Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 393, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 21, 2007, 6:13 AM CDT for Anoka County, Isanti County, Minnesota. It was in force for 22 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 21, 2007, 6:13 AM CDT (11:13 UTC)
- Expired
- Sep 21, 2007, 6:35 AM CDT
- In force
- 22 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
Counties Anoka County, MN, Isanti County, MN
The radar
The Minneapolis radar (KMPX), 80 km from the middle of the area, began a volume at 11:12 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 21, 6:04 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 11.2 hours before the alert went out and 81 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
- 1394 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 838 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 567 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 24.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS53 KMPX 211113
SVRMPX
MNC003-059-211200-
/O.NEW.KMPX.SV.W.0393.070921T1113Z-070921T1200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
613 AM CDT FRI SEP 21 2007
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
NORTHERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
* UNTIL 700 AM CDT
* AT 612 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING NICKEL SIZE HAIL. THIS STORM WAS LOCATED 10
MILES SOUTHWEST OF ISANTI...OR ABOUT 13 MILES SOUTHEAST OF
PRINCETON...AND MOVING NORTHEAST AT 50 MPH.
* LOCATIONS IMPACTED INCLUDE...
ISANTI...
CAMBRIDGE...
SAINT FRANCIS...
STAY INDOORS...AND AWAY FROM WINDOWS.
LAT...LON 4566 9314 4556 9314 4555 9303 4536 9303
4534 9351 4553 9351
TIME...MOT...LOC 1113Z 244DEG 43KT 4543 9341
$$
KAT2 follow-up statements
000
WWUS53 KMPX 211126
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
627 AM CDT FRI SEP 21 2007
MNC003-211137-
/O.CAN.KMPX.SV.W.0393.000000T0000Z-070921T1200Z/
ANOKA MN-
627 AM CDT FRI SEP 21 2007
...THE SEVERE THUNDERSTORM WARNING FOR ANOKA COUNTY IS CANCELLED...
THE STORM THAT PROMPTED THE WARNING HAS MOVED NORTH OF THE COUNTY.
REMAIN ALERT FOR FUTURE STATEMENTS AND ADDITIONAL WARNINGS AS STORMS
WERE CONTINUING TO DEVELOP SOUTH AND WEST OF THE AREA.
LAT...LON 4566 9314 4556 9314 4555 9303 4542 9303
4542 9345 4554 9342
TIME...MOT...LOC 1127Z 242DEG 46KT 4560 9313
$$
MNC059-211200-
/O.CON.KMPX.SV.W.0393.000000T0000Z-070921T1200Z/
ISANTI MN-
627 AM CDT FRI SEP 21 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 AM CDT
FOR ISANTI COUNTY...
AT 621 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING NICKEL SIZE HAIL. THIS STORM WAS
LOCATED NEAR CAMBRIDGE...OR ABOUT OVER ISANTI...AND MOVING NORTHEAST
AT 50 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE GRANDY...BODUM...ATHENS...
ISANTI AND CAMBRIDGE.
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 4566 9314 4556 9314 4555 9303 4542 9303
4542 9345 4554 9342
TIME...MOT...LOC 1127Z 242DEG 46KT 4560 9313
$$
KAT000
WWUS53 KMPX 211135
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
635 AM CDT FRI SEP 21 2007
MNC059-211145-
/O.CAN.KMPX.SV.W.0393.000000T0000Z-070921T1200Z/
ISANTI MN-
635 AM CDT FRI SEP 21 2007
...THE SEVERE THUNDERSTORM WARNING FOR ISANTI COUNTY IS CANCELLED...
RADAR INDICATED THAT THE SEVERE THUNDERSTORM HAD MOVED OUT OF THE
WARNED AREA. THUS THE WARNING HAS BEEN CANCELLED.
ADDITIONAL THUNDERSTORMS WILL APPROACH ISANTI COUNTY FROM THE SOUTH
AND WEST THIS MORNING. REMAIN ALERT FOR FUTURE STATEMENTS AND
POSSIBLE WARNINGS.
LAT...LON 4566 9314 4556 9314 4555 9303 4542 9303
4542 9345 4554 9342
TIME...MOT...LOC 1135Z 242DEG 46KT 4564 9300
$$
KATThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 7:29 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Washington | 34 min |
| Sep 20, 7:56 PM CDT | Severe Thunderstorm Warning | MPX | Isanti | 38 min |
| Sep 21, 1:06 AM CDT | Severe Thunderstorm Warning | MPX | Douglas | 38 min |
| Sep 21, 1:36 AM CDT | Severe Thunderstorm Warning | MPX | Todd | 54 min |
| Sep 21, 4:30 AM CDT | Wind Advisory | MPX | Benton, Brown, Chippewa, Douglas, Kandiyohi, Lac qui Parle and 15 more | 10 hr |
| Sep 21, 5:31 AM CDT | Severe Thunderstorm Warning | MPX | Wright | 44 min |
| Sep 21, 5:36 AM CDT | Severe Thunderstorm Warning | MPX | Chisago, Isanti | 25 min |
| Sep 21, 5:45 AM CDT | Severe Thunderstorm Warning | MPX | Benton | 18 min |
| Sep 21, 5:59 AM CDT | Severe Thunderstorm Warning | MPX | Sherburne | 17 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.