Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 233, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 6, 2011, 3:29 PM CDT for Ramsey County, Washington County, Minnesota. It was in force for 46 min. 1 report 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
- Aug 6, 2011, 3:29 PM CDT (20:29 UTC)
- Expired
- Aug 6, 2011, 4:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties Ramsey County, MN, Washington County, MN
The radar
The Minneapolis radar (KMPX), 64 km from the middle of the area, began a volume at 20:28 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 |
|---|---|---|---|
| Aug 6, 3:30 PM CDT | HAIL 0.25 | 4 Nne White Bear Lake, MN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 67 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
- 690 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 750 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
372
WUUS53 KMPX 062029
SVRMPX
MNC123-163-062115-
/O.NEW.KMPX.SV.W.0233.110806T2029Z-110806T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
329 PM CDT SAT AUG 6 2011
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EXTREME NORTHEASTERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
* UNTIL 415 PM CDT
* AT 329 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
PRODUCING HALF DOLLAR SIZE HAIL. THIS STORM WAS LOCATED NEAR
CENTERVILLE...OR ABOUT 10 MILES SOUTH OF FOREST LAKE...AND MOVING
EAST AT 25 MPH.
LOCATIONS IN THE WARNING INCLUDE...
HUGO...
STILLWATER...
MARINE ON ST CROIX...
BAYPORT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
REPORT ANY SIGNIFICANT WIND OR HAIL DAMAGE TO THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.
&&
LAT...LON 4520 9277 4509 9276 4508 9280 4505 9280
4503 9276 4502 9276 4501 9278 4508 9303
4517 9302
TIME...MOT...LOC 2029Z 273DEG 20KT 4513 9298
WIND...HAIL <50MPH 1.25IN
$$3 follow-up statements
900
WWUS53 KMPX 062043
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
343 PM CDT SAT AUG 6 2011
MNC123-163-062115-
/O.CON.KMPX.SV.W.0233.000000T0000Z-110806T2115Z/
RAMSEY MN-WASHINGTON MN-
343 PM CDT SAT AUG 6 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
WASHINGTON AND RAMSEY COUNTIES UNTIL 415 PM CDT...
AT 343 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS
LOCATED NEAR HUGO...OR 11 MILES SOUTH OF FOREST LAKE...MOVING EAST
SOUTHEAST AT 20 MPH.
LOCATIONS IMPACTED INCLUDE...
STILLWATER...MARINE ON ST CROIX...BAYPORT AND OAK PARK HEIGHTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
&&
LAT...LON 4520 9277 4509 9276 4508 9280 4505 9280
4503 9276 4502 9276 4501 9278 4508 9303
4517 9302
TIME...MOT...LOC 2043Z 281DEG 19KT 4512 9293
WIND...HAIL <50MPH 1.00IN
$$160
WWUS53 KMPX 062056
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
356 PM CDT SAT AUG 6 2011
MNC123-062111-
/O.CAN.KMPX.SV.W.0233.000000T0000Z-110806T2115Z/
RAMSEY MN-
356 PM CDT SAT AUG 6 2011
...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTHEASTERN RAMSEY
COUNTY IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF EXTREME
NORTHEASTERN RAMSEY COUNTY.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
LAT...LON 4509 9276 4508 9280 4505 9280 4502 9276
4501 9278 4507 9298 4512 9298 4513 9298
4516 9277
TIME...MOT...LOC 2056Z 291DEG 16KT 4508 9292
$$
MNC163-062115-
/O.CON.KMPX.SV.W.0233.000000T0000Z-110806T2115Z/
WASHINGTON MN-
356 PM CDT SAT AUG 6 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
WASHINGTON COUNTY UNTIL 415 PM CDT...
AT 356 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS
LOCATED NEAR MAHTOMEDI...OR 12 MILES NORTHEAST OF ST PAUL...MOVING
EAST AT 20 MPH.
LOCATIONS IMPACTED INCLUDE...
STILLWATER...BAYPORT AND OAK PARK HEIGHTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
&&
LAT...LON 4509 9276 4508 9280 4505 9280 4502 9276
4501 9278 4507 9298 4512 9298 4513 9298
4516 9277
TIME...MOT...LOC 2056Z 291DEG 16KT 4508 9292
WIND...HAIL <50MPH 1.00IN
$$879
WWUS53 KMPX 062109
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
409 PM CDT SAT AUG 6 2011
MNC163-062124-
/O.EXP.KMPX.SV.W.0233.000000T0000Z-110806T2115Z/
WASHINGTON MN-
409 PM CDT SAT AUG 6 2011
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WASHINGTON COUNTY WILL
EXPIRE AT 415 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY. SCATTERED THUNDERSTORMS ARE STILL EXPECTED INTO THE
EVENING HOURS ACROSS THE TWIN CITIES METRO AREA.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
LAT...LON 4509 9276 4508 9280 4505 9280 4502 9276
4501 9278 4507 9298 4512 9298 4513 9298
4516 9277
TIME...MOT...LOC 2109Z 291DEG 16KT 4506 9284
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 10:55 PM CDT | Areal Flood Advisory | MPX | Kandiyohi, Meeker, Sherburne, Wright | 3 hr |
| Aug 6, 10:59 AM CDT | Areal Flood Advisory | MPX | Douglas, Mille Lacs, Morrison, Todd | 4 hr |
| Aug 6, 11:59 AM CDT | Special Weather Statement | MPX | Morrison | 61 min |
| Aug 6, 12:37 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Isanti, Kanabec, Mille Lacs, Morrison | 53 min |
| Aug 6, 1:20 PM CDT | Severe Thunderstorm Warning | MPX | Chisago, Isanti, Kanabec | 31 min |
| Aug 6, 2:35 PM CDT | Special Weather Statement | MPX | Anoka | 25 min |
| Aug 6, 3:18 PM CDT | Special Weather Statement | MPX | Washington | 27 min |
| Aug 6, 5:36 PM CDT | Special Weather Statement | MPX | Douglas | 24 min |
| Aug 6, 6:59 PM CDT | Special Weather Statement | MPX | Stearns | 46 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.