Alert archive / Minnesota / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 595

July 20, 200115 counties in Minnesota; 5 counties in North Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2001, 2:30 AM CDT for 15 counties in Minnesota; 5 counties in North Dakota. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jul 20, 2001, 2:30 AM CDT (07:30 UTC)
Expired
Jul 20, 2001, 5:00 AM CDT
In force
3 hr
Issued by
the Storm Prediction Center

Counties Becker County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Kittson County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Wadena County, MN, Wilkin County, MN, Grand Forks County, ND, Pembina County, ND, Richland County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 99 km from the middle of the area, began a volume at 07:30 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.

Warnings issued inside it

1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 20, 4:54 AM CDTSevere Thunderstorm WarningFGFRichland66 min

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 7.5 hours before the alert went out and 367 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.

Skew-T log-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2001-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2229 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2001-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2229 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
1611 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.2
Supercell composite
5.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 19, 11:30 PM CDTSevere Thunderstorm WatchSPCBarnes, Benson, Bottineau, Burke, Burleigh, Cass and 31 more6 hr
Jul 20, 1:30 PM CDTTornado WatchSPCBillings, Burke, Divide, Dunn, McKenzie, Mercer and 2 more6 hr
Jul 20, 5:00 PM CDTTornado WatchSPCAdams, Billings, Bowman, Golden Valley, Hettinger, Slope and 1 more7 hr
Jul 20, 6:30 PM CDTTornado WatchSPCBottineau, Burke, Divide, Dunn, McHenry, McKenzie and 9 more6 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 2001Severe Thunderstorm Watches in North Dakota, 2001Every severe thunderstorm watch in 2001

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.