Alert archive / Montana / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 64, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 17, 2013, 5:00 PM MDT for Gallatin County, Madison County, Montana. It was in force for 45 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 17, 2013, 5:00 PM MDT (23:00 UTC)
- Expired
- Jul 17, 2013, 5:45 PM MDT
- In force
- 45 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
Counties Gallatin County, MT, Madison County, MT
The radar
The Great Falls radar (KTFX), 227 km from the middle of the area, began a volume at 23:03 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 |
|---|---|---|---|
| Jul 17, 2:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 11.0 hours before the alert went out and 238 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1289 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 3:01 PM MDT, 1 hour 59 minutes earlier.
Area forecast discussion, Jul 17, 3:01 PM MDT, 1 hour 59 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Jul 17, 4:16 AM MDT, 12 hours 44 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 416 AM MDT WED JUL 17 2013 MTZ008>015-044>055-181030- BEAVERHEAD-NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL- CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-MADISON- TOOLE-LIBERTY-EASTERN PONDERA-BLAINE- SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON-JUDITH BASIN-FERGUS- JEFFERSON-BROADWATER-MEAGHER-GALLATIN- 416 AM MDT WED JUL 17 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MONTANA...NORTH CENTRAL MONTANA AND SOUTHWEST MONTANA. .DAY ONE...TODAY AND TONIGHT STRONG TO SEVERE THUNDERSTORMS WITH STRONG TO DAMAGING WINDS...HAIL AND LOCALLY HEAVY RAIN ARE EXPECTED THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THE PROBABILITY IS LOW FOR WIDESPREAD HAZARDOUS WEATHER. .SPOTTER INFORMATION STATEMENT... ANY REPORTS OF STRONG WINDS...HAIL AND/OR STORM DAMAGE WOULD BE GREATLY APPRECIATED AND CAN BE RELAYED TO THE NWS GREAT FALLS OR LOCAL LAW ENFORCEMENT.
In the hours before
Local storm report, Jul 17, 4:45 PM MDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
445 PM MDT WED JUL 17 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0444 PM HAIL 2 N HELENA 46.63N 112.02W
07/17/2013 E0.50 INCH LEWIS AND CLARK MT TRAINED SPOTTER
HALF INCH HAIL ON THE NORTH SIDE OF HELENA.
&&
BRUSDASpecial weather statement, Jul 17, 4:45 PM MDT, 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
445 PM MDT WED JUL 17 2013
MTZ008-172330-
BEAVERHEAD MT-
445 PM MDT WED JUL 17 2013
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN BEAVERHEAD COUNTY
UNTIL 530 PM MDT...
AT 442 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 5 MILES SOUTH OF LIMA...OR 35 MILES WEST OF
IDMON...MOVING EAST AT 30 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.
* LOCATIONS IMPACTED INCLUDE...
MONIDA...
THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT
WEDNESDAY EVENING FOR WESTERN MONTANA.
LAT...LON 4447 11246 4446 11250 4448 11260 4448 11268
4449 11270 4479 11261 4474 11184 4455 11187
4452 11212 4456 11229 4453 11234 4446 11236
4444 11243
TIME...MOT...LOC 2245Z 279DEG 28KT 4456 11253
NLLocal storm report, Jul 17, 4:46 PM MDT, 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
446 PM MDT WED JUL 17 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0438 PM HAIL 3 W HELENA 46.60N 112.08W
07/17/2013 E0.75 INCH LEWIS AND CLARK MT TRAINED SPOTTER
PENNY SIZE HAIL ON THE WEST SIDE OF HELENA.
&&
BRUSDALocal storm report, Jul 17, 4:48 PM MDT, 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
448 PM MDT WED JUL 17 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0446 PM HAIL ENNIS 45.35N 111.73W
07/17/2013 E0.25 INCH MADISON MT TRAINED SPOTTER
PEA SIZE HAIL
&&
BRUSDASpecial weather statement, Jul 17, 4:51 PM MDT, 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 451 PM MDT WED JUL 17 2013 MTZ015-172330- MADISON MT- 451 PM MDT WED JUL 17 2013 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MADISON COUNTY UNTIL 530 PM MDT... AT 448 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8 MILES SOUTHWEST OF SHERIDAN...MOVING NORTHEAST AT 25 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. * LOCATIONS IMPACTED INCLUDE... LAURIN AND ALDER... SHERIDAN AND LAURIN... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT WEDNESDAY EVENING FOR WESTERN MONTANA. LAT...LON 4573 11192 4541 11170 4526 11231 4541 11245 TIME...MOT...LOC 2251Z 239DEG 23KT 4538 11227 NL
Special weather statement, Jul 17, 4:52 PM MDT, 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
452 PM MDT WED JUL 17 2013
MTZ008-015-172330-
BEAVERHEAD MT-MADISON MT-
452 PM MDT WED JUL 17 2013
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MADISON AND NORTHERN
BEAVERHEAD COUNTIES UNTIL 530 PM MDT...
AT 454 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 13 MILES WEST OF TWIN BRIDGES...OR 21 MILES
NORTHWEST OF SHERIDAN...MOVING NORTHEAST AT 20 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.
* LOCATIONS IMPACTED INCLUDE...
RURAL NORTHWESTERN MADISON COUNTY...
RURAL NORTHERN BEAVERHEAD COUNTY...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT
WEDNESDAY EVENING FOR WESTERN MONTANA.
LAT...LON 4566 11270 4564 11269 4569 11257 4577 11250
4575 11247 4575 11217 4569 11207 4547 11255
4556 11277
TIME...MOT...LOC 2252Z 211DEG 18KT 4559 11259
NLThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 2:53 PM MDT | Special Weather Statement | TFX | Madison | 52 min |
| Jul 17, 3:19 PM MDT | Special Weather Statement | TFX | 41 min | |
| Jul 17, 3:59 PM MDT | Special Weather Statement | TFX | Beaverhead | 46 min |
| Jul 17, 4:02 PM MDT | Special Weather Statement | TFX | Beaverhead | 43 min |
| Jul 17, 4:07 PM MDT | Special Weather Statement | TFX | Madison | 38 min |
| Jul 17, 4:23 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 37 min |
| Jul 17, 4:30 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 45 min |
| Jul 17, 4:31 PM MDT | Severe Thunderstorm Warning | TFX | Beaverhead, Madison | 44 min |
| Jul 17, 4:44 PM MDT | Special Weather Statement | TFX | Broadwater | 46 min |
| Jul 17, 4:51 PM MDT | Special Weather Statement | TFX | Madison | 39 min |
| Jul 17, 4:52 PM MDT | Special Weather Statement | TFX | Silver Bow | 38 min |
| Jul 17, 5:20 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 40 min |
| Jul 17, 5:43 PM MDT | Areal Flood Advisory | TFX | Jefferson, Lewis and Clark | 6 hr |
| Jul 17, 5:45 PM MDT | Special Weather Statement | TFX | Pondera | 45 min |
| Jul 17, 5:46 PM MDT | Special Weather Statement | TFX | Gallatin | 44 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2013Every severe thunderstorm warning in 2013
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.