Alert archive / Arkansas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 76, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 4, 1997, 11:20 PM CST for Carroll County, Madison County, Arkansas. It was in force for 55 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
- Apr 4, 1997, 11:20 PM CST (05:20 UTC)
- Expired
- Apr 5, 1997, 12:15 AM CST
- In force
- 55 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Carroll County, AR, Madison County, AR
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 4, 11:55 PM CST | Thunderstorm Wind 52 | Green Forest, AR | Isolated severe thunderstorms developed in northwest Arkansas during the late evening of April 4th. Thunderstorm winds gusted to 60 miles an hour in Mountainburg and 1 mile southwest of Green Forest, and power lines were blown down in Van Buren. |
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, 5.3 hours before the alert went out and 82 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
- 15 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 521 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
886 WUUS1 KTUL 050522 RRA SVRTUL ARC015-087-050615- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1120 PM CST FRI APR 4 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWEST ARKANSAS ...CARROLL COUNTY...EASTERN MADISON COUNTY AT 11 20 PM A SEVERE THUNDERSTORM WAS NEAR AURORA. MOVEMENT WAS TO THE NORTHEAST AT 40 MILES AN HOUR. HUNTSVILLE...MARBLE...AND METALTON ARE IN THE PATH OF THIS STORM. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.
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 Apr 4, 9:43 PM CST, 1 hour 37 minutes earlier.
Area forecast discussion, Apr 4, 9:43 PM CST, 1 hour 37 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 940 PM CST FRI APR 4 1997 ELONGATED UPR LO CRNTLY NR THE TX/NM BRDR IS GRADU MVG EWD. SFC TROF STRETCHES FM LO IN ERN CO ACRS CNTRL OK INTO ERN TX W/SRN PTN OF TROF MVG QUITE A BIT MORE THAN NRN SCTNS. APRS TO BE A DRYLINE REMAINING ACRS ERN TX PNHDL. ADAP SHOWS MOISTURE CONV INCRSG OVR THE PAST FEW HRS ALNG BOTH OF THESE BNDRYS. HV SEEN CNVCTN INCRS IN CVRG AND INTENSITY DURING THE PAST HR ACRS SE OK RESULTING IN FIRST WARNINGS FOR CWA. SOME HVY RAINFALL WL OCCUR W/THESE STRMS BUT BELIEVE THEY SHLD QUICKLY MV THROUGH FA. SO ALTHO PARTS OF SE OK ALREADY HV SATURATED GRND W/LO FFG VALUES WL LET LCLY HVY RAINFALL IN ZFP COVER IT. QUESTION IS WHETHER ANY SHRA/TSRA CAN REDEVELOP FURTHER W ALNG DRYLINE AS DYNAMICS MV OVR IT. 00Z RUC SAYS YES WHILE 00Z NGM SAYS NO. IF IT DOES OCCUR SHLD JUST BE SOME ADNTL PRECIP AS INSTABILITY IS CONCENTRATED AL$ONG AND AHEAD OF INIT TROF AXIS. CRNT FCST SEEMS TO HV SITN IN HAND ALTHO LOOKS LIKE SVR THREAT IS MINIMAL ACRS NE OK. BUT WL HOLD OFF ON UPDATE FOR NOW AND PROB MAKE SOME ADJS TO FCST BTWN 05 AND 06Z. 07 .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, Apr 4, 8:21 PM CST, 2 hours 59 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-051200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK...UPDATED NATIONAL WEATHER SERVICE TULSA OK 820 PM CST FRI APR 4 1997 ...A FEW SEVERE THUNDERSTORMS ARE EXPECTED IN SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS TONIGHT... ...ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE IN NORTHEAST OKLAHOMA TONIGHT... A STRONG UPPER LEVEL STORM SYSTEM WAS BEGINNING TO APPROACH THE AREA THIS EVENING. AT THE SURFACE...A DRYLINE WAS MOVING INTO CENTRAL OKLAHOMA AND WAS LOCATED JUST WEST OF OKLAHOMA CITY AND NORMAN AT 8 PM. SHOWERS AND THUNDERSTORMS WERE INCREASING IN COVERAGE AND INTENSITY ACROSS SOUTHEAST OKLAHOMA THIS EVENING AND THIS TREND IS EXPECTED TO CONTINUE AS THE UPPER LEVEL SYSTEM AND DRYLINE CONTINUE TO MOVE EAST. A FEW OF THE THUNDERSTORMS IN SOUTHEAST OKLAHOMA ARE EXPECTED TO BECOME SEVERE BEFORE 9 PM THIS EVENING. THE STORMS WILL MOVE RAPIDLY NORTH NORTHEAST AND ENTER NORTHWEST ARKANSAS AFTER 10 PM. THE MAIN SEVERE WEATHER THREAT WILL BE DAMAGING WINDS ALTHOUGH LARGE HAIL WILL ALSO BE POSSIBLE. THE VERTICAL WIND PROFILE ALSO SUGGESTS THE POSSIBILITY OF AN ISOLATED TORNADO OR TWO IN SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS. ALTHOUGH INSTABILITY IS RATHER LIMITED IN NORTHEAST OKLAHOMA...THERE IS STILL A POSSIBILITY OF ISOLATED SEVERE THUNDERSTORMS DEVELOPING AHEAD OF THE DRYLINE AND UPPER LEVEL STORM SYSTEM. DAMAGING WINDS WILL BE THE MAIN THREAT WITH ANY SEVERE STORM IN NORTHEAST OKLAHOMA. AS THE DRYLINE MOVES RAPIDLY EAST ACROSS THE AREA LATER TONIGHT...THE THREAT OF SEVERE WEATHER WILL DIMINISH AFTER 2 AM IN EASTERN OKLAHOMA AND AFTER 4 AM IN NORTHWEST ARKANSAS. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD MONITOR THE LATEST STATEMENTS AND FORECASTS AND BE PREPARED FOR POSSIBLE ACTIVATION TONIGHT.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 9:48 PM CST | Severe Thunderstorm Warning | TSA | Crawford, Sebastian | 57 min |
| Apr 4, 10:42 PM CST | Severe Thunderstorm Warning | TSA | Crawford | 18 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 1997Every severe thunderstorm warning in 1997
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.