Alert archive / Missouri / Flash Flood Warnings in 1998

Flash Flood Warning 98, NWS Springfield, MO

May 26, 1998Howell County, Missouri

NWS Springfield, MO issued this flash flood warning at May 26, 1998, 9:32 PM CDT for Howell County, Missouri. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 26, 1998, 9:32 PM CDT (02:32 UTC)
Expired: May 27, 1998, 1:35 AM CDT
In force: 4 hr
Issued by: NWS Springfield, MO
Area: Whole counties

County Howell County, MO

The radar

The Springfield radar (KSGF), 144 km from the middle of the area, began a volume at 02:33 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.5 hours before the alert went out and 171 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: 370 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 789 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSGF 270233
FFWSGF
MOC091-270635-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
932 PM CDT TUE MAY 26 1998

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN HOWELL COUNTY IN SOUTH CENTRAL MISSOURI

* UNTIL 135 AM CDT

* AT 926 PM DOPPLER RADAR INDICATED A FLASH FLOOD PRODUCING
  THUNDERSTORM OVER SOUTHWESTERN HOWELL COUNTY.  THIS STORM WAS
  MOVING EAST NORTHEAST AT 10 TO 15 MPH. DOPPLER RADAR ESTIMATED
  BETWEEN TWO AND THREE INCHES OF RAIN ACROSS SOUTHWESTERN HOWELL COUNTY
  SINCE 730 PM.

* AN ADDITIONAL ONE TO TWO INCHES OF RAIN WILL BE POSSIBLE ACROSS
  SOUTHERN HOWELL COUNTY THROUGH MIDNIGHT. THE HEAVY RAINFALL WILL
  CAUSE FLOODING TO DEVELOP AT LOW WATER CROSSINGS AND OTHER FLOOD
  PRONE AREAS IN SOUTHERN HOWELL COUNTY. ROADS THAT CROSS BENNETTS
  RIVER AND ITS TRIBUTARIES WILL BE ESPECIALLY VULNERABLE TO FLOODING.

BECAUSE OF THE HILLY TERRAIN ACROSS THE OZARKS...THERE ARE HUNDREDS OF
LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN.  DO
NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS.  FIND ALTERNATE ROUTES.

SUTTON/TAGGART

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 Springfield, MO wrote its last area forecast discussion before this flash flood warning went out at May 26, 2:00 PM CDT, 7 hours 32 minutes earlier.

Area forecast discussion, May 26, 2:00 PM CDT, 7 hours 32 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
200 PM CDT TUE MAY 26 1998...

WELL...QSTNRY FNT IS STRADDLED ALONG THE SRN PORTION OF CWA AND
WL BE THE FOCUS OF SHRA AND ISOLD TSRA ACRS CWA THIS AFTN AND TNGT.
H5 VORT MAX OVR CNTRL OK WL SLIDE TO THE NE AND CONTINUE A LOW POP
FOR TNGT.  LIGHT WINDS ACRS CWA ATTM AND WITH EXTENSIVE CLDNS
OVR CWA...TEMPS ARE RATHER COOL.

FCST PROB OF PD...POPS ANY FOG TNGT & HOW QUICK TEMPS WL RECOVER...

FAN WAS FAR SUPERIOR OVR THE NGM AND ETA YDY AND LOOKS THE BEST FOR
TNGT...AS H5 VORT MAX WL COMBINE WITH SFC FNT AND MID 60 DEWPOINTS TO
TRIGGER SOME SCT SHRA/TSRA TNGT.  WL USE FAN TNGT AND THEN
GO WITH THE ETA 2M TEMPS THEREAFTER FOR A WARMUP.
1ST PD RECOMMENDATIONS (FOR COORDINATION PURPOSES ONLY)

SE KS/JLN...DECREASING CLOUDINESS WITH PATCHY FOG DEVELOPING.
            LOW AROUND 60.  LIGHT WIND.

SGF.........MOSTLY CLOUDY WITH A 30 PERCENT CHANCE OF SHOWERS OR
THUNDERSTORMS.  LOW AROUND 60.  LIGHT WIND.

UNO/MO/AR BORDER COUNTIES...MOSTLY CLOUDY WITH A 40 PERCENT CHANCE
OF SHOWERS AND THUNDERSTORMS.  LOW AROUND 60.

VIH/AIZ.....DECREASING CLOUDINESS WITH AREAS OF FOG...LOCALLY DENSE.
LOW IN THE MID 50S.  LIGHT NORTHEAST WIND.

SGF BB 059/082 064/088 066 0432-
JLN BB 078/059 086/067 088 07210

GORDON

The office that day

Everything else NWS Springfield, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 10:26 PM CDT	Flash Flood Warning	SGF	Ozark	3 hr

Nearby

Flash Flood Warnings in Missouri, 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; radar from the NEXRAD Level II archive.