Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 397, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 24, 2007, 5:22 PM CDT for Chisago County, Isanti County, Minnesota. It was in force for 38 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
- Sep 24, 2007, 5:22 PM CDT (22:22 UTC)
- Expired
- Sep 24, 2007, 6:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
Counties Chisago County, MN, Isanti County, MN
The radar
The Minneapolis radar (KMPX), 87 km from the middle of the area, began a volume at 22:22 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 |
|---|---|---|---|
| Sep 24, 4:57 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 10.4 hours before the alert went out and 88 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
- 176 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 899 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 90 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 242222 SVRMPX MNC025-059-242300- /O.NEW.KMPX.SV.W.0397.070924T2222Z-070924T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 522 PM CDT MON SEP 24 2007 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ISANTI COUNTY IN EAST CENTRAL MINNESOTA... CHISAGO COUNTY IN EAST CENTRAL MINNESOTA... * UNTIL 600 PM CDT * AT 518 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM... CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 65 MPH. THIS STORM WAS LOCATED 5 MILES SOUTH OF ISANTI...OR ABOUT 10 MILES SOUTH OF CAMBRIDGE...AND MOVING NORTHEAST AT 50 MPH. * LOCATIONS IMPACTED INCLUDE... CAMBRIDGE... NORTH BRANCH... BRAHAM... RUSH CITY... ISANTI... HARRIS... STAY INDOORS...AND AWAY FROM WINDOWS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT TUESDAY MORNING FOR SOUTHEASTERN MINNESOTA AND NORTHWESTERN WISCONSIN. LAT...LON 4542 9295 4542 9338 4573 9319 4573 9285 TIME...MOT...LOC 2222Z 221DEG 46KT 4546 9318 $$
1 follow-up statement
000
WWUS53 KMPX 242248
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
549 PM CDT MON SEP 24 2007
MNC025-242300-
/O.CON.KMPX.SV.W.0397.000000T0000Z-070924T2300Z/
CHISAGO MN-
549 PM CDT MON SEP 24 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR CHISAGO COUNTY...
AT 544 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 65
MPH. THIS STORM WAS LOCATED 4 MILES SOUTHEAST OF HARRIS...OR ABOUT 5
MILES NORTHEAST OF NORTH BRANCH...AND MOVING NORTHEAST AT 45 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE RUSH CITY...NORTH BRANCH...
HARRIS AND BRANCH.
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
LAT...LON 4564 9287 4564 9289 4558 9289 4557 9291
4553 9291 4543 9294 4542 9300 4572 9303
4573 9285
TIME...MOT...LOC 2249Z 225DEG 41KT 4562 9287
$$
RAHThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 24, 4:28 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Le Sueur, Nicollet | 47 min |
| Sep 24, 4:35 PM CDT | Severe Thunderstorm Warning | MPX | McLeod | 25 min |
| Sep 24, 5:03 PM CDT | Severe Thunderstorm Warning | MPX | Scott | 42 min |
| Sep 24, 5:33 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 42 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2007Every severe thunderstorm warning in 2007
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.