Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 203, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 30, 2011, 9:50 PM CDT for Ramsey County, Washington County, Minnesota. It was in force for 55 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
- Jul 30, 2011, 9:50 PM CDT (02:50 UTC)
- Expired
- Jul 30, 2011, 10:45 PM CDT
- In force
- 55 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Ramsey County, MN, Washington County, MN
The radar
The Minneapolis radar (KMPX), 54 km from the middle of the area, began a volume at 02:53 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 30, 5:31 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.8 hours before the alert went out and 56 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
- 2387 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 1239 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 8.4
The text
As transmitted, in the capitals the NWS used until 2016.
888
WUUS53 KMPX 310250
SVRMPX
MNC123-163-310345-
/O.NEW.KMPX.SV.W.0203.110731T0250Z-110731T0345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
950 PM CDT SAT JUL 30 2011
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
* UNTIL 1045 PM CDT
* AT 949 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
CAPABLE OF PRODUCING QUARTER SIZE HAIL AND WINDS UP TO 70 MPH.
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM FOREST LAKE
TO LINO LAKES TO ANDOVER...AND MOVING SOUTHEAST AT 35 MPH.
LOCATIONS IN THE WARNING INCLUDE...
FOREST LAKE...
ST PAUL...
SCANDIA...
HUGO...
NORTH OAKS...
MOUNDS VIEW...
SHOREVIEW...
NEW BRIGHTON...
WHITE BEAR LAKE...
MARINE ON ST CROIX...
ARDEN HILLS...
VADNAIS HEIGHTS...
MAHTOMEDI...
WILLERNIE...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!
&&
LAT...LON 4529 9282 4519 9276 4511 9274 4505 9280
4503 9276 4492 9275 4475 9281 4478 9293
4477 9301 4488 9301 4492 9305 4492 9312
4505 9323 4512 9322 4513 9302 4529 9302
TIME...MOT...LOC 0250Z 329DEG 30KT 4530 9298 4521 9310
4522 9330
WIND...HAIL 70MPH 1.00IN
$$2 follow-up statements
939
WWUS53 KMPX 310324
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1024 PM CDT SAT JUL 30 2011
MNC123-163-310345-
/O.CON.KMPX.SV.W.0203.000000T0000Z-110731T0345Z/
RAMSEY MN-WASHINGTON MN-
1024 PM CDT SAT JUL 30 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WASHINGTON AND
EASTERN RAMSEY COUNTIES UNTIL 1045 PM CDT...
AT 1024 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
STILLWATER TO LAKE ELMO TO LITTLE CANADA...MOVING SOUTHEAST AT 35
MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.
LOCATIONS IMPACTED INCLUDE...
BAYPORT...LAKELAND...WOODBURY...NEWPORT...ST PAUL PARK...COTTAGE
GROVE...LANDFALL AND AFTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.
&&
LAT...LON 4519 9277 4511 9274 4508 9280 4505 9280
4503 9276 4497 9277 4492 9275 4475 9281
4478 9293 4477 9301 4488 9301 4503 9315
4522 9292 4522 9283
TIME...MOT...LOC 0324Z 329DEG 30KT 4506 9277 4497 9289
4498 9308
WIND...HAIL 60MPH 0.75IN
$$788
WWUS53 KMPX 310342
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1042 PM CDT SAT JUL 30 2011
MNC123-163-310357-
/O.EXP.KMPX.SV.W.0203.000000T0000Z-110731T0345Z/
RAMSEY MN-WASHINGTON MN-
1042 PM CDT SAT JUL 30 2011
...THE SEVERE THUNDERSTORM WARNING FOR WASHINGTON AND EASTERN RAMSEY
COUNTIES WILL EXPIRE AT 1045 PM CDT...
THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH
THESE THUNDERSTORMS.
IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT.
LAT...LON 4519 9277 4511 9274 4508 9280 4505 9280
4503 9276 4497 9277 4492 9275 4475 9281
4478 9293 4477 9301 4488 9301 4503 9315
4522 9292 4522 9283
TIME...MOT...LOC 0342Z 329DEG 30KT 4493 9266 4484 9278
4485 9297
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 7:10 PM CDT | Tornado Warning | MPX | Todd | 50 min |
| Jul 30, 7:15 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 30 min |
| Jul 30, 7:28 PM CDT | Areal Flood Advisory | MPX | Todd | 3 hr |
| Jul 30, 7:42 PM CDT | Severe Thunderstorm Warning | MPX | Todd | 63 min |
| Jul 30, 7:45 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec | 45 min |
| Jul 30, 8:01 PM CDT | Severe Thunderstorm Warning | MPX | Kanabec, Mille Lacs | 29 min |
| Jul 30, 8:15 PM CDT | Severe Thunderstorm Warning | MPX | Stearns | 60 min |
| Jul 30, 8:18 PM CDT | Severe Thunderstorm Warning | MPX | Isanti, Kanabec, Mille Lacs | 72 min |
| Jul 30, 8:22 PM CDT | Tornado Warning | MPX | Isanti, Kanabec, Mille Lacs | 38 min |
| Jul 30, 8:50 PM CDT | Severe Thunderstorm Warning | MPX | Isanti | 55 min |
| Jul 30, 8:53 PM CDT | Tornado Warning | MPX | Isanti | 35 min |
| Jul 30, 8:56 PM CDT | Areal Flood Advisory | MPX | Anoka, Isanti, Kanabec, Mille Lacs, Sherburne | 6 hr |
| Jul 30, 9:07 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi, Meeker, Stearns | 38 min |
| Jul 30, 9:20 PM CDT | Severe Thunderstorm Warning | MPX | Anoka | 55 min |
| Jul 30, 9:48 PM CDT | Special Weather Statement | MPX | McLeod, Meeker | 42 min |
| Jul 30, 9:54 PM CDT | Areal Flood Advisory | MPX | Anoka, Dakota, Hennepin, Ramsey, Washington | 6 hr |
| Jul 30, 10:21 PM CDT | Severe Thunderstorm Warning | MPX | Anoka | 39 min |
| Jul 30, 11:20 PM CDT | Special Weather Statement | MPX | Le Sueur | 40 min |
| Jul 30, 11:26 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Scott, Sibley | 31 min |
| Jul 30, 11:32 PM CDT | Special Weather Statement | MPX | Goodhue | 43 min |
| Jul 30, 11:55 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 35 min |
| Jul 31, 4:00 PM CDT | Heat Advisory | MPX | Anoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 29 more | 28 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.