Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 103, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 17, 2001, 4:52 PM CDT for Traill County, North Dakota. It was in force for 53 min. 2 reports came from 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, with what was reported inside it.
The facts
- Issued
- Jul 17, 2001, 4:52 PM CDT (21:52 UTC)
- Expired
- Jul 17, 2001, 5:45 PM CDT
- In force
- 53 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Traill County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 9 km from the middle of the area, began a volume at 22:00 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 17, 5:45 PM CDT | Hail 0.75 | Clifford, ND | |
| Jul 17, 5:45 PM CDT | Hail 0.75 | Clifford, ND |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
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
Bismarck Municip, ND (KBIS), launched 12:00Z, 9.9 hours before the alert went out and 266 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
- 1827 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 1544 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 172152 SVRFAR NDC091-097-172245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 452 PM CDT TUE JUL 17 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA. * UNTIL 545 PM CDT. * AT 450 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES WEST OF ROSEVILLE...OR ABOUT 38 MILES SOUTHWEST OF GRAND FORKS...MOVEMENT WAS TO THE EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ROSEVILLE AT 500 PM CDT... MAYVILLE AT 505 PM CDT... BLANCHARD AT 520 PM CDT AND HILLSBORO AT 530 PM CDT. THIS THUNDERSTORM HAS A HISTORY OF GOLF BALL SIZE HAIL. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 8PM CDT TUESDAY EVENING FOR EASTERN NORTH DAKOTA. LAT...LON 4754 9761 4737 9764 4726 9690 4751 9690 $$ DJK 08 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 Jul 17, 2:30 PM CDT, 2 hours 22 minutes earlier.
Area forecast discussion, Jul 17, 2:30 PM CDT, 2 hours 22 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
The 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, 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 |
| Jul 17, 6:59 PM CDT | Tornado Warning | FGF | Cass | 46 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.