHERN THIRD OF OKLAHOMA. THE RISK AREA IS
SOUTH OF A LINE FROM VERNON TO LAWTON TO ADA.

DISCUSSION...ONGOING OCCASIONAL SEVERE IN SOUTH CENTRAL OKLAHOMA HAS
BEEN FORMING NORTHEAST OF A FRONT ABOVE THE SURFACE OVER NORTH
TEXAS. INCREASING MOISTURE IN THE BOUNDARY LAYER THROUGH THE DAY AND
THE PERSISTENCE OF THE TEMPERATURE GRADIENT ABOVE THE SURFACE WILL SHOULD
ALLOW MORE STORMS TO FORM THROUGH THE AFTERNOON IN THE RELATIVELY
COOL SURFACE AIRMASS NEAR THE RED RIVER.

TONIGHT THIS FRONT ALOFT WILL MOVE SLOWLY NORTHEAST ALONG WITH
INCREASING BOUNDARY LAYER MOISTURE. ADDITIONALLY A MODERATE
LOW-LEVEL JET WILL SET UP ACROSS NORTH TEXAS AND SOUTHWEST OKLAHOMA
WHICH WILL PROVIDE INCREASED WIND SHEAR FAVORABLE FOR SEVERE STORMS.
AREAS OF SOUTHERN OKLAHOMA FARTHER AWAY FROM THE RED RIVER WILL HAVE
AN INCREASING CHANCE OF SEVERE STORMS TONIGHT.

INCREASING TEMPERATURES IN THE MID-LEVELS OF THE ATMOSPHERE ARE
EXPECTED TO MOVE INTO PART OF WESTERN NORTH TEXAS AND AND SOUTHWEST
OKLAHOMA LATE TONIGHT DIMINISHING THE POSSIBILITY OF SEVERE STORMS
THERE.

EMERGENCY MANAGERS IN THE OUTLOOK AREA SHOULD PREPARE FOR POSSIBLE E
SEVERE WEATHER ACTIVATION THIS AFTERNOON THROUGH TONIGHT.

WR

Local storm report, May 5, 1:58 PM CDT, 2 hours 25 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
158 PM CDT FRI MAY 05 2000

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

0152 PM    5W ADA                    OK   1.75 INCH HAIL
05/05/00   PONTOTOC                       PICKETT REPORTED
                                          BY PUBLIC

DW

Local storm report, May 5, 2:11 PM CDT, 2 hours 12 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
211 PM CDT FRI MAY 05 2000

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

0205 PM    8N CENTRAHOMA             OK   1.25 INCH HAIL
05/05/00   COAL                           HALF DOLLAR HAIL
                                          REPORTED BY SPOTTER

DW

Local storm report, May 5, 2:55 PM CDT, 1 hour 28 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
255 PM CDT FRI MAY 05 2000

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

0250 PM    2S BYNG                   OK   .88 INCH HAIL
05/05/00   PONTOTOC                        PEA TO NICKEL SIZE
                                           REPORTED BY PUBLIC

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, 10:55 AM CDT	Severe Thunderstorm Warning	OUN	Jefferson	50 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

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.