Alert archive / North Dakota / Flash Flood Warnings in 1987
Flash Flood Warning 1, NWS Bismarck, ND
NWS Bismarck, ND issued this flash flood warning at May 23, 1987, 11:58 PM MDT for Grant County, Morton County, Sioux County, North Dakota. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 23, 1987, 11:58 PM MDT (05:58 UTC)
- Expired
- May 24, 1987, 3:00 AM MDT
- In force
- 3 hr
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
Counties Grant County, ND, Morton County, ND, Sioux County, ND
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 6.0 hours before the alert went out and 63 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
- 348 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1042 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBIS 240558 FFWBIS NDC085-059-037-240900- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BISMARCK ND 1158 PM MDT SAT MAY 23 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 300 AM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTH CENTRAL NORTH DAKOTA...NORTHERN SIOUX...SOUTHERN MORTON AND SOUTHERN GRANT HEAVIER RAINS IN THE CEDAR CREEK AND CANNONBALL RIVER BASINS HAVE CAUSED FLOODING ON THE CANNONBALL RIVER. THE SIOUX COUNTY SHERIFFS DEPARTMENT REPORTED THE COUNTY ROAD SOUTH OF SHIELDS WASHED OUT. ALSO PORTIONS OF HIGHWAY 6 WAS UNDER WATER. STAY OUT OF DRY CREEK BEDS AND LOW LYING AREAS. FLASH FLOODS CAN OCCUR WITH LITTLE OR NO ADVANCE WARNING. DO NOT ATTEMPT TO DRIVE OVER ROADS COVERED BY FLOOD WATERS.
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, May 23, 6:02 PM MDT, 5 hours 56 minutes before
KBIS 212040 SPECIAL WEATHER STATEMENT...CORRECTION...FOR TIMES... NATIONAL WEATHER SERVICE BISMARCK ND 655 PM CDT SAT MAY 23 1987 AT 650 PM CDT NUMEROUS THUNDERSTORMS HAD DEVELOPED OVER SOUTH CENTRAL NORTH DAKOTA. THESE THUNDERSTORMS HAVE INCREASED IN INTENSITY AS THEY CONTINUED TO MOVE NORTH AT 15 MILES AN HOUR. SMALL HAIL...GUSTY WINDS AND BRIEF HEAVY RAIN ARE POSSIBLE WITH THESE THUNDERSTORMS. AT 645 PM CDT A FUNNEL CLOUD WAS SIGHTED 5 MILES NORTHWEST OF SELFRIDGE NORTH DAKOTA...50 MILES SOUTH SOUTHWEST OF BISMARCK.
Special weather statement, May 23, 6:43 PM MDT, 5 hours 15 minutes before
KBIS 212040 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 740 PM CDT SAT MAY 23 1987 AT 735 PM CDT THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL NORTH DAKOTA. THE MOST INTENSE ACTIVITY WAS LOCATED IN NORTHERN SIOUX COUNTY OF NORTH DAKOTA...40 MILES SOUTH OF BISMARCK. THESE THUNDERSTORMS WERE MOVING NORTH AT 15 MILES AN HOUR. SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE POSSIBLE WITH THESE THUNDERSTORMS. AT 710 PM CDT...1/4 INCH HAIL WAS REPORTED AT DICKINSON NORTH DAKOTA. IF THREATENING WEATHER APPROACHES TAKE COVER IMMEDIATELY.
Special weather statement, May 23, 9:53 PM MDT, 2 hours 5 minutes before
KBIS 212040 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 1050 PM CDT SAT MAY 23 1987 AT 1040 PM CDT A LARGE AREA OF SHOWERS AND A FEW THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL NORTH DAKOTA. THE STRONGEST ACTIVITY WAS LOCATED IN CENTRAL EMMONS COUNTY OF NORTH DAKOTA 45 MILES SOUTHEAST OF BISMARCK. THIS ACTIVITY CONTINUED TO MOVE NORTHEAST AT 20 MILES AN HOUR. SMALL HAIL...GUSTY WINDS AND HEAVY RAIN ARE POSSIBLE WITH THESE THUNDERSTORMS. DURING THE LATE AFTERNOON AND EVENING HOURS...HEAVY RAIN OCCURRED OVER MUCH OF WESTERN AND CENTRAL SIOUX AND EASTERN GRANT COUNTIES OF NORTH DAKOTA..50 MILES SOUTHEAST OF BISMARCK. CREEKS WERE RUNNING FULL BUT NO FLOODING WAS REPORTED. ANOTHER AREA OF THUNDERSTORMS HAS DEVELOPED OVER WESTERN SOUTH DAKOTA AN WILL MOVE INTO SOUTH CENTRAL NORTH DAKOTA BY SUNDAY MORNING. SOME MINOR FLOODING OF SMALL STREAMS IS POSSIBLE IN SOUTH CENTRAL NORTH DAKOTA IF ADDITIONAL HEAVY pRAIN OCCURS LATER TONIGHT.
Nearby
Flash Flood Warnings in North Dakota, 1987Every flash flood warning in 1987
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.