Alert archive / North Dakota / Tornado Warnings in 2013
Tornado Warning 16, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Aug 31, 2013, 4:06 PM CDT for Pembina County, North Dakota. It was in force for 24 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
- Aug 31, 2013, 4:06 PM CDT (21:06 UTC)
- Expired
- Aug 31, 2013, 4:30 PM CDT
- In force
- 24 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Pembina County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 126 km from the middle of the area, began a volume at 21:09 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 nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 9.1 hours before the alert went out and 298 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
- 216 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 305 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
556 WFUS53 KFGF 312106 TORFGF NDC067-312130- /O.NEW.KFGF.TO.W.0016.130831T2106Z-130831T2130Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 406 PM CDT SAT AUG 31 2013 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN PEMBINA COUNTY IN NORTHEAST NORTH DAKOTA... * UNTIL 430 PM CDT * AT 404 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO WAS LOCATED NEAR ST. THOMAS...AND MOVING EAST AT 30 MPH. HAZARD...TORNADO. SOURCE...RADAR INDICATED ROTATION. SPOTTERS REPORTED DUST BEING DRAWN UP INTO STORM. IMPACT...SPORADIC DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. * THIS DANGEROUS STORM WILL BE NEAR... ST. THOMAS AND GLASSTON AROUND 410 PM CDT. BOWESMONT AROUND 430 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND FORKS. && LAT...LON 4872 9715 4857 9717 4855 9770 4874 9762 TIME...MOT...LOC 2105Z 273DEG 28KT 4863 9748 TORNADO...RADAR INDICATED HAIL...<.75IN $$ DTR
1 follow-up statement
082 WWUS53 KFGF 312131 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 431 PM CDT SAT AUG 31 2013 NDC067-312141- /O.EXP.KFGF.TO.W.0016.000000T0000Z-130831T2130Z/ PEMBINA ND- 431 PM CDT SAT AUG 31 2013 ...THE TORNADO WARNING FOR SOUTHEASTERN PEMBINA COUNTY HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. THE STORM WAS LOCATED BETWEEN ST THOMAS AND DRAYTON AND MAY STILL PRODUCE SMALL HAIL AND HEAVY RAIN. BUT ROTATION HAS WEAKENED. LAT...LON 4872 9715 4857 9717 4855 9770 4874 9762 TIME...MOT...LOC 2106Z 273DEG 28KT 4863 9747 $$ DTR
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 7:50 PM CDT | Special Weather Statement | FGF | Towner | 55 min |
| Aug 30, 11:08 PM CDT | Special Weather Statement | FGF | Benson | 67 min |
| Aug 31, 3:51 PM CDT | Severe Thunderstorm Warning | FGF | Richland | 24 min |
| Aug 31, 5:23 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 67 min |
Nearby
Tornado Warnings in North Dakota, 2013Every tornado warning in 2013Tornadoes in 2013
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.