Tornado Warning 27, NWS Norman, OK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OKLAHOMA CITY OKLAHOMA
400 AM CDT SAT APR 22 1995

ISOLD ELEVATED CONVECTION DVLPD ACRS CNTL OK ERLY THIS IN AREA OF
MID LVL INSTBLTY AND PRODUCED SOME ISOLD RPTS VRY SMALL HAIL. SFC DATA
SHOWS FNTL BNDRY ACRS CNTL TX. H8 FNT OVR CNTL OK. WSR-88D VAD WND
INDICATES H8 WINDS FM SE.

SCT TSTMS PSBL TDY ACRS N TX AND FM SW THRU N CNTL OK AS ISENT LIFT...GD
FLOW OF MOIST...AND WKR CAPPING MAKES THIS AREA MOST LIKELY FOR
CONVECTION.

OTRW...NGM/ETA  SLOWER THAN AVN IN HANDLING OF LRGE DEEP TROF ACRS CNTL
US. SLOWER SOLUTION ACCEPTED...AND THUS A COMB OF THESE 2 MDLS IN FCST
PCKGE. WDSPRD RA EVENT WL SET UP WITH HI POPS ALL ZONES TNTE. TMRW POPS
WL BE HIEST IN N OK...LWST IN N TX AND SYS BGNS TO MOV TO NE.

GRDL WARMING IN XTNDD PACKGE .

FCSTID=07
HBR   53  37  57  40 / 60  70  10  0
OKC   55  42  57  40 / 60  80  20  0
SPS   52  42  61  41 / 50  60  10  0
GAG   45  34  53  36 / 80  100 40  0
PNC   53  40  54  39 / 60  90  30  0
DUA   62  45  62  42 / 60  70  50  0

.OKC...NONE.
.TX...NONE.

PURPURA

OKZ004>053-TXZ083>090-211930-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
6 30 AM CDT FRI APR 21 1995

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN PORTIONS OF NORTH
TEXAS...AS WELL AS SOUTHWESTERN...CENTRAL...AND SOUTHEASTERN
OKLAHOMA. THE SLIGHT RISK AREA IS SOUTH AND EAST OF A LINE FROM
HOLLIS TO STILLWATER OKLAHOMA. THE PRIMARY THREAT WILL BE LARGE HAIL.

EARLY THIS MORNING A LAYER OF SHALLOW COLD AIR WAS LOCATED ACROSS
NORTH TEXAS AND ALL OF OKLAHOMA. SOUTHERLY WINDS ABOVE THIS COLD
DOME WERE TRANSPORTING WARM MOIST AIR FROM CENTRAL AND SOUTH TEXAS.
MEANWHILE AN UPPER LEVEL STORM SYSTEM WAS APPROACHING OKLAHOMA FROM THE
SOUTHWESTERN UNITED STATES. THE COMBINATION OF LIFTING OF WARM MOIST AIR
OVER THE DOME OF SHALLOW COLD AIR NEAR THE SURFACE AND INCREASINGLY
UNSTABLE AIR AT MID AND UPPER LEVELS WILL SET THE STAGE FOR SEVERE
THUNDERSTORMS. LARGE HAIL WILL BE THE PRIMARY THREAT. ALTHOUGH STRONG
WINDS ARE POSSIBLE...THEY ARE NOT LIKELY WITH THE STORMS.

THE WINDS ABOVE THE SURFACE WILL TURN TO MORE NORTHEASTERLY DURING
THE MORNING...HELPING TO INCREASE STABILITY OF THE AIRMASS IN THE
NORTHERN PART OF THE SLIGHT RISK AREA DURING THE AFTERNOON. THUS DURING
THE DAY THE SEVERE WEATHER THREAT WILL SHIFT SOUTH AND EASTWARD TO
SOUTHEASTERN OKLAHOMA.

AN UPDATED THUNDERTORM OUTLOOK WILL BE ISSUED AROUND 1230 PM

PURPURA

OKZ004>053-TXZ083>090-211930-

THUNDERSTORM OUTLOOK ...CORRECTED DATE...
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
6 30 AM CDT SAT APR 22 1995

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN PORTIONS OF NORTH
TEXAS...AS WELL AS SOUTHWESTERN...CENTRAL...AND SOUTHEASTERN
OKLAHOMA. THE SLIGHT RISK AREA IS SOUTH AND EAST OF A LINE FROM
HOLLIS TO STILLWATER OKLAHOMA. THE PRIMARY THREAT WILL BE LARGE HAIL.

EARLY THIS MORNING A LAYER OF SHALLOW COLD AIR WAS LOCATED ACROSS
NORTH TEXAS AND ALL OF OKLAHOMA. SOUTHERLY WINDS ABOVE THIS COLD
DOME WERE TRANSPORTING WARM MOIST AIR FROM CENTRAL AND SOUTH TEXAS.
MEANWHILE AN UPPER LEVEL STORM SYSTEM WAS APPROACHING OKLAHOMA FROM THE
SOUTHWESTERN UNITED STATES. THE COMBINATION OF LIFTING OF WARM MOIST AIR
OVER THE DOME OF SHALLOW COLD AIR NEAR THE SURFACE AND INCREASINGLY
UNSTABLE AIR AT MID AND UPPER LEVELS WILL SET THE STAGE FOR SEVERE
THUNDERSTORMS. LARGE HAIL WILL BE THE PRIMARY THREAT. ALTHOUGH STRONG
WINDS ARE POSSIBLE...THEY ARE NOT LIKELY WITH THE STORMS.

THE WINDS ABOVE THE SURFACE WILL TURN TO MORE NORTHEASTERLY DURING
THE MORNING...HELPING TO INCREASE STABILITY OF THE AIRMASS IN THE
NORTHERN PART OF THE SLIGHT RISK AREA DURING THE AFTERNOON. THUS DURING
THE DAY THE SEVERE WEATHER THREAT WILL SHIFT SOUTH AND EASTWARD TO
SOUTHEASTERN OKLAHOMA.

AN UPDATED THUNDERTORM OUTLOOK WILL BE ISSUED AROUND 1230 PM

PURPURA