Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 153, NWS Shreveport, LA

April 23, 2000McCurtain County, Oklahoma

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 23, 2000, 2:17 PM CDT for McCurtain County, Oklahoma. It was in force for 58 min. 4 reports 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: Apr 23, 2000, 2:17 PM CDT (19:17 UTC)
Expired: Apr 23, 2000, 3:15 PM CDT
In force: 58 min
Issued by: NWS Shreveport, LA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County McCurtain County, OK

What was reported inside it

Time	Report	Where	Remark
Apr 23, 2:25 PM CDT	Hail 0.75	Wright City, OK
Apr 23, 2:28 PM CDT	Hail 1	Wright City, OK
Apr 23, 2:44 PM CDT	Hail 1.75	Wright City, OK
Apr 23, 3:08 PM CDT	Tornado F2	Wright City, OK	Numerous trees toppled and broken. Tornado was described as rope like by chasers in the area during most of its path. A house on the south side of Oak Hill was split in half from a fallen tree. The tornado moved through downtown Broken Bow and through a Wal

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 23, 1:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 7.3 hours before the alert went out and 218 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 271 m²/s²
0-3 km storm-relative helicity: 416 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

545 
WUUS54 KSHV 231920
SVRSHV
OKC089-232015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
217 PM CDT SUN APR 23 2000

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN MCCURTAIN COUNTY IN OKLAHOMA

* UNTIL 315 PM CDT

* AT 217 PM CDT...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTH OF             
  VALLIANT OR NEAR WRIGHT CITY...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   GLOVER AT 235 PM CDT

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH
LITTLE OR NO ADVANCE WARNING.

THIS THUNDERSTORM WILL PRODUCE LARGE HAIL AND STRONG DAMAGING WINDS.
DO NOT REMAIN OUTSIDE...THIS IS A DANGEROUS WEATHER SITUATION.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE
THUNDERSTORM WARNING FOR...
  WESTERN MCCURTAIN COUNTY IN OKLAHOMA
UNTIL 315 PM CDT.

LAT...LON 3407 9522 3394 9507 3418 9473 3434 9492

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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 10:00 AM CDT, 4 hours 17 minutes earlier.

Area forecast discussion, Apr 23, 10:00 AM CDT, 4 hours 17 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
1000 AM CDT SUN APR 23 2000

AWAITING MAIN EVENT WHILE THE UNDERCARD PLAYS OUT. THIS FIRST BATCH
WITH TAIL END NEAR NATCHITOCHES RIGHT NOW WILL LEAVE AND GIVE US A
REST BEFORE THE MAIN EVENT. MAY BE A LENGTHY EVENT...DEPENDS ON
TIMING AND PLACEMENT OF FIRST DEVELOPMENT. FRONT/DRYLINE WILL BE IN
CWA THROUGH LATE NIGHT. DRYLINE NOW STILL WEST OF DFW/ACT/AUS. STILL
SORTA EXPECTING LOW CLOUDS TO SCATTER OUT AND PROVIDE US WITH SOLAR
HEATING IN OUR CWA...SOMEWHERE.

WILL UPDATE ZONES AS NEEDED BY 1130 AM TO ADJUST FOR TRENDS...BUT
LITTLE SUBSTANTIVE CHANGES FORESEEN. SPC REQUESTS 18Z SOUNDING AND
WE GLADLY OBLIGE.  17

.SHV...NONE.

In the hours before

Special weather statement, Apr 23, 9:30 AM CDT, 4 hours 47 minutes before

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096-
097-108>112-124>126-136>138-149>153-165>167-231630-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
930 AM CDT SUN APR 23 2000

...RISK OF SEVERE THUNDERSTORMS...AND POSSIBLY TORNADOES...ACROSS
   THE FOUR STATE REGION TODAY AND TONIGHT...

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS OVER SOUTHEAST
OKLAHOMA...SOUTHERN ARKANSAS...AND THOSE PORTIONS OF NORTHEAST TEXAS
AND NORTHERN LOUISIANA ALONG AND NORTH OF INTERSTATE 20. THERE IS A
SLIGHT RISK OF SEVERE THUNDERSTORMS SOUTH OF INTERSTATE 20.

A STRONG UPPER LEVEL SYSTEM AND AN ASSOCIATED SURFACE FRONT WILL
MOVE INTO SOUTHEAST OKLAHOMA AND NORTHEAST TEXAS LATER THIS
AFTERNOON...AND INTO ARKANSAS AND LOUISIANA TONIGHT. THESE FEATURES
WILL ACT UPON WARM...MOIST AND UNSTABLE GULF AIR WHICH IS FLOWING
INTO THE REGION AHEAD OF THE FRONT...TRIGGERING STRONG TO SEVERE
THUNDERSTORMS ACROSS THE AREA. LARGE HAIL AND STRONG WINDS ARE
LIKELY WITH THE STRONGEST STORMS. FURTHERMORE...WIND SHEAR PATTERNS
IN THE LOWER TO MIDDLE TROPOSPHERE WILL PROMOTE THE DEVELOPMENT OF
LONG LIVED SUPERCELLS WHICH COULD PRODUCE TORNADOES.

ISOLATED THUNDERSTORMS WILL ALSO BE POSSIBLE DURING THE DAY AND
EVENING WELL TO THE EAST OF THE PRIMARY ACTIVITY.

ALL PERSONS ACROSS THE FOUR STATE REGION SHOULD STAY ABREAST OF
WEATHER CONDITIONS TODAY...AND BE PREPARED TO TAKE ACTION SHOULD
SEVERE WEATHER THREATEN.

THE ACTIVATION OF SEVERE THUNDERSTORM SPOTTERS...EMERGENCY MANAGEMENT
PERSONNEL...HAM RADIO OPERATORS...AND SKYWARN NETWORKS WILL LIKELY BE
REQUIRED TODAY AND TONIGHT.

Local storm report, Apr 23, 10:45 AM CDT, 3 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1045 AM CDT SUN APR 23 2000

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0820 AM    1 W LUFKIN                TX   .75 INCH HAIL
04/23/00   ANGELINA                       DIME SIZED HAIL FELL AT INTERSECTION
                                          OF LOOP 287 AND SH 3150
                                          REPORT FROM LAW ENFORCEMENT

0900 AM    18 SE CENTER              TX   .75 INCH HAIL
04/23/00   SHELBY                         DIME SIZED HAIL FELL ALONG SH 87 S
                                          IN THE PATROON COMMUNITY
                                          REPORT FROM HAM RADIO OPERATOR

0915 AM    10 SW ZWOLLE              LA   .75 INCH HAIL
04/23/00   SABINE                         DIME SIZED HAIL FELL ALONG SH 1215
                                          REPORT FROM HAM RADIO OPERATOR

0920 AM    ZWOLLE                    LA   .75 INCH HAIL
04/23/00   SABINE                         REPORT FROM CIVIL AIR PATROL
                                          VIA NWS LAKE CHARLES

0955 AM    1 E FLORA                 LA   .88 INCH HAIL
04/23/00   NATCHITOCHES                   NICKEL SIZED HAIL FELL FOR 5 MINUTES
                                          AND COVERED THE GROUND
                                          REPORT FROM COOPERATIVE OBSERVER

1000 AM    4 S NATCHITOCHES          LA   .88 INCH HAIL
04/23/00   NATCHITOCHES                   NICKEL SIZED HAIL FELL ALONG I-49
                                          REPORT FROM LAW ENFORCEMENT

1005 AM    MONTGOMERY                LA   1.75 INCH HAIL
04/23/00   GRANT                          REPORT FROM LAW ENFORCEMENT

1030 AM    POLLOCK                   LA   .75 INCH HAIL
04/23/00   GRANT                          REPORT FROM LAW ENFORCEMENT

15

Local storm report, Apr 23, 10:55 AM CDT, 3 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1055 AM CDT SUN APR 23 2000

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0855 AM    1 E SAN AUGUSTINE         TX   .75 INCH HAIL
04/23/00   SAN AUGUSTINE                  DIME SIZED HAIL FELL ALONG SH 21
                                          REPORT FROM LAW ENFORCEMENT

15

Local storm report, Apr 23, 11:40 AM CDT, 2 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1140 AM CDT SUN APR 23 2000

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

1040 AM    4 SE TULLOS               LA   1.75 INCH HAIL
04/23/00   LA SALLE                       GOLF BALL SIZED HAIL FELL
                                          ALONG SH 84
                                          REPORT FROM LAW ENFORCEMENT

15

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 23, 2:42 PM CDT	Tornado Warning	SHV	McCurtain	48 min
Apr 23, 3:43 PM CDT	Tornado Warning	SHV	McCurtain	62 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.