Alert archive / North Dakota / Flash Flood Warnings in 1993
Flash Flood Warning 4, NWS Grand Forks, ND
NWS Grand Forks, ND issued this flash flood warning at Jul 24, 1993, 1:11 PM CDT for Cass County, North Dakota. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 24, 1993, 1:11 PM CDT (18:11 UTC)
- Expired
- Jul 24, 1993, 4:15 PM CDT
- In force
- 3 hr
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Cass County, ND
The nearest sounding before it
Aberdeen, SD (KHON), launched 12:00Z, 6.2 hours before the alert went out and 243 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 241814 FFWFAR NDC017-242115- BULLETIN - EBS ACTIVATION REQUESTED FLOOD WARNING NATIONAL WEATHER SERVICE FARGO ND 111 PM CDT SAT JUL 24 1993 THE NATIONAL WEATHER SERVICE IN FARGO HAS ISSUED A FLOOD WARNING EFFECTIVE UNTIL 415 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL NORTH DAKOTA ...CASS COUNTY AT 108 PM CDT RADAR INDICATED STRONG THUNDERSTORMS DUMPING 1 TO 2 INCHES OF RAIN PER HOURS MOVING ACROSS CENTRAL CASS COUNTY...WITH THE CASS COUNTY SHERIFF IN CASSELTON REPORTING 1.5 INCHES OF RAIN BETWEEN NOON AND 100 PM. IN ADDITION...FLOODING WAS IMMENENT ALONG COUNTY ROAD 10 JUST WEST OF WEST FARGO ND ALONG THE SHEYENNE DIVERSION. PERSONS IN THE NORTH AND WEST OF WEST FARGO AND IN THE HARWOOD AREA SHOULD BE ALERT FOR RAPID RISES IN WATER LEVELS IN THEIR AREA. ALSO...THOSE ALONG THE RUSH AND MAPLE RIVERS SHOULD BE ALERT FOR RAPID RISES IN WATER LEVELS. 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, 7:39 AM CDT, 5 hours 32 minutes before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-241345- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 740 AM CDT SAT JUL 24 1993 ...A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTHEAST AND SOUTH CENTRAL NORTH DAKOTA TODAY AND TONIGHT... AT 725 AM CDT...AN AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER EAST CENTRAL AND NORTHEAST NORTH DAKOTA. THE HEAVIEST RAIN WAS LOCATED FROM 40 MILES NORTH OF VALLEY CITY IN GRIGGS COUNTY NEAR THE COMMUNITY OF COOPERSTOWN...NORTHEAST TO GRAND FORKS IN NORTHEAST NORTH DAKOTA. THE HEAVY RAINS ARE OVER AREAS WITH SOIL ALREADY SATURATED FROM PREVIOUS STORMS. MOTORISTS SHOULD BE ALERT FOR CHANGING CONDITIONS. DO NOT CROSS FLOODED ROADWAYS. THE STORMS WERE MOVING NORTHEAST AT ABOUT 20 MPH. SOME COMMUNITIES IN PATH OF THE HEAVY RAIN INCLUDE HOPE..FINLEY...SHARON...HATTON AND GRAND FORKS. < ELSEWHERE...SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY RAIN CONTINLUED OVER NORTHEAST NORTH DAKOTA...FROM 25 MILES EAST OF DEVILS LAKE NORTHEAST TO THE INTERNATIONAL BORDER NEAR PEMBINA. THIS PRECIPITATION WAS ALSO MOVING NORTHEAST AT ABOUT 20 MPH. HW
Special weather statement, Jul 24, 9:00 AM CDT, 4 hours 11 minutes before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-241450- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 900 AM CDT SAT JUL 24 1993 ...A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTHEAST AND SOUTH CENTRAL NORTH DAKOTA TODAY AND TONIGHT... ...HEAVY RAINS PERSIST OVER EXTREME NORTHERN BARNES AND SOUTHERN GRIGGS COUNTIES OVERNIGHT... HEAVY RAIN HAVE PERSISTED OVER EXTREME NORTHERN BARNES AND SOUTHERN GRIGGS COUNTIES OVER EAST CENTRAL NORTH DAKOTA FOR THE LAST 4 TO 6 HOURS. AT 830 AM CDT RAINFALL HAD TOTALED OVER 3 INCHES AT WALUM NORTH DAKOTA... JUST SOUTH OF COOPERSTOWN. THUNDERSTORMS CONTINUE TO DEVELOP BETWEEN JAMESTOWN AND COOPERSTOWN AND MOVE OVER NORTHERN BARNES AND SOUTHERN GRIGGS COUNTIES THIS MORNING. THUNDERSTORMS WITH HEAVY RAIN WERE ALSO MOVING OVER STEEL AND GRAND FORKS COUNTIES...HOWEVER THESE STORMS HAVE ONLY BECOME PERSISTANT DURING THE PAST 2 TO 3 HOURS AND WERE NOT AS HEAVY. IF YOU LIVE IN GRIGGS...STEELE...OR NORTHERN BARNES COUNTIES KEEP AN EYE OUT FOR RAPIDLY RISING WATER LEVELS. LOW LAND FLOODING AND RAPID RISES IN RIVERS OR STREAMS COULD OCCUR WITHOUT ADVANCE NOTICE. IF YOU ARE IN AN AREA THAT IS FLOOD PRONE YOU SHOULD MOVE NOW TO HIGHER GROUND. CAMPERS SHOULD BE PARTICULARLY ALERT THIS MORNING AND GET TO A SAFE PLACE...DO NOT WAIT FOR WATER TO BEGIN RISING. SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY RAIN EXTENDED FROM 25 MILES NORTHEAST OF JAMESTOWN NORTH DAKOTA TO JUST NORTH OF THIEF RIVER FALLS MINNESOTA. MOVEMENT WAS NORTHEAST AT 20 MILES AN HOUR. D MORIN
Special weather statement, Jul 24, 9:53 AM CDT, 3 hours 18 minutes before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-241550- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE FARGO ND 950 AM CDT SAT JUL 24 1993 ...A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTHEAST AND SOUTH CENTRAL NORTH DAKOTA TODAY AND TONIGHT... ...FLASH FLOOD POTENTIAL IS HIGH OVER GRIGGS COUNTY OF EAST CENTRAL NORTH DAKOTA THIS MORNING... A STRONG THUNDERSTORM WITH VERY HEAVY RAIN WAS MOVING OVER SOUTHERN GRIGGS COUNTY AT 928 AM CDT...IN A AREA WHICH HAS ALREADY RECIEVED HEAVY RAINS OVERNIGHT. THE LIKELYHOOD OF RAPID FLOODING OF LOW AREAS...STREAMS AND RIVERS IS HIGH OVER THE SOUTHERN PART OF GRIGGS COUNTY AND POINTS SOUTHWARD INTO NORTHERN BARNES COUNTY. AS OF 945 AM CDT NO REPORTS OF FLOODING HAVE BEEN RECIEVED BY THIS OFFICE... . HOWEVER...IF YOU LIVE IN SOUTHERN GRIGGS OR NORTHERN BARNES COUNTIES KEEP AN EYE OUT FOR RAPIDLY RISING WATER LEVELS. RAPID RISES IN RIVERS OR STREAMS COULD OCCUR WITHOUT ADVANCE NOTICE. YOU SHOULD MOVE NOW TO HIGHER GROUND. CAMPERS SHOULD BE PARTICULARLY ALERT AND GET TO A SAFE PLACE...DO NOT WAIT FOR WATER TO BEGIN RISING. 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 AT 15 TO 20 MILES AN HOUR. D MORIN
Special weather statement, Jul 24, 10:52 AM CDT, 2 hours 19 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
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 10:25 AM CDT | Flash Flood Warning | FGF | Barnes, Griggs, Steele | 4 hr |
| Jul 24, 11:00 AM CDT | Flash Flood Warning | FGF | Grand Forks, Steele, Traill | 4 hr |
| Jul 24, 11:00 AM CDT | Flash Flood Warning | FGF | Barnes, Griggs | 4 hr |
| Jul 24, 4:30 PM CDT | Flash Flood Warning | FGF | Sargent | 3 hr |
| Jul 24, 6:30 PM CDT | Flash Flood Warning | FGF | Cass, Richland | 4 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.