Alert archive / North Dakota / Flash Flood Warnings in 1993

Flash Flood Warning 5, NWS Grand Forks, ND

July 24, 1993Sargent County, North Dakota

NWS Grand Forks, ND issued this flash flood warning at Jul 24, 1993, 4:30 PM CDT for Sargent County, North Dakota. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 24, 1993, 4:30 PM CDT (21:30 UTC)
Expired
Jul 24, 1993, 7:15 PM CDT
In force
3 hr
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Sargent County, ND

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 9.5 hours before the alert went out and 147 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-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 1993-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1475 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 1993-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1475 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
790 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
77 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 
TTAA00 KFAR 242131
FFWFAR
MNC027-NDC081-250015-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE FARGO ND
430 PM CDT SAT JUL 24 1993
 
THE NATIONAL WEATHER SERVICE IN FARGO HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL 700 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST MINNESOTA
 
   ...EASTERN CLAY COUNTY
 
 
IN SOUTHEAST NORTH DAKOTA
 
   ...SARGENT COUNTY
 
AT 430 PM CDT THE COOPERATIVE OBSERVER AT CAYUGA REPORTED 1.60 INCHES OF
RAIN IN THE LAST SEVERAL HOURS...WITH UN OFFICIAL REPORTS OF 6 INCHES OF
RAIN 4 MILES SOUTH OF CAYUGA. RADAR AND SATELLITE ESTIMATES SHOW A LARGE
AREA OF 2 TO 4 INCH RAINFALLS IN THAT AREA WITH STRONG THUNDERSTORMS
MOVING INTO SARGENT COUNTY.
 
IN ADDITION...FLOODING HAS BEEN REPORTED IN EASTERN CLAY COUNTY IN AND
AROUND HAWLEY MINNESOTA.  HIGHWAY 10 IN THE HAWLEY AREA IS REPORTED
UNDERWATER.  THE STRONG THUNDERSTORMS WERE SLOWLY MOVING EAST OF THAT
AREA AS OF 430 PM CDT.
 
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.  CAMPERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.
EWENS

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.

In the hours before

Special weather statement, Jul 24, 10:52 AM CDT, 5 hours 38 minutes before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-241650-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
1050 AM CDT SAT JUL 24 1993

...FLASH FLOOD WARNING UNTIL 200 PM CDT FOR GRIGGS...STEELE AND
   NORTHERN BARNES COUNTIES OF EAST CENTRAL NORTH DAKOTA..

...VERY HEAVY RAIN CONTINUES OVER THE WARNED AREA...

STRONG THUNDERSTORMS WITH VERY HEAVY RAIN REMAIN OVER GRIGGS AND STEELE
COUNTIES AND FLOODING IS LIKELY IN THOSE COUNTIES AND COMMUNITIES
DOWN STREAM.

AT 1040 AM CDT AN UNCONFIRMED READING OF OVER 10 INCHES OF RAINFALL IN THE
FINLEY NORTH DAKOTA AREA WAS RECIEVED BY THIS OFFICE.

THIS IS A DANGEROUS SITUATION...MOVE TO HIGHER GROUND IF YOU AREA IN THE
AFFECTED AREA.  PERSONS IN THE TRAILL AND  GRAND FORKS COUNTIES SHOULD
BE MAKING PREPARATIONS TO ALSO MOVE TO SAFETY.
.
THE STORMS ARE MOVING NORTHEAST AT 15 TO 20 MPH AND WILL REACH
TRAILL AND GRAND FORKS  COUNTIES OVER THE NEXT ONE TO TWO HOURS.

OTHER SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY RAIN...CONTINUED OVER
MUCH OF NORTHEAST AND EAST CENTRAL NORTH DAKOTA...AND WERE DEVELOPING
OVER SOUTHEAST NORTH DAKOTA.

MOVEMENT OF ALL THE SHOWERS AND THUNDERSTORMS WAS NORTHEAST ATL 15 TO
20 MILES AN HOUR.

D MORIN
Special weather statement, Jul 24, 3:11 PM CDT, 1 hour 19 minutes before
NDZ015-016-017-018-MNZ001-006-007-010-250000-

SPECIAL WEATHER STATEMENT FOR FLOODING
NATIONAL WEATHER SERVICE FARGO ND
310 PM CDT SAT JUL 24 1993

...FLOOD WARNING ENDED AT 300 PM CDT GRIGGS...STEELE...TRAILL AND GRAND
FORKS COUNTIES...

...FLOOD WARNING EXPIRES AT 415 PM CDT FOR CASS COUNTY...

HEAVY RAINS HAVE MOVED INTO NORTHWEST MINNESOTA AS OF 300 PM CDT...
HOWEVER MORE INTENSE THUNDERSTORMS WERE DEVELOPING OVER SOUTHEAST NORTH
DAKOTA AND NORTHEAST SOUTH DAKOTA.  ALTHOUGH THE FLOODING RAINS HAVE
TEMPORARLY ENDED...FLOODING WAS REPORTED WIDESPREAD ACROSS GRIGGS..
STEELE AND PART OF CASS COUNTIES ESPECIALLY IN OPEN COUNTY AND LOW SPOTS
NEAR RIVERS AND STREAMS.

FLOODING WILL CONTINUE ESPECIALLY OVER EASTERN GRIGGS...MUCH OF STEELE
AND PARTS OF CASS COUNTY.  IN THE WEST FARGO AREA AND HARWOOD AREA OF
CASS COUNTY FLOODING IS REPORTED WITH SOME EVACUATIONS UNDERWAY.

THE STRONG THUNDERSTORMS DEVELOPING OVER NORTHEAST SOUTH DAKOTA AND
SOUTHEAST NORTH DAKOTA ARE FORECAST TO MOVE INTO PARTS OF EAST CENTRAL
NORTH DAKOTA BY LATE AFTERNOON AND THROUGH THE EVENING.  ANY RAINFALL
WILL CAUSE ADDITIONAL FLOODING ESPECIALLY IN RURAL CASS COUNTY...
HOWEVER URBAN FLOODING IS ALSO A POSSIBILITY.

STAY TUNED TO RADIO AND T.V. AS WELL AS NOAA WEATHER RADIO FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.
EWENS
Special weather statement, Jul 24, 3:46 PM CDT, 44 minutes before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-242150-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
350 PM CDT SAT JUL 24 1993

...FLASH FLOOD WARNING FOR CASS COUNTY EXPIRES AT 415 PM CDT...

...ATMOSPHERE SETTING UP FOR NEXT ROUND OF HEAVY RAIN...

AT 326 PM CDT...STRONG THUNDERSTORMS WITH VERY HEAVY RAIN WERE DEVELOPING
OVER NORTHEAST SOUTH DAKOTA AND BEGINNING TO CROSS INTO SOUTHEAST
NORTH DAKOTA.

STORMS EXTENDED FROM ABERDEEN SOUTH DAKOTA TO THE LIDGERWOOD AREA OF
EXTREME SOUTHEAST NORTH DAKOTA.

MODERATE TO HEAVY RAIN WAS REPORTED NEAR LIDGERWOOD IN THE NEARBY TOWNS
OF MILNOR AND RUTLAND.

THESE THUNDERSTORMS WERE MOVING NORTH AT 15 MILES AN HOUR AND WILL
MOVE TOWARD ALREADY FLOODED AREAS OF SOUTHEAST NORTH DAKOTA OVER THE
NEXT ONE TO TWO HOURS.  THE STORMS WILL REACH THE FARGO/MOORHEAD AREA
BETWEEN 600 AND 630 PM CDT.  THE INFLUENCE OF THE THESE STORMS...THE
VERY HEAVY RAIN IN PARTICILAR...WILL BE FELT AS FAR WEST OF AS
VALLEY CITY NORTH DAKOTA AT THAT TIME.

MANY ROADWAYS IN OUR AREA ARE UNDER WATER.  DO NOT VENTURE OUT UNLESS
THERE IS AN EMERGENCY.

STAY ALERT FOR THE POSSIBLITY OF RAPIDLY RISING WATER IF YOU ARE IN (A
LOW LYING AREA OR NEAR A STREAM OR RIVER.  YOU SHOULD GO TO A SAFE
PLACE NOW.  CHECK YOUR BASEMENT SUMP PUMPS AND DRAINAGE AROUND YOUR
HOME TO BE SURE IT IS IN GOOD WORKING ORDER.

D MORIN

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 24, 10:25 AM CDTFlash Flood WarningFGFBarnes, Griggs, Steele4 hr
Jul 24, 11:00 AM CDTFlash Flood WarningFGFGrand Forks, Steele, Traill4 hr
Jul 24, 11:00 AM CDTFlash Flood WarningFGFBarnes, Griggs4 hr
Jul 24, 1:11 PM CDTFlash Flood WarningFGFCass3 hr
Jul 24, 6:30 PM CDTFlash Flood WarningFGFCass, Richland4 hr

Nearby

Flash Flood Warnings in North Dakota, 1993Every flash flood warning in 1993

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.