Alert archive / Missouri / Flash Flood Warnings in 2002

Flash Flood Warning 71, NWS Springfield, MO

August 20, 2002Maries County, Phelps County, Missouri

NWS Springfield, MO issued this flash flood warning at Aug 20, 2002, 2:12 AM CDT for Maries County, Phelps County, Missouri. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 20, 2002, 2:12 AM CDT (07:12 UTC)
Expired: Aug 20, 2002, 8:00 AM CDT
In force: 6 hr
Issued by: NWS Springfield, MO
Area: Counties, with a storm outline in the text

Counties Maries County, MO, Phelps County, MO

The radar

The St Louis radar (KLSX), 125 km from the middle of the area, began a volume at 07:15 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, 7.2 hours before the alert went out and 214 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: 3042 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1610 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KSGF 200712
FFWSGF
MOC125-161-201300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
212 AM CDT TUE AUG 20 2002

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PHELPS COUNTY IN MISSOURI
  MARIES COUNTY IN MISSOURI

* UNTIL 800 AM CDT

* AT 206 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
  DOPPLER RADAR ESTIMATED OVER AN INCH OF ADDITIONAL RAINFALL HAS
  FALLEN ON TOP OF THE 3 TO 4 INCHES OF RAIN FROM EARLIER THIS
  EVENING.

* SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
  WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH
  FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING
  INCLUDE...ROLLA...VIENNA...ST. JAMES...NEWBURG AND DOOLITTLE.


ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN
THE WARNED AREA.

LAT...LON 3817 9154 3789 9154 3779 9154 3779 9181
          3761 9184 3761 9203 3802 9202 3803 9217
          3828 9219 3828 9166 3816 9165

LINDENBERG

2 follow-up statements

182 
RWUS32 KSGF 200959
FFSSGF
MOC125-161-201300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
459 AM CDT TUE AUG 20 2002

...FLASH FLOOD WARNING CONTINUES UNTIL 800 AM CDT FOR PHELPS AND
MARIES COUNTIES...

AT 455 AM...WEATHER SERVICE DOPPLER RADAR WAS SHOWING THAT MOST OF 
THE HEAVY RAIN WHICH FELL ACROSS PHELPS AND MARIES COUNTIES EARLIER 
TONIGHT HAS SHIFTED TO THE SOUTH.  LIGHT TO MODERATE RAINFALL WAS 
STILL OCCURRING OVER THE WARNED AREA.  DOPPLER RADAR ESTIMATED 
BETWEEN 4 AND 5 INCHES OF RAINFALL ACROSS PORTIONS OF PHELPS COUNTY.

ANY STANDING WATER SHOULD CONTINUE TO RECEDE DURING THE NEXT 3 HOURS 
THROUGH 8 AM...AS THE RAIN SHOULD COME TO AN END.  UNTIL THAT 
TIME...LOW WATER CROSSINGS WILL LIKELY REMAIN FLOODED AND DANGEROUS.

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

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 3829 9165 3816 9165 3816 9153 3781 9155
          3781 9184 3761 9184 3761 9204 3787 9203
          3801 9204 3802 9218 3829 9219

LINDENBERG

103 
RWUS32 KSGF 201214
FFSSGF
MOC125-161-201230-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
714 AM CDT TUE AUG 20 2002

...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT FOR PHELPS AND MARIES
COUNTIES HAS BEEN CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LINDENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 7:25 PM CDT	Severe Thunderstorm Warning	SGF	Wright	50 min
Aug 19, 7:55 PM CDT	Severe Thunderstorm Warning	SGF	Pulaski	50 min
Aug 19, 8:05 PM CDT	Severe Thunderstorm Warning	SGF	Polk	40 min
Aug 19, 8:14 PM CDT	Severe Thunderstorm Warning	SGF	Webster	46 min
Aug 19, 8:34 PM CDT	Severe Thunderstorm Warning	SGF	Phelps	41 min
Aug 19, 8:44 PM CDT	Severe Thunderstorm Warning	SGF	Dallas, Polk	46 min
Aug 19, 9:16 PM CDT	Severe Thunderstorm Warning	SGF	Greene	44 min
Aug 19, 9:30 PM CDT	Severe Thunderstorm Warning	SGF	Dade, Polk	45 min
Aug 19, 9:33 PM CDT	Severe Thunderstorm Warning	SGF	Dent	42 min
Aug 19, 9:38 PM CDT	Severe Thunderstorm Warning	SGF	Phelps	37 min
Aug 19, 9:56 PM CDT	Tornado Warning	SGF	Dent	49 min
Aug 19, 10:04 PM CDT	Flash Flood Warning	SGF	Dent	6 hr
Aug 20, 2:20 AM CDT	Flash Flood Warning	SGF	Benton, Morgan	6 hr

Nearby

Flash Flood Warnings in Missouri, 2002 Every flash flood warning in 2002

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.