Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 58, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 18, 2001, 12:27 AM CDT for Cass County, North Dakota. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jun 18, 2001, 12:27 AM CDT (05:27 UTC)
- Expired
- Jun 18, 2001, 1:15 AM CDT
- In force
- 48 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Cass County, ND
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 5.5 hours before the alert went out and 223 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
- 19 J/kg
- Mixed-layer CIN
- -453 J/kg
- Mixed-layer LCL
- 1102 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 520 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
926 WUUS53 KFGF 180527 SVRFAR NDC017-180615- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 1227 AM CDT MON JUN 18 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 115 AM CDT * AT 1224 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES SOUTHWEST OF ALICE...OR ABOUT 26 MILES SOUTHEAST OF VALLEY CITY...MOVEMENT WAS TO THE NORTHEAST AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ALICE AT 1235 AM CDT... EMBDEN AT 1240 AM CDT... CHAFFEE AT 1245 AM CDT... DURBIN AT 1255 AM CDT... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4678 9767 4664 9755 4666 9686 4698 9699 $$ DJK NNNN
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 17, 8:20 PM CDT, 4 hours 7 minutes earlier.
Area forecast discussion, Jun 17, 8:20 PM CDT, 4 hours 7 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 820 PM CDT SUN JUN 17 2001 FORECAST CHALLENGE OVERNIGHT WILL BE CONVECTION SFC LOW IS SLOWLY DEEPENING THIS EVENING OVER SOUTHWEST SD...WITH SFC WARMFRONT EXTENDING EAST INTO SOUTHERN MN. TWO CONVECTIVE CLUSTERS ARE DEVELOPING ACROSS ND AND SD ATTM...IN RESPONSE TO STRENGTHENING LOW LEVEL JET AND 55KT 500 MB SPEED MAX. IMPRESSIVE MOISTURE ADVECTION WILL COMMENCE ACROSS SOUTHEAST ND AFTER 03Z...WITH 30KT 925MB JET...AS DEWPOINTS AT 850MB INCREASE FROM AROUND +2C AT 00Z TO +12C AT 06Z. SHOWALTERS ALSO INCREASE TO AROUND -5C IN SOUTHEAST ND AROUND 06Z. FURTHER NORTH...MOISTURE ADVECTION ALSO LOOKS FAIRLY IMPRESSIVE...WITH MORE DYNAMICS CLOSER TO 100KT SPEED MAX AT 300MB AND ASSOCIATED UPPER LEVEL DIVERGENCE. IN ADDITION...A COLD FRONT NOW ENTERING WESTERN ND WILL ADD SOME SFC BASED CONVERGENCE AIDING THUNDERSTORM DEVELOPMENT INTO THE RED RIVER VALLEY AROUND 06Z. STORMS WILL DEVELOP LATE INTO THE NORTHEAST FA...AS INSTABILITY HERE IS ALSO WEAKER THAN REST OF FA. WILL THEREFORE GO SCATTERED STORMS HERE LATE...WITH LIKELY POPS ELSEWHERE. SEVERE THREAT IS ALSO POSSIBLE...ESPECIALLY ALONG A VALLEY CITY TO FFM LINE NEAR BEST INSTABILITY AND MOISTURE. DON/T FEEL THAT THIS WARRANTS A MENTION IN ZONES THOUGH...WITH BEST LOW LEVEL JET FOCUSED INTO SOUTHERN MN/IOWA AFTER 06Z. A FEW SEVERE HAIL/WIND REPORTS ARE POSSIBLE LATER TONIGHT AS STRONG MCS MOVES ACROSS SOUTHEAST ND INTO WEST CENTRAL MN AFTER 04Z...BUT NOT ENOUGH TO WARRANT A MENTION IN THE ZONES. REFER TO NEW SWODY1 FOR FURTHER DISCUSSION. .FGF...NONE. KELLENBENZ
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 12:05 AM CDT | Severe Thunderstorm Warning | FGF | Ransom | 40 min |
| Jun 18, 1:37 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 38 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2001Every severe thunderstorm warning in 2001
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.