Alert archive / Arkansas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 337, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 31, 1999, 6:55 AM CDT for Washington County, Arkansas. It was in force for 50 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 31, 1999, 6:55 AM CDT (11:55 UTC)
- Expired
- May 31, 1999, 7:45 AM CDT
- In force
- 50 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Washington County, AR
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 31, 7:40 AM CDT | Thunderstorm Wind 52 | Odell, AR |
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
Springfield, MO (KSGF), launched 00:00Z, 11.9 hours before the alert went out and 109 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.
- Mixed-layer CAPE
- 346 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 929 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 31, 3:55 AM CDT, 3 hours earlier.
Area forecast discussion, May 31, 3:55 AM CDT, 3 hours before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 355 AM CDT MON MAY 31 1999 PROBLEM(S) OF THE DAY: POPS TEMPERATURES MCS MOVING SOUTHEAST THROUGH KANSAS HAS MERGED WITH LINE OF STORMS MOVING EAST ACROSS KANSAS/OKLAHOMA BORDER. THESE STORMS ARE JUST NOW ENTERING NORTHEAST OKLAHOMA. HAVE STAGGERED POPS FROM LIKELY NORTH TO CHANCE FAR SOUTH THIS MORNING. STORMS ARE MOVING INTO SLIGHTLY MORE STABLE AIR BUT GOOD MOISTURE AVAILABLE. MODELS CONTINUE TO HAVE TROUBLE AS FAR AS SURFACE FEATURES THROUGH 48 HOURS. SEVERAL SURFACE LOWS RIDE NORTHEAST ALONG FRONT OVER TEXAS/OKLAHOMA PANHANDLES UP INTO SOUTHEAST NEBRASKA. EXACT POSITION IS HARD TO PREDICT...BUT APPEARS FRONT WILL SLOWLY PUSH TO THE EAST THIS EVENING. EXPECT MCS TO DEVELOP OVER WESTERN KANSAS LATE THIS EVENING AND MAKE IT INTO CWA SHORTLY AFTER MIDNIGHT JUST AHEAD OF COLD FRONT. WILL LEAVE CHANCE POPS IN EVERYWHERE THIS AFTERNOON... TONIGHT AND TUESDAY WITH SLIGHT CHANCE LINGERING THROUGH EARLY MORNING WEDNESDAY. GUIDANCE TEMPS LOOK CLOSE AND HAVE GONE WITH COMPROMISE. REST OF EXTENDED LOOKS ON TRACK AND WILL MAKE NO CHANGES AT THIS TIME. FCSTID = 33 TUL 88 69 86 66 / 60 50 30 20 FSM 89 68 86 66 / 50 30 30 20 MLC 89 69 87 67 / 50 40 30 20 BVO 87 68 84 65 / 60 50 30 20 FYV 86 66 84 64 / 60 30 30 20 IDB 90 67 87 66 / 30 30 20 20 BYV 86 66 84 64 / 60 30 30 20 MIO 86 67 84 65 / 60 40 30 20 MKO 88 69 86 66 / 60 50 30 20 F10 89 69 87 67 / 60 50 30 20 HHW 90 67 87 66 / 30 30 20 20 .TUL... AR...NONE. OK...NONE. -------------------- EXPERIMENTAL OUTPUT: HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: CHANCE SEVERE THUNDERSTORMS NGM CONFIDENCE: 6 ON A SCALE OF 0 TO 10 ETA CONFIDENCE: 7 ON A SCALE OF 0 TO 10 AVN CONFIDENCE: 7 ON A SCALE OF 0 TO 10 FCST CONFIDENCE: 7 ON A SCALE OF 0 TO 10
In the hours before
Special weather statement, May 31, 6:00 AM CDT, 55 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-011100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT MON MAY 31 1999 A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS TODAY AND TONIGHT. .SYNOPSIS... A CLUSTER OF STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO MOVE SOUTHEAST ACROSS NORTHEAST OKLAHOMA THIS MORNING. A FEW OF THE STORMS THIS MORNING WILL REMAIN STRONG TO SEVERE...MAINLY ACROSS NORTHEAST OKLAHOMA...AS THEY CONTINUE TO MOVE SOUTHEAST. THESE STORMS ARE EXPECTED TO GRADUALLY WEAKEN BY MID TO LATE MORNING AS THEY MOVE INTO A MORE STABLE AIRMASS ACROSS NORTHWEST ARKANSAS AND EXTREME EASTERN OKLAHOMA. AN OUTFLOW BOUNDARY FROM THIS MORNINGS THUNDERSTORMS IS EXPECTED TO BECOME STATIONARY ACROSS NORTHWEST ARKANSAS AND SOUTHEAST OKLAHOMA THIS AFTERNOON. THIS BOUNDARY MAY SERVE AS A FOCUS FOR ADDITIONAL THUNDERSTORM DEVELOPMENT THIS AFTERNOON...A FEW OF WHICH COULD BECOME SEVERE AND PRODUCE LARGE HAIL. THE SEVERE WEATHER THREAT THIS AFTERNOON WILL BE DIRECTLY RELATED TO THE AMOUNT OF HEATING THAT CAN OCCUR NEAR AND SOUTH OF THE OUTFLOW BOUNDARY. LATER THIS AFTERNOON AND TONIGHT...A STRONG UPPER LEVEL SYSTEM IS FORECAST TO MOVE OUT OF THE ROCKIES AND INTO KANSAS AND NORTHWEST OKLAHOMA. A CLUSTER OF SEVERE THUNDERSTORMS IS EXPECTED TO ORGANIZE IN NORTHWEST OKLAHOMA AND SOUTHWEST KANSAS AS THE UPPER LEVEL SYSTEM APPROACHES AND INTERACTS WITH A VERY UNSTABLE AIRMASS. THESE STORMS WILL MOVE EAST SOUTHEAST INTO NORTHEAST OKLAHOMA AFTER MIDNIGHT. LOW AND MID LEVEL WINDS WILL BE FAVORABLE FOR SOME OF THE STORMS TO REMAIN SEVERE AS THEY MOVE INTO EASTERN OKLAHOMA... WITH ISOLATED SUPERCELLS POSSIBLE THROUGH THE NIGHT. .DISCUSSION... A COMPLEX SURFACE PATTERN WILL DEVELOP ACROSS KANSAS...OKLAHOMA... AND ARKANSAS TODAY. THE LOCATION AND STRENGTH OF THE OUTFLOW BOUNDARY FROM THIS MORNINGS THUNDERSTORMS WILL BE THE MAIN UNCERTAINTY REGARDING CONVECTIVE DEVELOPMENT THIS AFTERNOON. BY LATE TONIGHT...WIDESPREAD THUNDERSTORMS...A FEW OF WHICH WILL LIKELY BE SEVERE...ARE EXPECTED TO DEVELOP OR MOVE INTO EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. CURRENT INDICATIONS ARE THAT THUNDERSTORMS THIS MORNING WILL REMAIN STRONG TO SEVERE UNTIL MID MORNING...AND SHOULD DISSIPATE BY EARLY AFTERNOON. THE OUTFLOW BOUNDARY IS EXPECTED TO PUSH INTO SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS THIS AFTERNOON...BEFORE WEAKENING AND LIFTING NORTH THIS AFTERNOON. THE OUTFLOW BOUNDARY MAY BE A FOCUS FOR THUNDERSTORM DEVELOPMENT AFTER 3 PM...MAINLY ACROSS NORTHWEST ARKANSAS AND SOUTHEAST OKLAHOMA. THE SEVERE POTENTIAL WITH ANY THUNDERSTORMS THIS AFTERNOON WILL BE DEPENDENT ON THE AMOUNT OF LOW LEVEL DESTABILIZATION IN AREAS ALONG AND SOUTH OF THE OUTFLOW BOUNDARY. AS SURFACE LOW PRESSURE DEVELOPS IN SOUTHEAST COLORADO TODAY... CONDITIONS WILL BECOME FAVORABLE FOR SUPERCELL THUNDERSTORMS IN SOUTHWEST KANSAS AND NORTHWEST OKLAHOMA. A COMPLEX OF SEVERE THUNDERSTORMS WILL LIKELY BECOME ORGANIZED AHEAD OF THE UPPER LEVEL SYSTEM AND MOVE EAST AND SOUTHEAST OVERNIGHT. STRONG TO SEVERE THUNDERSTORMS SHOULD REACH NORTHEAST OKLAHOMA AFTER 2 AM... AND NORTHWEST ARKANSAS AFTER 4 AM. LOW AND MID LEVEL WIND FIELDS WILL BE FAVORABLE FOR SUPERCELLS WITHIN THE THUNDERSTORM COMPLEX... BUT THE MAIN THREAT WILL BE DAMAGING STRAIGHT LINE WINDS WITH BOW ECHOES. .EMERGENCY MANAGEMENT AGENCY AND SPOTTER ACTIVATION... EMERGENCY MANAGEMENT AGENCIES ACROSS NORTHEAST OKLAHOMA SHOULD REMAIN ALERT OR ACTIVATED UNTIL LATE MORNING. STORM SPOTTER GROUPS ACROSS THE REST OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD BE PREPARED FOR POSSIBLE ACTIVATION THIS AFTERNOON AND ESPECIALLY TONIGHT.
Special weather statement, May 31, 6:00 AM CDT, 55 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-011100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT MON MAY 31 1999 A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS TODAY AND TONIGHT. .SYNOPSIS... A CLUSTER OF STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO MOVE SOUTHEAST ACROSS NORTHEAST OKLAHOMA THIS MORNING. A FEW OF THE STORMS THIS MORNING WILL REMAIN STRONG TO SEVERE...MAINLY ACROSS NORTHEAST OKLAHOMA...AS THEY CONTINUE TO MOVE SOUTHEAST. THESE STORMS ARE EXPECTED TO GRADUALLY WEAKEN BY MID TO LATE MORNING AS THEY MOVE INTO A MORE STABLE AIRMASS ACROSS NORTHWEST ARKANSAS AND EXTREME EASTERN OKLAHOMA. AN OUTFLOW BOUNDARY FROM THIS MORNINGS THUNDERSTORMS IS EXPECTED TO BECOME STATIONARY ACROSS NORTHWEST ARKANSAS AND SOUTHEAST OKLAHOMA THIS AFTERNOON. THIS BOUNDARY MAY SERVE AS A FOCUS FOR ADDITIONAL THUNDERSTORM DEVELOPMENT THIS AFTERNOON...A FEW OF WHICH COULD BECOME SEVERE AND PRODUCE LARGE HAIL. THE SEVERE WEATHER THREAT THIS AFTERNOON WILL BE DIRECTLY RELATED TO THE AMOUNT OF HEATING THAT CAN OCCUR NEAR AND SOUTH OF THE OUTFLOW BOUNDARY. LATER THIS AFTERNOON AND TONIGHT...A STRONG UPPER LEVEL SYSTEM IS FORECAST TO MOVE OUT OF THE ROCKIES AND INTO KANSAS AND NORTHWEST OKLAHOMA. A CLUSTER OF SEVERE THUNDERSTORMS IS EXPECTED TO ORGANIZE IN NORTHWEST OKLAHOMA AND SOUTHWEST KANSAS AS THE UPPER LEVEL SYSTEM APPROACHES AND INTERACTS WITH A VERY UNSTABLE AIRMASS. THESE STORMS WILL MOVE EAST SOUTHEAST INTO NORTHEAST OKLAHOMA AFTER MIDNIGHT. LOW AND MID LEVEL WINDS WILL BE FAVORABLE FOR SOME OF THE STORMS TO REMAIN SEVERE AS THEY MOVE INTO EASTERN OKLAHOMA... WITH ISOLATED SUPERCELLS POSSIBLE THROUGH THE NIGHT. .DISCUSSION... A COMPLEX SURFACE PATTERN WILL DEVELOP ACROSS KANSAS...OKLAHOMA... AND ARKANSAS TODAY. THE LOCATION AND STRENGTH OF THE OUTFLOW BOUNDARY FROM THIS MORNINGS THUNDERSTORMS WILL BE THE MAIN UNCERTAINTY REGARDING CONVECTIVE DEVELOPMENT THIS AFTERNOON. BY LATE TONIGHT...WIDESPREAD THUNDERSTORMS...A FEW OF WHICH WILL LIKELY BE SEVERE...ARE EXPECTED TO DEVELOP OR MOVE INTO EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. CURRENT INDICATIONS ARE THAT THUNDERSTORMS THIS MORNING WILL REMAIN STRONG TO SEVERE UNTIL MID MORNING...AND SHOULD DISSIPATE BY EARLY AFTERNOON. THE OUTFLOW BOUNDARY IS EXPECTED TO PUSH INTO SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS THIS AFTERNOON...BEFORE WEAKENING AND LIFTING NORTH THIS AFTERNOON. THE OUTFLOW BOUNDARY MAY BE A FOCUS FOR THUNDERSTORM DEVELOPMENT AFTER 3 PM...MAINLY ACROSS NORTHWEST ARKANSAS AND SOUTHEAST OKLAHOMA. THE SEVERE POTENTIAL WITH ANY THUNDERSTORMS THIS AFTERNOON WILL BE DEPENDENT ON THE AMOUNT OF LOW LEVEL DESTABILIZATION IN AREAS ALONG AND SOUTH OF THE OUTFLOW BOUNDARY. AS SURFACE LOW PRESSURE DEVELOPS IN SOUTHEAST COLORADO TODAY... CONDITIONS WILL BECOME FAVORABLE FOR SUPERCELL THUNDERSTORMS IN SOUTHWEST KANSAS AND NORTHWEST OKLAHOMA. A COMPLEX OF SEVERE THUNDERSTORMS WILL LIKELY BECOME ORGANIZED AHEAD OF THE UPPER LEVEL SYSTEM AND MOVE EAST AND SOUTHEAST OVERNIGHT. STRONG TO SEVERE THUNDERSTORMS SHOULD REACH NORTHEAST OKLAHOMA AFTER 2 AM... AND NORTHWEST ARKANSAS AFTER 4 AM. LOW AND MID LEVEL WIND FIELDS WILL BE FAVORABLE FOR SUPERCELLS WITHIN THE THUNDERSTORM COMPLEX... BUT THE MAIN THREAT WILL BE DAMAGING STRAIGHT LINE WINDS WITH BOW ECHOES. .EMERGENCY MANAGEMENT AGENCY AND SPOTTER ACTIVATION... EMERGENCY MANAGEMENT AGENCIES ACROSS NORTHEAST OKLAHOMA SHOULD REMAIN ALERT OR ACTIVATED UNTIL LATE MORNING. STORM SPOTTER GROUPS ACROSS THE REST OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD BE PREPARED FOR POSSIBLE ACTIVATION THIS AFTERNOON AND ESPECIALLY TONIGHT.
Local storm report, May 31, 6:11 AM CDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
611 AM CDT MON MAY 31 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 AM DEWEY OK .75 INCH HAIL
05/31/99 WASHINGTON
0439 AM HOMINY OK 60 MPH TSTM GUST
05/31/99 OSAGE REPORTED BY SPOTTERS.
0458 AM OWASSO OK WIND DAMAGE
05/31/99 TULSA TREE LIMBS DOWN AND
ROOF BLOWN OFF METAL
SHED.Local storm report, May 31, 6:11 AM CDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
611 AM CDT MON MAY 31 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 AM DEWEY OK .75 INCH HAIL
05/31/99 WASHINGTON
0439 AM HOMINY OK 60 MPH TSTM GUST
05/31/99 OSAGE REPORTED BY SPOTTERS.
0458 AM OWASSO OK WIND DAMAGE
05/31/99 TULSA TREE LIMBS DOWN AND
ROOF BLOWN OFF METAL
SHED.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 2:27 AM CDT | Severe Thunderstorm Warning | TSA | Osage | 63 min |
| May 31, 4:01 AM CDT | Severe Thunderstorm Warning | TSA | Osage | 59 min |
| May 31, 4:14 AM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 61 min |
| May 31, 4:49 AM CDT | Severe Thunderstorm Warning | TSA | Rogers, Tulsa | 41 min |
| May 31, 4:58 AM CDT | Severe Thunderstorm Warning | TSA | Osage | 47 min |
| May 31, 5:31 AM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers | 44 min |
| May 31, 6:00 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Okmulgee, Wagoner | 45 min |
| May 31, 6:17 AM CDT | Severe Thunderstorm Warning | TSA | Delaware | 43 min |
| May 31, 6:44 AM CDT | Severe Thunderstorm Warning | TSA | Adair | 46 min |
| May 31, 6:58 AM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer, Pittsburg | 47 min |
| May 31, 6:58 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okfuskee | 47 min |
| May 31, 7:40 AM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pittsburg, Pushmataha | 50 min |
| May 31, 7:31 AM CDT | Severe Thunderstorm Warning | TSA | Benton, Madison, Washington | 59 min |
| May 31, 7:31 AM CDT | Severe Thunderstorm Warning | TSA | Carroll | 59 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 1999Every severe thunderstorm warning in 1999
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.