Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 55, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 24, 2009, 7:41 AM CDT for Anoka County, Ramsey County, Washington County, Minnesota. It was in force for 34 min. 4 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
- Jul 24, 2009, 7:41 AM CDT (12:41 UTC)
- Expired
- Jul 24, 2009, 8:15 AM CDT
- In force
- 34 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Anoka County, MN, Ramsey County, MN, Washington County, MN
The radar
The Minneapolis radar (KMPX), 57 km from the middle of the area, began a volume at 12:41 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 |
|---|---|---|---|
| Jul 24, 7:50 AM CDT | HAIL 0.88 | 1 N Circle Pines, MN | |
| Jul 24, 8:07 AM CDT | HAIL 1.5 | 5 Se Blaine, MN | IN NORTHERN SHOREVIEW ALONG THE ANOKA RAMSEY COUNTY LINE. |
| Jul 24, 8:15 AM CDT | HAIL 1 | 6 Nne Roseville, MN | AT GOLF COURSE. MOST HAIL WAS 1/2 TO 3/4 INCH. |
| Jul 24, 8:24 AM CDT | HAIL 1 | 5 Ne Roseville, MN | REPORTED AT COUNTY RD F AND STOCKDALE |
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, 0.7 hours before the alert went out and 59 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
- 14 J/kg
- Mixed-layer CIN
- -286 J/kg
- Mixed-layer LCL
- 1508 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 190 m²/s²
- 0-3 km storm-relative helicity
- 318 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KMPX 241241 SVRMPX MNC003-123-163-241315- /O.NEW.KMPX.SV.W.0055.090724T1241Z-090724T1315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 741 AM CDT FRI JUL 24 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA... NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA... NORTHEASTERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA... * UNTIL 815 AM CDT * AT 740 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THIS STORM WAS LOCATED 3 MILES NORTH OF CIRCLE PINES...OR ABOUT 16 MILES NORTH OF ST PAUL...AND MOVING SOUTHEAST AT 25 MPH. * LOCATIONS IN THE WARNING INCLUDE... CIRCLE PINES... LINO LAKES... CENTERVILLE... NORTH OAKS... HUGO... VADNAIS HEIGHTS... WHITE BEAR LAKE... MAHTOMEDI... WILLERNIE... NORTH ST PAUL... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. THIS STORM HAS A HISTORY OF PRODUCING GOLF BALL SIZE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS && LAT...LON 4516 9277 4499 9297 4520 9334 4532 9315 TIME...MOT...LOC 1241Z 309DEG 22KT 4517 9313 $$ LS
3 follow-up statements
000 WWUS53 KMPX 241254 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 754 AM CDT FRI JUL 24 2009 MNC003-123-163-241315- /O.CON.KMPX.SV.W.0055.000000T0000Z-090724T1315Z/ ANOKA MN-WASHINGTON MN-RAMSEY MN- 754 AM CDT FRI JUL 24 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM CDT FOR NORTHEASTERN RAMSEY...NORTHERN WASHINGTON AND SOUTHEASTERN ANOKA COUNTIES... AT 751 AM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM... CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THE SEVERE STORM WAS LOCATED NEAR LINO LAKES...OR ABOUT OVER LINO LAKES...AND MOVING SOUTHEAST AT 25 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE...VADNAIS HEIGHTS...HUGO... WHITE BEAR LAKE...GEM LAKE...WILLERNIE...MAHTOMEDI AND NORTH ST PAUL. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. THIS STORM HAS A HISTORY OF PRODUCING GOLF BALL SIZE HAIL. THIS IS AN EXTREMELY DANGEROUS SITUATION. && LAT...LON 4529 9309 4516 9277 4499 9297 4516 9327 TIME...MOT...LOC 1254Z 308DEG 21KT 4513 9306 $$ LS
000 WWUS53 KMPX 241306 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 806 AM CDT FRI JUL 24 2009 MNC003-123-163-241315- /O.CON.KMPX.SV.W.0055.000000T0000Z-090724T1315Z/ ANOKA MN-WASHINGTON MN-RAMSEY MN- 806 AM CDT FRI JUL 24 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM CDT FOR NORTHEASTERN RAMSEY...NORTHERN WASHINGTON AND SOUTHEASTERN ANOKA COUNTIES... AT 750 AM NICKEL SIZE HAIL WAS REPORTED 1 MILE NORTH OF CIRCLE PINES IN ANOKA COUNTY. AT 803 AM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM... CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THE SEVERE STORM WAS LOCATED NEAR WHITE BEAR LAKE...OR ABOUT 2 MILES NORTH OF WHITE BEAR LAKE...AND MOVING SOUTHEAST AT 25 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE...MAHTOMEDI...WILLERNIE AND NORTH ST PAUL. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. REPORT ANY DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE. && LAT...LON 4513 9321 4523 9295 4516 9277 4499 9297 TIME...MOT...LOC 1305Z 308DEG 21KT 4509 9299 $$ LS
000 WWUS53 KMPX 241317 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 817 AM CDT FRI JUL 24 2009 MNC003-123-163-241326- /O.EXP.KMPX.SV.W.0055.000000T0000Z-090724T1315Z/ ANOKA MN-WASHINGTON MN-RAMSEY MN- 817 AM CDT FRI JUL 24 2009 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RAMSEY...NORTHERN WASHINGTON AND SOUTHEASTERN ANOKA COUNTIES EXPIRED AT 815 AM CDT... AT 750 AM NICKEL SIZE HAIL WAS REPORTED 1 MILE NORTH OF CIRCLE PINES IN ANOKA COUNTY. THIS SEVERE STORMS HAD WEAKENED...BUT MAY RE-INTENSIFY AGAIN. REMAIN ALERT FOR ADDITIONAL WARNINGS. REPORT ANY DAMAGE THAT MAY HAVE OCCURRED...TO THE NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE. LAT...LON 4513 9321 4523 9295 4516 9277 4499 9297 TIME...MOT...LOC 1306Z 308DEG 21KT 4508 9298 $$ LS
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 2:11 AM CDT | Special Weather Statement | MPX | Todd | 49 min |
| Jul 24, 6:35 AM CDT | Special Weather Statement | MPX | Chisago | 40 min |
| Jul 24, 6:53 AM CDT | Special Weather Statement | MPX | Anoka | 52 min |
| Jul 24, 7:20 AM CDT | Special Weather Statement | MPX | Anoka | 25 min |
| Jul 24, 7:38 AM CDT | Special Weather Statement | MPX | Anoka, Washington | 37 min |
| Jul 24, 8:20 AM CDT | Special Weather Statement | MPX | Ramsey, Washington | 25 min |
| Jul 24, 8:28 AM CDT | Severe Thunderstorm Warning | MPX | Ramsey, Washington | 32 min |
| Jul 24, 9:01 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Washington | 29 min |
| Jul 24, 9:08 AM CDT | Special Weather Statement | MPX | Goodhue | 52 min |
| Jul 24, 9:15 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Rice | 60 min |
| Jul 24, 9:28 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue | 48 min |
| Jul 24, 9:31 AM CDT | Special Weather Statement | MPX | Rice | 29 min |
| Jul 24, 9:38 AM CDT | Severe Thunderstorm Warning | MPX | Rice, Steele | 32 min |
| Jul 24, 10:18 AM CDT | Special Weather Statement | MPX | Goodhue | 42 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2009Every severe thunderstorm warning in 2009
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.