Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 169, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 5, 1998, 7:52 AM CDT for Washington County, Arkansas. It was in force for 53 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 5, 1998, 7:52 AM CDT (12:52 UTC)
- Expired
- May 5, 1998, 8:45 AM CDT
- In force
- 53 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Washington County, AR
The radar
The Western Arkansas radar (KSRX), 78 km from the middle of the area, began a volume at 12:52 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 5, 8:15 AM CDT | Hail 0.75 | Springdale, AR | An isolated severe thunderstorm, producing dime-sized hail, formed near Springdale in advance of a larger complex of thunderstorms over eastern Oklahoma. |
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 12:00Z, 0.9 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1886 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 5, 3:20 AM CDT, 4 hours 32 minutes earlier.
Area forecast discussion, May 5, 3:20 AM CDT, 4 hours 32 minutes before
FPUS3 KTUL 050821
AFDTUL
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
320 AM CDT TUE MAY 5 1998
PROBLEM OF THE DAY:
FIGURING OUT WHAT WILL HAPPEN AFTER THIS MORNING.
MODELS ARE OSEVERE THUNDERSTORM WARNING FOR...
SOUTHEAST LINCOLN COUNTY IN CENTRAL OKLAHOMA
* UNTIL 400 AM CDT
* AT 322 AM CDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR
PRAGUE...MOVING EAST-NORTHEAST AT 15 MILES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE PRAGUE
HAIL UP TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO AT LEAST 60 MPH ARE
LIKELY. SEEK SHELTER INDOORS...AWAY FROM WINDOWS...AND AVOID
ELECTRICAL APPLIANCES AND TELEPHONES.
LAT...LON 3547 9682 3547 9667 3567 9622 3563 9664In the hours before
Special weather statement, May 5, 6:00 AM CDT, 1 hour 52 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-061200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT TUE MAY 5 1998 ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE EARLY THIS MORNING SOUTHEAST OF A JAY TO OKEMAH LINE. NUMEROUS SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS LATE THIS AFTERNOON AND TONIGHT. THUNDERSTORMS WERE MOVING ACROSS EASTERN OKLAHOMA EARLY THIS MORNING. THESE STORMS HAVE BEEN SLOWLY WEAKENING BUT AN ISOLATED STORM MAY STILL PRODUCE LARGE HAIL OR DAMAGING WINDS EARLY THIS MORNING TO THE SOUTHEAST OF A JAY TO OKEMAH LINE. EARLY THIS MORNING A WARM FRONT EXTENDED FROM NEAR WICHITA FALLS TEXAS TO SOUTH OF SHREVEPORT LOUISIANA. A COLD FRONT EXTENDED FROM NEAR MANHATTAN KANSAS INTO THE OKLAHOMA PANHANDLE. THE WARM FRONT IS EXPECTED TO MOVE SLOWLY NORTH TODAY WHILE THE COLD FRONT MOVES SLOWLY SOUTH. IN ADDITION AN UPPER LEVEL DISTURBANCE WILL APPROACH THE AREA FROM THE WEST THIS AFTERNOON AND EVENING. TEMPERATURES WILL WARM INTO THE 80S THIS AFTERNOON ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS WITH DEWPOINTS CLIMBING INTO THE 60S. THIS WILL RESULT IN THE AIRMASS BECOMING QUITE UNSTABLE BY MID TO LATE AFTERNOON. BY LATE AFTERNOON...THE COLD FRONT WILL BE NEAR THE OKLAHOMA/KANSAS BORDER AND THE WARM FRONT WILL BE IN THE VICINITY OF THE RED RIVER. THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE COLD FRONT LATE THIS AFTERNOON AND ALSO TO THE NORTH OF THE WARM FRONT. THESE THUNDERSTORMS WILL RAPIDLY BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS LIKELY. THE WIND PROFILE WILL ALSO BE FAVORABLE FOR ROTATING STORMS SO TORNADOES WILL ALSO BE POSSIBLE. ONE POSSIBLE NEGATIVE FACTOR FOR TORNADO DEVELOPMENT WILL BE A FORECAST WEAKNESS IN THE MID LEVEL WINDS. THE STORMS ARE EXPECTED TO ORGANIZE INTO A LARGE COMPLEX OF STORMS THIS EVENING WHICH WILL THEN MOVE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. DAMAGING WINDS WILL THEN BECOME THE MAIN SEVERE WEATHER THREAT ALTHOUGH SOME OF THE STORMS WILL STILL PRODUCE LARGE HAIL. THE SEVERE WEATHER THREAT SHOULD DIMINISH AFTER 2 AM AS THE STORMS MOVE EAST OF THE AREA. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD MONITOR THE LATEST WEATHER CONDITIONS AND FORECASTS AND BE READY FOR EXPECTED ACTIVATION BY LATE THIS AFTERNOON.
Special weather statement, May 5, 6:00 AM CDT, 1 hour 52 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-061200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT TUE MAY 5 1998 ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE EARLY THIS MORNING SOUTHEAST OF A JAY TO OKEMAH LINE. NUMEROUS SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS LATE THIS AFTERNOON AND TONIGHT. THUNDERSTORMS WERE MOVING ACROSS EASTERN OKLAHOMA EARLY THIS MORNING. THESE STORMS HAVE BEEN SLOWLY WEAKENING BUT AN ISOLATED STORM MAY STILL PRODUCE LARGE HAIL OR DAMAGING WINDS EARLY THIS MORNING TO THE SOUTHEAST OF A JAY TO OKEMAH LINE. EARLY THIS MORNING A WARM FRONT EXTENDED FROM NEAR WICHITA FALLS TEXAS TO SOUTH OF SHREVEPORT LOUISIANA. A COLD FRONT EXTENDED FROM NEAR MANHATTAN KANSAS INTO THE OKLAHOMA PANHANDLE. THE WARM FRONT IS EXPECTED TO MOVE SLOWLY NORTH TODAY WHILE THE COLD FRONT MOVES SLOWLY SOUTH. IN ADDITION AN UPPER LEVEL DISTURBANCE WILL APPROACH THE AREA FROM THE WEST THIS AFTERNOON AND EVENING. TEMPERATURES WILL WARM INTO THE 80S THIS AFTERNOON ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS WITH DEWPOINTS CLIMBING INTO THE 60S. THIS WILL RESULT IN THE AIRMASS BECOMING QUITE UNSTABLE BY MID TO LATE AFTERNOON. BY LATE AFTERNOON...THE COLD FRONT WILL BE NEAR THE OKLAHOMA/KANSAS BORDER AND THE WARM FRONT WILL BE IN THE VICINITY OF THE RED RIVER. THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE COLD FRONT LATE THIS AFTERNOON AND ALSO TO THE NORTH OF THE WARM FRONT. THESE THUNDERSTORMS WILL RAPIDLY BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS LIKELY. THE WIND PROFILE WILL ALSO BE FAVORABLE FOR ROTATING STORMS SO TORNADOES WILL ALSO BE POSSIBLE. ONE POSSIBLE NEGATIVE FACTOR FOR TORNADO DEVELOPMENT WILL BE A FORECAST WEAKNESS IN THE MID LEVEL WINDS. THE STORMS ARE EXPECTED TO ORGANIZE INTO A LARGE COMPLEX OF STORMS THIS EVENING WHICH WILL THEN MOVE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. DAMAGING WINDS WILL THEN BECOME THE MAIN SEVERE WEATHER THREAT ALTHOUGH SOME OF THE STORMS WILL STILL PRODUCE LARGE HAIL. THE SEVERE WEATHER THREAT SHOULD DIMINISH AFTER 2 AM AS THE STORMS MOVE EAST OF THE AREA. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD MONITOR THE LATEST WEATHER CONDITIONS AND FORECASTS AND BE READY FOR EXPECTED ACTIVATION BY LATE THIS AFTERNOON.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:52 AM CDT | Severe Thunderstorm Warning | TSA | Washington | 38 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 1998Every severe thunderstorm warning in 1998
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; radar from the NEXRAD Level II archive.