Alert archive / North Dakota / Tornado Warnings in 2001
Tornado Warning 30, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Jul 17, 2001, 6:59 PM CDT for Cass County, North Dakota. It was in force for 46 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
- Jul 17, 2001, 6:59 PM CDT (23:59 UTC)
- Expired
- Jul 17, 2001, 7:45 PM CDT
- In force
- 46 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Cass County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 91 km from the middle of the area, began a volume at 00:01 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 |
|---|---|---|---|
| Jul 17, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 12.0 hours before the alert went out and 229 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
- 1939 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 1392 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
565 WFUS53 KFGF 172359 TORFAR NDC017-180045- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 659 PM CDT TUE JUL 17 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA. * UNTIL 745 PM CDT. * AT 656 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 5 MILES SOUTHWEST OF DAVENPORT...OR ABOUT 22 MILES SOUTHWEST OF FARGO...MOVEMENT WAS TO THE EAST AT 15 MPH. * THE TORNADO WILL BE NEAR... DAVENPORT AT 700 PM CDT AND HORACE AT 705 PM CDT. THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY MORNING FOR NORTHWESTERN MINNESOTA. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT TUESDAY EVENING FOR EASTERN NORTH DAKOTA. LAT...LON 4677 9716 4666 9729 4665 9683 4681 9685 $$ DJK 08 NNNN
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Jul 17, 2:30 PM CDT, 4 hours 29 minutes earlier.
Area forecast discussion, Jul 17, 2:30 PM CDT, 4 hours 29 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 230 PM CDT TUE JUL 17 2001 .OVERVIEW... LATEST SFC MAP....MODELS DIFFER IN FIRST 24 HOURS...AND ARE SIMILAR THEREAFTER. AVN TARGEST THE NORTHERN 1/3 OF FA OVERNIGHT FOR CONVECTION...WITH ETA HITTING THE SOUTH THE HARDEST. I AM LEANING TOWARDS THE ETA WITH A WARMFRONT SETTING UP ACROSS THE SOUTH...SO WILL UTILIZE THIS PACKAGE. .SHORT TERM... PLENTY OF MOISTURE AND INSTABILITY CONTINUES OVER THE FA...WITH CONVECTIVE AVAILABLE POTENTIAL ENERGY (CAPE) TO 4500 J/KG IN SOUTH...TO AROUND 1500 IN NORTH WITH PRECIPITABLE WATERS TO AROUND 1.50-1.75 INCHES. PLENTY OF BOUNDARIES FROM RECENT CONVECTION...AND DEVELOPING WARMFRONT IN SOUTH SHOULD PROVIDE FOCUS FOR DEEP MOIST CONVECTION OVERNIGHT. 500 MB FLOW AROUND 40KT...WITH STRENGTHENING 850 MB LOW LEVEL JET OF AROUND 30KT IN SOUTH UNTIL 06Z. THIS SHOULD LEAD TO THUNDERSTORM DEVELOPMENT ACROSS MOST OF AREA. ANY STORMS MAY BECOME SEVERE WITH LARGE HAIL/DOWNBURST...WITH ISOLATED TORNADOES NOT OUT OF QUESTIONS NORTH OF FRONT IN SOUTH...WHERE ENERGY HELICITY INDEX/S OF AROUND 3. THIS IS HIGHLY DEPENDENT ON DEVELOPING BOUNDARY...AND WILL HAVE TO BE MONITORED CLOSELY. NEXT CONCERN IS FLASH FLOODING...WITH POTENTIAL FOR TRAINING ECHOES WITH FRONT BECOMING PARALLEL TO FRONT IN SOUTHERN 1/3 OF FA. WITH FFG GUIDANCE 1 HOUR VALUES OF 3 INCHES OR MORE IN SOUTH...AND AREAL COVERAGE STILL IN QUESTION...WILL HOLD ON FFA FOR NOW. EVENING CREW WILL HAVE TO MONITOR CONVECTIVE TRENDS IN CONJUNCTION WITH BOUNDARY THOUGH. EXPECT FOG FORMATION AGAIN AFTER MIDNIGHT...WITH WEAK SFC FLOW...AND TEMPS SIMILAR TO LAST NIGHT. .LONG TERM... SFC LOW LIFTS TO NEAR ABR AROUND 00Z THU...COUPLED WITH POTENT MID LEVEL SHORTWAVE. CAPE NEAR 4500 IN SOUTHEAST ND AND SUFFICIENT LIFT NEAR LOW SHOULD AGAIN PROVIDE FOCUS FOR AFTERNOON CONVECTION...WITH BEST CHANCE IN SOUTH. WITH BOUNDARIES STILL PRESENT AND AMPLE INSTABILITY ELSEWHERE...WILL CONTINUE SCATTERED POP MENTION. TEMPS TO BE SIMILAR TO TODAY/S READINGS...AND BE IN LOWER 90S SOUTH TO 85 NORTH. MCS IS POSSIBLE BY EVENING AS IT MOVES INTO WEST CENTRAL MN ON HEELS OF 35KT LOW LEVEL JET...WITH FLASH FLOODING ONCE AGAIN A POSSIBILITY. MORE STABLE AIR FILTER/S IN FOR THU...ALONG WITH A WEAK SFC HIGH AND MINIMAL CAPE. SO WILL KEEP THU DRY FOR NOW...WITH TEMPS SLIGHTLY COOLER WITH COOLING AT 850MB. .EXTENDED... LATEST MODEL TRENDS SHOW LITTLE OVERALL CHANGE IN THE MEAN 50H PATTERN INTO EARLY NEXT WEEK AS DISTURBANCES RIDE NORTHEAST INTO THE NRN PLAINS AROUND THE OKLAHOMA 50H HIGH. RETURN FLOW WILL SET UP FRIDAY AND AHEAD OF NEXT SYSTEM PROGGED FOR SATURDAY INTO EARLY SUNDAY. NOTICED 12Z AVN IS NOT NEARLY AS PROGRESSIVE WITH 50H SYSTEM IN CANADA SAT-SUN TIME PERIOD AS WAS THE 00Z MRF. THUS WILL LIKELY NOT SEE THE COOLER AND DRIER AIRMASS FROM CANADA EARLY NEXT AS ADVERTISED A FEW DAYS AGO. THIS TYPE OF PATTERN HARD TO BREAK. .FGF...NONE. KELLENBENZ/RIDDLE
In the hours before
Local storm report, Jul 17, 5:28 PM CDT, 1 hour 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
528 PM CDT TUE JUL 17 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0350 PM 7 W FINLEY ND 2 INCH HAIL
07/17/01 GRIGGS
0400 PM 7 SW FINLEY ND 2 INCH HAIL
07/17/01 STEELE GROUND WAS WHITE
0404 PM 4 E COOPERSTOWN ND 1 INCH HAIL
07/17/01 GRIGGS
0405 PM 5 W FINLEY ND 1.75 INCH HAIL
07/17/01 STEELE
0425 PM 3 N BEMIDJI MN 1.5 INCH HAIL
07/17/01 BELTRAMI
0428 PM 3 S FINLEY ND 1 INCH HAIL
07/17/01 STEELE
0435 PM 5 N HOPE ND 1.75 INCH HAIL
07/17/01 STEELE
0435 PM 3 S SALOL MN 1 INCH HAIL
07/17/01 ROSEAU
0440 PM 10 N GRYGLA MN .75 INCH HAIL
07/17/01 MARSHALL
0453 PM 4 W KELLIHER MN .75 INCH HAIL
07/17/01 BELTRAMI
NNNNThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 9:18 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy | 27 min |
| Jul 17, 3:40 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele | 50 min |
| Jul 17, 4:04 PM CDT | Tornado Warning | FGF | Griggs, Steele | 26 min |
| Jul 17, 4:30 PM CDT | Tornado Warning | FGF | Griggs, Steele | 45 min |
| Jul 17, 4:31 PM CDT | Flash Flood Warning | FGF | Griggs, Steele | 4 hr |
| Jul 17, 4:52 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 53 min |
| Jul 17, 5:16 PM CDT | Tornado Warning | FGF | Traill | 44 min |
| Jul 17, 5:20 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele | 40 min |
| Jul 17, 5:33 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 42 min |
| Jul 17, 6:03 PM CDT | Severe Thunderstorm Warning | FGF | Traill | 42 min |
| Jul 17, 6:07 PM CDT | Severe Thunderstorm Warning | FGF | Cass | 53 min |
| Jul 17, 6:11 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 64 min |
| Jul 17, 6:19 PM CDT | Tornado Warning | FGF | Cass | 26 min |
| Jul 17, 6:48 PM CDT | Tornado Warning | FGF | Richland | 42 min |
Nearby
Tornado Warnings in North Dakota, 2001Every tornado warning in 2001Tornadoes 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; radar from the NEXRAD Level II archive.