Alert archive / North Dakota / Flash Flood Warnings in 1999
Flash Flood Warning 4, NWS Grand Forks, ND
NWS Grand Forks, ND issued this flash flood warning at Jul 22, 1999, 8:08 PM CDT for Cass County, North Dakota. It was in force for 3 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
- Jul 22, 1999, 8:08 PM CDT (01:08 UTC)
- Expired
- Jul 22, 1999, 11:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
County Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 66 km from the middle of the area, began a volume at 01:09 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
Aberdeen, SD (KABR), launched 00:00Z, 1.1 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
- 2442 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1803 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFAR 230110 FFWFAR NDC017-230400- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 808 PM CDT THU JUL 22 1999 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHWESTERN CASS COUNTY AND SOUTHEAST BARNES COUNTY IN SOUTHEASTERN NORTH DAKOTA * UNTIL 1100 PM CDT * AT 750 PM CDT...DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS PRODUCING HEAVY RAIN FROM JUST SOUTH OF FINGAL TO NORTH OF LEONARD NORTH DAKOTA OR FROM 20 MILES SOUTHEAST OF VALLEY CITY TO 25 MILES SOUTHWEST OF FARGO. MOVEMENT WAS TO THE EAST AT 10 MPH. * RADAR ESTIMATED UP TO FIVE INCHES OF RAIN HAS FALLEN IN FAR SOUTHWEST CASS COUNTY SINCE 5 PM. THE TOWNS OF LUCCA AND ALICE WILL BE AFFECTED BY THIS WARNING AND ESPECIALLY THOSE ALONG THE MAPLE RIVER IN SOUTHWEST CASS COUNTY. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE INTO WATER OF UNKNOWN D\EPTH. ONE OR TWO FEET OF WATER WILL FLOAT MOST CARS DOWNSTREAM. HOPPES
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 Grand Forks, ND wrote its last area forecast discussion before this flash flood warning went out at Jul 22, 3:10 PM CDT, 4 hours 58 minutes earlier.
Area forecast discussion, Jul 22, 3:10 PM CDT, 4 hours 58 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 310 PM CDT WED JUL 22 1999 FORECAST PROBLEM FOR TONIGHT IS PCPN. LATEST VIS SATELLITE IMAGERY HAS AC AND CI WITH EMBEDDED TSRA ALONG SPEED CONVERGENCE BOUNDARY THROUGH CENTER OF CWFA. LATEST ADAP HAS LIS OF AROUND -10 WITH A SFC MOISTURE CONVERENCE MAX NEAR DVL AND ABOUT A 2 DEGREE CAP. MODELS SIMILAR IN TREATMENT OF SHORTWAVE AS IT LIFTS N FROM SD THROUGH ND SIDE OF CWFA BY 06Z. STILL PREFER ETA SOLUTION OVER OTHER MODELS SINCE IT HAS HAD THE BEST ACCURACY AND CONSISTENCY OVER THE PAST FEW DAYS. POTENTIAL REMAINS FOR SVR OVER CWFA AS THE WAVE MOVES THROUGH. THEREFORE...WILL LEAVE EVENING TSRA WITH POSSIBLE SVR IN FORECAST FOR THIS EVENING. FORECAST PROBLEM FOR 2ND THROUGH 4TH PERIOD IS TEMPS. MODELS CONTINUE TO KEEP 500MB RIDGE OVER NORTHERN PLAINS WITH SHORTWAVES RIDING THROUGH. HOWEVER...BEST UVV REMAINS W OF CWFA AS A LOW PRESSURE SYSTEM DEVELOPS IN E MT BY SAT. GOOD WAA REMAINS AHEAD OF THIS NEXT LOW PRESSURE SYSTEM...KEEPING HOT AND HUMID CONDITIONS OVER THE CWFA INTO SAT. EXTENDED FORECAST...AFTER VERY WARM AND SULTRY SATURDAY...EXPECT SOUTHWARD EXPANDING WESTERLIES TO SWEEP FAIRLY SIGNIFICANT COLD FRONT ACROSS THE REGION SUNDAY ACCOMPANIED BY THE POTENTIAL FOR RATHER HEFTY THUNDERSTORMS. COOLER AND DRIER CONDITIONS SHOULD THEN FOLLOW IN ITS WAKE FOR MONDAY AND TUESDAY. .FGF...NONE NG/BERG
Hazardous weather outlook, Jul 22, 11:31 AM CDT, 8 hours 37 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052-053-221915- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1131 AM CDT THU JUL 22 1999 ...SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN NORTH DAKOTA AND NORTHWEST AND WEST CENTRAL MINNESOTA THIS AFTERNOON AND EVENING... SYNOPSIS...UNSTABLE AIR WILL REMAIN IN PLACE FOR THE REMAINDER OF THE AFTERNOON...WITH DEW POINTS IN THE LOWER 70S AND TEMPERATURES OF AROUND 90. AN UPPER LEVEL TROUGH AND WEAK SURFACE COLD FRONT WILL APPROACH THE REGION THIS AFTERNOON...AND PASS THROUGH THE AREA BY MIDNIGHT. AREA OF CONCERN...A MODERATE RISK OF SEVERE THUNDERSTORMS IS FORECAST FOR AREAS OF EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA FROM COOPERSTOWN TO MAYVILLE TO BEMIDJI AND POINTS NORTH. SOUTH OF THIS LINE A SLIGHT CHANCE OF SEVERE THUNDERSTORMS IS FORECAST. TIME...BETWEEN 4 PM AND MIDNIGHT. TYPE OF HAZARD...MAINLY STRAIGHT LINE WIND DAMAGE...LARGE HAIL AND ISOLATED TORNADOES. KELLENBENZ/BRAZZELL
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 7:06 PM CDT | Tornado Warning | FGF | Cass | 34 min |
| Jul 22, 7:37 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 48 min |
| Jul 22, 7:44 PM CDT | Severe Thunderstorm Warning | FGF | Ransom | 36 min |
| Jul 22, 8:00 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 35 min |
| Jul 22, 9:10 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 35 min |
| Jul 23, 12:10 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks | 35 min |
Nearby
Flash Flood Warnings in North Dakota, 1999Every flash flood warning in 1999
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.