Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 145, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 21, 1996, 11:19 PM CDT for Chisago County, Isanti County, Minnesota. It was in force for 61 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 21, 1996, 11:19 PM CDT (04:19 UTC)
- Expired
- Jul 22, 1996, 12:20 AM CDT
- In force
- 61 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Chisago County, MN, Isanti County, MN
The radar
The Minneapolis radar (KMPX), 84 km from the middle of the area, began a volume at 04:40 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 21, 11:40 PM CDT | Thunderstorm Wind 50 | Cambridge, MN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 4.3 hours before the alert went out and 85 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
- 368 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1193 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMSP 220421
SVRMSP
MNC025-059-220520-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1119 PM CDT SUN JUL 21 1996
* SEVERE THUNDERSTORM WARNING FOR
CHISAGO COUNTY - EAST CENTRAL MINNESOTA
ISANTI COUNTY - EAST CENTRAL MINNESOTA
* UNTIL 1220 AM CDT
* SOME LOCATIONS AFFECTED
NORTH BRANCH
CAMBRIDGE
SPRING LAKE
ALMELUND
* AT 1118 PM CDT DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 10
MILES WEST OF CAMBRIDGE MINNESOTA. MOVING EAST SOUTHEAST AT 25
MILES AN HOUR..
GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! A TORNADO
WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES.
LRSWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 21, 6:04 PM CDT, 5 hours 15 minutes before
MNZ004>096-220010- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 604 PM CDT SUN JUL 21 1996 ...SEVERE WEATHER THREAT HAS ENDED IN FAR NORTHWEST... THE THREAT FOR SEVERE WEATHER HAS ENDED IN FAR NORTHWEST MINNESOTA INCLUDING THE TOWNS OF THIEF RIVER FALLS...HALLOCK...ROSEAU AND RED LAKE FALLS. THE TORNADO WATCH THAT WAS IN EFFECT UNTIL 8 PM FOR THIS AREA HAS BEEN CANCELLED. TORNADO WATCHES REMAIN IN EFFECT INTO THE EVENING FOR THE REST OF NORTHERN MINNESOTA...NORTH OF A LINE FROM WHEATON TO PINE CITY. KAVINSKY
Special weather statement, Jul 21, 6:21 PM CDT, 4 hours 58 minutes before
MNZ004>096-220010- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 603 PM CDT SUN JUL 21 1996 ...SEVERE WEATHER THREAT HAS ENDED IN FAR NORTHWEST... THE THREAT FOR SEVERE WEATHER HAS ENDED IN FAR NORTHWEST MINNESOTA INCLUDING THE TOWNS OF THIEF RIVER FALLS...HALLOCK...ROSEAU AND RED LAKE FALLS. THE TORNADO WATCH THAT WAS IN EFFECT UNTIL 8 PM FOR THIS AREA HAS BEEN CANCELLED. THE MINNESOTA COUNTIES CLEARED FROM THE TORNADO WATCH ARE KITTSON...ROSEAU...MARSHALL...PENNINGTON AND RED LAKE. TORNADO WATCHES REMAIN IN EFFECT INTO THE EVENING FOR THE REST OF NORTHERN MINNESOTA...NORTH OF A LINE FROM WHEATON TO PINE CITY. KAVINSKY ...ADDED S(PECIFIC COUNTIES
Special weather statement, Jul 21, 10:34 PM CDT, 45 minutes before
MNZ004>096-220430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1030 PM CDT SUN JUL 21 1996 ...PART OF TORNADO WATCH NUMBER 820 CANCELLED... THE FOLLOWING COUNTIES OF TORNADO WATCH NUMBER 820 HAVE BEEN CLEARED...LAKE...NORTHERN AND CENTRAL ST LOUIS...COOK...CROW WING ...AITKIN...MORRISON AND TODD. THE REMAINDER OF THE TORNADO WATCH...WHICH INCLUDES A SMALL PART ODF CENTRAL AND EAST CENTRAL MINNESOTA...FROM NEAR DULUTH TO MILLE LACS COUNTY REMAIN IN THE WATCH UNTIL 11 PM. TORNADO WATCH 822 REMAINS IN EFFECT UNTIL 1 AM FOR MUCH OF EAST CENTRAL AND A SMALL PART OF CENTRAL MINNESOTA. THIS INCLUDES THE TWIN CITIES METRO AREA. DWE
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:03 PM CDT | Severe Thunderstorm Warning | MPX | Todd | 42 min |
| Jul 21, 7:38 PM CDT | Severe Thunderstorm Warning | MPX | Morrison, Todd | 52 min |
| Jul 21, 8:37 PM CDT | Severe Thunderstorm Warning | MPX | Pope | 43 min |
| Jul 21, 8:44 PM CDT | Severe Thunderstorm Warning | MPX | Morrison | 46 min |
| Jul 21, 8:48 PM CDT | Severe Thunderstorm Warning | MPX | Morrison, Todd | 52 min |
| Jul 21, 8:57 PM CDT | Tornado Warning | MPX | Kandiyohi, Stearns | 33 min |
| Jul 21, 9:21 PM CDT | Tornado Warning | MPX | Morrison, Todd | 29 min |
| Jul 21, 9:35 PM CDT | Tornado Warning | MPX | Kandiyohi, Meeker | 25 min |
| Jul 21, 9:53 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Morrison | 37 min |
| Jul 21, 10:32 PM CDT | Severe Thunderstorm Warning | MPX | Benton, Mille Lacs, Sherburne | 43 min |
| Jul 21, 10:57 PM CDT | Tornado Warning | MPX | Isanti, Mille Lacs | 23 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1996Every severe thunderstorm warning in 1996
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.