Alert archive / North Dakota / Flash Flood Warnings in 1998
Flash Flood Warning 1, NWS Bismarck, ND
NWS Bismarck, ND issued this flash flood warning at Jun 18, 1998, 7:55 PM CDT for Sioux County, North Dakota. It was in force for 4 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
- Jun 18, 1998, 7:55 PM CDT (00:55 UTC)
- Expired
- Jun 18, 1998, 11:55 PM CDT
- In force
- 4 hr
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Sioux County, ND
The radar
The Bismarck radar (KBIS), 76 km from the middle of the area, began a volume at 00:55 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.9 hours before the alert went out and 78 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
- 558 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1272 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBIS 190056 FFWBIS NDC085-190455- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BISMARCK ND 755 PM CDT (655 PM MDT) THU JUN 18 1998 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN SIOUX COUNTY IN SOUTH CENTRAL NORTH DAKOTA * UNTIL 1055 PM MDT (1155 PM CDT) * BETWEEN 600 PM AND 800 PM CDT... AREA LAW ENFORCEMENT INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN NEAR BREIEN...MOVING SLOWLY NORTH. * FLOODING IS LIKELY ALONG PORTIONS OF HIGHWAY 6 DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! LM
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, Jun 18, 3:45 PM CDT, 4 hours 10 minutes before
NDZ020-034>036-042-045>047-050-182300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 345 PM CDT THU JUN 18 1998 ...WEAK FUNNELS HAVE BEEN REPORTED OVER SOUTH CENTRAL NORTH DAKOTA... SEVERAL FUNNEL CLOUDS WERE REPORTED ACROSS SOUTH CENTRAL NORTH DAKOTA THIS AFTERNOON. THESE WEAK FUNNEL CLOUDS ARE NOT ASSOCIATED WITH SEVERE THUNDERSTORMS. THEY ARE FORMED BY THUNDERSHOWERS OR RAIN SHOWERS WHEN UNIQUE METEOROLOGICAL CONDITIONS ARE MET. THESE FUNNELS GENERALLY DO NOT REACH THE GROUND AND ARE USUALLY SHORT LIVED. THEY HAVE...HOWEVER...ON RARE OCCASION TOUCHED THE GROUND AND CAUSED DAMAGE. BECAUSE OF THIS POSSIBILITY...SEEK SHELTER IF THESE WEAK FUNNELS ARE OBSERVED IN YOUR AREA. < FORS
Special weather statement, Jun 18, 3:45 PM CDT, 4 hours 10 minutes before
NDZ020-034>036-042-045>047-050-182300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 345 PM CDT THU JUN 18 1998 ...WEAK FUNNELS HAVE BEEN REPORTED OVER SOUTH CENTRAL NORTH DAKOTA... SEVERAL FUNNEL CLOUDS WERE REPORTED ACROSS SOUTH CENTRAL NORTH DAKOTA THIS AFTERNOON. THESE WEAK FUNNEL CLOUDS ARE NOT ASSOCIATED WITH SEVERE THUNDERSTORMS. THEY ARE FORMED BY THUNDERSHOWERS OR RAIN SHOWERS WHEN UNIQUE METEOROLOGICAL CONDITIONS ARE MET. THESE FUNNELS GENERALLY DO NOT REACH THE GROUND AND ARE USUALLY SHORT LIVED. THEY HAVE...HOWEVER...ON RARE OCCASION TOUCHED THE GROUND AND CAUSED DAMAGE. BECAUSE OF THIS POSSIBILITY...SEEK SHELTER IF THESE WEAK FUNNELS ARE OBSERVED IN YOUR AREA. < FORS
Nearby
Flash Flood Warnings in North Dakota, 1998Every flash flood warning in 1998
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.