Alert archive / North Dakota / Tornado Warnings in 2007
Tornado Warning 4, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at May 18, 2007, 6:43 PM CDT for Griggs County, Steele County, North Dakota. It was in force for 62 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 18, 2007, 6:43 PM CDT (23:43 UTC)
- Expired
- May 18, 2007, 7:45 PM CDT
- In force
- 62 min
- Issued by
- NWS Grand Forks, ND
- Area
- Counties, with a storm outline in the text
Counties Griggs County, ND, Steele County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 52 km from the middle of the area, began a volume at 23:47 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 |
|---|---|---|---|
| May 18, 6:52 PM CDT | TORNADO | 3 E Walum, ND | TORNADO ON THE GROUND 8N OF LUVERNE ON GRIGGS SIDE OF THE COUNTY LINE REPORTED BY TRAINED SPOTTER AT 652 PM. REPORT RELAYED BY STEELE COUNTY LAW ENFORECEMENT. |
| May 18, 7:00 PM CDT | HAIL 0.88 | 3 N Luverne, ND |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 18, 3:43 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.7 hours before the alert went out and 217 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
- 362 J/kg
- Mixed-layer CIN
- -435 J/kg
- Mixed-layer LCL
- 1771 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KFGF 182343 TORFGF NDC039-091-190045- /O.NEW.KFGF.TO.W.0004.070518T2343Z-070519T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 643 PM CDT FRI MAY 18 2007 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA... SOUTHERN STEELE COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 745 PM CDT * AT 638 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES NORTH OF LUVERNE...OR 29 MILES NORTH OF VALLEY CITY...MOVING TO THE EAST AT 20 MPH. * THE TORNADO WILL BE NEAR... BLABON AT 700 PM CDT... HOPE AT 715 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 1100 PM CDT FRIDAY EVENING FOR NORTHWEST MINNESOTA. LAT...LON 4748 9818 4724 9823 4725 9776 4748 9755 $$ JK/BB
3 follow-up statements
000 WWUS53 KFGF 182357 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 655 PM CDT FRI MAY 18 2007 NDC039-091-190045- /O.CON.KFGF.TO.W.0004.000000T0000Z-070519T0045Z/ GRIGGS ND-STEELE ND- 655 PM CDT FRI MAY 18 2007 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR SOUTHEASTERN GRIGGS AND SOUTHWESTERN STEELE COUNTIES... AT 652 PM CDT...A TORNADO WAS SPOTTED 3 MILES EAST OF WALLUM. ...MOVING TO THE EAST AT 15 MPH. THE TORNADO WILL CONTINUE ALONG THE GRIGGS...BARNES AND STEELE COUNTY LINE NORTH OF DAZEY AND SIBLEY. * THE TORNADO WILL BE NEAR... RURAL SOUTHEASTERN GRIGGS COUNTY AT 710 PM CDT RURAL SOUTHWESTERN STEELE COUNTY AT 720 PM CDT IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FRIDAY EVENING FOR NORTHWEST MINNESOTA. LAT...LON 4739 9821 4725 9823 4725 9776 4731 9784 $$ DK
000 WWUS53 KFGF 190019 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 719 PM CDT FRI MAY 18 2007 NDC039-091-190045- /O.CON.KFGF.TO.W.0004.000000T0000Z-070519T0045Z/ GRIGGS ND-STEELE ND- 719 PM CDT FRI MAY 18 2007 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR SOUTHEASTERN GRIGGS AND SOUTHWESTERN STEELE COUNTIES... AT 718 PM CDT...DOPPLER RADAR INDICATED A TORNADO. THE TORNADO WAS LOCATED 5 MILES NORTHWEST OF SIBLEY...OR 23 MILES NORTH OF VALLEY CITY...MOVING TO THE SOUTH AT 5 MPH. IF YOU ARE IN THE PATH OF A TORNADO THE SAFEST PLACE IS A BASEMENT. GET UNDER A STAIRWAY OR A PIECE OF STURDY FURNITURE. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FRIDAY EVENING FOR NORTHWEST MINNESOTA. LAT...LON 4738 9821 4725 9815 4725 9776 4739 9789 $$ JK/BB
000 WWUS53 KFGF 190044 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 744 PM CDT FRI MAY 18 2007 NDC039-091-190054- /O.EXP.KFGF.TO.W.0004.000000T0000Z-070519T0045Z/ GRIGGS ND-STEELE ND- 744 PM CDT FRI MAY 18 2007 ...THE TORNADO WARNING FOR SOUTHEASTERN GRIGGS AND SOUTHWESTERN STEELE COUNTIES WILL EXPIRE AT 745 PM CDT... DOPPLER RADAR INDICATED THE STORM WAS NO LONGER SEVERE AND SO THE WARNING WILL BE ALLOWED TO EXPIRE AT 745 PM CDT. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FRIDAY EVENING FOR NORTHWEST MINNESOTA. LAT...LON 4738 9821 4725 9815 4725 9776 4739 9789 $$ BB
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 5:16 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele | 59 min |
| May 18, 6:15 PM CDT | Severe Thunderstorm Warning | FGF | Griggs, Steele | 60 min |
| May 18, 6:47 PM CDT | Tornado Warning | FGF | Barnes | 58 min |
Nearby
Tornado Warnings in North Dakota, 2007Every tornado warning in 2007Tornadoes in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.