Alert archive / Oklahoma / Flash Flood Warnings in 1998

Flash Flood Warning 19, NWS Norman, OK

May 25, 1998Alfalfa County, Grant County, Kay County, Oklahoma

NWS Norman, OK issued this flash flood warning at May 25, 1998, 2:55 AM CDT for Alfalfa County, Grant County, Kay County, Oklahoma. It was in force for 2 hr. No storm report in the archive falls 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.

The facts

Issued: May 25, 1998, 2:55 AM CDT (07:55 UTC)
Expired: May 25, 1998, 5:00 AM CDT
In force: 2 hr
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Alfalfa County, OK, Grant County, OK, Kay County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 7.9 hours before the alert went out and 175 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: 3427 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1455 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 16.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 250757
FFWOKC
OKC003-053-071-251000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORMAN OK
255 AM CDT MON MAY 25 1998

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
     KAY COUNTY IN NORTHEAST OKLAHOMA
     ALFALFA COUNTY IN NORTHWEST OKLAHOMA
     GRANT COUNTY IN NORTHWEST OKLAHOMA

* UNTIL 500 AM CDT

* AT 255 AM CDT DOPPLER RADAR INDICATED VERY HEAVY RAIN CONTINUING 
OVER SOUTHERN ALFALFA AND WESTERN GRANT COUNTIES. THE STORMS 
PRODUCING THE HEAVY RAIN WILL SPREAD INTO KAY COUNTY BY 330 AM. 
LOCALLY HEAVY RAINFALL OF AT LEAST 3 TO 5 INCHES HAVE OCCURRED 
OVERNIGHT CAUSING FLOODING IN SOME LOW LYING AREAS. ADDITIONAL HEAVY 
RAIN WILL RAPIDLY RUNOFF AND INCREASE THE THREAT OF FLOODING. 

* LOCATIONS IN THE WARNING INCLUDE WAKITA...TONKAWA...SUMPTER...SALT
  FORK...RENFROW...POND CREEK...PONCA CITY...NUMA...NEWKIRK...NASH...
  NARDIN...MEDFORD...MC WILLIE...LAMONT...KILDARE...JET...
  JEFFERSON...HELENA...GOLTRY...DEER CREEK...BRAMAN...BLACKWELL AND
  AMORITA

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE tUP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3696 9831 3649 9841 3649 9816 3662 9811
          3664 9704 3701 9701
CJS

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this flash flood warning went out at May 24, 3:40 PM CDT, 11 hours 15 minutes earlier.

Area forecast discussion, May 24, 3:40 PM CDT, 11 hours 15 minutes before

FPUS3 KOKC 242041
AFDOKC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
340 PM CDT SUN MAY 24 1998

WMFNT LIFTING ACRS FA THIS AFTN EXPCTD TO BE FOCUS FOR TSTMS TNGT.
SVR STMS LKLY EARLY...THEN EVOLVING INTO AN MCS WITH FOCUS SHIFTING
TO HVY RAIN. PRIMARY THREAT AREA WL BE ACRS THE N. AMS ALSO BCMG
MORE UNSTBL TO THE SW VCNTY DRYLN AND SFC LOW. CNVCGC IN THIS AREA
INITIALLY NOT VRY STG...BUT IS IMPROVING. LTST VSBL STLT IMGRY SHOWS
CU STARTING TO BUBBLE BTWN CDS/LBB/ABI WHERE NSSL MM5 OUTPUT SHOWS
TSTM DVLPMNT. CHCS FOR ISOLD SVR WL IMPROVE THIS AREA AS WK SHTWV IN
SUBTROP JET BRUSHES OVR DRYLN.

MAIN QUESTION IS HOW FAR S WL SFC BNDRY GO TNGT AND MON. WHEREVER IT
ENDS UP ON MON...MORE SVR WL BE PSBL. ATTM WL OPT FOR A BLEND OF AVN
AND ETA...IE A LTL FARTHER N ON THE W END OF FNT AND FURTHER SOUTH
OVR ERN OK WHERE OUTFLO FM MCS MAY GIVE IT A PUSH. ELEVATED ACTVTY
WL ALSO BE PSBL N OF BNDRY...SO WL GO WITH CHC POPS EVERYWHERE WITH
HIGHEST POPS IN THE S AND E.

THIS MORNGS MRF IS TRENDING AWAY FM YDAYS QUESTIONABLE SOLUTION OF
PUSHING FNTL BNDRY INTO CNTL TX ON WED. NOW IT TAKES THE FNT INTO
NTX LT TUE AND WASHES IT BACK NWD ACRS OK ON WED. THIS FITS BETTER
WITH UPR PATN AND LUKS MORE REASONABLE. WL KEEP CHC POPS OVR AREA
WED WITH THE WMFNT. LTR IN THE WEEK...TSTM CHCS SHIFT WWD TO PNHDLS
WHERE SCT CNVCTN MAY GET GOING ALG LEE TROF WHERE WARM SFC TEMPS MAY
BE SUFFICIENT TO BREAK CAP. PCPN MAY THEN DRIFT INTO WRN ZNS BEFORE
DSPTG. NEXT PUSH OF CANADIAN AIR COMES INTO THE PLNS LT THU AND
FRI...BUT IS EXPCTD TO REMAIN N OF FA.

STG UPR LOW OVR THE DATA SPARCE AREA W OF BAHA IS VIRTUALLY IGNORED
BY ALL THE MDLS. ENERGY FM THIS SYSTEM CUD COME NEWD WITH SUBTROP
JET AND AFFECT AREA LTR THIS WEEK.   ..04..

GAG 58/76/56/74 7221    PNC 61/79/58/76 +432    HBR 61/82/60/80 4221
SPS 66/85/63/81 4322    OKC 65/83/61/80 6433    DUA 69/88/66/85 3664

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

In the hours before

Local storm report, May 25, 12:55 AM CDT, 2 hours before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OKLAHOMA
1255 AM CDT MON MAY 25 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1240 AM    3 SE BRECKENRIDGE         OK   66 MPH WIND GUST MEASURED
05/25/98   GARFIELD                       OKLAHOMA MESONETWORK

JS

Local storm report, May 25, 2:20 AM CDT, 35 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
220 AM CDT MON MAY 25 1998

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0155 AM        ALVA                  OK   WIND DAMAGE
05/25/98       WOODS                      POWER LINES AND TREES
                                          DOWN. SOME HOUSE/TRAILER
                                          DAMAGE.

0155 AM        ALVA                  OK   1.75 INCH HAIL
05/25/98       WOODS

CW

Local storm report, May 25, 2:20 AM CDT, 35 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
220 AM CDT MON MAY 25 1998

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0155 AM        ALVA                  OK   WIND DAMAGE
05/25/98       WOODS                      POWER LINES AND TREES
                                          DOWN. SOME HOUSE/TRAILER
                                          DAMAGE.

0155 AM        ALVA                  OK   1.75 INCH HAIL
05/25/98       WOODS

CW

Local storm report, May 25, 2:34 AM CDT, 21 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
234 AM CDT MON MAY 25 1998

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0215 AM    CHEROKEE                  OK   1.00 INCH HAIL
05/25/98   ALFALFA                        EST 60 MPH WINDS.
                                          LIMBS DOWN SIZE UNK.

CW

Local storm report, May 25, 2:34 AM CDT, 21 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
234 AM CDT MON MAY 25 1998

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0215 AM    CHEROKEE                  OK   1.00 INCH HAIL
05/25/98   ALFALFA                        EST 60 MPH WINDS.
                                          LIMBS DOWN SIZE UNK.

CW

Local storm report, May 25, 2:42 AM CDT, 13 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
242 AM CDT MON MAY 25 1998

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0230 AM    CHEROKEE                  OK   70 MPH WIND GUST.
05/25/98   WOODS                          5 INCH RAIN..SOME
                                          ROADS UNDER WATER
                                          IN N PART OF TOWN.

CW

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 7:26 PM CDT	Tornado Warning	OUN	Grant	34 min
May 24, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	48 min
May 24, 7:58 PM CDT	Tornado Warning	OUN	Grant	47 min
May 24, 8:00 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	30 min
May 24, 8:22 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson	38 min
May 24, 8:29 PM CDT	Tornado Warning	OUN	Grant	31 min
May 24, 8:42 PM CDT	Tornado Warning	OUN	Kay	33 min
May 24, 8:59 PM CDT	Tornado Warning	OUN	Garfield, Grant, Kay, Noble	31 min
May 24, 9:14 PM CDT	Tornado Warning	OUN	Kay	31 min
May 24, 9:21 PM CDT	Tornado Warning	OUN	Grant	24 min
May 24, 9:30 PM CDT	Tornado Warning	OUN	Grant	30 min
May 24, 9:44 PM CDT	Tornado Warning	OUN	Grant	46 min
May 24, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	45 min
May 24, 9:47 PM CDT	Severe Thunderstorm Warning	OUN	Kay	58 min
May 24, 10:01 PM CDT	Flash Flood Warning	OUN	Grant, Kay	119 min
May 24, 10:08 PM CDT	Tornado Warning	OUN	Woods	37 min
May 24, 10:15 PM CDT	Tornado Warning	OUN	Alfalfa	30 min
May 24, 10:18 PM CDT	Severe Thunderstorm Warning	OUN	Woodward	42 min
May 24, 10:27 PM CDT	Tornado Warning	OUN	Kay	48 min
May 24, 10:31 PM CDT	Tornado Warning	OUN	Garfield, Grant	44 min
May 24, 10:37 PM CDT	Tornado Warning	OUN	Woods, Woodward	38 min
May 24, 10:43 PM CDT	Severe Thunderstorm Warning	OUN	Noble	47 min
May 24, 10:52 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	38 min
May 24, 11:05 PM CDT	Flash Flood Warning	OUN	Alfalfa	3 hr
May 24, 11:10 PM CDT	Tornado Warning	OUN	Alfalfa, Woods	35 min
May 24, 11:12 PM CDT	Severe Thunderstorm Warning	OUN	Kay	63 min
May 24, 11:14 PM CDT	Tornado Warning	OUN	Garfield	46 min
May 24, 11:17 PM CDT	Severe Thunderstorm Warning	OUN	Grant	58 min
May 24, 11:35 PM CDT	Tornado Warning	OUN	Noble	40 min
May 24, 11:37 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	53 min
May 24, 11:48 PM CDT	Tornado Warning	OUN	Alfalfa, Garfield, Major	27 min
May 24, 11:59 PM CDT	Flash Flood Warning	OUN	Alfalfa, Grant, Kay	3 hr
May 24, 11:59 PM CDT	Flash Flood Warning	OUN	Woods	3 hr
May 25, 12:10 AM CDT	Severe Thunderstorm Warning	OUN	Grant	50 min
May 25, 12:13 AM CDT	Tornado Warning	OUN	Garfield	47 min
May 25, 12:30 AM CDT	Severe Thunderstorm Warning	OUN	Harper	30 min
May 25, 12:37 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	23 min
May 25, 12:44 AM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	31 min
May 25, 1:00 AM CDT	Severe Thunderstorm Warning	OUN	Noble	45 min
May 25, 1:00 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	20 min
May 25, 1:14 AM CDT	Severe Thunderstorm Warning	OUN	Woods, Woodward	46 min
May 25, 1:36 AM CDT	Severe Thunderstorm Warning	OUN	Grant	39 min
May 25, 1:38 AM CDT	Tornado Warning	OUN	Alfalfa, Woods	37 min
May 25, 2:12 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	48 min
May 25, 2:45 AM CDT	Severe Thunderstorm Warning	OUN	Garfield	60 min
May 25, 2:48 AM CDT	Severe Thunderstorm Warning	OUN	Dewey	32 min
May 25, 3:00 AM CDT	Severe Thunderstorm Warning	OUN	Grant	45 min
May 25, 3:23 AM CDT	Severe Thunderstorm Warning	OUN	Dewey	47 min
May 25, 3:35 AM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble	60 min
May 25, 3:39 AM CDT	Severe Thunderstorm Warning	OUN	Blaine	46 min
May 25, 3:43 AM CDT	Severe Thunderstorm Warning	OUN	Custer	47 min
May 25, 4:08 AM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	62 min
May 25, 4:15 AM CDT	Tornado Warning	OUN	Blaine, Kingfisher	30 min
May 25, 4:32 AM CDT	Tornado Warning	OUN	Canadian	28 min
May 25, 4:45 AM CDT	Tornado Warning	OUN	Canadian, Kingfisher	30 min
May 25, 5:10 AM CDT	Tornado Warning	OUN	Canadian, Kingfisher, Logan, Oklahoma	50 min
May 25, 5:50 AM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	30 min
May 25, 6:03 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland	42 min
May 25, 6:10 AM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	35 min
May 25, 6:26 AM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	49 min
May 25, 7:11 AM CDT	Severe Thunderstorm Warning	OUN	Seminole	34 min

Nearby

Flash Flood Warnings in Oklahoma, 1998 Every flash flood 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; the sounding from the Mesonet's radiosonde archive.