Alert archive / North Dakota / Tornado Warnings in 2005
Tornado Warning 15, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at May 20, 2005, 8:42 PM CDT for Cass County, North Dakota. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 20, 2005, 8:42 PM CDT (01:42 UTC)
- Expired
- May 20, 2005, 9:37 PM CDT
- In force
- 55 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
County Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 77 km from the middle of the area, began a volume at 01:42 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 20, 6:10 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.7 hours before the alert went out and 228 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
- 395 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 2239 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -51 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFGF 210142 TORFGF NDC017-210245- /O.NEW.KFGF.TO.W.0015.050521T0142Z-050521T0245Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 842 PM CDT FRI MAY 20 2005 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA * UNTIL 945 PM CDT * AT 837 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG ROTATION 6 MILES NORTHWEST OF ALICE...OR 19 MILES EAST OF VALLEY CITY...MOVING TO THE EAST AT 10 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... 7 MILES SOUTH OF BUFFALO AT 855 PM ALICE AT 900 PM EMBDEN AT 930 PM CHAFFEE AND 7 MILES SOUTH OF WHEATLAND AT 945 PM IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SATURDAY MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4692 9767 4674 9767 4669 9720 4697 9721 $$ JDS/TG
2 follow-up statements
000 WWUS53 KFGF 210201 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 900 PM CDT FRI MAY 20 2005 NDC017-210245- /O.CON.KFGF.TO.W.0015.000000T0000Z-050521T0245Z/ CASS ND- 900 PM CDT FRI MAY 20 2005 ...A TORNADO WARNING CONTINUES UNTIL 945 PM CDT FOR CENTRAL CASS COUNTY... AT 854 PM CDT...WEATHER SPOTTERS REPORTED A FUNNEL CLOUD. THE TORNADO WAS LOCATED 5 MILES NORTH OF ALICE...OR 21 MILES EAST OF VALLEY CITY...MOVING TO THE EAST AT 15 MPH. THE TORNADO WILL BE NEAR... EMBDEN BY 920 PM CDT... 9 MILES SOUTH OF WHEATLAND BY 930 PM CDT... CHAFFEE BY 935 PM CDT... IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SATURDAY MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4691 9763 4677 9766 4669 9716 4697 9717 $$ JDS/TG
000 WWUS53 KFGF 210237 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 937 PM CDT FRI MAY 20 2005 NDC017-210247- /O.CAN.KFGF.TO.W.0015.000000T0000Z-050521T0245Z/ CASS ND- 937 PM CDT FRI MAY 20 2005 ...THE TORNADO WARNING FOR CENTRAL CASS COUNTY IS CANCELLED... AT 933 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM LOCATED 4 MILES NORTH OF CHAFFEE...OR 25 MILES WEST OF FARGO...MOVING TO THE EAST AT 15 MPH. THE THUNDERSTORM HAS WEAKENED AND WAS NO LONGER CONSIDERED SEVERE. SO THE WARNING HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SATURDAY MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4691 9763 4677 9766 4669 9716 4697 9717 $$ JDS/TG
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 7:28 PM CDT | Tornado Warning | FGF | Richland | 30 min |
| May 20, 7:36 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass | 54 min |
| May 20, 8:23 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 67 min |
| May 20, 8:28 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 57 min |
| May 20, 8:30 PM CDT | Flash Flood Warning | FGF | Barnes, Cass | 12 hr |
| May 20, 9:43 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 40 min |
| May 21, 5:36 AM CDT | Severe Thunderstorm Warning | FGF | Eddy, Nelson | 39 min |
| May 21, 5:52 AM CDT | Severe Thunderstorm Warning | FGF | Griggs | 38 min |
Nearby
Tornado Warnings in North Dakota, 2005Every tornado warning in 2005Tornadoes in 2005
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.