Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 166, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 23, 2011, 12:44 AM CDT for Ransom County, Richland County, Sargent County, North Dakota. It was in force for 35 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 23, 2011, 12:44 AM CDT (05:44 UTC)
- Expired
- Aug 23, 2011, 1:19 AM CDT
- In force
- 35 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Ransom County, ND, Richland County, ND, Sargent County, ND
The radar
The Aberdeen radar (KABR), 122 km from the middle of the area, began a volume at 05:46 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
Aberdeen, SD (KABR), launched 00:00Z, 5.7 hours before the alert went out and 174 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
- 2620 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 1327 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.8
The text
As transmitted, in the capitals the NWS used until 2016.
746 WUUS53 KFGF 230544 SVRFGF NDC073-077-081-230630- /O.NEW.KFGF.SV.W.0166.110823T0544Z-110823T0630Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1244 AM CDT TUE AUG 23 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA... WESTERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA... NORTHERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA... * UNTIL 130 AM CDT * AT 1239 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 8 MILES SOUTH OF VENLO...OR 43 MILES WEST OF WAHPETON...MOVING TO THE EAST AT 40 MPH. ALSO PENNY SIZE HAIL MAY ACCOMPANY THE DAMAGING WINDS. * THE SEVERE THUNDERSTORM WILL BE NEAR... MCLEOD AND DE LAMERE AROUND 1255 AM CDT. HAMLIN...GENESEO AND BARRIE AROUND 100 AM CDT. WYNDMERE AROUND 105 AM CDT. LIDGERWOOD AROUND 110 AM CDT. THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE WALCOTT...MANTADOR AND CHRISTINE. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF SEVERE WEATHER IS OBSERVED CONTACT YOUR LOCAL LAW ENFORCEMENT AND ASK THEM TO RELAY YOUR INFORMATION TO THE NATIONAL WEATHER SERVICE IN GRAND FORKS. && LAT...LON 4617 9786 4662 9766 4659 9677 4600 9698 TIME...MOT...LOC 0542Z 280DEG 35KT 4637 9746 WIND...HAIL 60MPH 0.75IN $$ JR
1 follow-up statement
993 WWUS53 KFGF 230619 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 119 AM CDT TUE AUG 23 2011 NDC073-077-081-230628- /O.CAN.KFGF.SV.W.0166.000000T0000Z-110823T0630Z/ RANSOM ND-SARGENT ND-RICHLAND ND- 119 AM CDT TUE AUG 23 2011 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN RICHLAND...NORTHERN SARGENT AND EASTERN RANSOM COUNTIES IN SOUTHEAST NORTH DAKOTA IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF THE WARNED AREA. HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4617 9786 4662 9766 4659 9677 4600 9698 TIME...MOT...LOC 0618Z 280DEG 35KT 4630 9696 $$ JR
Nearby
Severe Thunderstorm Warnings in North Dakota, 2011Every severe thunderstorm warning in 2011
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.