Alert archive / North Dakota / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 137, NWS Bismarck, ND

July 13, 2009Grant County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 13, 2009, 9:21 AM MDT for Grant County, Sioux County, North Dakota. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 13, 2009, 9:21 AM MDT (15:21 UTC)
Expired: Jul 13, 2009, 9:55 AM MDT
In force: 34 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

Counties Grant County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 74 km from the middle of the area, began a volume at 15:21 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 nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 3.4 hours before the alert went out and 269 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1159 J/kg
Mixed-layer CIN: -194 J/kg
Mixed-layer LCL: 941 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

What 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.

NWS Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 13, 2:50 AM MDT, 6 hours 31 minutes earlier.

Area forecast discussion, Jul 13, 2:50 AM MDT, 6 hours 31 minutes before

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Hazardous weather outlook, Jul 13, 3:47 AM MDT, 5 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BISMARCK ND
447 AM CDT MON JUL 13 2009

NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-141000-
DIVIDE-BURKE-RENVILLE-BOTTINEAU-ROLETTE-WILLIAMS-MOUNTRAIL-WARD-
MCHENRY-PIERCE-MCKENZIE-DUNN-MERCER-OLIVER-MCLEAN-SHERIDAN-WELLS-
FOSTER-GOLDEN VALLEY-BILLINGS-STARK-MORTON-BURLEIGH-KIDDER-
STUTSMAN-SLOPE-HETTINGER-GRANT-BOWMAN-ADAMS-SIOUX-EMMONS-LOGAN-
LA MOURE-MCINTOSH-DICKEY-
447 AM CDT MON JUL 13 2009 /347 AM MDT MON JUL 13 2009/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
NORTH DAKOTA...NORTHWEST NORTH DAKOTA...SOUTH CENTRAL NORTH
DAKOTA...SOUTHEAST NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

A POTENT STORM SYSTEM IS EXPECTED TO AFFECT THE NORTHERN PLAINS
TODAY THROUGH TUESDAY. SCATTERED THUNDERSTORMS WILL MOVE ACROSS
PORTIONS OF WESTERN AND CENTRAL NORTH DAKOTA DURING THE MORNING
HOURS. HOWEVER...ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP
ACROSS WESTERN NORTH DAKOTA LATER THIS AFTERNOON. THE ENVIRONMENT
IN WHICH THESE STORMS DEVELOP WILL ALLOW THESE STORMS TO QUICKLY
BECOME SEVERE AS THEY MOVE ACROSS WESTERN NORTH DAKOTA LATER
TODAY. THE GREATEST RISK OF SEVERE WEATHER THIS AFTERNOON AND
EARLY EVENING WILL BE ACROSS THE SOUTHWEST...WHERE LARGE HAIL
DAMAGING WINDS AND TORNADOES ARE POSSIBLE. THESE STORMS ARE
EXPECTED TO SPREAD EAST ACROSS MUCH OF CENTRAL NORTH DAKOTA THIS
EVENING AND OVERNIGHT...AND WILL BRING A TREAT FOR HAIL AND
DAMAGING WINDS TO CENTRAL NORTH DAKOTA. IN ADDITION TO THE SEVERE
THREAT...THESE THUNDERSTORMS WILL ALSO BE CAPABLE OF PRODUCING
LOCALLY HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

SCATTERED THUNDERSTORMS ARE EXPECTED AGAIN ON TUESDAY AS THE UPPER
LEVEL SYSTEM MOVES ACROSS THE AREA. WINDS WILL ALSO BECOME STRONG
ACROSS THE WEST DURING THE DAY ON TUESDAY IN THE WAKE OF THIS
STORM SYSTEM. CURRENTLY...IT APPEARS THE STRONGEST WINDS WILL
OCCUR ACROSS THE SOUTHWEST...WHERE WINDS OF 25 TO 35 MPH ARE POSSIBLE.
SLIGHTLY LIGHTER WINDS CAN BE EXPECTED FARTHER NORTH AND EAST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED LATER TODAY AND TONIGHT.

KJB

In the hours before

Local storm report, Jul 13, 8:01 AM MDT, 1 hour 20 minutes before

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Local storm report, Jul 13, 8:02 AM MDT, 1 hour 19 minutes before

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The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 13, 5:08 AM MDT	Severe Thunderstorm Warning	BIS	Adams	67 min
Jul 13, 6:09 AM MDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Sioux	51 min
Jul 13, 12:58 PM MDT	Areal Flood Advisory	BIS	Adams, Grant, Hettinger, Sioux	6 hr
Jul 13, 1:52 PM MDT	Flash Flood Watch	BIS	Adams, Bowman, Burleigh, Dickey, Emmons, Grant and 9 more	13 hr

Nearby

Severe Thunderstorm Warnings in North Dakota, 2009 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.